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Red Hat Ceph Storage 4

Using the various application programming interfaces for Red Hat Ceph Storage

Red Hat Ceph Storage Documentation Team

Abstract

This document provides instructions for Using the various application programming interfaces for Red Hat Ceph Storage running on AMD64 and Intel 64 architectures.
Red Hat is committed to replacing problematic language in our code, documentation, and web properties. We are beginning with these four terms: master, slave, blacklist, and whitelist. Because of the enormity of this endeavor, these changes will be implemented gradually over several upcoming releases. For more details, see our CTO Chris Wright's message.

Chapter 1. Ceph Object Gateway administrative API

As a developer, you can administer the Ceph Object Gateway by interacting with the RESTful application programing interface (API). The Ceph Object Gateway makes available the features of the radosgw-admin command in a RESTful API. You can manage users, data, quotas and usage which you can integrate with other management platforms.

Note

Red Hat recommends using the command-line interface when configuring the Ceph Object Gateway.

The administrative API provides the following functionality:

1.1. Prerequisites

  • A running Red Hat Ceph Storage cluster.
  • A RESTful client.

1.2. Administration operations

An administrative Application Programming Interface (API) request will be done on a URI that starts with the configurable 'admin' resource entry point. Authorization for the administrative API duplicates the S3 authorization mechanism. Some operations require that the user holds special administrative capabilities. The response entity type, either XML or JSON, might be specified as the 'format' option in the request and defaults to JSON if not specified.

Example

PUT /admin/user?caps&format=json HTTP/1.1
Host: FULLY_QUALIFIED_DOMAIN_NAME
Content-Type: text/plain
Authorization: AUTHORIZATION_TOKEN

usage=read

1.3. Administration authentication requests

Amazon’s S3 service uses the access key and a hash of the request header and the secret key to authenticate the request. It has the benefit of providing an authenticated request, especially large uploads, without SSL overhead.

Most use cases for the S3 API involve using open source S3 clients such as the AmazonS3Client in the Amazon SDK for Java or Python Boto. These libraries do not support the Ceph Object Gateway Admin API. You can subclass and extend these libraries to support the Ceph Admin API. Alternatively, you can create a unique Gateway client.

Creating an execute() method

The CephAdminAPI example class in this section illustrates how to create an execute() method that can take request parameters, authenticate the request, call the Ceph Admin API and receive a response.

The CephAdminAPI class example is not supported or intended for commercial use. It is for illustrative purposes only.

Calling the Ceph Object Gateway

The client code contains five calls to the Ceph Object Gateway to demonstrate CRUD operations:

  • Create a User
  • Get a User
  • Modify a User
  • Create a Subuser
  • Delete a User

To use this example, get the httpcomponents-client-4.5.3 Apache HTTP components. You can download it for example here: http://hc.apache.org/downloads.cgi. Then unzip the tar file, navigate to its lib directory and copy the contents to the /jre/lib/ext directory of the JAVA_HOME directory, or a custom classpath.

As you examine the CephAdminAPI class example, notice that the execute() method takes an HTTP method, a request path, an optional subresource, null if not specified, and a map of parameters. To execute with subresources, for example, subuser, and key, you will need to specify the subresource as an argument in the execute() method.

The example method:

  1. Builds a URI.
  2. Builds an HTTP header string.
  3. Instantiates an HTTP request, for example, PUT, POST, GET, DELETE.
  4. Adds the Date header to the HTTP header string and the request header.
  5. Adds the Authorization header to the HTTP request header.
  6. Instantiates an HTTP client and passes it the instantiated HTTP request.
  7. Makes a request.
  8. Returns a response.

Building the header string

Building the header string is the portion of the process that involves Amazon’s S3 authentication procedure. Specifically, the example method does the following:

  1. Adds a request type, for example, PUT, POST, GET, DELETE.
  2. Adds the date.
  3. Adds the requestPath.

The request type should be upper case with no leading or trailing white space. If you do not trim white space, authentication will fail. The date MUST be expressed in GMT, or authentication will fail.

The exemplary method does not have any other headers. The Amazon S3 authentication procedure sorts x-amz headers lexicographically. So if you are adding x-amz headers, be sure to add them lexicographically.

Once you have built the header string, the next step is to instantiate an HTTP request and pass it the URI. The examplary method uses PUT for creating a user and subuser, GET for getting a user, POST for modifying a user and DELETE for deleting a user.

Once you instantiate a request, add the Date header followed by the Authorization header. Amazon’s S3 authentication uses the standard Authorization header, and has the following structure:

Authorization: AWS ACCESS_KEY:HASH_OF_HEADER_AND_SECRET

The CephAdminAPI example class has a base64Sha1Hmac() method, which takes the header string and the secret key for the admin user, and returns a SHA1 HMAC as a base-64 encoded string. Each execute() call will invoke the same line of code to build the Authorization header:

httpRequest.addHeader("Authorization", "AWS " + this.getAccessKey() + ":" + base64Sha1Hmac(headerString.toString(), this.getSecretKey()));

The following CephAdminAPI example class requires you to pass the access key, secret key and an endpoint to the constructor. The class provides accessor methods to change them at runtime.

Example

import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.time.OffsetDateTime;
import java.time.format.DateTimeFormatter;
import java.time.ZoneId;

import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.Header;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpRequestBase;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.client.methods.HttpDelete;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import org.apache.http.client.utils.URIBuilder;

import java.util.Base64;
import java.util.Base64.Encoder;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import javax.crypto.spec.SecretKeySpec;
import javax.crypto.Mac;

import java.util.Map;
import java.util.Iterator;
import java.util.Set;
import java.util.Map.Entry;

public class CephAdminAPI {

	/*
	 * Each call must specify an access key, secret key, endpoint and format.
	 */
	String accessKey;
	String secretKey;
	String endpoint;
	String scheme = "http"; //http only.
	int port = 80;

	/*
	 * A constructor that takes an access key, secret key, endpoint and format.
	 */
	public CephAdminAPI(String accessKey, String secretKey, String endpoint){
		this.accessKey = accessKey;
		this.secretKey = secretKey;
		this.endpoint = endpoint;
	}

	/*
	 * Accessor methods for access key, secret key, endpoint and format.
	 */
	public String getEndpoint(){
		return this.endpoint;
	}

	public void setEndpoint(String endpoint){
		this.endpoint = endpoint;
	}

	public String getAccessKey(){
		return this.accessKey;
	}

	public void setAccessKey(String accessKey){
		this.accessKey = accessKey;
	}

	public String getSecretKey(){
		return this.secretKey;
	}

	public void setSecretKey(String secretKey){
		this.secretKey = secretKey;
	}

	/*
	 * Takes an HTTP Method, a resource and a map of arguments and
	 * returns a CloseableHTTPResponse.
	 */
	public CloseableHttpResponse execute(String HTTPMethod, String resource,
                                        String subresource, Map arguments) {

		String httpMethod = HTTPMethod;
		String requestPath = resource;
		StringBuffer request = new StringBuffer();
		StringBuffer headerString = new StringBuffer();
		HttpRequestBase httpRequest;
		CloseableHttpClient httpclient;
		URI uri;
		CloseableHttpResponse httpResponse = null;

		try {

			uri = new URIBuilder()
				.setScheme(this.scheme)
				.setHost(this.getEndpoint())
				.setPath(requestPath)
				.setPort(this.port)
				.build();


			if (subresource != null){
				uri = new URIBuilder(uri)
					.setCustomQuery(subresource)
					.build();
			}


			for (Iterator iter = arguments.entrySet().iterator();
			iter.hasNext();) {
				Entry entry = (Entry)iter.next();
				uri = new URIBuilder(uri)
					.setParameter(entry.getKey().toString(),
                                 entry.getValue().toString())
					.build();

			}

			request.append(uri);

			headerString.append(HTTPMethod.toUpperCase().trim() + "\n\n\n");

			OffsetDateTime dateTime = OffsetDateTime.now(ZoneId.of("GMT"));
			DateTimeFormatter formatter = DateTimeFormatter.RFC_1123_DATE_TIME;
			String date = dateTime.format(formatter);

			headerString.append(date + "\n");
			headerString.append(requestPath);

			if (HTTPMethod.equalsIgnoreCase("PUT")){
				httpRequest = new HttpPut(uri);
			} else if (HTTPMethod.equalsIgnoreCase("POST")){
				httpRequest = new HttpPost(uri);
			} else if (HTTPMethod.equalsIgnoreCase("GET")){
				httpRequest = new HttpGet(uri);
			} else if (HTTPMethod.equalsIgnoreCase("DELETE")){
				httpRequest = new HttpDelete(uri);
			} else {
				System.err.println("The HTTP Method must be PUT,
				POST, GET or DELETE.");
				throw new IOException();
			}

			httpRequest.addHeader("Date", date);
			httpRequest.addHeader("Authorization", "AWS " + this.getAccessKey()
			+ ":" + base64Sha1Hmac(headerString.toString(),
			this.getSecretKey()));

			httpclient = HttpClients.createDefault();
			httpResponse = httpclient.execute(httpRequest);

		} 	catch  (URISyntaxException e){
			System.err.println("The URI is not formatted properly.");
			e.printStackTrace();
		}  catch (IOException e){
			System.err.println("There was an error making the request.");
			e.printStackTrace();
		}
			return httpResponse;
	}

	/*
	 * Takes a uri and a secret key and returns a base64-encoded
	 * SHA-1 HMAC.
	 */
	public String base64Sha1Hmac(String uri, String secretKey) {
		try {

			byte[] keyBytes = secretKey.getBytes("UTF-8");
			SecretKeySpec signingKey = new SecretKeySpec(keyBytes, "HmacSHA1");

			Mac mac = Mac.getInstance("HmacSHA1");
			mac.init(signingKey);

			byte[] rawHmac = mac.doFinal(uri.getBytes("UTF-8"));

			Encoder base64 = Base64.getEncoder();
			return base64.encodeToString(rawHmac);

		} catch (Exception e) {
			throw new RuntimeException(e);
		}
	}

}

The subsequent CephAdminAPIClient example illustrates how to instantiate the CephAdminAPI class, build a map of request parameters, and use the execute() method to create, get, update and delete a user.

Example

import java.io.IOException;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.HttpEntity;
import org.apache.http.util.EntityUtils;
import java.util.*;


public class CephAdminAPIClient {

	public static void main (String[] args){

		CephAdminAPI adminApi = new CephAdminAPI ("FFC6ZQ6EMIF64194158N",
		                            "Xac39eCAhlTGcCAUreuwe1ZuH5oVQFa51lbEMVoT",
		                            "ceph-client");

		/*
		 * Create a user
		 */
		Map requestArgs = new HashMap();
		requestArgs.put("access", "usage=read, write; users=read, write");
		requestArgs.put("display-name", "New User");
		requestArgs.put("email", "new-user@email.com");
		requestArgs.put("format", "json");
		requestArgs.put("uid", "new-user");

		CloseableHttpResponse response =
			adminApi.execute("PUT", "/admin/user", null, requestArgs);

		System.out.println(response.getStatusLine());
		HttpEntity entity = response.getEntity();

		try {
			System.out.println("\nResponse Content is: "
				+ EntityUtils.toString(entity, "UTF-8") + "\n");
			response.close();
		} catch (IOException e){
			System.err.println ("Encountered an I/O exception.");
			e.printStackTrace();
		}

		/*
		 * Get a user
		 */
		requestArgs = new HashMap();
		requestArgs.put("format", "json");
		requestArgs.put("uid", "new-user");

		response = adminApi.execute("GET", "/admin/user", null, requestArgs);

		System.out.println(response.getStatusLine());
		entity = response.getEntity();

		try {
			System.out.println("\nResponse Content is: "
				+ EntityUtils.toString(entity, "UTF-8") + "\n");
			response.close();
		} catch (IOException e){
			System.err.println ("Encountered an I/O exception.");
			e.printStackTrace();
		}

		/*
		 * Modify a user
		 */
		requestArgs = new HashMap();
		requestArgs.put("display-name", "John Doe");
		requestArgs.put("email", "johndoe@email.com");
		requestArgs.put("format", "json");
		requestArgs.put("uid", "new-user");
		requestArgs.put("max-buckets", "100");

		response = adminApi.execute("POST", "/admin/user", null, requestArgs);

		System.out.println(response.getStatusLine());
		entity = response.getEntity();

		try {
			System.out.println("\nResponse Content is: "
				+ EntityUtils.toString(entity, "UTF-8") + "\n");
			response.close();
		} catch (IOException e){
			System.err.println ("Encountered an I/O exception.");
			e.printStackTrace();
		}


		/*
		 * Create a subuser
		 */
		requestArgs = new HashMap();
		requestArgs.put("format", "json");
		requestArgs.put("uid", "new-user");
		requestArgs.put("subuser", "foobar");

		response = adminApi.execute("PUT", "/admin/user", "subuser", requestArgs);
		System.out.println(response.getStatusLine());
		entity = response.getEntity();

		try {
			System.out.println("\nResponse Content is: "
				+ EntityUtils.toString(entity, "UTF-8") + "\n");
			response.close();
		} catch (IOException e){
			System.err.println ("Encountered an I/O exception.");
			e.printStackTrace();
		}


		/*
		 * Delete a user
		 */
		requestArgs = new HashMap();
		requestArgs.put("format", "json");
		requestArgs.put("uid", "new-user");

		response = adminApi.execute("DELETE", "/admin/user", null, requestArgs);
		System.out.println(response.getStatusLine());
		entity = response.getEntity();

		try {
			System.out.println("\nResponse Content is: "
				+ EntityUtils.toString(entity, "UTF-8") + "\n");
			response.close();
		} catch (IOException e){
			System.err.println ("Encountered an I/O exception.");
			e.printStackTrace();
		}
	}
}

Additional Resources

1.4. Creating an administrative user

Important

To run the radosgw-admin command from the Ceph Object Gateway node, ensure the node has the admin key. The admin key can be copied from any Ceph Monitor node.

Prerequisites

  • Root-level access to the Ceph Object Gateway node.

Procedure

  1. Create an object gateway user:

    Syntax

    radosgw-admin user create --uid="USER_NAME" --display-name="DISPLAY_NAME"

    Example

    [user@client ~]$ radosgw-admin user create --uid="admin-api-user" --display-name="Admin API User"

    The radosgw-admin command-line interface will return the user.

    Example output

    {
        "user_id": "admin-api-user",
        "display_name": "Admin API User",
        "email": "",
        "suspended": 0,
        "max_buckets": 1000,
        "auid": 0,
        "subusers": [],
        "keys": [
            {
                "user": "admin-api-user",
                "access_key": "NRWGT19TWMYOB1YDBV1Y",
                "secret_key": "gr1VEGIV7rxcP3xvXDFCo4UDwwl2YoNrmtRlIAty"
            }
        ],
        "swift_keys": [],
        "caps": [],
        "op_mask": "read, write, delete",
        "default_placement": "",
        "placement_tags": [],
        "bucket_quota": {
            "enabled": false,
            "max_size_kb": -1,
            "max_objects": -1
        },
        "user_quota": {
            "enabled": false,
            "max_size_kb": -1,
            "max_objects": -1
        },
        "temp_url_keys": []
    }

  2. Assign administrative capabilities to the user you create:

    Syntax

    radosgw-admin caps add --uid="USER_NAME" --caps="users=*"

    Example

    [user@client ~]$ radosgw-admin caps add --uid=admin-api-user --caps="users=*"

    The radosgw-admin command-line interface will return the user. The "caps": will have the capabilities you assigned to the user:

    Example output

    {
        "user_id": "admin-api-user",
        "display_name": "Admin API User",
        "email": "",
        "suspended": 0,
        "max_buckets": 1000,
        "auid": 0,
        "subusers": [],
        "keys": [
            {
                "user": "admin-api-user",
                "access_key": "NRWGT19TWMYOB1YDBV1Y",
                "secret_key": "gr1VEGIV7rxcP3xvXDFCo4UDwwl2YoNrmtRlIAty"
            }
        ],
        "swift_keys": [],
        "caps": [
            {
                "type": "users",
                "perm": "*"
            }
        ],
        "op_mask": "read, write, delete",
        "default_placement": "",
        "placement_tags": [],
        "bucket_quota": {
            "enabled": false,
            "max_size_kb": -1,
            "max_objects": -1
        },
        "user_quota": {
            "enabled": false,
            "max_size_kb": -1,
            "max_objects": -1
        },
        "temp_url_keys": []
    }

    Now you have a user with administrative privileges.

1.5. Get user information

Get the user’s information.

Capabilities

users=read

Syntax

GET /admin/user?format=json HTTP/1.1
Host: FULLY_QUALIFIED_DOMAIN_NAME

Table 1.1. Request Parameters
NameDescriptionTypeExampleRequired

uid

The user for which the information is requested.

String

foo_user

Yes

Table 1.2. Response Entities
NameDescriptionTypeParent

user

A container for the user data information.

Container

N/A

user_id

The user ID.

String

user

display_name

Display name for the user.

String

user

suspended

True if the user is suspended.

Boolean

user

max_buckets

The maximum number of buckets to be owned by the user.

Integer

user

subusers

Subusers associated with this user account.

Container

user

keys

S3 keys associated with this user account.

Container

user

swift_keys

Swift keys associated with this user account.

Container

user

caps

User capabilities.

Container

user

If successful, the response contains the user information.

Special Error Responses

None.

1.6. Create a user

Create a new user. By Default, a S3 key pair will be created automatically and returned in the response. If only one of access-key or secret-key is provided, the omitted key will be automatically generated. By default, a generated key is added to the keyring without replacing an existing key pair. If access-key is specified and refers to an existing key owned by the user then it will be modified.

Capabilities

`users=write`

Syntax

PUT /admin/user?format=json HTTP/1.1
Host: FULLY_QUALIFIED_DOMAIN_NAME

Table 1.3. Request Parameters
NameDescriptionTypeExampleRequired

uid

The user ID to be created.

String

foo_user

Yes

display-name

The display name of the user to be created.

String

foo user

Yes

email

The email address associated with the user.

String

foo@bar.com

No

key-type

Key type to be generated, options are: swift, s3 (default).

String

s3 [s3]

No

access-key

Specify access key.

String

ABCD0EF12GHIJ2K34LMN

No

secret-key

Specify secret key.

String

0AbCDEFg1h2i34JklM5nop6QrSTUV+WxyzaBC7D8

No

user-caps

User capabilities.

String

usage=read, write; users=read

No

generate-key

Generate a new key pair and add to the existing keyring.

Boolean

True [True]

No

max-buckets

Specify the maximum number of buckets the user can own.

Integer

500 [1000]

No

suspended

Specify whether the user should be suspended.

Boolean

False [False]

No

Table 1.4. Response Entities
NameDescriptionTypeParent

user

A container for the user data information.

Container

N/A

user_id

The user ID.

String

user

display_name

Display name for the user.

String

user

suspended

True if the user is suspended.

Boolean

user

max_buckets

The maximum number of buckets to be owned by the user.

Integer

user

subusers

Subusers associated with this user account.

Container

user

keys

S3 keys associated with this user account.

Container

user

swift_keys

Swift keys associated with this user account.

Container

user

caps

User capabilities.

Container

user

If successful, the response contains the user information.

Table 1.5. Special Error Responses
NameDescriptionCode

UserExists

Attempt to create existing user.

409 Conflict

InvalidAccessKey

Invalid access key specified.

400 Bad Request

InvalidKeyType

Invalid key type specified.

400 Bad Request

InvalidSecretKey

Invalid secret key specified.

400 Bad Request

InvalidKeyType

Invalid key type specified.

400 Bad Request

KeyExists

Provided access key exists and belongs to another user.

409 Conflict

EmailExists

Provided email address exists.

409 Conflict

InvalidCap

Attempt to grant invalid admin capability.

400 Bad Request

Additional Resources

1.7. Modify a user

Modify an existing user.

Capabilities

`users=write`

Syntax

POST /admin/user?format=json HTTP/1.1
Host: FULLY_QUALIFIED_DOMAIN_NAME

Table 1.6. Request Parameters
NameDescriptionTypeExampleRequired

uid

The user ID to be modified.

String

foo_user

Yes

display-name

The display name of the user to be modified.

String

foo user

No

email

The email address to be associated with the user.

String

foo@bar.com

No

generate-key

Generate a new key pair and add to the existing keyring.

Boolean

True [False]

No

access-key

Specify access key.

String

ABCD0EF12GHIJ2K34LMN

No

secret-key

Specify secret key.

String

0AbCDEFg1h2i34JklM5nop6QrSTUV+WxyzaBC7D8

No

key-type

Key type to be generated, options are: swift, s3 (default).

String

s3

No

user-caps

User capabilities.

String

usage=read, write; users=read

No

max-buckets

Specify the maximum number of buckets the user can own.

Integer

500 [1000]

No

suspended

Specify whether the user should be suspended.

Boolean

False [False]

No

Table 1.7. Response Entities
NameDescriptionTypeParent

user

A container for the user data information.

Container

N/A

user_id

The user ID.

String

user

display_name

Display name for the user.

String

user

suspended

True if the user is suspended.

Boolean

user

max_buckets

The maximum number of buckets to be owned by the user.

Integer

user

subusers

Subusers associated with this user account.

Container

user

keys

S3 keys associated with this user account.

Container

user

swift_keys

Swift keys associated with this user account.

Container

user

caps

User capabilities.

Container

user

If successful, the response contains the user information.

Table 1.8. Special Error Responses
NameDescriptionCode

InvalidAccessKey

Invalid access key specified.

400 Bad Request

InvalidKeyType

Invalid key type specified.

400 Bad Request

InvalidSecretKey

Invalid secret key specified.

400 Bad Request

KeyExists

Provided access key exists and belongs to another user.

409 Conflict

EmailExists

Provided email address exists.

409 Conflict

InvalidCap

Attempt to grant invalid admin capability.

400 Bad Request

Additional Resources

1.8. Remove a user

Remove an existing user.

Capabilities

`users=write`

Syntax

DELETE /admin/user?format=json HTTP/1.1
Host: FULLY_QUALIFIED_DOMAIN_NAME

Table 1.9. Request Parameters
NameDescriptionTypeExampleRequired

uid

The user ID to be removed.

String

foo_user

Yes.

purge-data

When specified the buckets and objects belonging to the user will also be removed.

Boolean

True

No

Response Entities

None.

Special Error Responses

None.

Additional Resources

1.9. Create a subuser

Create a new subuser, primarily useful for clients using the Swift API.

Note

Either gen-subuser or subuser is required for a valid request. In general, for a subuser to be useful, it must be granted permissions by specifying access. As with user creation if subuser is specified without secret, then a secret key will be automatically generated.

Capabilities

`users=write`

Syntax

PUT /admin/user?subuser&format=json HTTP/1.1
Host FULLY_QUALIFIED_DOMAIN_NAME

Table 1.10. Request Parameters
NameDescriptionTypeExampleRequired

uid

The user ID under which a subuser is to be created.

String

foo_user

Yes

subuser

Specify the subuser ID to be created.

String

sub_foo

Yes (or gen-subuser)

gen-subuser

Specify the subuser ID to be created.

String

sub_foo

Yes (or subuser)

secret-key

Specify secret key.

String

0AbCDEFg1h2i34JklM5nop6QrSTUVWxyzaBC7D8

No

key-type

Key type to be generated, options are: swift (default), s3.

String

swift [swift]

No

access

Set access permissions for sub-user, should be one of read, write, readwrite, full.

String

read

No

generate-secret

Generate the secret key.

Boolean

True [False]

No

Table 1.11. Response Entities
NameDescriptionTypeParent

subusers

Subusers associated with the user account.

Container

N/A

id

Subuser ID.

String

subusers

permissions

Subuser access to user account.

String

subusers

If successful, the response contains the subuser information.

Table 1.12. Special Error Responses
NameDescriptionCode

SubuserExists

Specified subuser exists.

409 Conflict

InvalidKeyType

Invalid key type specified.

400 Bad Request

InvalidSecretKey

Invalid secret key specified.

400 Bad Request

InvalidAccess

Invalid subuser access specified.

400 Bad Request

1.10. Modify a subuser

Modify an existing subuser.

Capabilities

`users=write`

Syntax

POST /admin/user?subuser&format=json HTTP/1.1
Host FULLY_QUALIFIED_DOMAIN_NAME

Table 1.13. Request Parameters
NameDescriptionTypeExampleRequired

uid

The user ID under which the subuser is to be modified.

String

foo_user

Yes

subuser

The subuser ID to be modified.

String

sub_foo

Yes

generate-secret

Generate a new secret key for the subuser, replacing the existing key.

Boolean

True [False]

No

secret

Specify secret key.

String

0AbCDEFg1h2i34JklM5nop6QrSTUV+WxyzaBC7D8

No

key-type

Key type to be generated, options are: swift (default), s3.

String

swift [swift]

No

access

Set access permissions for sub-user, should be one of read, write, readwrite, full.

String

read

No

Table 1.14. Response Entities
NameDescriptionTypeParent

subusers

Subusers associated with the user account.

Container

N/A

id

Subuser ID.

String

subusers

permissions

Subuser access to user account.

String

subusers

If successful, the response contains the subuser information.

Table 1.15. Special Error Responses
NameDescriptionCode

InvalidKeyType

Invalid key type specified.

400 Bad Request

InvalidSecretKey

Invalid secret key specified.

400 Bad Request

InvalidAccess

Invalid subuser access specified.

400 Bad Request

1.11. Remove a subuser

Remove an existing subuser.

Capabilities

`users=write`

Syntax

DELETE /admin/user?subuser&format=json HTTP/1.1
Host FULLY_QUALIFIED_DOMAIN_NAME

Table 1.16. Request Parameters
NameDescriptionTypeExampleRequired

uid

The user ID under which the subuser is to be removed.

String

foo_user

Yes

subuser

The subuser ID to be removed.

String

sub_foo

Yes

purge-keys

Remove keys belonging to the subuser.

Boolean

True [True]

No

Response Entities

None.

Special Error Responses

None.

1.12. Add capabilities to a user

Add an administrative capability to a specified user.

Capabilities

`users=write`

Syntax

PUT /admin/user?caps&format=json HTTP/1.1
Host FULLY_QUALIFIED_DOMAIN_NAME

Table 1.17. Request Parameters
NameDescriptionTypeExampleRequired

uid

The user ID to add an administrative capability to.

String

foo_user

Yes

user-caps

The administrative capability to add to the user.

String

usage=read, write

Yes

Table 1.18. Response Entities
NameDescriptionTypeParent

user

A container for the user data information.

Container

N/A

user_id

The user ID.

String

user

caps

User capabilities.

Container

user

If successful, the response contains the user’s capabilities.

Table 1.19. Special Error Responses
NameDescriptionCode

InvalidCap

Attempt to grant invalid admin capability.

400 Bad Request

1.13. Remove capabilities from a user

Remove an administrative capability from a specified user.

Capabilities

`users=write`

Syntax

DELETE /admin/user?caps&format=json HTTP/1.1
Host FULLY_QUALIFIED_DOMAIN_NAME

Table 1.20. Request Parameters
NameDescriptionTypeExampleRequired

uid

The user ID to remove an administrative capability from.

String

foo_user

Yes

user-caps

The administrative capabilities to remove from the user.

String

usage=read, write

Yes

Table 1.21. Response Entities
NameDescriptionTypeParent

user

A container for the user data information.

Container

N/A

user_id

The user ID.

String

user

caps

User capabilities.

Container

user

If successful, the response contains the user’s capabilities.

Table 1.22. Special Error Responses
NameDescriptionCode

InvalidCap

Attempt to remove an invalid admin capability.

400 Bad Request

NoSuchCap

User does not possess specified capability.

404 Not Found

1.14. Create a key

Create a new key. If a subuser is specified then by default created keys will be swift type. If only one of access-key or secret-key is provided the committed key will be automatically generated, that is if only secret-key is specified then access-key will be automatically generated. By default, a generated key is added to the keyring without replacing an existing key pair. If access-key is specified and refers to an existing key owned by the user then it will be modified. The response is a container listing all keys of the same type as the key created.

Note

When creating a swift key, specifying the option access-key will have no effect. Additionally, only one swift key might be held by each user or subuser.

Capabilities

`users=write`

Syntax

PUT /admin/user?key&format=json HTTP/1.1
Host FULLY_QUALIFIED_DOMAIN_NAME

Table 1.23. Request Parameters
NameDescriptionTypeExampleRequired

uid

The user ID to receive the new key.

String

foo_user

Yes

subuser

The subuser ID to receive the new key.

String

sub_foo

No

key-type

Key type to be generated, options are: swift, s3 (default).

String

s3 [s3]

No

access-key

Specify the access key.

String

AB01C2D3EF45G6H7IJ8K

No

secret-key

Specify the secret key.

String

0ab/CdeFGhij1klmnopqRSTUv1WxyZabcDEFgHij

No

generate-key

Generate a new key pair and add to the existing keyring.

Boolean

True [True]

No

Table 1.24. Response Entities
NameDescriptionTypeParent

keys

Keys of type created associated with this user account.

Container

N/A

user

The user account associated with the key.

String

keys

access-key

The access key.

String

keys

secret-key

The secret key

String

keys

Table 1.25. Special Error Responses
NameDescriptionCode

InvalidAccessKey

Invalid access key specified.

400 Bad Request

InvalidKeyType

Invalid key type specified.

400 Bad Request

InvalidSecretKey

Invalid secret key specified.

400 Bad Request

InvalidKeyType

Invalid key type specified.

400 Bad Request

KeyExists

Provided access key exists and belongs to another user.

409 Conflict

1.15. Remove a key

Remove an existing key.

Capabilities

`users=write`

Syntax

DELETE /admin/user?key&format=json HTTP/1.1
Host FULLY_QUALIFIED_DOMAIN_NAME

Table 1.26. Request Parameters
NameDescriptionTypeExampleRequired

access-key

The S3 access key belonging to the S3 key pair to remove.

String

AB01C2D3EF45G6H7IJ8K

Yes

uid

The user to remove the key from.

String

foo_user

No

subuser

The subuser to remove the key from.

String

sub_foo

No

key-type

Key type to be removed, options are: swift, s3.

Note

Required to remove swift key.

String

swift

No

Special Error Responses

None.

Response Entities

None.

1.16. Bucket notifications

As a storage administrator, you can use these APIs to provide configuration and control interfaces for the bucket notification mechanism. The API topics are named objects that contain the definition of a specific endpoint. Bucket notifications associate topics with a specific bucket. The S3 bucket operations section gives more details on bucket notifications.

Note

In all topic actions, the parameters are URL encoded, and sent in the message body using application/x-www-form-urlencoded content type.

Note

Any bucket notification already associated with the topic needs to be re-created for the topic update to take effect.

1.16.1. Prerequisites

  • Create bucket notifications on the Ceph Object Gateway.

1.16.2. Creating a topic

You can create topics before creating bucket notifications. A topic is a Simple Notification Service (SNS) entity and all the topic operations, that is, create, delete, list and get, are SNS operations. The topic needs to have endpoint parameters that are used when a bucket notification is created. Once the request is successful, the response includes the topic Amazon Resource Name (ARN) that can be used later to reference this topic in the bucket notification request.

Note

A topic_arn provides the bucket notification configuration, and is generated after a topic is created.

Prerequisites

  • A running Red Hat Ceph Storage cluster.
  • Root-level access.
  • Installation of the Ceph Object Gateway.
  • User access key and secret key.
  • Endpoint parameters.

Procedure

  1. Create a topic with the following request format:

    Syntax

    POST
    Action=CreateTopic
    &Name=TOPIC_NAME
    [&Attributes.entry.1.key=amqp-exchange&Attributes.entry.1.value=EXCHANGE]
    [&Attributes.entry.2.key=amqp-ack-level&Attributes.entry.2.value=none|broker|routable]
    [&Attributes.entry.3.key=verify-ssl&Attributes.entry.3.value=true|false]
    [&Attributes.entry.4.key=kafka-ack-level&Attributes.entry.4.value=none|broker]
    [&Attributes.entry.5.key=use-ssl&Attributes.entry.5.value=true|false]
    [&Attributes.entry.6.key=ca-location&Attributes.entry.6.value=FILE_PATH]
    [&Attributes.entry.7.key=OpaqueData&Attributes.entry.7.value=OPAQUE_DATA]
    [&Attributes.entry.8.key=push-endpoint&Attributes.entry.8.value=ENDPOINT]

    Here are the request parameters:

    • Endpoint: URL of an endpoint to send notifications to.
    • OpaqueData: opaque data is set in the topic configuration and added to all notifications triggered by the topic.
    • HTTP endpoint:

      • URL: http[s]://FQDN[: PORT ]
      • port defaults to: Use 80/443 for HTTP[S] accordingly.
      • verify-ssl: Indicates whether the server certificate is validated by the client or not. By default , it is true.
    • AMQP0.9.1 endpoint:

      • URL: amqp://[USER : PASSWORD @] FQDN [: PORT][/VHOST].
      • User and password defaults to: guest and guest respectively.
      • User and password can only be provided with HTTPS. Otherwise, the topic creation request is rejected.
      • port defaults to: 5672.
      • vhost defaults to: “/”
      • amqp-exchange: The exchanges must exist and be able to route messages based on topics. This is a mandatory parameter for AMQP0.9.1. Different topics pointing to the same endpoint must use the same exchange.
      • amqp-ack-level: No end to end acknowledgement is required, as messages may persist in the broker before being delivered into their final destination. Three acknowledgement methods exist:

        • none: Message is considered delivered if sent to the broker.
        • broker: By default the message is considered delivered if acknowledged by the broker.
        • routable: Message is considered delivered if the broker can route to a consumer.

          Note

          The key and value of a specific parameter does not have to reside in the same line, or in any specific order, but must use the same index. Attribute indexing does not need to be sequential or start from any specific value.

          Note

          The topic-name is used for the AMQP topic.

    • Kafka endpoint:

      • URL: kafka://[USER: PASSWORD @] FQDN[: PORT].
      • If use-ssl is set to false by default. If use-ssl is set to true, secure connection is used for connecting with the broker.
      • If ca-location is provided, and secure connection is used, the specified CA will be used, instead of the default one, to authenticate the broker.
      • User and password can only be provided over HTTP[S]. If not,topic creation request will be rejected.
      • User and password may only be provided together with use-ssl, if not, connection to the broker would fail.
      • port defaults to: 9092.
      • kafka-ack-level: no end to end acknowledgement required, as messages may persist in the broker before being delivered into their final destination. Two acknowledgement methods exist:

        • none: message is considered delivered if sent to the broker.
        • broker: By default, the message is considered delivered if acknowledged by the broker.
  2. Create a response in the following format:

    Syntax

    <CreateTopicResponse xmlns="https://sns.amazonaws.com/doc/2010-03-31/">
        <CreateTopicResult>
            <TopicArn></TopicArn>
        </CreateTopicResult>
        <ResponseMetadata>
            <RequestId></RequestId>
        </ResponseMetadata>
    </CreateTopicResponse>

    Note

    The topic Amazon Resource Name (ARN) in the response will have the following format: arn:aws:sns:ZONE_GROUP:TENANT:TOPIC

    The following is an example of AMQP0.9.1 endpoint:

    Syntax

    "client.create_topic(Name='my-topic' , Attributes={'push-endpoint': 'amqp://127.0.0.1:5672', 'amqp-exchange': 'ex1', 'amqp-ack-level': 'broker'})"

1.16.3. Getting topic information

Returns information about specific topic. This can include endpoint information if it is provided.

Prerequisites

  • A running Red Hat Ceph Storage cluster.
  • Root-level access.
  • Installation of the Ceph Object Gateway.
  • User access key and secret key.
  • Endpoint parameters.

Procedure

  1. Get topic information with the following request format:

    Syntax

    POST
    Action=GetTopic
    &TopicArn=TOPIC_ARN

    Here is an example of the response format:

    <GetTopicResponse>
      <GetTopicRersult>
        <Topic>
          <User>
          </User>
          <Name>
          </Name>
          <EndPoint>
            <EndpointAddress>
            </EndpointAddress>
            <EndpointArgs>
            </EndpointArgs>
            <EndpointTopic>
            </EndpointTopic>
          </EndPoint>
          <TopicArn>
          </TopicArn>
          <OpaqueData>
          </OpaqueData>
        </Topic>
      </GetTopicResult>
      <ResponseMetadata>
        <RequestId>
        </RequestId>
      </ResponseMetadata>
    </GetTopicResponse>

    These are the tags and their definitions:

    • User: Name of the user that created the topic.
    • Name: Name of the topic.
    • EndpointAddress: The endpoint URL. If the endpoint URL contains user and password information, request must be made over HTTPS. If not, the topic get request will be rejected.
    • EndPointArgs: The endpoint arguments.
    • EndpointTopic: The topic name that will be sent to the endpoint, can be different than the above topic name.
    • TopicArn: Topic ARN.

1.16.4. Listing topics

List the topics that the user has defined.

Prerequisites

  • A running Red Hat Ceph Storage cluster.
  • Root-level access.
  • Installation of the Ceph Object Gateway.
  • User access key and secret key.
  • Endpoint parameters.

Procedure

  1. List topic information with the following request format:

    POST
    Action=ListTopics

    Here is an example of the response format:

    <ListTopicdResponse xmlns="https://sns.amazonaws.com/doc/2020-03-31/">
      <ListTopicsRersult>
        <Topics>
          <member>
            <User>
            </User>
            <Name>
            </Name>
            <EndPoint>
              <EndpointAddress>
              </EndpointAddress>
              <EndpointArgs>
              </EndpointArgs>
              <EndpointTopic>
              </EndpointTopic>
            </EndPoint>
            <TopicArn>
            </TopicArn>
            <OpaqueData>
            </OpaqueData>
          </member>
        </Topics>
      </ListTopicsResult>
      <ResponseMetadata>
        <RequestId>
        </RequestId>
      </ResponseMetadata>
    </ListTopicsResponse>
    Note

    If endpoint URL contains user and password information, in any of the topics, the request must be made over HTTPS. If not, topic list request is rejected.

1.16.5. Deleting topics

Removing a deleted topic results with no operation and not a failure.

Prerequisites

  • A running Red Hat Ceph Storage cluster.
  • Root-level access.
  • Installation of the Ceph Object Gateway.
  • User access key and secret key.
  • Endpoint parameters.

Procedure

  1. Delete a topic with the following request format:

    Syntax

    POST
    Action=DeleteTopic
    &TopicArn=TOPIC_ARN

    Here is an example of the response format:

    <DeleteTopicResponse xmlns="https://sns.amazonaws.com/doc/2020-03-31/">
      <ResponseMetadata>
        <RequestId>
        </RequestId>
      </ResponseMetadata>
    </DeleteTopicResponse>

1.16.6. Event record

An event holds information about the operation done by the Ceph Object Gateway and is sent as a payload over the chosen endpoint, such as, HTTP, HTTPS, Kafka or AMQ0.9.1. The event record is in a JSON format.

Example

{"Records":[
    {
        "eventVersion":"2.1",
        "eventSource":"ceph:s3",
        "awsRegion":"us-east-1",
        "eventTime":"2019-11-22T13:47:35.124724Z",
        "eventName":"s3:ObjectCreated:Put",
        "userIdentity":{
            "principalId":"tester"
        },
        "requestParameters":{
            "sourceIPAddress":""
        },
        "responseElements":{
            "x-amz-request-id":"503a4c37-85eb-47cd-8681-2817e80b4281.5330.903595",
            "x-amz-id-2":"14d2-zone1-zonegroup1"
        },
        "s3":{
            "s3SchemaVersion":"1.0",
            "configurationId":"mynotif1",
            "bucket":{
                "name":"mybucket1",
                "ownerIdentity":{
                    "principalId":"tester"
                },
                "arn":"arn:aws:s3:us-east-1::mybucket1",
                "id":"503a4c37-85eb-47cd-8681-2817e80b4281.5332.38"
            },
            "object":{
                "key":"myimage1.jpg",
                "size":"1024",
                "eTag":"37b51d194a7513e45b56f6524f2d51f2",
                "versionId":"",
                "sequencer": "F7E6D75DC742D108",
                "metadata":[],
                "tags":[]
            }
        },
        "eventId":"",
        "opaqueData":"me@example.com"
    }
]}

These are the event record keys and their definitions:

  • awsRegion: Zonegroup.
  • eventTime: Timestamp that indicates when the event was triggered.
  • eventName: The type of the event.
  • userIdentity.principalId: The identity of the user that triggered the event.
  • requestParameters.sourceIPAddress: The IP address of the client that triggered the event. This field is not supported.
  • responseElements.x-amz-request-id: The request ID that triggered the event.
  • responseElements.x_amz_id_2: The identity of the Ceph Object Gateway on which the event was triggered. The identity format is RGWID-ZONE-ZONEGROUP.
  • s3.configurationId: The notification ID that created the event.
  • s3.bucket.name: The name of the bucket.
  • s3.bucket.ownerIdentity.principalId: The owner of the bucket.
  • s3.bucket.arn: Amazon Resource Name (ARN) of the bucket.
  • s3.bucket.id: Identity of the bucket.
  • s3.object.key: The object key.
  • s3.object.size: The size of the object.
  • s3.object.eTag: The object etag.
  • s3.object.version: The object version in a versioned bucket.
  • s3.object.sequencer: Monotonically increasing identifier of the change per object in the hexadecimal format.
  • s3.object.metadata: Any metadata set on the object sent as x-amz-meta.
  • s3.object.tags: Any tags set on the object.
  • s3.eventId: Unique identity of the event.
  • s3.opaqueData: Opaque data is set in the topic configuration and added to all notifications triggered by the topic.

Additional Resources

1.16.7. Supported event types

The following event types are supported:

  • s3:ObjectCreated:*
  • s3:ObjectCreated:Put
  • s3:ObjectCreated:Post
  • s3:ObjectCreated:Copy
  • s3:ObjectCreated:CompleteMultipartUpload
  • s3:ObjectRemoved:*
  • s3:ObjectRemoved:Delete
  • s3:ObjectRemoved:DeleteMarkerCreated

1.16.8. Additional Resources

  • See the Creating bucket notifications section is the Red Hat Ceph Storage Object Gateway Configuration and Administration Guide for more details.

1.17. Get bucket information

Get information about a subset of the existing buckets. If uid is specified without bucket then all buckets belonging to the user will be returned. If bucket alone is specified, information for that particular bucket will be retrieved.

Capabilities

`buckets=read`

Syntax

GET /admin/bucket?format=json HTTP/1.1
Host FULLY_QUALIFIED_DOMAIN_NAME

Table 1.27. Request Parameters
NameDescriptionTypeExampleRequired

bucket

The bucket to return info on.

String

foo_bucket

No

uid

The user to retrieve bucket information for.

String

foo_user

No

stats

Return bucket statistics.

Boolean

True [False]

No

Table 1.28. Response Entities
NameDescriptionTypeParent

stats

Per bucket information.

Container

N/A

buckets

Contains a list of one or more bucket containers.

Container

bucket

Container for single bucket information.

Container

buckets

name

The name of the bucket.

String

bucket

pool

The pool the bucket is stored in.

String

bucket

id

The unique bucket ID.

String

bucket

marker

Internal bucket tag.

String

bucket

owner

The user ID of the bucket owner.

String

bucket

usage

Storage usage information.

Container

bucket

index

If successful the request returns a buckets container containing the desired bucket information.

Table 1.29. Special Error Responses
NameDescriptionCode

IndexRepairFailed

Bucket index repair failed.

409 Conflict

1.18. Check a bucket index

Check the index of an existing bucket.

Note

To check multipart object accounting with check-objects, fix must be set to True.

Capabilities

buckets=write

Syntax

GET /admin/bucket?index&format=json HTTP/1.1
Host FULLY_QUALIFIED_DOMAIN_NAME

Table 1.30. Request Parameters
NameDescriptionTypeExampleRequired

bucket

The bucket to return info on.

String

foo_bucket

Yes

check-objects

Check multipart object accounting.

Boolean

True [False]

No

fix

Also fix the bucket index when checking.

Boolean

False [False]

No

Table 1.31. Response Entities
NameDescriptionType

index

Status of bucket index.

String

Table 1.32. Special Error Responses
NameDescriptionCode

IndexRepairFailed

Bucket index repair failed.

409 Conflict

1.19. Remove a bucket

Removes an existing bucket.

Capabilities

`buckets=write`

Syntax

DELETE /admin/bucket?format=json HTTP/1.1
Host FULLY_QUALIFIED_DOMAIN_NAME

Table 1.33. Request Parameters
NameDescriptionTypeExampleRequired

bucket

The bucket to remove.

String

foo_bucket

Yes

purge-objects

Remove a buckets objects before deletion.

Boolean

True [False]

No

Response Entities

None.

Table 1.34. Special Error Responses
NameDescriptionCode

BucketNotEmpty

Attempted to delete non-empty bucket.

409 Conflict

ObjectRemovalFailed

Unable to remove objects.

409 Conflict

1.22. Get a bucket or object policy

Read the policy of an object or bucket.

Capabilities

`buckets=read`

Syntax

GET /admin/bucket?policy&format=json HTTP/1.1
Host FULLY_QUALIFIED_DOMAIN_NAME

Table 1.40. Request Parameters
NameDescriptionTypeExampleRequired

bucket

The bucket to read the policy from.

String

foo_bucket

Yes

object

The object to read the policy from.

String

foo.txt

No

Table 1.41. Response Entities
NameDescriptionTypeParent

policy

Access control policy.

Container

N/A

If successful, returns the object or bucket policy

Table 1.42. Special Error Responses
NameDescriptionCode

IncompleteBody

Either bucket was not specified for a bucket policy request or bucket and object were not specified for an object policy request.

400 Bad Request

1.23. Remove an object

Remove an existing object.

Note

Does not require owner to be non-suspended.

Capabilities

`buckets=write`

Syntax

DELETE /admin/bucket?object&format=json HTTP/1.1
Host FULLY_QUALIFIED_DOMAIN_NAME

Table 1.43. Request Parameters
NameDescriptionTypeExampleRequired

bucket

The bucket containing the object to be removed.

String

foo_bucket

Yes

object

The object to remove.

String

foo.txt

Yes

Response Entities

None.

Table 1.44. Special Error Responses
NameDescriptionCode

NoSuchObject

Specified object does not exist.

404 Not Found

ObjectRemovalFailed

Unable to remove objects.

409 Conflict

1.24. Quotas

The administrative Operations API enables you to set quotas on users and on bucket owned by users. Quotas include the maximum number of objects in a bucket and the maximum storage size in megabytes.

To view quotas, the user must have a users=read capability. To set, modify or disable a quota, the user must have users=write capability.

Valid parameters for quotas include:

  • Bucket: The bucket option allows you to specify a quota for buckets owned by a user.
  • Maximum Objects: The max-objects setting allows you to specify the maximum number of objects. A negative value disables this setting.
  • Maximum Size: The max-size option allows you to specify a quota for the maximum number of bytes. A negative value disables this setting.
  • Quota Scope: The quota-scope option sets the scope for the quota. The options are bucket and user.

1.25. Get a user quota

To get a quota, the user must have users capability set with read permission.

Syntax

GET /admin/user?quota&uid=UID&quota-type=user

1.26. Set a user quota

To set a quota, the user must have users capability set with write permission.

Syntax

PUT /admin/user?quota&uid=UID&quota-type=user

The content must include a JSON representation of the quota settings as encoded in the corresponding read operation.

1.27. Get a bucket quota

To get a bucket quota, the user must have users capability set with read permission.

Syntax

GET /admin/user?quota&uid=UID&quota-type=bucket

1.28. Set a bucket quota

To set a quota, the user must have users capability set with write permission.

Syntax

PUT /admin/user?quota&uid=UID&quota-type=bucket

The content must include a JSON representation of the quota settings as encoded in the corresponding read operation.

1.29. Set quota for an individual bucket

To set a quota, the user must have buckets capability set with write permission.

Syntax

PUT /admin/bucket?quota&uid=UID&bucket=BUCKET_NAME&quota

The content must include a JSON representation of the quota settings.

1.30. Get usage information

Requesting bandwidth usage information.

Capabilities

`usage=read`

Syntax

GET /admin/usage?format=json HTTP/1.1
Host: FULLY_QUALIFIED_DOMAIN_NAME

Table 1.45. Request Parameters
NameDescriptionTypeRequired

uid

The user for which the information is requested.

String.

Yes

start

Date and (optional) time that specifies the start time of the requested data. E.g., 2012-09-25 16:00:00

String

No

end

Date and (optional) time that specifies the end time of the requested data (non-inclusive). E.g., 2012-09-25 16:00:00

String

No

show-entries

Specifies whether data entries should be returned.

Boolean

No

show-summary

Specifies whether data summary should be returned.

Boolean

No

Table 1.46. Response Entities
NameDescriptionType

usage

A container for the usage information.

Container

entries

A container for the usage entries information.

Container

user

A container for the user data information.

Container

owner

The name of the user that owns the buckets.

String

bucket

The bucket name.

String

time

Time lower bound for which data is being specified (rounded to the beginning of the first relevant hour).

String

epoch

The time specified in seconds since 1/1/1970.

String

categories

A container for stats categories.

Container

entry

A container for stats entry.

Container

category

Name of request category for which the stats are provided.

String

bytes_sent

Number of bytes sent by the Ceph Object Gateway.

Integer

bytes_received

Number of bytes received by the Ceph Object Gateway.

Integer

ops

Number of operations.

Integer

successful_ops

Number of successful operations.

Integer

summary

A container for stats summary.

Container

total

A container for stats summary aggregated total.

Container

If successful, the response contains the requested information.

1.31. Remove usage information

Remove usage information. With no dates specified, removes all usage information.

Capabilities

`usage=write`

Syntax

DELETE /admin/usage?format=json HTTP/1.1
Host: FULLY_QUALIFIED_DOMAIN_NAME

Table 1.47. Request Parameters
NameDescriptionTypeExampleRequired

uid

The user for which the information is requested.

String

foo_user

No

start

Date and (optional) time that specifies the start time of the requested data.

String

2012-09-25 16:00:00

No

end

Date and (optional) time that specifies the end time of the requested data (none inclusive).

String

2012-09-25 16:00:00

No

remove-all

Required when uid is not specified, in order to acknowledge multi-user data removal.

Boolean

True [False]

No

1.32. Standard error responses

The following table details standard error responses and their descriptions.

NameDescriptionCode

AccessDenied

Access denied.

403 Forbidden

InternalError

Internal server error.

500 Internal Server Error

NoSuchUser

User does not exist.

404 Not Found

NoSuchBucket

Bucket does not exist.

404 Not Found

NoSuchKey

No such access key.

404 Not Found

Chapter 2. Ceph Object Gateway and the S3 API

As a developer, you can use a RESTful application programing interface (API) that is compatible with the Amazon S3 data access model. You can manage the buckets and objects stored in Red Hat Ceph Storage cluster through the Ceph Object Gateway.

2.1. Prerequisites

  • A running Red Hat Ceph Storage cluster.
  • A RESTful client.

2.2. S3 limitations

Important

The following limitations should be used with caution. There are implications related to your hardware selections, so you should always discuss these requirements with your Red Hat account team.

  • Maximum object size when using Amazon S3: Individual Amazon S3 objects can range in size from a minimum of 0B to a maximum of 5TB. The largest object that can be uploaded in a single PUT is 5GB. For objects larger than 100MB, you should consider using the Multipart Upload capability.
  • Maximum metadata size when using Amazon S3: There is no defined limit on the total size of user metadata that can be applied to an object, but a single HTTP request is limited to 16,000 bytes.
  • The amount of data overhead Red Hat Ceph Storage cluster produces to store S3 objects and metadata: The estimate here is 200-300 bytes plus the length of the object name. Versioned objects consume additional space proportional to the number of versions. Also, transient overhead is produced during multi-part upload and other transactional updates, but these overheads are recovered during garbage collection.

Additional Resources

2.3. Accessing the Ceph Object Gateway with the S3 API

As a developer, you must configure access to the Ceph Object Gateway and the Secure Token Service (STS) before you can start using the Amazon S3 API.

2.3.1. Prerequisites

  • A running Red Hat Ceph Storage cluster.
  • A running Ceph Object Gateway.
  • A RESTful client.

2.3.2. S3 authentication

Requests to the Ceph Object Gateway can be either authenticated or unauthenticated. Ceph Object Gateway assumes unauthenticated requests are sent by an anonymous user. Ceph Object Gateway supports canned ACLs.

For most use cases, clients use existing open source libraries like the Amazon SDK’s AmazonS3Client for Java, and Python Boto. With open source libraries you simply pass in the access key and secret key and the library builds the request header and authentication signature for you. However, you can create requests and sign them too.

Authenticating a request requires including an access key and a base 64-encoded hash-based Message Authentication Code (HMAC) in the request before it is sent to the Ceph Object Gateway server. Ceph Object Gateway uses an S3-compatible authentication approach.

Example

HTTP/1.1
PUT /buckets/bucket/object.mpeg
Host: cname.domain.com
Date: Mon, 2 Jan 2012 00:01:01 +0000
Content-Encoding: mpeg
Content-Length: 9999999

Authorization: AWS ACCESS_KEY:HASH_OF_HEADER_AND_SECRET

In the above example, replace ACCESS_KEY with the value for the access key ID followed by a colon (:). Replace HASH_OF_HEADER_AND_SECRET with a hash of a canonicalized header string and the secret corresponding to the access key ID.

Generate hash of header string and secret

To generate the hash of the header string and secret:

  1. Get the value of the header string.
  2. Normalize the request header string into canonical form.
  3. Generate an HMAC using a SHA-1 hashing algorithm.
  4. Encode the hmac result as base-64.

Normalize header

To normalize the header into canonical form:

  1. Get all content- headers.
  2. Remove all content- headers except for content-type and content-md5.
  3. Ensure the content- header names are lowercase.
  4. Sort the content- headers lexicographically.
  5. Ensure you have a Date header AND ensure the specified date uses GMT and not an offset.
  6. Get all headers beginning with x-amz-.
  7. Ensure that the x-amz- headers are all lowercase.
  8. Sort the x-amz- headers lexicographically.
  9. Combine multiple instances of the same field name into a single field and separate the field values with a comma.
  10. Replace white space and line breaks in header values with a single space.
  11. Remove white space before and after colons.
  12. Append a new line after each header.
  13. Merge the headers back into the request header.

Replace the HASH_OF_HEADER_AND_SECRET with the base-64 encoded HMAC string.

Additional Resources

2.3.3. S3 server-side encryption

The Ceph Object Gateway supports server-side encryption of uploaded objects for the S3 application programing interface (API). Server-side encryption means that the S3 client sends data over HTTP in its unencrypted form, and the Ceph Object Gateway stores that data in the Red Hat Ceph Storage cluster in encrypted form.

Note

Red Hat does NOT support S3 object encryption of Static Large Object (SLO) or Dynamic Large Object (DLO).

Important

To use encryption, client requests MUST send requests over an SSL connection. Red Hat does not support S3 encryption from a client unless the Ceph Object Gateway uses SSL. However, for testing purposes, administrators may disable SSL during testing by setting the rgw_crypt_require_ssl configuration setting to false at runtime, setting it to false in the Ceph configuration file and restarting the gateway instance, or setting it to false in the Ansible configuration files and replaying the Ansible playbooks for the Ceph Object Gateway.

In a production environment, it might not be possible to send encrypted requests over SSL. In such a case, send requests using HTTP with server-side encryption.

For information about how to configure HTTP with server-side encryption, see the Additional Resources section below.

There are two options for the management of encryption keys:

Customer-provided Keys

When using customer-provided keys, the S3 client passes an encryption key along with each request to read or write encrypted data. It is the customer’s responsibility to manage those keys. Customers must remember which key the Ceph Object Gateway used to encrypt each object.

Ceph Object Gateway implements the customer-provided key behavior in the S3 API according to the Amazon SSE-C specification.

Since the customer handles the key management and the S3 client passes keys to the Ceph Object Gateway, the Ceph Object Gateway requires no special configuration to support this encryption mode.

Key Management Service

When using a key management service, the secure key management service stores the keys and the Ceph Object Gateway retrieves them on demand to serve requests to encrypt or decrypt data.

Ceph Object Gateway implements the key management service behavior in the S3 API according to the Amazon SSE-KMS specification.

Important

Currently, the only tested key management implementations are HashiCorp Vault, and OpenStack Barbican. However, OpenStack Barbican is a Technology Preview and is not supported for use in production systems.

2.3.4. S3 access control lists

Ceph Object Gateway supports S3-compatible Access Control Lists (ACL) functionality. An ACL is a list of access grants that specify which operations a user can perform on a bucket or on an object. Each grant has a different meaning when applied to a bucket versus applied to an object:

Table 2.1. User Operations
PermissionBucketObject

READ

Grantee can list the objects in the bucket.

Grantee can read the object.

WRITE

Grantee can write or delete objects in the bucket.

N/A

READ_ACP

Grantee can read bucket ACL.

Grantee can read the object ACL.

WRITE_ACP

Grantee can write bucket ACL.

Grantee can write to the object ACL.

FULL_CONTROL

Grantee has full permissions for object in the bucket.

Grantee can read or write to the object ACL.

2.3.5. Preparing access to the Ceph Object Gateway using S3

You have to follow some pre-requisites on the Ceph Object Gateway node before attempting to access the gateway server.

Warning

DO NOT modify the Ceph configuration file to use port 80 and let Civetweb use the default Ansible configured port of 8080.

Prerequisites

  • Installation of the Ceph Object Gateway software.
  • Root-level access to the Ceph Object Gateway node.

Procedure

  1. As root, open port 8080 on firewall:

    [root@rgw ~]# firewall-cmd --zone=public --add-port=8080/tcp --permanent
    [root@rgw ~]# firewall-cmd --reload
  2. Add a wildcard to the DNS server that you are using for the gateway as mentioned in the Object Gateway Configuration and Administration Guide.

    You can also set up the gateway node for local DNS caching. To do so, execute the following steps:

    1. As root, install and setup dnsmasq:

      [root@rgw ~]# yum install dnsmasq
      [root@rgw ~]# echo "address=/.FQDN_OF_GATEWAY_NODE/IP_OF_GATEWAY_NODE" | tee --append /etc/dnsmasq.conf
      [root@rgw ~]# systemctl start dnsmasq
      [root@rgw ~]# systemctl enable dnsmasq

      Replace IP_OF_GATEWAY_NODE and FQDN_OF_GATEWAY_NODE with the IP address and FQDN of the gateway node.

    2. As root, stop NetworkManager:

      [root@rgw ~]# systemctl stop NetworkManager
      [root@rgw ~]# systemctl disable NetworkManager
    3. As root, set the gateway server’s IP as the nameserver:

      [root@rgw ~]# echo "DNS1=IP_OF_GATEWAY_NODE" | tee --append /etc/sysconfig/network-scripts/ifcfg-eth0
      [root@rgw ~]# echo "IP_OF_GATEWAY_NODE FQDN_OF_GATEWAY_NODE" | tee --append /etc/hosts
      [root@rgw ~]# systemctl restart network
      [root@rgw ~]# systemctl enable network
      [root@rgw ~]# systemctl restart dnsmasq

      Replace IP_OF_GATEWAY_NODE and FQDN_OF_GATEWAY_NODE with the IP address and FQDN of the gateway node.

    4. Verify subdomain requests:

      [user@rgw ~]$ ping mybucket.FQDN_OF_GATEWAY_NODE

      Replace FQDN_OF_GATEWAY_NODE with the FQDN of the gateway node.

      Warning

      Setting up the gateway server for local DNS caching is for testing purposes only. You won’t be able to access outside network after doing this. It is strongly recommended to use a proper DNS server for the Red Hat Ceph Storage cluster and gateway node.

  3. Create the radosgw user for S3 access carefully as mentioned in the Object Gateway Configuration and Administration Guide and copy the generated access_key and secret_key. You will need these keys for S3 access and subsequent bucket management tasks.

2.3.6. Accessing the Ceph Object Gateway using Ruby AWS S3

You can use Ruby programming language along with aws-s3 gem for S3 access. Execute the steps mentioned below on the node used for accessing the Ceph Object Gateway server with Ruby AWS::S3.

Prerequisites

  • User-level access to Ceph Object Gateway.
  • Root-level access to the node accessing the Ceph Object Gateway.
  • Internet access.

Procedure

  1. Install the ruby package:

    [root@dev ~]# yum install ruby
    Note

    The above command will install ruby and it’s essential dependencies like rubygems and ruby-libs. If somehow the command does not install all the dependencies, install them separately.

  2. Install the aws-s3 Ruby package:

    [root@dev ~]# gem install aws-s3
  3. Create a project directory:

    [user@dev ~]$ mkdir ruby_aws_s3
    [user@dev ~]$ cd ruby_aws_s3
  4. Create the connection file:

    [user@dev ~]$ vim conn.rb
  5. Paste the following contents into the conn.rb file:

    Syntax

    #!/usr/bin/env ruby
    
    require 'aws/s3'
    require 'resolv-replace'
    
    AWS::S3::Base.establish_connection!(
            :server            => 'FQDN_OF_GATEWAY_NODE',
            :port           => '8080',
            :access_key_id     => 'MY_ACCESS_KEY',
            :secret_access_key => 'MY_SECRET_KEY'
    )

    Replace FQDN_OF_GATEWAY_NODE with the FQDN of the Ceph Object Gateway node. Replace MY_ACCESS_KEY and MY_SECRET_KEY with the access_key and secret_key that was generated when you created the radosgw user for S3 access as mentioned in the Red Hat Ceph Storage Object Gateway Configuration and Administration Guide.

    Example

    #!/usr/bin/env ruby
    
    require 'aws/s3'
    require 'resolv-replace'
    
    AWS::S3::Base.establish_connection!(
            :server            => 'testclient.englab.pnq.redhat.com',
            :port           => '8080',
            :access_key_id     => '98J4R9P22P5CDL65HKP8',
            :secret_access_key => '6C+jcaP0dp0+FZfrRNgyGA9EzRy25pURldwje049'
    )

    Save the file and exit the editor.

  6. Make the file executable:

    [user@dev ~]$ chmod +x conn.rb
  7. Run the file:

    [user@dev ~]$ ./conn.rb | echo $?

    If you have provided the values correctly in the file, the output of the command will be 0.

  8. Create a new file for creating a bucket:

    [user@dev ~]$ vim create_bucket.rb

    Paste the following contents into the file:

    #!/usr/bin/env ruby
    
    load 'conn.rb'
    
    AWS::S3::Bucket.create('my-new-bucket1')

    Save the file and exit the editor.

  9. Make the file executable:

    [user@dev ~]$ chmod +x create_bucket.rb
  10. Run the file:

    [user@dev ~]$ ./create_bucket.rb

    If the output of the command is true it would mean that bucket my-new-bucket1 was created successfully.

  11. Create a new file for listing owned buckets:

    [user@dev ~]$ vim list_owned_buckets.rb

    Paste the following content into the file:

    #!/usr/bin/env ruby
    
    load 'conn.rb'
    
    AWS::S3::Service.buckets.each do |bucket|
            puts "{bucket.name}\t{bucket.creation_date}"
    end

    Save the file and exit the editor.

  12. Make the file executable:

    [user@dev ~]$ chmod +x list_owned_buckets.rb
  13. Run the file:

    [user@dev ~]$ ./list_owned_buckets.rb

    The output should look something like this:

    my-new-bucket1 2020-01-21 10:33:19 UTC
  14. Create a new file for creating an object:

    [user@dev ~]$ vim create_object.rb

    Paste the following contents into the file:

    #!/usr/bin/env ruby
    
    load 'conn.rb'
    
    AWS::S3::S3Object.store(
            'hello.txt',
            'Hello World!',
            'my-new-bucket1',
            :content_type => 'text/plain'
    )

    Save the file and exit the editor.

  15. Make the file executable:

    [user@dev ~]$ chmod +x create_object.rb
  16. Run the file:

    [user@dev ~]$ ./create_object.rb

    This will create a file hello.txt with the string Hello World!.

  17. Create a new file for listing a bucket’s content:

    [user@dev ~]$ vim list_bucket_content.rb

    Paste the following content into the file:

    #!/usr/bin/env ruby
    
    load 'conn.rb'
    
    new_bucket = AWS::S3::Bucket.find('my-new-bucket1')
    new_bucket.each do |object|
            puts "{object.key}\t{object.about['content-length']}\t{object.about['last-modified']}"
    end

    Save the file and exit the editor.

  18. Make the file executable.

    [user@dev ~]$ chmod +x list_bucket_content.rb
  19. Run the file:

    [user@dev ~]$ ./list_bucket_content.rb

    The output will look something like this:

    hello.txt    12    Fri, 22 Jan 2020 15:54:52 GMT
  20. Create a new file for deleting an empty bucket:

    [user@dev ~]$ vim del_empty_bucket.rb

    Paste the following contents into the file:

    #!/usr/bin/env ruby
    
    load 'conn.rb'
    
    AWS::S3::Bucket.delete('my-new-bucket1')

    Save the file and exit the editor.

  21. Make the file executable:

    [user@dev ~]$ chmod +x del_empty_bucket.rb
  22. Run the file:

    [user@dev ~]$ ./del_empty_bucket.rb | echo $?

    If the bucket is successfully deleted, the command will return 0 as output.

    Note

    Edit the create_bucket.rb file to create empty buckets, for example: my-new-bucket4, my-new-bucket5. Next, edit the above mentioned del_empty_bucket.rb file accordingly before trying to delete empty buckets.

  23. Create a new file for deleting non-empty buckets:

    [user@dev ~]$ vim del_non_empty_bucket.rb

    Paste the following contents into the file:

    #!/usr/bin/env ruby
    
    load 'conn.rb'
    
    AWS::S3::Bucket.delete('my-new-bucket1', :force => true)

    Save the file and exit the editor.

  24. Make the file executable:

    [user@dev ~]$ chmod +x del_non_empty_bucket.rb
  25. Run the file:

    [user@dev ~]$ ./del_non_empty_bucket.rb | echo $?

    If the bucket is successfully deleted, the command will return 0 as output.

  26. Create a new file for deleting an object:

    [user@dev ~]$ vim delete_object.rb

    Paste the following contents into the file:

    #!/usr/bin/env ruby
    
    load 'conn.rb'
    
    AWS::S3::S3Object.delete('hello.txt', 'my-new-bucket1')

    Save the file and exit the editor.

  27. Make the file executable:

    [user@dev ~]$ chmod +x delete_object.rb
  28. Run the file:

    [user@dev ~]$ ./delete_object.rb

    This will delete the object hello.txt.

2.3.7. Accessing the Ceph Object Gateway using Ruby AWS SDK

You can use the Ruby programming language along with aws-sdk gem for S3 access. Execute the steps mentioned below on the node used for accessing the Ceph Object Gateway server with Ruby AWS::SDK.

Prerequisites

  • User-level access to Ceph Object Gateway.
  • Root-level access to the node accessing the Ceph Object Gateway.
  • Internet access.

Procedure

  1. Install the ruby package:

    [root@dev ~]# yum install ruby
    Note

    The above command will install ruby and it’s essential dependencies like rubygems and ruby-libs. If somehow the command does not install all the dependencies, install them separately.

  2. Install the aws-sdk Ruby package:

    [root@dev ~]# gem install aws-sdk
  3. Create a project directory:

    [user@dev ~]$ mkdir ruby_aws_sdk
    [user@dev ~]$ cd ruby_aws_sdk
  4. Create the connection file:

    [user@ruby_aws_sdk]$ vim conn.rb
  5. Paste the following contents into the conn.rb file:

    Syntax

    #!/usr/bin/env ruby
    
    require 'aws-sdk'
    require 'resolv-replace'
    
    Aws.config.update(
            endpoint: 'http://FQDN_OF_GATEWAY_NODE:8080',
            access_key_id: 'MY_ACCESS_KEY',
            secret_access_key: 'MY_SECRET_KEY',
            force_path_style: true,
            region: 'us-east-1'
    )

    Replace FQDN_OF_GATEWAY_NODE with the FQDN of the Ceph Object Gateway node. Replace MY_ACCESS_KEY and MY_SECRET_KEY with the access_key and secret_key that was generated when you created the radosgw user for S3 access as mentioned in the Red Hat Ceph Storage Object Gateway Configuration and Administration Guide.

    Example

    #!/usr/bin/env ruby
    
    require 'aws-sdk'
    require 'resolv-replace'
    
    Aws.config.update(
            endpoint: 'http://testclient.englab.pnq.redhat.com:8080',
            access_key_id: '98J4R9P22P5CDL65HKP8',
            secret_access_key: '6C+jcaP0dp0+FZfrRNgyGA9EzRy25pURldwje049',
            force_path_style: true,
            region: 'us-east-1'
    )

    Save the file and exit the editor.

  6. Make the file executable:

    [user@ruby_aws_sdk]$ chmod +x conn.rb
  7. Run the file:

    [user@ruby_aws_sdk]$ ./conn.rb | echo $?

    If you have provided the values correctly in the file, the output of the command will be 0.

  8. Create a new file for creating a bucket:

    [user@ruby_aws_sdk]$ vim create_bucket.rb

    Paste the following contents into the file:

    Syntax

    #!/usr/bin/env ruby
    
    load 'conn.rb'
    
    s3_client = Aws::S3::Client.new
    s3_client.create_bucket(bucket: 'my-new-bucket2')

    Save the file and exit the editor.

  9. Make the file executable:

    [user@ruby_aws_sdk]$ chmod +x create_bucket.rb
  10. Run the file:

    [user@ruby_aws_sdk]$ ./create_bucket.rb

    If the output of the command is true, this means that bucket my-new-bucket2 was created successfully.

  11. Create a new file for listing owned buckets:

    [user@ruby_aws_sdk]$ vim list_owned_buckets.rb

    Paste the following content into the file:

    #!/usr/bin/env ruby
    
    load 'conn.rb'
    
    s3_client = Aws::S3::Client.new
    s3_client.list_buckets.buckets.each do |bucket|
            puts "{bucket.name}\t{bucket.creation_date}"
    end

    Save the file and exit the editor.

  12. Make the file executable:

    [user@ruby_aws_sdk]$ chmod +x list_owned_buckets.rb
  13. Run the file:

    [user@ruby_aws_sdk]$ ./list_owned_buckets.rb

    The output should look something like this:

    my-new-bucket2 2022-04-21 10:33:19 UTC
  14. Create a new file for creating an object:

    [user@ruby_aws_sdk]$ vim create_object.rb

    Paste the following contents into the file:

    #!/usr/bin/env ruby
    
    load 'conn.rb'
    
    s3_client = Aws::S3::Client.new
    s3_client.put_object(
            key: 'hello.txt',
            body: 'Hello World!',
            bucket: 'my-new-bucket2',
            content_type: 'text/plain'
    )

    Save the file and exit the editor.

  15. Make the file executable:

    [user@ruby_aws_sdk]$ chmod +x create_object.rb
  16. Run the file:

    [user@ruby_aws_sdk]$ ./create_object.rb

    This will create a file hello.txt with the string Hello World!.

  17. Create a new file for listing a bucket’s content:

    [user@ruby_aws_sdk]$ vim list_bucket_content.rb

    Paste the following content into the file:

    #!/usr/bin/env ruby
    
    load 'conn.rb'
    
    s3_client = Aws::S3::Client.new
    s3_client.list_objects(bucket: 'my-new-bucket2').contents.each do |object|
            puts "{object.key}\t{object.size}"
    end

    Save the file and exit the editor.

  18. Make the file executable.

    [user@ruby_aws_sdk]$ chmod +x list_bucket_content.rb
  19. Run the file:

    [user@ruby_aws_sdk]$ ./list_bucket_content.rb

    The output will look something like this:

    hello.txt    12    Fri, 22 Apr 2022 15:54:52 GMT
  20. Create a new file for deleting an empty bucket:

    [user@ruby_aws_sdk]$ vim del_empty_bucket.rb

    Paste the following contents into the file:

    #!/usr/bin/env ruby
    
    load 'conn.rb'
    
    s3_client = Aws::S3::Client.new
    s3_client.delete_bucket(bucket: 'my-new-bucket2')

    Save the file and exit the editor.

  21. Make the file executable:

    [user@ruby_aws_sdk]$ chmod +x del_empty_bucket.rb
  22. Run the file:

    [user@ruby_aws_sdk]$ ./del_empty_bucket.rb | echo $?

    If the bucket is successfully deleted, the command will return 0 as output.

    Note

    Edit the create_bucket.rb file to create empty buckets, for example: my-new-bucket6, my-new-bucket7. Next, edit the above mentioned del_empty_bucket.rb file accordingly before trying to delete empty buckets.

  23. Create a new file for deleting a non-empty bucket:

    [user@ruby_aws_sdk]$ vim del_non_empty_bucket.rb

    Paste the following contents into the file:

    #!/usr/bin/env ruby
    
    load 'conn.rb'
    
    s3_client = Aws::S3::Client.new
    Aws::S3::Bucket.new('my-new-bucket2', client: s3_client).clear!
    s3_client.delete_bucket(bucket: 'my-new-bucket2')

    Save the file and exit the editor.

  24. Make the file executable:

    [user@ruby_aws_sdk]$ chmod +x del_non_empty_bucket.rb
  25. Run the file:

    [user@ruby_aws_sdk]$ ./del_non_empty_bucket.rb | echo $?

    If the bucket is successfully deleted, the command will return 0 as output.

  26. Create a new file for deleting an object:

    [user@ruby_aws_sdk]$ vim delete_object.rb

    Paste the following contents into the file:

    #!/usr/bin/env ruby
    
    load 'conn.rb'
    
    s3_client = Aws::S3::Client.new
    s3_client.delete_object(key: 'hello.txt', bucket: 'my-new-bucket2')

    Save the file and exit the editor.

  27. Make the file executable:

    [user@ruby_aws_sdk]$ chmod +x delete_object.rb
  28. Run the file:

    [user@ruby_aws_sdk]$ ./delete_object.rb

    This will delete the object hello.txt.

2.3.8. Accessing the Ceph Object Gateway using PHP

You can use PHP scripts for S3 access. This procedure provides some example PHP scripts to do various tasks, such as deleting a bucket or an object.

Important

The examples given below are tested against php v5.4.16 and aws-sdk v2.8.24. DO NOT use the latest version of aws-sdk for php as it requires php >= 5.5+.php 5.5 is not available in the default repositories of RHEL 7. If you want to use php 5.5, you will have to enable epel and other third party repositories. Also, the configuration options for php 5.5 and latest version of aws-sdk are different.

Prerequisites

  • Root-level access to a development workstation.
  • Internet access.

Procedure

  1. Install the php package:

    [root@dev ~]# yum install php
  2. Download the zip archive of aws-sdk for PHP and extract it.
  3. Create a project directory:

    [user@dev ~]$ mkdir php_s3
    [user@dev ~]$ cd php_s3
  4. Copy the extracted aws directory to the project directory. For example:

    [user@php_s3]$ cp -r ~/Downloads/aws/ ~/php_s3/
  5. Create the connection file:

    [user@php_s3]$ vim conn.php
  6. Paste the following contents in the conn.php file:

    Syntax

    <?php
    define('AWS_KEY', 'MY_ACCESS_KEY');
    define('AWS_SECRET_KEY', 'MY_SECRET_KEY');
    define('HOST', 'FQDN_OF_GATEWAY_NODE');
    define('PORT', '8080');
    
    // require the AWS SDK for php library
    require '/PATH_TO_AWS/aws-autoloader.php';
    
    use Aws\S3\S3Client;
    
    // Establish connection with host using S3 Client
    client = S3Client::factory(array(
        'base_url' => HOST,
        'port' => PORT,
        'key'      => AWS_KEY,
        'secret'   => AWS_SECRET_KEY
    ));
    ?>

    Replace FQDN_OF_GATEWAY_NODE with the FQDN of the gateway node. Replace MY_ACCESS_KEY and MY_SECRET_KEY with the access_key and secret_key that was generated when creating the radosgw user for S3 access as mentioned in the Red Hat Ceph Storage Object Gateway Configuration and Administration Guide. Replace PATH_TO_AWS with the absolute path to the extracted aws directory that you copied to the php project directory.

    Save the file and exit the editor.

  7. Run the file:

    [user@php_s3]$ php -f conn.php | echo $?

    If you have provided the values correctly in the file, the output of the command will be 0.

  8. Create a new file for creating a bucket:

    [user@php_s3]$ vim create_bucket.php

    Paste the following contents into the new file:

    Syntax

    <?php
    
    include 'conn.php';
    
    client->createBucket(array('Bucket' => 'my-new-bucket3'));
    
    ?>

    Save the file and exit the editor.

  9. Run the file:

    [user@php_s3]$ php -f create_bucket.php
  10. Create a new file for listing owned buckets:

    [user@php_s3]$ vim list_owned_buckets.php

    Paste the following content into the file:

    Syntax

    <?php
    
    include 'conn.php';
    
    blist = client->listBuckets();
    echo "Buckets belonging to " . blist['Owner']['ID'] . ":\n";
    foreach (blist['Buckets'] as b) {
        echo "{b['Name']}\t{b['CreationDate']}\n";
    }
    
    ?>

    Save the file and exit the editor.

  11. Run the file:

    [user@php_s3]$ php -f list_owned_buckets.php

    The output should look similar to this:

    my-new-bucket3 2022-04-21 10:33:19 UTC
  12. Create an object by first creating a source file named hello.txt:

    [user@php_s3]$ echo "Hello World!" > hello.txt
  13. Create a new php file:

    [user@php_s3]$ vim create_object.php

    Paste the following contents into the file:

    Syntax

    <?php
    
    include 'conn.php';
    
    key         = 'hello.txt';
    source_file = './hello.txt';
    acl         = 'private';
    bucket      = 'my-new-bucket3';
    client->upload(bucket, key, fopen(source_file, 'r'), acl);
    
    ?>

    Save the file and exit the editor.

  14. Run the file:

    [user@php_s3]$ php -f create_object.php

    This will create the object hello.txt in bucket my-new-bucket3.

  15. Create a new file for listing a bucket’s content:

    [user@php_s3]$ vim list_bucket_content.php

    Paste the following content into the file:

    Syntax

    <?php
    
    include 'conn.php';
    
    o_iter = client->getIterator('ListObjects', array(
        'Bucket' => 'my-new-bucket3'
    ));
    foreach (o_iter as o) {
        echo "{o['Key']}\t{o['Size']}\t{o['LastModified']}\n";
    }
    ?>

    Save the file and exit the editor.

  16. Run the file:

    [user@php_s3]$ php -f list_bucket_content.php

    The output will look similar to this:

    hello.txt    12    Fri, 22 Apr 2022 15:54:52 GMT
  17. Create a new file for deleting an empty bucket:

    [user@php_s3]$ vim del_empty_bucket.php

    Paste the following contents into the file:

    Syntax

    <?php
    
    include 'conn.php';
    
    client->deleteBucket(array('Bucket' => 'my-new-bucket3'));
    ?>

    Save the file and exit the editor.

  18. Run the file:

    [user@php_s3]$ php -f del_empty_bucket.php | echo $?

    If the bucket is successfully deleted, the command will return 0 as output.

    Note

    Edit the create_bucket.php file to create empty buckets, for example: my-new-bucket4, my-new-bucket5. Next, edit the above mentioned del_empty_bucket.php file accordingly before trying to delete empty buckets.

    Important

    Deleting a non-empty bucket is currently not supported in PHP 2 and newer versions of aws-sdk.

  19. Create a new file for deleting an object:

    [user@php_s3]$ vim delete_object.php

    Paste the following contents into the file:

    Syntax

    <?php
    
    include 'conn.php';
    
    client->deleteObject(array(
        'Bucket' => 'my-new-bucket3',
        'Key'    => 'hello.txt',
    ));
    ?>

    Save the file and exit the editor.

  20. Run the file:

    [user@php_s3]$ php -f delete_object.php

    This will delete the object hello.txt.

2.3.9. Accessing the Ceph Object Gateway using AWS CLI

You can use the AWS CLI for S3 access. This procedure provides steps for installing AWS CLI and some example commands to perform various tasks, such as deleting an object from an MFA-Delete enabled bucket.

Prerequisites

  • User-level access to Ceph Object Gateway.
  • Root-level access to a development workstation.
  • A multi-factor authentication (MFA) TOTP token was created using radosgw-admin mfa create

Procedure

  1. Install the awscli package:

    [user@dev]$ pip3 install --user awscli
  2. Configure awscli to access Ceph Object Storage using AWS CLI:

    Syntax

    aws configure --profile=MY_PROFILE_NAME
    
    AWS Access Key ID [None]: MY_ACCESS_KEY
    AWS Secret Access Key [None]: MY_SECRET_KEY
    Default region name [None]:
    Default output format [None]:

    Replace MY_PROFILE_NAME with the name you want to use to identify this profile. Replace MY_ACCESS_KEY and MY_SECRET_KEY with the access_key and secret_key that was generated when creating the radosgw user for S3 access as mentioned in the Red Hat Ceph Storage Object Gateway Configuration and Administration Guide.

    Example

    [user@dev]$ aws configure --profile=ceph
    
    AWS Access Key ID [None]: 12345
    AWS Secret Access Key [None]: 67890
    Default region name [None]:
    Default output format [None]:

  3. Create an alias to point to the FQDN of your Ceph Object Gateway node:

    Syntax

    alias aws="aws --endpoint-url=http://FQDN_OF_GATEWAY_NODE:8080"

    Replace FQDN_OF_GATEWAY_NODE with the FQDN of the Ceph Object Gateway node.

    Example

    [user@dev]$ alias aws="aws --endpoint-url=http://testclient.englab.pnq.redhat.com:8080"

  4. Create a new bucket:

    Syntax

    aws --profile=MY_PROFILE_NAME s3api create-bucket --bucket BUCKET_NAME

    Replace MY_PROFILE_NAME with the name you created to use this profile. Replace BUCKET_NAME with a name for your new bucket.

    Example

    [user@dev]$ aws --profile=ceph s3api create-bucket --bucket mybucket

  5. List owned buckets:

    Syntax

    aws --profile=MY_PROFILE_NAME s3api list-buckets

    Replace MY_PROFILE_NAME with the name you created to use this profile.

    Example

    [user@dev]$ aws --profile=ceph s3api list-buckets
    {
        "Buckets": [
            {
                "Name": "mybucket",
                "CreationDate": "2021-08-31T16:46:15.257Z"
            }
        ],
        "Owner": {
            "DisplayName": "User",
            "ID": "user"
        }
    }

  6. Configure a bucket for MFA-Delete:

    Syntax

    aws --profile=MY_PROFILE_NAME s3api put-bucket-versioning --bucket BUCKET_NAME --versioning-configuration '{"Status":"Enabled","MFADelete":"Enabled"}' --mfa 'TOTP_SERIAL TOTP_PIN'

    • Replace MY_PROFILE_NAME with the name you created to use this profile.
    • Replace BUCKET_NAME with the name of your new bucket.
    • Replace TOTP_SERIAL with the string the represents the ID for the TOTP token and replace TOTP_PIN with the current pin displayed on your MFA authentication device.
    • The TOTP_SERIAL is the string that was specified when you created the radosgw user for S3.
    • See the Creating a new multi-factor authentication TOTP token section of the Red Hat Ceph Storage Object Gateway Configuration and Administration Guide for more details on creating a MFA TOTP token.
    • See the Creating a seed for multi-factor authentication using oathtool section in the Red Hat Ceph Storage Developer Guide for details on creating a MFA seed with oathtool.

      Example

      [user@dev]$ aws --profile=ceph s3api put-bucket-versioning --bucket mybucket --versioning-configuration '{"Status":"Enabled","MFADelete":"Enabled"}' --mfa 'MFAtest 232009'

  7. View MFA-Delete status of the bucket versioning state:

    Syntax

    aws --profile=MY_PROFILE_NAME s3api get-bucket-versioning --bucket BUCKET_NAME

    Replace MY_PROFILE_NAME with the name you created to use this profile. Replace BUCKET_NAME with the name of your new bucket.

    Example

    [user@dev]$ aws --profile=ceph s3api get-bucket-versioning --bucket mybucket
    {
        "Status": "Enabled",
        "MFADelete": "Enabled"
    }

  8. Add an object to the MFA-Delete enabled bucket:

    Syntax

    aws --profile=MY_PROFILE_NAME s3api put-object --bucket BUCKET_NAME --key OBJECT_KEY --body LOCAL_FILE

    • Replace MY_PROFILE_NAME with the name you created to use this profile.
    • Replace BUCKET_NAME with the name of your new bucket.
    • Replace OBJECT_KEY with the name that will uniquely identify the object in a bucket.
    • Replace LOCAL_FILE with the name of the local file to upload.

      Example

      [user@dev]$ aws --profile=ceph s3api put-object --bucket mybucket --key example --body testfile
      {
          "ETag": "\"5679b828547a4b44cfb24a23fd9bb9d5\"",
          "VersionId": "3VyyYPTEuIofdvMPWbr1znlOu7lJE3r"
      }

  9. List the object versions for a specific object:

    Syntax

    aws --profile=MY_PROFILE_NAME s3api list-object-versions --bucket BUCKET_NAME --key OBJEC_KEY]

    • Replace MY_PROFILE_NAME with the name you created to use this profile.
    • Replace BUCKET_NAME with the name of your new bucket.
    • Replace OBJECT_KEY with the name that was specified to uniquely identify the object in a bucket.

      Example

      [user@dev]$ aws --profile=ceph s3api list-object-versions --bucket mybucket --key example
      {
          "IsTruncated": false,
          "KeyMarker": "example",
          "VersionIdMarker": "",
          "Versions": [
              {
                  "ETag": "\"5679b828547a4b44cfb24a23fd9bb9d5\"",
                  "Size": 196,
                  "StorageClass": "STANDARD",
                  "Key": "example",
                  "VersionId": "3VyyYPTEuIofdvMPWbr1znlOu7lJE3r",
                  "IsLatest": true,
                  "LastModified": "2021-08-31T17:48:45.484Z",
                  "Owner": {
                      "DisplayName": "User",
                      "ID": "user"
                  }
              }
          ],
          "Name": "mybucket",
          "Prefix": "",
          "MaxKeys": 1000,
          "EncodingType": "url"
      }

  10. Delete an object in an MFA-Delete enabled bucket:

    Syntax

    aws --profile=MY_PROFILE_NAME s3api delete-object --bucket BUCKET_NAME --key OBJECT_KEY --version-id VERSION_ID --mfa 'TOTP_SERIAL TOTP_PIN'

    • Replace MY_PROFILE_NAME with the name you created to use this profile.
    • Replace BUCKET_NAME with the name of your bucket that contains the object to delete.
    • Replace OBJECT_KEY with the name that uniquely identifies the object in a bucket.
    • Replace VERSION_ID with the VersionID of the specific version of the object you want to delete.
    • Replace TOTP_SERIAL with the string that represents the ID for the TOTP token and TOTP_PIN to the current pin displayed on your MFA authentication device.

      Example

      [user@dev]$ aws --profile=ceph s3api delete-object --bucket mybucket --key example --version-id 3VyyYPTEuIofdvMPWbr1znlOu7lJE3r --mfa 'MFAtest 420797'
      {
          "VersionId": "3VyyYPTEuIofdvMPWbr1znlOu7lJE3r"
      }

      If the MFA token is not included, the request fails with the error shown below.

      Example

      [user@dev]$ aws --profile=ceph s3api delete-object --bucket mybucket --key example --version-id 3VyyYPTEuIofdvMPWbr1znlOu7lJE3r
      An error occurred (AccessDenied) when calling the DeleteObject operation: Unknown

  11. List object versions to verify object was deleted from MFA-Delete enabled bucket:

    Syntax

    aws --profile=MY_PROFILE_NAME s3api list-object-versions --bucket BUCKET_NAME --key OBJECT_KEY

    • Replace MY_PROFILE_NAME with the name you created to use this profile.
    • Replace BUCKET_NAME with the name of your bucket.
    • Replace OBJECT_KEY with the name that uniquely identifies the object in a bucket.

      Example

      [user@dev]$ aws --profile=ceph s3api list-object-versions --bucket mybucket --key example
      {
          "IsTruncated": false,
          "KeyMarker": "example",
          "VersionIdMarker": "",
          "Name": "mybucket",
          "Prefix": "",
          "MaxKeys": 1000,
          "EncodingType": "url"
      }

2.3.10. Creating a seed for multi-factor authentication using the oathtool command

To set up multi-factor authentication (MFA), you must create a secret seed for use by the time-based one time password (TOTP) generator and the back-end MFA system. You can use oathtool to generate the hexadecimal seed and optionally qrencode to create a QR code to import the token into your MFA device.

Prerequisites

  • A Linux system.
  • Access to the command line shell.
  • root or sudo access to the Linux system.

Procedure

  1. Install the oathtool package:

    [root@dev]# dnf install oathtool
  2. Install the qrencode package:

    [root@dev]# dnf install qrencode
  3. Generate a 30 character seed from the urandom Linux device file and store it in the shell variable SEED:

    Example

    [user@dev]$ SEED=$(head -10 /dev/urandom | sha512sum | cut -b 1-30)

  4. Print the seed by running echo on the SEED variable:

    Example

    [user@dev]$ echo $SEED
    BA6GLJBJIKC3D7W7YFYXXAQ7

  5. Feed the SEED into the oathtool command:

    Syntax

    oathtool -v -d6 $SEED

    Example

    [user@dev]$ oathtool -v -d6 $SEED
    Hex secret: 083c65a4294285b1fedfc1717b821f
    Base32 secret: BA6GLJBJIKC3D7W7YFYXXAQ7
    Digits: 6
    Window size: 0
    Start counter: 0x0 (0)
    
    823182

    Note

    The base32 secret is needed to add a token to the authenticator application on your MFA device. You can either use the QR code to import the token into the authenticator application or use the base32 secret manually add it.

  6. Optional: Create a QR code image file to add the token to the authenticator:

    Syntax

    qrencode -o /tmp/user.png 'otpauth://totp/TOTP_SERIAL?secret=_BASE32_SECRET'

    Replace TOTP_SERIAL with the string that represents the ID for the (TOTP) token and BASE32_SECRET with the Base32 secret generated by oathtool.

    Example

    [user@dev]$ qrencode -o /tmp/user.png 'otpauth://totp/MFAtest?secret=BA6GLJBJIKC3D7W7YFYXXAQ7'

  7. Scan the generated QR code image file to add the token to the authenticator application on your MFA device.
  8. Create the multi-factor authentication TOTP token for the user using the radowgw-admin command.

Additional Resources

2.3.11. Secure Token Service

The Amazon Web Services' Secure Token Service (STS) returns a set of temporary security credentials for authenticating users. The Ceph Object Gateway implements a subset of the STS application programming interfaces (APIs) to provide temporary credentials for identity and access management (IAM). Using these temporary credentials authenticates S3 calls by utilizing the STS engine in the Ceph Object Gateway. You can restrict temporary credentials even further by using an IAM policy, which is a parameter passed to the STS APIs.

Additional Resources

2.3.11.1. The Secure Token Service application programming interfaces

The Ceph Object Gateway implements the following Secure Token Service (STS) application programming interfaces (APIs):

AssumeRole

This API returns a set of temporary credentials for cross-account access. These temporary credentials allow for both, permission policies attached with Role and policies attached with AssumeRole API. The RoleArn and the RoleSessionName request parameters are required, but the other request parameters are optional.

RoleArn
Description
The role to assume for the Amazon Resource Name (ARN) with a length of 20 to 2048 characters.
Type
String
Required
Yes
RoleSessionName
Description
Identifying the role session name to assume. The role session name can uniquely identify a session when different principals or different reasons assume a role. This parameter’s value has a length of 2 to 64 characters. The =, ,, ., @, and - characters are allowed, but no spaces allowed.
Type
String
Required
Yes
Policy
Description
An identity and access management policy (IAM) in a JSON format for use in an inline session. This parameter’s value has a length of 1 to 2048 characters.
Type
String
Required
No
DurationSeconds
Description
The duration of the session in seconds, with a minimum value of 900 seconds to a maximum value of 43200 seconds. The default value is 3600 seconds.
Type
Integer
Required
No
ExternalId
Description
When assuming a role for another account, provide the unique external identifier if available. This parameter’s value has a length of 2 to 1224 characters.
Type
String
Required
No
SerialNumber
Description
A user’s identification number from their associated multi-factor authentication (MFA) device. The parameter’s value can be the serial number of a hardware device or a virtual device, with a length of 9 to 256 characters.
Type
String
Required
No
TokenCode
Description
The value generated from the multi-factor authentication (MFA) device, if the trust policy requires a MFA. If a MFA device is required, and if this parameter’s value is empty or expired, then AssumeRole call returns an "access denied" error message. This parameter’s value has a fixed length of 6 characters.
Type
String
Required
No

AssumeRoleWithWebIdentity

This API returns a set of temporary credentials for users who have been authenticated by an application, such as OpenID Connect or OAuth 2.0 Identity Provider. The RoleArn and the RoleSessionName request parameters are required, but the other request parameters are optional.

RoleArn
Description
The role to assume for the Amazon Resource Name (ARN) with a length of 20 to 2048 characters.
Type
String
Required
Yes
RoleSessionName
Description
Identifying the role session name to assume. The role session name can uniquely identify a session when different principals or different reasons assume a role. This parameter’s value has a length of 2 to 64 characters. The =, ,, ., @, and - characters are allowed, but no spaces allowed.
Type
String
Required
Yes
Policy
Description
An identity and access management policy (IAM) in a JSON format for use in an inline session. This parameter’s value has a length of 1 to 2048 characters.
Type
String
Required
No
DurationSeconds
Description
The duration of the session in seconds, with a minimum value of 900 seconds to a maximum value of 43200 seconds. The default value is 3600 seconds.
Type
Integer
Required
No
ProviderId
Description
The fully qualified host component of the domain name from the identity provider. This parameter’s value is only valid for OAuth 2.0 access tokens, with a length of 4 to 2048 characters.
Type
String
Required
No
WebIdentityToken
Description
The OpenID Connect identity token or OAuth 2.0 access token provided from an identity provider. This parameter’s value has a length of 4 to 2048 characters.
Type
String
Required
No

Additional Resources

2.3.11.2. Configuring the Secure Token Service

Configure the Secure Token Service (STS) for use with the Ceph Object Gateway using Ceph Ansible.

Note

The S3 and STS APIs co-exist in the same namespace, and both can be accessed from the same endpoint in the Ceph Object Gateway.

Prerequisites

  • A Ceph Ansible administration node.
  • A running Red Hat Ceph Storage cluster.
  • A running Ceph Object Gateway.

Procedure

  1. Open for editing the group_vars/rgws.yml file.

    1. Add the following lines:

      rgw_sts_key = STS_KEY
      rgw_s3_auth_use_sts = true

      Replace:

      • STS_KEY with the key used to encrypted the session token.
  2. Save the changes to the group_vars/rgws.yml file.
  3. Rerun the appropriate Ceph Ansible playbook:

    1. Bare-metal deployments:

      [user@admin ceph-ansible]$ ansible-playbook site.yml --limit rgws
    2. Container deployments:

      [user@admin ceph-ansible]$ ansible-playbook site-docker.yml --limit rgws

Additional Resources

2.3.11.3. Creating a user for an OpenID Connect provider

To establish trust between the Ceph Object Gateway and the OpenID Connect Provider create a user entity and a role trust policy.

Prerequisites

  • User-level access to the Ceph Object Gateway node.

Procedure

  1. Create a new Ceph user:

    Syntax

    radosgw-admin --uid USER_NAME --display-name "DISPLAY_NAME" --access_key USER_NAME --secret SECRET user create

    Example

    [user@rgw ~]$ radosgw-admin --uid TESTER --display-name "TestUser" --access_key TESTER --secret test123 user create

  2. Configure the Ceph user capabilities:

    Syntax

    radosgw-admin caps add --uid="USER_NAME" --caps="oidc-provider=*"

    Example

    [user@rgw ~]$ radosgw-admin caps add --uid="TESTER" --caps="oidc-provider=*"

  3. Add a condition to the role trust policy using the Secure Token Service (STS) API:

    Syntax

    "{\"Version\":\"2020-01-17\",\"Statement\":[{\"Effect\":\"Allow\",\"Principal\":{\"Federated\":[\"arn:aws:iam:::oidc-provider/IDP_URL\"]},\"Action\":[\"sts:AssumeRoleWithWebIdentity\"],\"Condition\":{\"StringEquals\":{\"IDP_URL:app_id\":\"AUD_FIELD\"\}\}\}\]\}"

    Important

    The app_id in the syntax example above must match the AUD_FIELD field of the incoming token.

Additional Resources

2.3.11.4. Obtaining a thumbprint of an OpenID Connect provider

To get the OpenID Connect provider’s (IDP) configuration document.

Prerequisites

  • Installation of the openssl and curl packages.

Procedure

  1. Get the configuration document from the IDP’s URL:

    Syntax

    curl -k -v \
         -X GET \
         -H "Content-Type: application/x-www-form-urlencoded" \
         "IDP_URL:8000/CONTEXT/realms/REALM/.well-known/openid-configuration" \
       | jq .

    Example

    [user@client ~]$ curl -k -v \
         -X GET \
         -H "Content-Type: application/x-www-form-urlencoded" \
         "http://www.example.com:8000/auth/realms/quickstart/.well-known/openid-configuration" \
       | jq .

  2. Get the IDP certificate:

    Syntax

    curl -k -v \
         -X GET \
         -H "Content-Type: application/x-www-form-urlencoded" \
         "IDP_URL/CONTEXT/realms/REALM/protocol/openid-connect/certs" \
         | jq .

    Example

    [user@client ~]$ curl -k -v \
         -X GET \
         -H "Content-Type: application/x-www-form-urlencoded" \
         "http://www.example.com/auth/realms/quickstart/protocol/openid-connect/certs" \
         | jq .

  3. Copy the result of the "x5c" response from the previous command and paste it into the certificate.crt file. Include —–BEGIN CERTIFICATE—– at the beginning and —–END CERTIFICATE—– at the end.
  4. Get the certificate thumbprint:

    Syntax

    openssl x509 -in CERT_FILE -fingerprint -noout

    Example

    [user@client ~]$ openssl x509 -in certificate.crt -fingerprint -noout
    SHA1 Fingerprint=F7:D7:B3:51:5D:D0:D3:19:DD:21:9A:43:A9:EA:72:7A:D6:06:52:87

  5. Remove all the colons from the SHA1 fingerprint and use this as the input for creating the IDP entity in the IAM request.

Additional Resources

2.3.11.5. Configuring and using STS Lite with Keystone (Technology Preview)

The Amazon Secure Token Service (STS) and S3 APIs co-exist in the same namespace. The STS options can be configured in conjunction with the Keystone options.

Note

Both S3 and STS APIs can be accessed using the same endpoint in Ceph Object Gateway.

Prerequisites

  • Red Hat Ceph Storage 3.2 or higher.
  • A running Ceph Object Gateway.
  • Installation of the Boto Python module, version 3 or higher.

Procedure

  1. Open and edit the group_vars/rgws.yml file with the following options:

    rgw_sts_key = STS_KEY
    rgw_s3_auth_use_sts = true

    Replace:

    • STS_KEY with the key used to encrypted the session token.
  2. Rerun the appropriate Ceph Ansible playbook:

    1. Bare-metal deployments:

      [user@admin ceph-ansible]$ ansible-playbook site.yml --limit rgws
    2. Container deployments:

      [user@admin ceph-ansible]$ ansible-playbook site-docker.yml --limit rgws
  3. Generate the EC2 credentials:

    Example

    [user@osp ~]$ openstack ec2 credentials create
    
    +------------+--------------------------------------------------------+
    | Field      | Value                                                  |
    +------------+--------------------------------------------------------+
    | access     | b924dfc87d454d15896691182fdeb0ef                       |
    | links      | {u'self': u'http://192.168.0.15/identity/v3/users/     |
    |            | 40a7140e424f493d8165abc652dc731c/credentials/          |
    |            | OS-EC2/b924dfc87d454d15896691182fdeb0ef'}              |
    | project_id | c703801dccaf4a0aaa39bec8c481e25a                       |
    | secret     | 6a2142613c504c42a94ba2b82147dc28                       |
    | trust_id   | None                                                   |
    | user_id    | 40a7140e424f493d8165abc652dc731c                       |
    +------------+--------------------------------------------------------+

  4. Use the generated credentials to get back a set of temporary security credentials using GetSessionToken API.

    Example

    import boto3
    
    access_key = b924dfc87d454d15896691182fdeb0ef
    secret_key = 6a2142613c504c42a94ba2b82147dc28
    
    client = boto3.client('sts',
    aws_access_key_id=access_key,
    aws_secret_access_key=secret_key,
    endpoint_url=https://www.example.com/rgw,
    region_name='',
    )
    
    response = client.get_session_token(
        DurationSeconds=43200
    )

  5. Obtaining the temporary credentials can be used for making S3 calls:

    Example

    s3client = boto3.client('s3',
      aws_access_key_id = response['Credentials']['AccessKeyId'],
      aws_secret_access_key = response['Credentials']['SecretAccessKey'],
      aws_session_token = response['Credentials']['SessionToken'],
      endpoint_url=https://www.example.com/s3,
      region_name='')
    
    bucket = s3client.create_bucket(Bucket='my-new-shiny-bucket')
    response = s3client.list_buckets()
    for bucket in response["Buckets"]:
      print "{name}\t{created}".format(
        name = bucket['Name'],
        created = bucket['CreationDate'],
      )

  6. Create a new S3Access role and configure a policy.

    1. Assign a user with administrative CAPS:

      Syntax

      radosgw-admin caps add --uid="USER" --caps="roles=*"

      Example

      [user@client]$ radosgw-admin caps add --uid="gwadmin" --caps="roles=*"

    2. Create the S3Access role:

      Syntax

      radosgw-admin role create --role-name=ROLE_NAME --path=PATH --assume-role-policy-doc=TRUST_POLICY_DOC

      Example

      [user@client]$ radosgw-admin role create --role-name=S3Access --path=/application_abc/component_xyz/ --assume-role-policy-doc=\{\"Version\":\"2012-10-17\",\"Statement\":\[\{\"Effect\":\"Allow\",\"Principal\":\{\"AWS\":\[\"arn:aws:iam:::user/TESTER\"\]\},\"Action\":\[\"sts:AssumeRole\"\]\}\]\}

    3. Attach a permission policy to the S3Access role:

      Syntax

      radosgw-admin role-policy put --role-name=ROLE_NAME --policy-name=POLICY_NAME --policy-doc=PERMISSION_POLICY_DOC

      Example

      [user@client]$ radosgw-admin role-policy put --role-name=S3Access --policy-name=Policy --policy-doc=\{\"Version\":\"2012-10-17\",\"Statement\":\[\{\"Effect\":\"Allow\",\"Action\":\[\"s3:*\"\],\"Resource\":\"arn:aws:s3:::example_bucket\"\}\]\}

    4. Now another user can assume the role of the gwadmin user. For example, the gwuser user can assume the permissions of the gwadmin user.
    5. Make a note of the assuming user’s access_key and secret_key values.

      Example

      [user@client]$ radosgw-admin user info --uid=gwuser | grep -A1 access_key

  7. Use the AssumeRole API call, providing the access_key and secret_key values from the assuming user:

    Example

    import boto3
    
    access_key = 11BS02LGFB6AL6H1ADMW
    secret_key = vzCEkuryfn060dfee4fgQPqFrncKEIkh3ZcdOANY
    
    client = boto3.client('sts',
    aws_access_key_id=access_key,
    aws_secret_access_key=secret_key,
    endpoint_url=https://www.example.com/rgw,
    region_name='',
    )
    
    response = client.assume_role(
    RoleArn='arn:aws:iam:::role/application_abc/component_xyz/S3Access',
    RoleSessionName='Bob',
    DurationSeconds=3600
    )

    Important

    The AssumeRole API requires the S3Access role.

Additional Resources

  • See the Test S3 Access section in the Red Hat Ceph Storage Object Gateway Guide for more information on installing the Boto Python module.
  • See the Create a User section in the Red Hat Ceph Storage Object Gateway Guide for more information.
2.3.11.6. Working around the limitations of using STS Lite with Keystone (Technology Preview)

A limitation with Keystone is that it does not supports STS requests. Another limitation is the payload hash is not included with the request. To work around these two limitations the Boto authentication code must be modified.

Prerequisites

  • A running Red Hat Ceph Storage cluster, version 3.2 or higher.
  • A running Ceph Object Gateway.
  • Installation of Boto Python module, version 3 or higher.

Procedure

  1. Open and edit Boto’s auth.py file.

    1. Add the following four lines to the code block:

      class SigV4Auth(BaseSigner):
        """
        Sign a request with Signature V4.
        """
        REQUIRES_REGION = True
      
        def __init__(self, credentials, service_name, region_name):
            self.credentials = credentials
            # We initialize these value here so the unit tests can have
            # valid values.  But these will get overriden in ``add_auth``
            # later for real requests.
            self._region_name = region_name
            if service_name == 'sts': 1
                self._service_name = 's3' 2
            else: 3
                self._service_name = service_name 4
    2. Add the following two lines to the code block:

      def _modify_request_before_signing(self, request):
              if 'Authorization' in request.headers:
                  del request.headers['Authorization']
              self._set_necessary_date_headers(request)
              if self.credentials.token:
                  if 'X-Amz-Security-Token' in request.headers:
                      del request.headers['X-Amz-Security-Token']
                  request.headers['X-Amz-Security-Token'] = self.credentials.token
      
              if not request.context.get('payload_signing_enabled', True):
                  if 'X-Amz-Content-SHA256' in request.headers:
                      del request.headers['X-Amz-Content-SHA256']
                  request.headers['X-Amz-Content-SHA256'] = UNSIGNED_PAYLOAD 1
              else: 2
                  request.headers['X-Amz-Content-SHA256'] = self.payload(request)

Additional Resources

  • See the Test S3 Access section in the Red Hat Ceph Storage Object Gateway Guide for more information on installing the Boto Python module.

2.3.12. Session tags for Attribute-based access control (ABAC) in STS

Session tags are key-value pairs that can be passed while federating a user. They are passed as aws:PrincipalTag in the session or temporary credentials that are returned back by secure token service (STS). These principal tags consist of session tags that come in as part of the web token and tags that are attached to the role being assumed.

Note

Currently, the session tags are only supported as part of the web token passed to AssumeRoleWithWebIdentity.

The tags have to be always specified in the following namespace: https://aws.amazon.com/tags.

Important

The trust policy must have sts:TagSession permission if the web token passed in by the federated user contains session tags. Otherwise, the AssumeRoleWithWebIdentity action fails.

Example of the trust policy with sts:TagSession:

{
        "Version":"2012-10-17",
        "Statement":[
        {
            "Effect":"Allow",
            "Action":["sts:AssumeRoleWithWebIdentity","sts:TagSession"],
            "Principal":{"Federated":["arn:aws:iam:::oidc-provider/localhost:8080/auth/realms/quickstart"]},
            "Condition":{"StringEquals":{"localhost:8080/auth/realms/quickstart:sub":"test"}}
        }]
    }

Properties

The following are the properties of session tags:

  • Session tags can be multi-valued.

    Note

    Multi-valued session tags are not supported in Amazon Web Service (AWS).

  • Keycloak can be set up as an OpenID Connect Identity Provider (IDP) with a maximum of 50 session tags.
  • The maximum size of a key allowed is 128 characters.
  • The maximum size of a value allowed is 256 characters.
  • The tag or the value cannot start with aws:.

Additional Resources

  • See the Secure Token Service section in the Red Hat Ceph Storage Developer Guide for more information about secure token service.
2.3.12.1. Tag keys

The following are the tag keys that can be used in the role trust policy or the role permission policy.

aws:RequestTag
Description

Compares the key-value pair passed in the request with the key-value pair in the role’s trust policy.

In the case of AssumeRoleWithWebIdentity, session tags can be used as aws:RequestTag in the role trust policy. Those session tags are passed by Keycloak in the web token. As a result, a federated user can assume a role.

aws:PrincipalTag
Description

Compares the key-value pair attached to the principal with the key-value pair in the policy.

In the case of AssumeRoleWithWebIdentity, session tags appear as principal tags in the temporary credentials once a user is authenticated. Those session tags are passed by Keycloak in the web token. They can be used as aws:PrincipalTag in the role permission policy.

iam:ResourceTag
Description

Compares the key-value pair attached to the resource with the key-value pair in the policy.

In the case of AssumeRoleWithWebIdentity, tags attached to the role are compared with those in the trust policy to allow a user to assume a role.

Note

The Ceph Object Gateway now supports RESTful APIs for tagging, listing tags, and untagging actions on a role.

aws:TagKeys
Description

Compares tags in the request with the tags in the policy.

In the case of AssumeRoleWithWebIdentity, tags are used to check the tag keys in a role trust policy or permission policy before a user is allowed to assume a role.

s3:ResourceTag
Description

Compares tags present on the S3 resource, that is bucket or object, with the tags in the role’s permission policy.

It can be used for authorizing an S3 operation in the Ceph Object Gateway. However, this is not allowed in AWS.

It is a key used to refer to tags that have been attached to an object or a bucket. Tags can be attached to an object or a bucket using RESTful APIs available for the same.

2.3.12.2. S3 resource tags

The following list shows which S3 resource tag type is supported for authorizing a particular operation.

Tag type: Object tags
Operations
GetObject, GetObjectTags, DeleteObjectTags, DeleteObject, PutACLs, InitMultipart, AbortMultipart , `ListMultipart, GetAttrs, PutObjectRetention, GetObjectRetention, PutObjectLegalHold, GetObjectLegalHold
Tag type: Bucket tags
Operations
PutObjectTags, GetBucketTags, PutBucketTags, DeleteBucketTags, GetBucketReplication, DeleteBucketReplication, GetBucketVersioning, SetBucketVersioning, GetBucketWebsite, SetBucketWebsite, DeleteBucketWebsite, StatBucket, ListBucket, GetBucketLogging, GetBucketLocation, DeleteBucket, GetLC, PutLC, DeleteLC, GetCORS, PutCORS, GetRequestPayment, SetRequestPayment. PutBucketPolicy, GetBucketPolicy, DeleteBucketPolicy, PutBucketObjectLock, GetBucketObjectLock, GetBucketPolicyStatus, PutBucketPublicAccessBlock, GetBucketPublicAccessBlock, DeleteBucketPublicAccessBlock
Tag type: Bucket tags for bucket ACLs, Object tags for object ACLs
Operations
GetACLs, PutACLs
Tag type: Object tags of source object, Bucket tags of destination bucket
Operations
PutObject, CopyObject

2.4. S3 bucket operations

As a developer, you can perform bucket operations with the Amazon S3 application programing interface (API) through the Ceph Object Gateway.

The following table list the Amazon S3 functional operations for buckets, along with the function’s support status.

Table 2.2. Bucket operations
FeatureStatusNotes

List Buckets

Supported

 

Create a Bucket

Supported

Different set of canned ACLs.

Bucket Lifecycle

Partially Supported

Expiration, NoncurrentVersionExpiration and AbortIncompleteMultipartUpload supported.

Put Bucket Lifecycle

Partially Supported

Expiration, NoncurrentVersionExpiration and AbortIncompleteMultipartUpload supported.

Delete Bucket Lifecycle

Supported

 

Get Bucket Objects

Supported

 

Bucket Location

Supported

 

Get Bucket Version

Supported

 

Put Bucket Version

Supported

 

Delete Bucket

Supported

 

Get Bucket ACLs

Supported

Different set of canned ACLs

Put Bucket ACLs

Supported

Different set of canned ACLs

Get Bucket cors

Supported

 

Put Bucket cors

Supported

 

Delete Bucket cors

Supported

 

List Bucket Object Versions

Supported

 

Head Bucket

Supported

 

List Bucket Multipart Uploads

Supported

 

Bucket Policies

Partially Supported

 

Get a Bucket Request Payment

Supported

 

Put a Bucket Request Payment

Supported

 

Multi-tenant Bucket Operations

Supported

 

2.4.1. Prerequisites

  • A running Red Hat Ceph Storage cluster.
  • A RESTful client.

2.4.2. S3 create bucket notifications

Create bucket notifications at the bucket level. The notification configuration has the Red Hat Ceph Storage Object Gateway S3 events, ObjectCreated and ObjectRemoved. These need to be published and the destination to send the bucket notifications. Bucket notifications are S3 operations.

To create a bucket notification for s3:objectCreate and s3:objectRemove events,use PUT:

Example

client.put_bucket_notification_configuration(
   Bucket=bucket_name,
   NotificationConfiguration={
       'TopicConfigurations': [
           {
               'Id': notification_name,
               'TopicArn': topic_arn,
               'Events': ['s3:ObjectCreated:*', 's3:ObjectRemoved:*']
           }]})

Important

Red Hat supports ObjectCreate events, such as, put, post, multipartUpload, and copy. Red Hat also supports ObjectRemove events, such as, object_delete and s3_multi_object_delete.

Request Entities

NotificationConfiguration
Description
list of TopicConfiguration entities.
Type
Container
Required
Yes
TopicConfiguration
Description
Id, Topic and list of Event entities.
Type
Container
Required
Yes
id
Description
Name of the notification.
Type
String
Required
Yes
Topic
Description

Topic Amazon Resource Name(ARN)

Note

The topic must be created beforehand.

Type
String
Required
Yes
Event
Description
List of supported events. Multiple event entities can be used. If omitted, all events are handled.
Type
String
Required
No
Filter
Description
S3Key, S3Metadata and S3Tags entities.
Type
Container
Required
No
S3Key
Description
A list of FilterRule entities, for filtering based on the object key. At most, 3 entities may be in the list, for example Name would be prefix, suffix or regex. All filter rules in the list must match for the filter to match.
Type
Container
Required
No
S3Metadata
Description
A list of FilterRule entities, for filtering based on object metadata. All filter rules in the list must match the metadata defined on the object. However, the object still matches if it has other metadata entries not listed in the filter.
Type
Container
Required
No
S3Tags
Description
A list of FilterRule entities, for filtering based on object tags. All filter rules in the list must match the tags defined on the object. However, the object still matches if it has other tags not listed in the filter.
Type
Container
Required
No
S3Key.FilterRule
Description
Name and Value entities. Name is : prefix, suffix or regex. The Value would hold the key prefix, key suffix or a regular expression for matching the key, accordingly.
Type
Container
Required
Yes
S3Metadata.FilterRule
Description
Name and Value entities. Name is the name of the metadata attribute for example x-amz-meta-xxx. The value is the expected value for this attribute.
Type
Container
Required
Yes
S3Tags.FilterRule
Description
Name and Value entities. Name is the tag key, and the value is the tag value.
Type
Container
Required
Yes

HTTP response

400
Status Code
MalformedXML
Description
The XML is not well-formed.
400
Status Code
InvalidArgument
Description
Missing Id or missing or invalid topic ARN or invalid event.
404
Status Code
NoSuchBucket
Description
The bucket does not exist.
404
Status Code
NoSuchKey
Description
The topic does not exist.

id="s3-get-bucket-notifications_dev"]

2.4.3. S3 get bucket notifications

Get a specific notification or list all the notifications configured on a bucket.

Syntax

Get /BUCKET?notification=NOTIFICATION_ID HTTP/1.1
Host: cname.domain.com
Date: date
Authorization: AWS ACCESS_KEY:HASH_OF_HEADER_AND_SECRET

Example

Get /testbucket?notification=testnotificationID HTTP/1.1
Host: cname.domain.com
Date: date
Authorization: AWS ACCESS_KEY:HASH_OF_HEADER_AND_SECRET

Example Response

<NotificationConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
    <TopicConfiguration>
        <Id></Id>
        <Topic></Topic>
        <Event></Event>
        <Filter>
            <S3Key>
                <FilterRule>
                    <Name></Name>
                    <Value></Value>
                </FilterRule>
                 </S3Key>
             <S3Metadata>
                 <FilterRule>
                     <Name></Name>
                     <Value></Value>
                 </FilterRule>
             </S3Metadata>
             <S3Tags>
                 <FilterRule>
                     <Name></Name>
                     <Value></Value>
                 </FilterRule>
             </S3Tags>
         </Filter>
    </TopicConfiguration>
</NotificationConfiguration>

Note

The notification subresource returns the bucket notification configuration or an empty NotificationConfiguration element. The caller must be the bucket owner.

Request Entities

notification-id
Description
Name of the notification. All notifications are listed if the ID is not provided.
Type
String
NotificationConfiguration
Description
list of TopicConfiguration entities.
Type
Container
Required
Yes
TopicConfiguration
Description
Id, Topic and list of Event entities.
Type
Container
Required
Yes
id
Description
Name of the notification.
Type
String
Required
Yes
Topic
Description

Topic Amazon Resource Name(ARN)

Note

The topic must be created beforehand.

Type
String
Required
Yes
Event
Description
Handled event. Multiple event entities may exist.
Type
String
Required
Yes
Filter
Description
The filters for the specified configuration.
Type
Container
Required
No

HTTP response

404
Status Code
NoSuchBucket
Description
The bucket does not exist.
404
Status Code
NoSuchKey
Description
The notification does not exist if it has been provided.

2.4.4. S3 delete bucket notifications

Delete a specific or all notifications from a bucket.

Note

Notification deletion is an extension to the S3 notification API. Any defined notifications on a bucket are deleted when the bucket is deleted. Deleting an unknown notification for example double delete, is not considered an error.

To delete a specific or all notifications use DELETE:

Syntax

DELETE /BUCKET?notification=NOTIFICATION_ID HTTP/1.1

Example

DELETE /testbucket?notification=testnotificationID HTTP/1.1

Request Entities

notification-id
Description
Name of the notification. All notifications on the bucket are deleted if the notification ID is not provided.
Type
String

HTTP response

404
Status Code
NoSuchBucket
Description
The bucket does not exist.

2.4.5. Accessing bucket host names

There are two different modes of accessing the buckets. The first, and preferred method identifies the bucket as the top-level directory in the URI.

Example

GET /mybucket HTTP/1.1
Host: cname.domain.com

The second method identifies the bucket via a virtual bucket host name.

Example

GET / HTTP/1.1
Host: mybucket.cname.domain.com

Tip

Red Hat prefers the first method, because the second method requires expensive domain certification and DNS wild cards.

2.4.6. S3 list buckets

GET / returns a list of buckets created by the user making the request. GET / only returns buckets created by an authenticated user. You cannot make an anonymous request.

Syntax

GET / HTTP/1.1
Host: cname.domain.com

Authorization: AWS ACCESS_KEY:HASH_OF_HEADER_AND_SECRET

Table 2.3. Response Entities
NameTypeDescription

Buckets

Container

Container for list of buckets.

Bucket

Container

Container for bucket information.

Name

String

Bucket name.

CreationDate

Date

UTC time when the bucket was created.

ListAllMyBucketsResult

Container

A container for the result.

Owner

Container

A container for the bucket owner’s ID and DisplayName.

ID

String

The bucket owner’s ID.

DisplayName

String

The bucket owner’s display name.

2.4.7. S3 return a list of bucket objects

Returns a list of bucket objects.

Syntax

GET /BUCKET?max-keys=25 HTTP/1.1
Host: cname.domain.com

Table 2.4. Parameters
NameTypeDescription

prefix

String

Only returns objects that contain the specified prefix.

delimiter

String

The delimiter between the prefix and the rest of the object name.

marker

String

A beginning index for the list of objects returned.

max-keys

Integer

The maximum number of keys to return. Default is 1000.

Table 2.5. HTTP Response
HTTP StatusStatus CodeDescription

200

OK

Buckets retrieved

GET /BUCKET returns a container for buckets with the following fields:

Table 2.6. Bucket Response Entities
NameTypeDescription

ListBucketResult

Entity

The container for the list of objects.

Name

String

The name of the bucket whose contents will be returned.

Prefix

String

A prefix for the object keys.

Marker

String

A beginning index for the list of objects returned.

MaxKeys

Integer

The maximum number of keys returned.

Delimiter

String

If set, objects with the same prefix will appear in the CommonPrefixes list.

IsTruncated

Boolean

If true, only a subset of the bucket’s contents were returned.

CommonPrefixes

Container

If multiple objects contain the same prefix, they will appear in this list.

The ListBucketResult contains objects, where each object is within a Contents container.

Table 2.7. Object Response Entities
NameTypeDescription

Contents

Object

A container for the object.

Key

String

The object’s key.

LastModified

Date

The object’s last-modified date/time.

ETag

String

An MD-5 hash of the object. (entity tag)

Size

Integer

The object’s size.

StorageClass

String

Should always return STANDARD.

2.4.8. S3 create a new bucket

Creates a new bucket. To create a bucket, you must have a user ID and a valid AWS Access Key ID to authenticate requests. You can not create buckets as an anonymous user.

Constraints

In general, bucket names should follow domain name constraints.

  • Bucket names must be unique.
  • Bucket names must begin and end with a lowercase letter.
  • Bucket names can contain a dash (-).

Syntax

PUT /BUCKET HTTP/1.1
Host: cname.domain.com
x-amz-acl: public-read-write

Authorization: AWS ACCESS_KEY:HASH_OF_HEADER_AND_SECRET

Table 2.8. Parameters
NameDescriptionValid ValuesRequired

x-amz-acl

Canned ACLs.

private, public-read,public-read-write, authenticated-read

No

HTTP Response

If the bucket name is unique, within constraints and unused, the operation will succeed. If a bucket with the same name already exists and the user is the bucket owner, the operation will succeed. If the bucket name is already in use, the operation will fail.

HTTP StatusStatus CodeDescription

409

BucketAlreadyExists

Bucket already exists under different user’s ownership.

2.4.9. S3 delete a bucket

Deletes a bucket. You can reuse bucket names following a successful bucket removal.

Syntax

DELETE /BUCKET HTTP/1.1
Host: cname.domain.com

Authorization: AWS ACCESS_KEY:HASH_OF_HEADER_AND_SECRET

Table 2.9. HTTP Response
HTTP StatusStatus CodeDescription

204

No Content

Bucket removed.

2.4.10. S3 bucket lifecycle

You can use a bucket lifecycle configuration to manage your objects so they are stored effectively throughout their lifetime. The S3 API in the Ceph Object Gateway supports a subset of the AWS bucket lifecycle actions:

  • Expiration: This defines the lifespan of objects within a bucket. It takes the number of days the object should live or an expiration date, at which point Ceph Object Gateway will delete the object. If the bucket doesn’t enable versioning, Ceph Object Gateway will delete the object permanently. If the bucket enables versioning, Ceph Object Gateway will create a delete marker for the current version, and then delete the current version.
  • NoncurrentVersionExpiration: This defines the lifespan of non-current object versions within a bucket. To use this feature, the bucket must enable versioning. It takes the number of days a non-current object should live, at which point Ceph Object Gateway will delete the non-current object.
  • AbortIncompleteMultipartUpload: This defines the number of days an incomplete multipart upload should live before it is aborted.

The lifecycle configuration contains one or more rules using the <Rule> element.

Example

<LifecycleConfiguration>
    <Rule>
      <Prefix/>
      <Status>Enabled</Status>
      <Expiration>
        <Days>10</Days>
      </Expiration>
    </Rule>
</LifecycleConfiguration>

A lifecycle rule can apply to all or a subset of objects in a bucket based on the <Filter> element that you specify in the lifecycle rule. You can specify a filter several ways:

  • Key prefixes
  • Object tags
  • Both key prefix and one or more object tags

Key prefixes

You can apply a lifecycle rule to a subset of objects based on the key name prefix. For example, specifying <keypre/> would apply to objects that begin with keypre/:

<LifecycleConfiguration>
    <Rule>
        <Status>Enabled</Status>
        <Filter>
           <Prefix>keypre/</Prefix>
        </Filter>
    </Rule>
</LifecycleConfiguration>

You can also apply different lifecycle rules to objects with different key prefixes:

<LifecycleConfiguration>
    <Rule>
        <Status>Enabled</Status>
        <Filter>
           <Prefix>keypre/</Prefix>
        </Filter>
    </Rule>
    <Rule>
        <Status>Enabled</Status>
        <Filter>
           <Prefix>mypre/</Prefix>
        </Filter>
    </Rule>
</LifecycleConfiguration>

Object tags

You can apply a lifecycle rule to only objects with a specific tag using the <Key> and <Value> elements:

<LifecycleConfiguration>
    <Rule>
        <Status>Enabled</Status>
        <Filter>
           <Tag>
              <Key>key</Key>
              <Value>value</Value>
           </Tag>
        </Filter>
    </Rule>
</LifecycleConfiguration>

Both prefix and one or more tags

In a lifecycle rule, you can specify a filter based on both the key prefix and one or more tags. They must be wrapped in the <And> element. A filter can have only one prefix, and zero or more tags:

<LifecycleConfiguration>
    <Rule>
        <Status>Enabled</Status>
        <Filter>
          <And>
             <Prefix>key-prefix</Prefix>
             <Tag>
                <Key>key1</Key>
                <Value>value1</Value>
             </Tag>
             <Tag>
                <Key>key2</Key>
                <Value>value2</Value>
             </Tag>
              ...
          </And>
        </Filter>
    </Rule>
</LifecycleConfiguration>

Additional Resources

2.4.11. S3 GET bucket lifecycle

To get a bucket lifecycle, use GET and specify a destination bucket.

Syntax

GET /BUCKET?lifecycle HTTP/1.1
Host: cname.domain.com

Authorization: AWS ACCESS_KEY:HASH_OF_HEADER_AND_SECRET

Request Headers

See the Common Request Headers for more information.

Response

The response contains the bucket lifecycle and its elements.

2.4.12. S3 create or replace a bucket lifecycle

To create or replace a bucket lifecycle, use PUT and specify a destination bucket and a lifecycle configuration. The Ceph Object Gateway only supports a subset of the S3 lifecycle functionality.

Syntax

PUT /BUCKET?lifecycle HTTP/1.1
Host: cname.domain.com

Authorization: AWS ACCESS_KEY:HASH_OF_HEADER_AND_SECRET
<LifecycleConfiguration>
  <Rule>
    <Expiration>
      <Days>10</Days>
    </Expiration>
  </Rule>
    ...
  <Rule>
  </Rule>
</LifecycleConfiguration>

Table 2.10. Request Headers
NameDescriptionValid ValuesRequired

content-md5

A base64 encoded MD-5 hash of the message.

A string. No defaults or constraints.

No

Additional Resources

2.4.13. S3 delete a bucket lifecycle

To delete a bucket lifecycle, use DELETE and specify a destination bucket.

Syntax

DELETE /BUCKET?lifecycle HTTP/1.1
Host: cname.domain.com

Authorization: AWS ACCESS_KEY:HASH_OF_HEADER_AND_SECRET

Request Headers

The request does not contain any special elements.

Response

The response returns common response status.

Additional Resources

  • See Appendix A for Amazon S3 common request headers.
  • See Appendix B for Amazon S3 common response status codes.

2.4.14. S3 get bucket location

Retrieves the bucket’s zone group. The user needs to be the bucket owner to call this. A bucket can be constrained to a zone group by providing LocationConstraint during a PUT request.

Add the location subresource to bucket resource as shown below.

Syntax

GET /BUCKET?location HTTP/1.1
Host: cname.domain.com

Authorization: AWS ACCESS_KEY:HASH_OF_HEADER_AND_SECRET

Table 2.11. Response Entities
NameTypeDescription

LocationConstraint

String

The zone group where bucket resides, empty string for default zone group

2.4.15. S3 get bucket versioning

Retrieves the versioning state of a bucket. The user needs to be the bucket owner to call this.

Add the versioning subresource to bucket resource as shown below.

Syntax

GET /BUCKET?versioning HTTP/1.1
Host: cname.domain.com

Authorization: AWS ACCESS_KEY:HASH_OF_HEADER_AND_SECRET

2.4.16. S3 put the bucket versioning

This subresource set the versioning state of an existing bucket. The user needs to be the bucket owner to set the versioning state. If the versioning state has never been set on a bucket, then it has no versioning state. Doing a GET versioning request does not return a versioning state value.

Setting the bucket versioning state:

Enabled : Enables versioning for the objects in the bucket. All objects added to the bucket receive a unique version ID. Suspended : Disables versioning for the objects in the bucket. All objects added to the bucket receive the version ID null.

Syntax

PUT /BUCKET?versioning HTTP/1.1

Table 2.12. Bucket Request Entities
NameTypeDescription

VersioningConfiguration

container

A container for the request.

Status

String

Sets the versioning state of the bucket. Valid Values: Suspended/Enabled

2.4.17. S3 get bucket access control lists

Retrieves the bucket access control list. The user needs to be the bucket owner or to have been granted READ_ACP permission on the bucket.

Add the acl subresource to the bucket request as shown below.

Syntax

GET /BUCKET?acl HTTP/1.1
Host: cname.domain.com

Authorization: AWS ACCESS_KEY:HASH_OF_HEADER_AND_SECRET

Table 2.13. Response Entities
NameTypeDescription

AccessControlPolicy

Container

A container for the response.

AccessControlList

Container

A container for the ACL information.

Owner

Container

A container for the bucket owner’s ID and DisplayName.

ID

String

The bucket owner’s ID.

DisplayName

String

The bucket owner’s display name.

Grant

Container

A container for Grantee and Permission.

Grantee

Container

A container for the DisplayName and ID of the user receiving a grant of permission.

Permission

String

The permission given to the Grantee bucket.

2.4.18. S3 put bucket Access Control Lists

Sets an access control to an existing bucket. The user needs to be the bucket owner or to have been granted WRITE_ACP permission on the bucket.

Add the acl subresource to the bucket request as shown below.

Syntax

PUT /BUCKET?acl HTTP/1.1

Table 2.14. Request Entities
NameTypeDescription

AccessControlPolicy

Container

A container for the request.

AccessControlList

Container

A container for the ACL information.

Owner

Container

A container for the bucket owner’s ID and DisplayName.

ID

String

The bucket owner’s ID.

DisplayName

String

The bucket owner’s display name.

Grant

Container

A container for Grantee and Permission.

Grantee

Container

A container for the DisplayName and ID of the user receiving a grant of permission.

Permission

String

The permission given to the Grantee bucket.

2.4.19. S3 get bucket cors

Retrieves the cors configuration information set for the bucket. The user needs to be the bucket owner or to have been granted READ_ACP permission on the bucket.

Add the cors subresource to the bucket request as shown below.

Syntax

GET /BUCKET?cors HTTP/1.1
Host: cname.domain.com

Authorization: AWS ACCESS_KEY:HASH_OF_HEADER_AND_SECRET

2.4.20. S3 put bucket cors

Sets the cors configuration for the bucket. The user needs to be the bucket owner or to have been granted READ_ACP permission on the bucket.

Add the cors subresource to the bucket request as shown below.

Syntax

PUT /BUCKET?cors HTTP/1.1
Host: cname.domain.com

Authorization: AWS ACCESS_KEY:HASH_OF_HEADER_AND_SECRET

2.4.21. S3 delete a bucket cors

Deletes the cors configuration information set for the bucket. The user needs to be the bucket owner or to have been granted READ_ACP permission on the bucket.

Add the cors subresource to the bucket request as shown below.

Syntax

DELETE /BUCKET?cors HTTP/1.1
Host: cname.domain.com

Authorization: AWS ACCESS_KEY:HASH_OF_HEADER_AND_SECRET

2.4.22. S3 list bucket object versions

Returns a list of metadata about all the version of objects within a bucket. Requires READ access to the bucket.

Add the versions subresource to the bucket request as shown below.

Syntax

GET /BUCKET?versions HTTP/1.1
Host: cname.domain.com

Authorization: AWS ACCESS_KEY:HASH_OF_HEADER_AND_SECRET

You can specify parameters for GET /BUCKET?versions, but none of them are required.

Table 2.15. Parameters
NameTypeDescription

prefix

String

Returns in-progress uploads whose keys contains the specified prefix.

delimiter

String

The delimiter between the prefix and the rest of the object name.

key-marker

String

The beginning marker for the list of uploads.

max-keys

Integer

The maximum number of in-progress uploads. The default is 1000.

version-id-marker

String

Specifies the object version to begin the list.

Table 2.16. Response Entities
NameTypeDescription

KeyMarker

String

The key marker specified by the key-marker request parameter (if any).

NextKeyMarker

String

The key marker to use in a subsequent request if IsTruncated is true.

NextUploadIdMarker

String

The upload ID marker to use in a subsequent request if IsTruncated is true.

IsTruncated

Boolean

If true, only a subset of the bucket’s upload contents were returned.

Size

Integer

The size of the uploaded part.

DisplayName

String

The owners’s display name.

ID

String

The owners’s ID.

Owner

Container

A container for the ID and DisplayName of the user who owns the object.

StorageClass

String

The method used to store the resulting object. STANDARD or REDUCED_REDUNDANCY

Version

Container

Container for the version information.

versionId

String

Version ID of an object.

versionIdMarker

String

The last version of the key in a truncated response.

2.4.23. S3 head bucket

Calls HEAD on a bucket to determine if it exists and if the caller has access permissions. Returns 200 OK if the bucket exists and the caller has permissions; 404 Not Found if the bucket does not exist; and, 403 Forbidden if the bucket exists but the caller does not have access permissions.

Syntax

HEAD /BUCKET HTTP/1.1
Host: cname.domain.com
Date: date
Authorization: AWS ACCESS_KEY:HASH_OF_HEADER_AND_SECRET

2.4.24. S3 list multipart uploads

GET /?uploads returns a list of the current in-progress multipart uploads, that is, the application initiates a multipart upload, but the service hasn’t completed all the uploads yet.

Syntax

GET /BUCKET?uploads HTTP/1.1

You can specify parameters for GET /BUCKET?uploads, but none of them are required.

Table 2.17. Parameters
NameTypeDescription

prefix

String

Returns in-progress uploads whose keys contains the specified prefix.

delimiter

String

The delimiter between the prefix and the rest of the object name.

key-marker

String

The beginning marker for the list of uploads.

max-keys

Integer

The maximum number of in-progress uploads. The default is 1000.

max-uploads

Integer

The maximum number of multipart uploads. The range from 1-1000. The default is 1000.

version-id-marker

String

Ignored if key-marker isn’t specified. Specifies the ID of first upload to list in lexicographical order at or following the ID.

Table 2.18. Response Entities
NameTypeDescription

ListMultipartUploadsResult

Container

A container for the results.

ListMultipartUploadsResult.Prefix

String

The prefix specified by the prefix request parameter (if any).

Bucket

String

The bucket that will receive the bucket contents.

KeyMarker

String

The key marker specified by the key-marker request parameter (if any).

UploadIdMarker

String

The marker specified by the upload-id-marker request parameter (if any).

NextKeyMarker

String

The key marker to use in a subsequent request if IsTruncated is true.

NextUploadIdMarker

String

The upload ID marker to use in a subsequent request if IsTruncated is true.

MaxUploads

Integer

The max uploads specified by the max-uploads request parameter.

Delimiter

String

If set, objects with the same prefix will appear in the CommonPrefixes list.

IsTruncated

Boolean

If true, only a subset of the bucket’s upload contents were returned.

Upload

Container

A container for Key, UploadId, InitiatorOwner, StorageClass, and Initiated elements.

Key

String

The key of the object once the multipart upload is complete.

UploadId

String

The ID that identifies the multipart upload.

Initiator

Container

Contains the ID and DisplayName of the user who initiated the upload.

DisplayName

String

The initiator’s display name.

ID

String

The initiator’s ID.

Owner

Container

A container for the ID and DisplayName of the user who owns the uploaded object.

StorageClass

String

The method used to store the resulting object. STANDARD or REDUCED_REDUNDANCY

Initiated

Date

The date and time the user initiated the upload.

CommonPrefixes

Container

If multiple objects contain the same prefix, they will appear in this list.

CommonPrefixes.Prefix

String

The substring of the key after the prefix as defined by the prefix request parameter.

2.4.25. S3 bucket policies

The Ceph Object Gateway supports a subset of the Amazon S3 policy language applied to buckets.

Creation and Removal

Ceph Object Gateway manages S3 Bucket policies through standard S3 operations rather than using the radosgw-admin CLI tool.

Administrators may use the s3cmd command to set or delete a policy.

Example

$ cat > examplepol
{
  "Version": "2012-10-17",
  "Statement": [{
    "Effect": "Allow",
    "Principal": {"AWS": ["arn:aws:iam::usfolks:user/fred"]},
    "Action": "s3:PutObjectAcl",
    "Resource": [
      "arn:aws:s3:::happybucket/*"
    ]
  }]
}

$ s3cmd setpolicy examplepol s3://happybucket
$ s3cmd delpolicy s3://happybucket

Limitations

Ceph Object Gateway only supports the following S3 actions:

  • s3:AbortMultipartUpload
  • s3:CreateBucket
  • s3:DeleteBucketPolicy
  • s3:DeleteBucket
  • s3:DeleteBucketWebsite
  • s3:DeleteObject
  • s3:DeleteObjectVersion
  • s3:GetBucketAcl
  • s3:GetBucketCORS
  • s3:GetBucketLocation
  • s3:GetBucketPolicy
  • s3:GetBucketRequestPayment
  • s3:GetBucketVersioning
  • s3:GetBucketWebsite
  • s3:GetLifecycleConfiguration
  • s3:GetObjectAcl
  • s3:GetObject
  • s3:GetObjectTorrent
  • s3:GetObjectVersionAcl
  • s3:GetObjectVersion
  • s3:GetObjectVersionTorrent
  • s3:ListAllMyBuckets
  • s3:ListBucketMultiPartUploads
  • s3:ListBucket
  • s3:ListBucketVersions
  • s3:ListMultipartUploadParts
  • s3:PutBucketAcl
  • s3:PutBucketCORS
  • s3:PutBucketPolicy
  • s3:PutBucketRequestPayment
  • s3:PutBucketVersioning
  • s3:PutBucketWebsite
  • s3:PutLifecycleConfiguration
  • s3:PutObjectAcl
  • s3:PutObject
  • s3:PutObjectVersionAcl
Note

Ceph Object Gateway does not support setting policies on users, groups, or roles.

The Ceph Object Gateway uses the RGW ‘tenant’ identifier in place of the Amazon twelve-digit account ID. Ceph Object Gateway administrators who want to use policies between Amazon Web Service (AWS) S3 and Ceph Object Gateway S3 will have to use the Amazon account ID as the tenant ID when creating users.

With AWS S3, all tenants share a single namespace. By contrast, Ceph Object Gateway gives every tenant its own namespace of buckets. At present, Ceph Object Gateway clients trying to access a bucket belonging to another tenant MUST address it as tenant:bucket in the S3 request.

In the AWS, a bucket policy can grant access to another account, and that account owner can then grant access to individual users with user permissions. Since Ceph Object Gateway does not yet support user, role, and group permissions, account owners will need to grant access directly to individual users.

Important

Granting an entire account access to a bucket grants access to ALL users in that account.

Bucket policies do NOT support string interpolation.

Ceph Object Gateway supports the following condition keys:

  • aws:CurrentTime
  • aws:EpochTime
  • aws:PrincipalType
  • aws:Referer
  • aws:SecureTransport
  • aws:SourceIp
  • aws:UserAgent
  • aws:username

Ceph Object Gateway ONLY supports the following condition keys for the ListBucket action:

  • s3:prefix
  • s3:delimiter
  • s3:max-keys

Impact on Swift

Ceph Object Gateway provides no functionality to set bucket policies under the Swift API. However, bucket policies that have been set with the S3 API govern Swift as well as S3 operations.

Ceph Object Gateway matches Swift credentials against Principals specified in a policy.

2.4.26. S3 get the request payment configuration on a bucket

Uses the requestPayment subresource to return the request payment configuration of a bucket. The user needs to be the bucket owner or to have been granted READ_ACP permission on the bucket.

Add the requestPayment subresource to the bucket request as shown below.

Syntax

GET /BUCKET?requestPayment HTTP/1.1
Host: cname.domain.com

Authorization: AWS ACCESS_KEY:HASH_OF_HEADER_AND_SECRET

2.4.27. S3 set the request payment configuration on a bucket

Uses the requestPayment subresource to set the request payment configuration of a bucket. By default, the bucket owner pays for downloads from the bucket. This configuration parameter enables the bucket owner to specify that the person requesting the download will be charged for the request and the data download from the bucket.

Add the requestPayment subresource to the bucket request as shown below.

Syntax

PUT /BUCKET?requestPayment HTTP/1.1
Host: cname.domain.com

Table 2.19. Request Entities
NameTypeDescription

Payer

Enum

Specifies who pays for the download and request fees.

RequestPaymentConfiguration

Container

A container for Payer.

2.4.28. Multi-tenant bucket operations

When a client application accesses buckets, it always operates with credentials of a particular user. In Red Hat Ceph Storage cluster, every user belongs to a tenant. Consequently, every bucket operation has an implicit tenant in its context if no tenant is specified explicitly. Thus multi tenancy is completely backward compatible with previous releases, as long as the referred buckets and referring user belong to the same tenant.

Extensions employed to specify an explicit tenant differ according to the protocol and authentication system used.

In the following example, a colon character separates tenant and bucket. Thus a sample URL would be:

https://rgw.domain.com/tenant:bucket

By contrast, a simple Python example separates the tenant and bucket in the bucket method itself:

Example

from boto.s3.connection import S3Connection, OrdinaryCallingFormat
  c = S3Connection(
    aws_access_key_id="TESTER",
    aws_secret_access_key="test123",
    host="rgw.domain.com",
    calling_format = OrdinaryCallingFormat()
  )
  bucket = c.get_bucket("tenant:bucket")

Note

It’s not possible to use S3-style subdomains using multi-tenancy, since host names cannot contain colons or any other separators that are not already valid in bucket names. Using a period creates an ambiguous syntax. Therefore, the bucket-in-URL-path format has to be used with multi-tenancy.

Additional Resources

2.4.29. Additional Resources

2.5. S3 object operations

As a developer, you can perform object operations with the Amazon S3 application programing interface (API) through the Ceph Object Gateway.

The following table list the Amazon S3 functional operations for objects, along with the function’s support status.

Table 2.20. Object operations
Get ObjectSupported 

Get Object Information

Supported

 

Put Object

Supported

 

Delete Object

Supported

 

Delete Multiple Objects

Supported

 

Get Object ACLs

Supported

 

Put Object ACLs

Supported

 

Copy Object

Supported

 

Post Object

Supported

 

Options Object

Supported

 

Initiate Multipart Upload

Supported

 

Add a Part to a Multipart Upload

Supported

 

List Parts of a Multipart Upload

Supported

 

Assemble Multipart Upload

Supported

 

Copy Multipart Upload

Supported

 

Abort Multipart Upload

Supported

 

Multi-Tenancy

Supported

 

2.5.1. Prerequisites

  • A running Red Hat Ceph Storage cluster.
  • A RESTful client.

2.5.2. S3 get an object from a bucket

Retrieves an object from a bucket:

Syntax

GET /BUCKET/OBJECT HTTP/1.1

Add the versionId subresource to retrieve a particular version of the object:

Syntax

GET /BUCKET/OBJECT?versionId=VERSION_ID HTTP/1.1

Table 2.21. Request Headers
NameDescriptionValid ValuesRequired

range

The range of the object to retrieve.

Range: bytes=beginbyte-endbyte

No

if-modified-since

Gets only if modified since the timestamp.

Timestamp

No

if-unmodified-since

Gets only if not modified since the timestamp.

Timestamp

No

if-match

Gets only if object ETag matches ETag.

Entity Tag

No

if-none-match

Gets only if object ETag matches ETag.

Entity Tag

No

Table 2.22. Response Headers
NameDescription

Content-Range

Data range, will only be returned if the range header field was specified in the request

x-amz-version-id

Returns the version ID or null.

2.5.3. S3 get information on an object

Returns information about an object. This request will return the same header information as with the Get Object request, but will include the metadata only, not the object data payload.

Retrieves the current version of the object:

Syntax

HEAD /BUCKET/OBJECT HTTP/1.1

Add the versionId subresource to retrieve info for a particular version:

Syntax

HEAD /BUCKET/OBJECT?versionId=VERSION_ID HTTP/1.1

Table 2.23. Request Headers
NameDescriptionValid ValuesRequired

range

The range of the object to retrieve.

Range: bytes=beginbyte-endbyte

No

if-modified-since

Gets only if modified since the timestamp.

Timestamp

No

if-unmodified-since

Gets only if not modified since the timestamp.

Timestamp

No

if-match

Gets only if object ETag matches ETag.

Entity Tag

No

if-none-match

Gets only if object ETag matches ETag.

Entity Tag

No

Table 2.24. Response Headers
NameDescription

x-amz-version-id

Returns the version ID or null.

2.5.4. S3 add an object to a bucket

Adds an object to a bucket. You must have write permissions on the bucket to perform this operation.

Syntax

PUT /BUCKET/OBJECT HTTP/1.1

Table 2.25. Request Headers
NameDescriptionValid ValuesRequired

content-md5

A base64 encoded MD-5 hash of the message.

A string. No defaults or constraints.

No

content-type

A standard MIME type.

Any MIME type. Default: binary/octet-stream

No

x-amz-meta-<…​>

User metadata. Stored with the object.

A string up to 8kb. No defaults.

No

x-amz-acl

A canned ACL.

private, public-read, public-read-write, authenticated-read

No

Table 2.26. Response Headers
NameDescription

x-amz-version-id

Returns the version ID or null.

2.5.5. S3 delete an object

Removes an object. Requires WRITE permission set on the containing bucket.

Deletes an object. If object versioning is on, it creates a marker.

Syntax

DELETE /BUCKET/OBJECT HTTP/1.1

To delete an object when versioning is on, you must specify the versionId subresource and the version of the object to delete.

DELETE /BUCKET/OBJECT?versionId=VERSION_ID HTTP/1.1

2.5.6. S3 delete multiple objects

This API call deletes multiple objects from a bucket.

Syntax

POST /BUCKET/OBJECT?delete HTTP/1.1

2.5.7. S3 get an object’s Access Control List (ACL)

Returns the ACL for the current version of the object:

Syntax

GET /BUCKET/OBJECT?acl HTTP/1.1

Add the versionId subresource to retrieve the ACL for a particular version:

Syntax

GET /BUCKET/OBJECT?versionId=VERSION_ID&acl HTTP/1.1

Table 2.27. Response Headers
NameDescription

x-amz-version-id

Returns the version ID or null.

Table 2.28. Response Entities
NameTypeDescription

AccessControlPolicy

Container

A container for the response.

AccessControlList

Container

A container for the ACL information.

Owner

Container

A container for the object owner’s ID and DisplayName.

ID

String

The object owner’s ID.

DisplayName

String

The object owner’s display name.

Grant

Container

A container for Grantee and Permission.

Grantee

Container

A container for the DisplayName and ID of the user receiving a grant of permission.

Permission

String

The permission given to the Grantee object.

2.5.8. S3 set an object’s Access Control List (ACL)

Sets an object ACL for the current version of the object.

Syntax

PUT /BUCKET/OBJECT?acl

Table 2.29. Request Entities
NameTypeDescription

AccessControlPolicy

Container

A container for the response.

AccessControlList

Container

A container for the ACL information.

Owner

Container

A container for the object owner’s ID and DisplayName.

ID

String

The object owner’s ID.

DisplayName

String

The object owner’s display name.

Grant

Container

A container for Grantee and Permission.

Grantee

Container

A container for the DisplayName and ID of the user receiving a grant of permission.

Permission

String

The permission given to the Grantee object.

2.5.9. S3 copy an object

To copy an object, use PUT and specify a destination bucket and the object name.

Syntax

PUT /DEST_BUCKET/DEST_OBJECT HTTP/1.1
x-amz-copy-source: SOURCE_BUCKET/SOURCE_OBJECT

Table 2.30. Request Headers
NameDescriptionValid ValuesRequired

x-amz-copy-source

The source bucket name + object name.

BUCKET/OBJECT

Yes

x-amz-acl

A canned ACL.

private, public-read, public-read-write, authenticated-read

No

x-amz-copy-if-modified-since

Copies only if modified since the timestamp.

Timestamp

No

x-amz-copy-if-unmodified-since

Copies only if unmodified since the timestamp.

Timestamp

No

x-amz-copy-if-match

Copies only if object ETag matches ETag.

Entity Tag

No

x-amz-copy-if-none-match

Copies only if object ETag doesn’t match.

Entity Tag

No

Table 2.31. Response Entities
NameTypeDescription

CopyObjectResult

Container

A container for the response elements.

LastModified

Date

The last modified date of the source object.

Etag

String

The ETag of the new object.

Additional Resources

  • <additional resource 1>
  • <additional resource 2>

2.5.10. S3 add an object to a bucket using HTML forms

Adds an object to a bucket using HTML forms. You must have write permissions on the bucket to perform this operation.

Syntax

POST /BUCKET/OBJECT HTTP/1.1

2.5.11. S3 determine options for a request

A preflight request to determine if an actual request can be sent with the specific origin, HTTP method, and headers.

Syntax

OPTIONS /OBJECT HTTP/1.1

2.5.12. S3 initiate a multipart upload

Initiates a multi-part upload process. Returns a UploadId, which you can specify when adding additional parts, listing parts, and completing or abandoning a multi-part upload.

Syntax

POST /BUCKET/OBJECT?uploads

Table 2.32. Request Headers
NameDescriptionValid ValuesRequired

content-md5

A base64 encoded MD-5 hash of the message.

A string. No defaults or constraints.

No

content-type

A standard MIME type.

Any MIME type. Default: binary/octet-stream

No

x-amz-meta-<…​>

User metadata. Stored with the object.

A string up to 8kb. No defaults.

No

x-amz-acl

A canned ACL.

private, public-read, public-read-write, authenticated-read

No

Table 2.33. Response Entities
NameTypeDescription

InitiatedMultipartUploadsResult

Container

A container for the results.

Bucket

String

The bucket that will receive the object contents.

Key

String

The key specified by the key request parameter (if any).

UploadId

String

The ID specified by the upload-id request parameter identifying the multipart upload (if any).

2.5.13. S3 add a part to a multipart upload

Adds a part to a multi-part upload.

Specify the uploadId subresource and the upload ID to add a part to a multi-part upload:

Syntax

PUT /BUCKET/OBJECT?partNumber=&uploadId=UPLOAD_ID HTTP/1.1

The following HTTP response might be returned:

Table 2.34. HTTP Response
HTTP StatusStatus CodeDescription

404

NoSuchUpload

Specified upload-id does not match any initiated upload on this object

2.5.14. S3 list the parts of a multipart upload

Specify the uploadId subresource and the upload ID to list the parts of a multi-part upload:

Syntax

GET /BUCKET/OBJECT?uploadId=UPLOAD_ID HTTP/1.1

Table 2.35. Response Entities
NameTypeDescription

InitiatedMultipartUploadsResult

Container

A container for the results.

Bucket

String

The bucket that will receive the object contents.

Key

String

The key specified by the key request parameter (if any).

UploadId

String

The ID specified by the upload-id request parameter identifying the multipart upload (if any).

Initiator

Container

Contains the ID and DisplayName of the user who initiated the upload.

ID

String

The initiator’s ID.

DisplayName

String

The initiator’s display name.

Owner

Container

A container for the ID and DisplayName of the user who owns the uploaded object.

StorageClass

String

The method used to store the resulting object. STANDARD or REDUCED_REDUNDANCY

PartNumberMarker

String

The part marker to use in a subsequent request if IsTruncated is true. Precedes the list.

NextPartNumberMarker

String

The next part marker to use in a subsequent request if IsTruncated is true. The end of the list.

MaxParts

Integer

The max parts allowed in the response as specified by the max-parts request parameter.

IsTruncated

Boolean

If true, only a subset of the object’s upload contents were returned.

Part

Container

A container for Key, Part, InitiatorOwner, StorageClass, and Initiated elements.

PartNumber

Integer

The identification number of the part.

ETag

String

The part’s entity tag.

Size

Integer

The size of the uploaded part.

2.5.15. S3 assemble the uploaded parts

Assembles uploaded parts and creates a new object, thereby completing a multipart upload.

Specify the uploadId subresource and the upload ID to complete a multi-part upload:

Syntax

POST /BUCKET/OBJECT?uploadId=UPLOAD_ID HTTP/1.1

Table 2.36. Request Entities
NameTypeDescriptionRequired

CompleteMultipartUpload

Container

A container consisting of one or more parts.

Yes

Part

Container

A container for the PartNumber and ETag.

Yes

PartNumber

Integer

The identifier of the part.

Yes

ETag

String

The part’s entity tag.

Yes

Table 2.37. Response Entities
NameTypeDescription

CompleteMultipartUploadResult

Container

A container for the response.

Location

URI

The resource identifier (path) of the new object.

Bucket

String

The name of the bucket that contains the new object.

Key

String

The object’s key.

ETag

String

The entity tag of the new object.

2.5.16. S3 copy a multipart upload

Uploads a part by copying data from an existing object as data source.

Specify the uploadId subresource and the upload ID to perform a multi-part upload copy:

Syntax

PUT /BUCKET/OBJECT?partNumber=PartNumber&uploadId=UPLOAD_ID HTTP/1.1
Host: cname.domain.com

Authorization: AWS ACCESS_KEY:HASH_OF_HEADER_AND_SECRET

Table 2.38. Request Headers
NameDescriptionValid ValuesRequired

x-amz-copy-source

The source bucket name and object name.

BUCKET/OBJECT

Yes

x-amz-copy-source-range

The range of bytes to copy from the source object.

Range: bytes=first-last, where the first and last are the zero-based byte offsets to copy. For example, bytes=0-9 indicates that you want to copy the first ten bytes of the source.

No

Table 2.39. Response Entities
NameTypeDescription

CopyPartResult

Container

A container for all response elements.

ETag

String

Returns the ETag of the new part.

LastModified

String

Returns the date the part was last modified.

.Additional Resources

2.5.17. S3 abort a multipart upload

Aborts a multipart upload.

Specify the uploadId subresource and the upload ID to abort a multi-part upload:

Syntax

DELETE /BUCKET/OBJECT?uploadId=UPLOAD_ID HTTP/1.1

2.5.18. S3 Hadoop interoperability

For data analytics applications that require Hadoop Distributed File System (HDFS) access, the Ceph Object Gateway can be accessed using the Apache S3A connector for Hadoop. The S3A connector is an open source tool that presents S3 compatible object storage as an HDFS file system with HDFS file system read and write semantics to the applications while data is stored in the Ceph Object Gateway.

Ceph Object Gateway is fully compatible with the S3A connector that ships with Hadoop 2.7.3.

2.5.19. Additional Resources

2.6. Additional Resources

  • See Appendix A for Amazon S3 common request headers.
  • See Appendix B for Amazon S3 common response status codes.
  • See Appendix C for unsupported header fields.

Chapter 3. Ceph Object Gateway and the Swift API

As a developer, you can use a RESTful application programing interface (API) that is compatible with the Swift API data access model. You can manage the buckets and objects stored in Red Hat Ceph Storage cluster through the Ceph Object Gateway.

The following table describes the support status for current Swift functional features:

Table 3.1. Features
FeatureStatusRemarks

Authentication

Supported

 

Get Account Metadata

Supported

No custom metadata

Swift ACLs

Supported

Supports a subset of Swift ACLs

List Containers

Supported

 

List Container’s Objects

Supported

 

Create Container

Supported

 

Delete Container

Supported

 

Get Container Metadata

Supported

 

Add/Update Container Metadata

Supported

 

Delete Container Metadata

Supported

 

Get Object

Supported

 

Create/Update an Object

Supported

 

Create Large Object

Supported

 

Delete Object

Supported

 

Copy Object

Supported

 

Get Object Metadata

Supported

 

Add/Update Object Metadata

Supported

 

Temp URL Operations

Supported

 

CORS

Not Supported

 

Expiring Objects

Supported

 

Object Versioning

Not Supported

 

Static Website

Not Supported

 

3.1. Prerequisites

  • A running Red Hat Ceph Storage cluster.
  • A RESTful client.

3.2. Swift API limitations

Important

The following limitations should be used with caution. There are implications related to your hardware selections, so you should always discuss these requirements with your Red Hat account team.

  • Maximum object size when using Swift API: 5GB
  • Maximum metadata size when using Swift API: There is no defined limit on the total size of user metadata that can be applied to an object, but a single HTTP request is limited to 16,000 bytes.

3.3. Create a Swift user

To test the Swift interface, create a Swift subuser. Creating a Swift user is a two step process. The first step is to create the user. The second step is to create the secret key.

Note

In a multi-site deployment, always create a user on a host in the master zone of the master zone group.

Prerequisites

  • Installation of the Ceph Object Gateway.
  • Root-level access to the Ceph Object Gateway node.

Procedure

  1. Create the Swift user:

    Syntax

    radosgw-admin subuser create --uid=NAME --subuser=NAME:swift --access=full

    Replace NAME with the Swift user name, for example:

    Example

    [root@rgw]# radosgw-admin subuser create --uid=testuser --subuser=testuser:swift --access=full
    {
        "user_id": "testuser",
        "display_name": "First User",
        "email": "",
        "suspended": 0,
        "max_buckets": 1000,
        "auid": 0,
        "subusers": [
            {
                "id": "testuser:swift",
                "permissions": "full-control"
            }
        ],
        "keys": [
            {
                "user": "testuser",
                "access_key": "O8JDE41XMI74O185EHKD",
                "secret_key": "i4Au2yxG5wtr1JK01mI8kjJPM93HNAoVWOSTdJd6"
            }
        ],
        "swift_keys": [
            {
                "user": "testuser:swift",
                "secret_key": "13TLtdEW7bCqgttQgPzxFxziu0AgabtOc6vM8DLA"
            }
        ],
        "caps": [],
        "op_mask": "read, write, delete",
        "default_placement": "",
        "placement_tags": [],
        "bucket_quota": {
            "enabled": false,
            "check_on_raw": false,
            "max_size": -1,
            "max_size_kb": 0,
            "max_objects": -1
        },
        "user_quota": {
            "enabled": false,
            "check_on_raw": false,
            "max_size": -1,
            "max_size_kb": 0,
            "max_objects": -1
        },
        "temp_url_keys": [],
        "type": "rgw"
    }

  2. Create the secret key:

    Syntax

    radosgw-admin key create --subuser=NAME:swift --key-type=swift --gen-secret

    Replace NAME with the Swift user name, for example:

    Example

    [root@rgw]# radosgw-admin key create --subuser=testuser:swift --key-type=swift --gen-secret
    {
        "user_id": "testuser",
        "display_name": "First User",
        "email": "",
        "suspended": 0,
        "max_buckets": 1000,
        "auid": 0,
        "subusers": [
            {
                "id": "testuser:swift",
                "permissions": "full-control"
            }
        ],
        "keys": [
            {
                "user": "testuser",
                "access_key": "O8JDE41XMI74O185EHKD",
                "secret_key": "i4Au2yxG5wtr1JK01mI8kjJPM93HNAoVWOSTdJd6"
            }
        ],
        "swift_keys": [
            {
                "user": "testuser:swift",
                "secret_key": "a4ioT4jEP653CDcdU8p4OuhruwABBRZmyNUbnSSt"
            }
        ],
        "caps": [],
        "op_mask": "read, write, delete",
        "default_placement": "",
        "placement_tags": [],
        "bucket_quota": {
            "enabled": false,
            "check_on_raw": false,
            "max_size": -1,
            "max_size_kb": 0,
            "max_objects": -1
        },
        "user_quota": {
            "enabled": false,
            "check_on_raw": false,
            "max_size": -1,
            "max_size_kb": 0,
            "max_objects": -1
        },
        "temp_url_keys": [],
        "type": "rgw"
    }

3.4. Swift authenticating a user

To authenticate a user, make a request containing an X-Auth-User and a X-Auth-Key in the header.

Syntax

GET /auth HTTP/1.1
Host: swift.example.com
X-Auth-User: johndoe
X-Auth-Key: R7UUOLFDI2ZI9PRCQ53K

Example Response

HTTP/1.1 204 No Content
Date: Mon, 16 Jul 2012 11:05:33 GMT
Server: swift
X-Storage-Url: https://swift.example.com
X-Storage-Token: UOlCCC8TahFKlWuv9DB09TWHF0nDjpPElha0kAa
Content-Length: 0
Content-Type: text/plain; charset=UTF-8

Note

You can retrieve data about Ceph’s Swift-compatible service by executing GET requests using the X-Storage-Url value during authentication.

Additional Resources

3.5. Swift container operations

As a developer, you can perform container operations with the Swift application programing interface (API) through the Ceph Object Gateway. You can list, create, update, and delete containers. You can also add or update the container’s metadata.

3.5.1. Prerequisites

  • A running Red Hat Ceph Storage cluster.
  • A RESTful client.

3.5.2. Swift container operations

A container is a mechanism for storing data objects. An account can have many containers, but container names must be unique. This API enables a client to create a container, set access controls and metadata, retrieve a container’s contents, and delete a container. Since this API makes requests related to information in a particular user’s account, all requests in this API must be authenticated unless a container’s access control is deliberately made publicly accessible, that is, allows anonymous requests.

Note

The Amazon S3 API uses the term 'bucket' to describe a data container. When you hear someone refer to a 'bucket' within the Swift API, the term 'bucket' might be construed as the equivalent of the term 'container.'

One facet of object storage is that it does not support hierarchical paths or directories. Instead, it supports one level consisting of one or more containers, where each container might have objects. The RADOS Gateway’s Swift-compatible API supports the notion of 'pseudo-hierarchical containers', which is a means of using object naming to emulate a container, or directory hierarchy without actually implementing one in the storage system. You can name objects with pseudo-hierarchical names, for example, photos/buildings/empire-state.jpg, but container names cannot contain a forward slash (/) character.

Important

When uploading large objects to versioned Swift containers, use the --leave-segments option with the python-swiftclient utility. Not using --leave-segments overwrites the manifest file. Consequently, an existing object is overwritten, which leads to data loss.

3.5.3. Swift update a container’s Access Control List (ACL)

When a user creates a container, the user has read and write access to the container by default. To allow other users to read a container’s contents or write to a container, you must specifically enable the user. You can also specify * in the X-Container-Read or X-Container-Write settings, which effectively enables all users to either read from or write to the container. Setting * makes the container public. That is it enables anonymous users to either read from or write to the container.

Syntax

POST /AP_VERSION/ACCOUNT/TENANT:CONTAINER HTTP/1.1
Host: FULLY_QUALIFIED_DOMAIN_NAME
X-Auth-Token: AUTH_TOKEN
X-Container-Read: *
X-Container-Write: UID1, UID2, UID3

Table 3.2. Request Headers
NameDescriptionTypeRequired

X-Container-Read

The user IDs with read permissions for the container.

Comma-separated string values of user IDs.

No

X-Container-Write

The user IDs with write permissions for the container.

Comma-separated string values of user IDs.

No

3.5.4. Swift list containers

A GET request that specifies the API version and the account will return a list of containers for a particular user account. Since the request returns a particular user’s containers, the request requires an authentication token. The request cannot be made anonymously.

Syntax

GET /API_VERSION/ACCOUNT HTTP/1.1
Host: FULLY_QUALIFIED_DOMAIN_NAME
X-Auth-Token: AUTH_TOKEN

Table 3.3. Request Parameters
NameDescriptionTypeRequiredValid Values

limit

Limits the number of results to the specified value.

Integer

No

N/A

format

Defines the format of the result.

String

No

json or xml

marker

Returns a list of results greater than the marker value.

String

No

N/A

The response contains a list of containers, or returns with an HTTP 204 response code

Table 3.4. Response Entities
NameDescriptionType

account

A list for account information.

Container

container

The list of containers.

Container

name

The name of a container.

String

bytes

The size of the container.

Integer

3.5.5. Swift list a container’s objects

To list the objects within a container, make a GET request with the with the API version, account, and the name of the container. You can specify query parameters to filter the full list, or leave out the parameters to return a list of the first 10,000 object names stored in the container.

Syntax

GET /AP_VERSION/TENANT:CONTAINER HTTP/1.1
Host: FULLY_QUALIFIED_DOMAIN_NAME
X-Auth-Token: AUTH_TOKEN

Table 3.5. Parameters
NameDescriptionTypeValid ValuesRequired

format

Defines the format of the result.

String

json or xml

No

prefix

Limits the result set to objects beginning with the specified prefix.

String

N/A

No

marker

Returns a list of results greater than the marker value.

String

N/A

No

limit

Limits the number of results to the specified value.

Integer

0 - 10,000

No

delimiter

The delimiter between the prefix and the rest of the object name.

String

N/A

No

path

The pseudo-hierarchical path of the objects.

String

N/A

No

Table 3.6. Response Entities
NameDescriptionType

container

The container.

Container

object

An object within the container.

Container

name

The name of an object within the container.

String

hash

A hash code of the object’s contents.

String

last_modified

The last time the object’s contents were modified.

Date

content_type

The type of content within the object.

String

3.5.6. Swift create a container

To create a new container, make a PUT request with the API version, account, and the name of the new container. The container name must be unique, must not contain a forward-slash (/) character, and should be less than 256 bytes. You can include access control headers and metadata headers in the request. You can also include a storage policy identifying a key for a set of placement pools. For example, execute radosgw-admin zone get to see a list of available keys under placement_pools. A storage policy enables you to specify a special set of pools for the container, for example, SSD-based storage. The operation is idempotent. If you make a request to create a container that already exists, it will return with a HTTP 202 return code, but will not create another container.

Syntax

PUT /AP_VERSION/ACCOUNT/TENANT:CONTAINER HTTP/1.1
Host: FULLY_QUALIFIED_DOMAIN_NAME
X-Auth-Token: AUTH_TOKEN
X-Container-Read: COMMA_SEPARATED_UIDS
X-Container-Write: COMMA_SEPARATED_UIDS
X-Container-Meta-KEY:VALUE
X-Storage-Policy: PLACEMENT_POOLS_KEY

Table 3.7. Headers
NameDescriptionTypeRequired

X-Container-Read

The user IDs with read permissions for the container.

Comma-separated string values of user IDs.

No

X-Container-Write

The user IDs with write permissions for the container.

Comma-separated string values of user IDs.

No

X-Container-Meta-KEY

A user-defined meta data key that takes an arbitrary string value.

String

No

X-Storage-Policy

The key that identifies the storage policy under placement_pools for the Ceph Object Gateway. Execute radosgw-admin zone get for available keys.

String

No

If a container with the same name already exists, and the user is the container owner then the operation will succeed. Otherwise the operation will fail.

Table 3.8. HTTP Response
NameDescriptionStatus Code

409

The container already exists under a different user’s ownership.

BucketAlreadyExists

3.5.7. Swift delete a container

To delete a container, make a DELETE request with the API version, account, and the name of the container. The container must be empty. If you’d like to check if the container is empty, execute a HEAD request against the container. Once you’ve successfully removed the container, you’ll be able to reuse the container name.

Syntax

DELETE /AP_VERSION/ACCOUNT/TENANT:CONTAINER HTTP/1.1
Host: FULLY_QUALIFIED_DOMAIN_NAME
X-Auth-Token: AUTH_TOKEN

Table 3.9. HTTP Response
NameDescriptionStatus Code

204

The container was removed.

NoContent

3.5.8. Swift add or update the container metadata

To add metadata to a container, make a POST request with the API version, account, and container name. You must have write permissions on the container to add or update metadata.

Syntax

POST /AP_VERSION/ACCOUNT/TENANT:CONTAINER HTTP/1.1
Host: FULLY_QUALIFIED_DOMAIN_NAME
X-Auth-Token: AUTH_TOKEN
X-Container-Meta-Color: red
X-Container-Meta-Taste: salty

Table 3.10. Request Headers
NameDescriptionTypeRequired

X-Container-Meta-KEY

A user-defined meta data key that takes an arbitrary string value.

String

No

3.6. Swift object operations

As a developer, you can perform object operations with the Swift application programing interface (API) through the Ceph Object Gateway. You can list, create, update, and delete objects. You can also add or update the object’s metadata.

3.6.1. Prerequisites

  • A running Red Hat Ceph Storage cluster.
  • A RESTful client.

3.6.2. Swift object operations

An object is a container for storing data and metadata. A container might have many objects, but the object names must be unique. This API enables a client to create an object, set access controls and metadata, retrieve an object’s data and metadata, and delete an object. Since this API makes requests related to information in a particular user’s account, all requests in this API must be authenticated. Unless the container or object’s access control is deliberately made publicly accessible, that is, allows anonymous requests.

3.6.3. Swift get an object

To retrieve an object, make a GET request with the API version, account, container and object name. You must have read permissions on the container to retrieve an object within it.

Syntax

GET /AP_VERSION/ACCOUNT/TENANT:CONTAINER/OBJECT HTTP/1.1
Host: FULLY_QUALIFIED_DOMAIN_NAME
X-Auth-Token: AUTH_TOKEN

Table 3.11. Request Headers
NameDescriptionTypeRequired

range

To retrieve a subset of an object’s contents, you can specify a byte range.

Date

No

If-Modified-Since

Only copies if modified since the date/time of the source object’s last_modified attribute.

Date

No

If-Unmodified-Since

Only copies if not modified since the date/time of the source object’s last_modified attribute.

Date

No

Copy-If-Match

Copies only if the ETag in the request matches the source object’s ETag.

ETag.

No

Copy-If-None-Match

Copies only if the ETag in the request does not match the source object’s ETag.

ETag.

No

Table 3.12. Response Headers
NameDescription

Content-Range

The range of the subset of object contents. Returned only if the range header field was specified in the request.

3.6.4. Swift create or update an object

To create a new object, make a PUT request with the API version, account, container name and the name of the new object. You must have write permission on the container to create or update an object. The object name must be unique within the container. The PUT request is not idempotent, so if you do not use a unique name, the request will update the object. However, you can use pseudo-hierarchical syntax in the object name to distinguish it from another object of the same name if it is under a different pseudo-hierarchical directory. You can include access control headers and metadata headers in the request.

Syntax

PUT /AP_VERSION/ACCOUNT/TENANT:CONTAINER HTTP/1.1
Host: FULLY_QUALIFIED_DOMAIN_NAME
X-Auth-Token: AUTH_TOKEN

Table 3.13. Request Headers
NameDescriptionTypeRequiredValid Values

ETag

An MD5 hash of the object’s contents. Recommended.

String

No

N/A

Content-Type

The type of content the object contains.

String

No

N/A

Transfer-Encoding

Indicates whether the object is part of a larger aggregate object.

String

No

chunked

3.6.5. Swift delete an object

To delete an object, make a DELETE request with the API version, account, container and object name. You must have write permissions on the container to delete an object within it. Once you’ve successfully deleted the object, you will be able to reuse the object name.

Syntax

DELETE /API_VERSION/ACCOUNT/TENANT:CONTAINER/OBJECT HTTP/1.1
Host: FULLY_QUALIFIED_DOMAIN_NAME
X-Auth-Token: AUTH_TOKEN

3.6.6. Swift copy an object

Copying an object allows you to make a server-side copy of an object, so that you do not have to download it and upload it under another container. To copy the contents of one object to another object, you can make either a PUT request or a COPY request with the API version, account, and the container name.

For a PUT request, use the destination container and object name in the request, and the source container and object in the request header.

For a Copy request, use the source container and object in the request, and the destination container and object in the request header. You must have write permission on the container to copy an object. The destination object name must be unique within the container. The request is not idempotent, so if you do not use a unique name, the request will update the destination object. You can use pseudo-hierarchical syntax in the object name to distinguish the destination object from the source object of the same name if it is under a different pseudo-hierarchical directory. You can include access control headers and metadata headers in the request.

Syntax

PUT /AP_VERSION/ACCOUNT/TENANT:CONTAINER HTTP/1.1
X-Copy-From: TENANT:SOURCE_CONTAINER/SOURCE_OBJECT
Host: FULLY_QUALIFIED_DOMAIN_NAME
X-Auth-Token: AUTH_TOKEN

or alternatively:

Syntax

COPY /AP_VERSION/ACCOUNT/TENANT:SOURCE_CONTAINER/SOURCE_OBJECT HTTP/1.1
Destination: TENANT:DEST_CONTAINER/DEST_OBJECT

Table 3.14. Request Headers
NameDescriptionTypeRequired

X-Copy-From

Used with a PUT request to define the source container/object path.

String

Yes, if using PUT

Destination

Used with a COPY request to define the destination container/object path.

String

Yes, if using COPY

If-Modified-Since

Only copies if modified since the date/time of the source object’s last_modified attribute.

Date

No

If-Unmodified-Since

Only copies if not modified since the date/time of the source object’s last_modified attribute.

Date

No

Copy-If-Match

Copies only if the ETag in the request matches the source object’s ETag.

ETag.

No

Copy-If-None-Match

Copies only if the ETag in the request does not match the source object’s ETag.

ETag.

No

3.6.7. Swift get object metadata

To retrieve an object’s metadata, make a HEAD request with the API version, account, container and object name. You must have read permissions on the container to retrieve metadata from an object within the container. This request returns the same header information as the request for the object itself, but it does not return the object’s data.

Syntax

HEAD /AP_VERSION/ACCOUNT/TENANT:CONTAINER/OBJECT HTTP/1.1
Host: FULLY_QUALIFIED_DOMAIN_NAME
X-Auth-Token: AUTH_TOKEN

3.6.8. Swift add or update object metadata

To add metadata to an object, make a POST request with the API version, account, container and object name. You must have write permissions on the parent container to add or update metadata.

Syntax

POST /AP_VERSION/ACCOUNT/TENANT:CONTAINER/OBJECT HTTP/1.1
Host: FULLY_QUALIFIED_DOMAIN_NAME
X-Auth-Token: AUTH_TOKEN

Table 3.15. Request Headers
NameDescriptionTypeRequired

X-Object-Meta-KEY

A user-defined meta data key that takes an arbitrary string value.

String

No

3.7. Swift temporary URL operations

To allow temporary access, temp url functionality is supported by swift endpoint of radosgw. For example GET requests, to objects without the need to share credentials.

For this functionality, initially the value of X-Account-Meta-Temp-URL-Key and optionally X-Account-Meta-Temp-URL-Key-2 should be set. The Temp URL functionality relies on a HMAC-SHA1 signature against these secret keys.

3.7.1. Swift get temporary URL objects

Temporary URL uses a cryptographic HMAC-SHA1 signature, which includes the following elements:

  • The value of the Request method, "GET" for instance
  • The expiry time, in format of seconds since the epoch, that is, Unix time
  • The request path starting from "v1" onwards

The above items are normalized with newlines appended between them, and a HMAC is generated using the SHA-1 hashing algorithm against one of the Temp URL Keys posted earlier.

A sample python script to demonstrate the above is given below:

Example

import hmac
from hashlib import sha1
from time import time

method = 'GET'
host = 'https://objectstore.example.com'
duration_in_seconds = 300  # Duration for which the url is valid
expires = int(time() + duration_in_seconds)
path = '/v1/your-bucket/your-object'
key = 'secret'
hmac_body = '%s\n%s\n%s' % (method, expires, path)
hmac_body = hmac.new(key, hmac_body, sha1).hexdigest()
sig = hmac.new(key, hmac_body, sha1).hexdigest()
rest_uri = "{host}{path}?temp_url_sig={sig}&temp_url_expires={expires}".format(
     host=host, path=path, sig=sig, expires=expires)
print rest_uri

Example Output

https://objectstore.example.com/v1/your-bucket/your-object?temp_url_sig=ff4657876227fc6025f04fcf1e82818266d022c6&temp_url_expires=1423200992

3.7.2. Swift POST temporary URL keys

A POST request to the swift account with the required Key will set the secret temp URL key for the account against which temporary URL access can be provided to accounts. Up to two keys are supported, and signatures are checked against both the keys, if present, so that keys can be rotated without invalidating the temporary URLs.

Syntax

POST /API_VERSION/ACCOUNT HTTP/1.1
Host: FULLY_QUALIFIED_DOMAIN_NAME
X-Auth-Token: AUTH_TOKEN

Table 3.16. Request Headers
NameDescriptionTypeRequired

X-Account-Meta-Temp-URL-Key

A user-defined key that takes an arbitrary string value.

String

Yes

X-Account-Meta-Temp-URL-Key-2

A user-defined key that takes an arbitrary string value.

String

No

3.8. Swift multi-tenancy container operations

When a client application accesses containers, it always operates with credentials of a particular user. In Red Hat Ceph Storage cluster, every user belongs to a tenant. Consequently, every container operation has an implicit tenant in its context if no tenant is specified explicitly. Thus multi tenancy is completely backward compatible with previous releases, as long as the referred containers and referring user belong to the same tenant.

Extensions employed to specify an explicit tenant differ according to the protocol and authentication system used.

A colon character separates tenant and container, thus a sample URL would be:

Example

https://rgw.domain.com/tenant:container

By contrast, in a create_container() method, simply separate the tenant and container in the container method itself:

Example

create_container("tenant:container")

3.9. Additional Resources

Appendix A. S3 common request headers

The following table lists the valid common request headers and their descriptions.

Table A.1. Request Headers
Request HeaderDescription

CONTENT_LENGTH

Length of the request body.

DATE

Request time and date (in UTC).

HOST

The name of the host server.

AUTHORIZATION

Authorization token.

Appendix B. S3 common response status codes

The following table lists the valid common HTTP response status and its corresponding code.

Table B.1. Response Status
HTTP StatusResponse Code

100

Continue

200

Success

201

Created

202

Accepted

204

NoContent

206

Partial content

304

NotModified

400

InvalidArgument

400

InvalidDigest

400

BadDigest

400

InvalidBucketName

400

InvalidObjectName

400

UnresolvableGrantByEmailAddress

400

InvalidPart

400

InvalidPartOrder

400

RequestTimeout

400

EntityTooLarge

403

AccessDenied

403

UserSuspended

403

RequestTimeTooSkewed

404

NoSuchKey

404

NoSuchBucket

404

NoSuchUpload

405

MethodNotAllowed

408

RequestTimeout

409

BucketAlreadyExists

409

BucketNotEmpty

411

MissingContentLength

412

PreconditionFailed

416

InvalidRange

422

UnprocessableEntity

500

InternalError

Appendix C. S3 unsupported header fields

Table C.1. Unsupported Header Fields
NameType

x-amz-security-token

Request

Server

Response

x-amz-delete-marker

Response

x-amz-id-2

Response

x-amz-request-id

Response

x-amz-version-id

Response

Appendix D. Swift request headers

Table D.1. Request Headers
NameDescriptionTypeRequired

X-Auth-User

The key Ceph Object Gateway username to authenticate.

String

Yes

X-Auth-Key

The key associated to a Ceph Object Gateway username.

String

Yes

Appendix E. Swift response headers

The response from the server should include an X-Auth-Token value. The response might also contain a X-Storage-Url that provides the API_VERSION/ACCOUNT prefix that is specified in other requests throughout the API documentation.

Table E.1. Response Headers
NameDescriptionType

X-Storage-Token

The authorization token for the X-Auth-User specified in the request.

String

X-Storage-Url

The URL and API_VERSION/ACCOUNT path for the user.

String

Appendix F. Examples using the Secure Token Service APIs

These examples are using Python’s boto3 module to interface with the Ceph Object Gateway’s implementation of the Secure Token Service (STS). In these examples, TESTER2 assumes a role created by TESTER1, as to access S3 resources owned by TESTER1 based on the permission policy attached to the role.

The AssumeRole example creates a role, assigns a policy to the role, then assumes a role to get temporary credentials and access to S3 resources using those temporary credentials.

The AssumeRoleWithWebIdentity example authenticates users using an external application with Keycloak, an OpenID Connect identity provider, assumes a role to get temporary credentials and access S3 resources according to the permission policy of the role.

AssumeRole Example

import boto3

iam_client = boto3.client('iam',
aws_access_key_id=ACCESS_KEY_OF_TESTER1,
aws_secret_access_key=SECRET_KEY_OF_TESTER1,
endpoint_url=<IAM URL>,
region_name=''
)

policy_document = "{\"Version\":\"2012-10-17\",\"Statement\":[{\"Effect\":\"Allow\",\"Principal\":{\"AWS\":[\"arn:aws:iam:::user/TESTER1\"]},\"Action\":[\"sts:AssumeRole\"]}]}"

role_response = iam_client.create_role(
AssumeRolePolicyDocument=policy_document,
Path='/',
RoleName='S3Access',
)

role_policy = "{\"Version\":\"2012-10-17\",\"Statement\":{\"Effect\":\"Allow\",\"Action\":\"s3:*\",\"Resource\":\"arn:aws:s3:::*\"}}"

response = iam_client.put_role_policy(
RoleName='S3Access',
PolicyName='Policy1',
PolicyDocument=role_policy
)

sts_client = boto3.client('sts',
aws_access_key_id=ACCESS_KEY_OF_TESTER2,
aws_secret_access_key=SECRET_KEY_OF_TESTER2,
endpoint_url=<STS URL>,
region_name='',
)

response = sts_client.assume_role(
RoleArn=role_response['Role']['Arn'],
RoleSessionName='Bob',
DurationSeconds=3600
)

s3client = boto3.client('s3',
aws_access_key_id = response['Credentials']['AccessKeyId'],
aws_secret_access_key = response['Credentials']['SecretAccessKey'],
aws_session_token = response['Credentials']['SessionToken'],
endpoint_url=<S3 URL>,
region_name='',)

bucket_name = 'my-bucket'
s3bucket = s3client.create_bucket(Bucket=bucket_name)
resp = s3client.list_buckets()

AssumeRoleWithWebIdentity Example

import boto3

iam_client = boto3.client('iam',
aws_access_key_id=ACCESS_KEY_OF_TESTER1,
aws_secret_access_key=SECRET_KEY_OF_TESTER1,
endpoint_url=<IAM URL>,
region_name=''
)

policy_document = "{\"Version\":\"2012-10-17\",\"Statement\":\[\{\"Effect\":\"Allow\",\"Principal\":\{\"Federated\":\[\"arn:aws:iam:::oidc-provider/localhost:8080/auth/realms/demo\"\]\},\"Action\":\[\"sts:AssumeRoleWithWebIdentity\"\],\"Condition\":\{\"StringEquals\":\{\"localhost:8080/auth/realms/demo:app_id\":\"customer-portal\"\}\}\}\]\}"
role_response = iam_client.create_role(
AssumeRolePolicyDocument=policy_document,
Path='/',
RoleName='S3Access',
)

role_policy = "{\"Version\":\"2012-10-17\",\"Statement\":{\"Effect\":\"Allow\",\"Action\":\"s3:*\",\"Resource\":\"arn:aws:s3:::*\"}}"

response = iam_client.put_role_policy(
    RoleName='S3Access',
    PolicyName='Policy1',
    PolicyDocument=role_policy
)

sts_client = boto3.client('sts',
aws_access_key_id=ACCESS_KEY_OF_TESTER2,
aws_secret_access_key=SECRET_KEY_OF_TESTER2,
endpoint_url=<STS URL>,
region_name='',
)

response = client.assume_role_with_web_identity(
RoleArn=role_response['Role']['Arn'],
RoleSessionName='Bob',
DurationSeconds=3600,
WebIdentityToken=<Web Token>
)

s3client = boto3.client('s3',
aws_access_key_id = response['Credentials']['AccessKeyId'],
aws_secret_access_key = response['Credentials']['SecretAccessKey'],
aws_session_token = response['Credentials']['SessionToken'],
endpoint_url=<S3 URL>,
region_name='',)

bucket_name = 'my-bucket'
s3bucket = s3client.create_bucket(Bucket=bucket_name)
resp = s3client.list_buckets()

Additional Resources

  • See the Test S3 Access section of the Red Hat Ceph Storage Object Gateway Configuration and Administration Guide for more details on using Python’s boto module.

Appendix G. Examples using session tags for Attribute-based access control in STS

The following list contains examples of the usage of session tags for Attribute-based access control (ABAC) in STS.

Example of session tags that are passed in by Keycloak in the web token

{
    "jti": "947960a3-7e91-4027-99f6-da719b0d4059",
    "exp": 1627438044,
    "nbf": 0,
    "iat": 1627402044,
    "iss": "http://localhost:8080/auth/realms/quickstart",
    "aud": "app-profile-jsp",
    "sub": "test",
    "typ": "ID",
    "azp": "app-profile-jsp",
    "auth_time": 0,
    "session_state": "3a46e3e7-d198-4a64-8b51-69682bcfc670",
    "preferred_username": "test",
    "email_verified": false,
    "acr": "1",
    "https://aws.amazon.com/tags": [
        {
            "principal_tags": {
                "Department": [
                    "Engineering",
                    "Marketing"
                ]
            }
        }
    ],
    "client_id": "app-profile-jsp",
    "username": "test",
    "active": true
}

Example of aws:RequestTag

{
        "Version":"2012-10-17",
        "Statement":[
        {
            "Effect":"Allow",
            "Action":["sts:AssumeRoleWithWebIdentity","sts:TagSession"],
            "Principal":{"Federated":["arn:aws:iam:::oidc-provider/localhost:8080/auth/realms/quickstart"]},
            "Condition":{"StringEquals":{"aws:RequestTag/Department":"Engineering"}}
        }]
    }

Example of aws:PrincipalTag

{
        "Version":"2012-10-17",
        "Statement":[
        {
            "Effect":"Allow",
            "Action":["s3:*"],
        "Resource":["arn:aws:s3::t1tenant:my-test-bucket","arn:aws:s3::t1tenant:my-test-bucket/*],"+
            "Condition":{"StringEquals":{"aws:PrincipalTag/Department":"Engineering"}}
        }]
    }

Example of aws:ResourceTag

{
        "Version":"2012-10-17",
        "Statement":[
        {
            "Effect":"Allow",
            "Action":["sts:AssumeRoleWithWebIdentity","sts:TagSession"],
            "Principal":{"Federated":["arn:aws:iam:::oidc-provider/localhost:8080/auth/realms/quickstart"]},
            "Condition":{"StringEquals":{"iam:ResourceTag/Department":"Engineering"}}1
        }]
    }

1 1 1
For the above to work, you need to attach the ‘Department=Engineering’ tag to the role.

Example of aws:TagKeys

{
        "Version":"2012-10-17",
        "Statement":[
        {
            "Effect":"Allow",
            "Action":["sts:AssumeRoleWithWebIdentity","sts:TagSession"],
            "Principal":{"Federated":["arn:aws:iam:::oidc-provider/localhost:8080/auth/realms/quickstart"]},
            "Condition":{"ForAllValues:StringEquals":{"aws:TagKeys":["Marketing,Engineering"]}}1
        }]
    }

1
ForAllValues:StringEquals tests whether every tag key in the request is a subset of the tag keys in the policy. Therefore, the condition restricts the tag keys passed in the request.

Example of s3:ResourceTag

{
    "Version":"2012-10-17",
    "Statement":[
    {
        "Effect":"Allow",
        "Action":["s3:PutBucketTagging"],
        "Resource":["arn:aws:s3::t1tenant:my-test-bucket\","arn:aws:s3::t1tenant:my-test-bucket/*"]
    },
    {
        "Effect":"Allow",
        "Action":["s3:*"],
        "Resource":["*"],
        "Condition":{"StringEquals":{"s3:ResourceTag/Department":\"Engineering"}}1
    }
}

1
For the above to work, you need to attach the ‘Department=Engineering’ tag to the bucket or object on which you want this policy to be applied.

Example of aws:RequestTag with iam:ResourceTag

{
        "Version":"2012-10-17",
        "Statement":[
        {
            "Effect":"Allow",
            "Action":["sts:AssumeRoleWithWebIdentity","sts:TagSession"],
            "Principal":{"Federated":["arn:aws:iam:::oidc-provider/localhost:8080/auth/realms/quickstart"]},
            "Condition":{"StringEquals":{"aws:RequestTag/Department":"${iam:ResourceTag/Department}"}}1
        }]
    }

1
This is to assume a role by matching the tags in the incoming request with the tag attached to the role. aws:RequestTag is the incoming tag in the JSON Web Token (JWT) and iam:ResourceTag is the tag attached to the role being assumed.

Example of aws:PrincipalTag with s3:ResourceTag

{
    "Version":"2012-10-17",
    "Statement":[
    {
        "Effect":"Allow",
        "Action":["s3:PutBucketTagging"],
        "Resource":["arn:aws:s3::t1tenant:my-test-bucket\","arn:aws:s3::t1tenant:my-test-bucket/*"]
    },
    {
        "Effect":"Allow",
        "Action":["s3:*"],
        "Resource":["*"],
        "Condition":{"StringEquals":{"s3:ResourceTag/Department":"${aws:PrincipalTag/Department}"}}1
    }
}

1
This is to evaluate a role permission policy by matching principal tags with S3 resource tags. aws:PrincipalTag is the tag passed in along with the temporary credentials and s3:ResourceTag is the tag attached to the S3 resource, that is object or bucket.

Appendix H. Sample code demonstrating usage of session tags

The following is a sample code for tagging a role, bucket, or an object and using tag keys in a role trust and role permission policy.

Note

The example assumes that a tag Department=Engineering is passed in the JSON Web Token (JWT) access token by Keycloak.

# -*- coding: utf-8 -*-

import boto3
import json
from nose.tools import eq_ as eq

access_key = 'TESTER'
secret_key = 'test123'
endpoint = 'http://s3.us-east.localhost:8000'

s3client = boto3.client('s3',
aws_access_key_id = access_key,
aws_secret_access_key = secret_key,
endpoint_url = endpoint,
region_name='',)

s3res = boto3.resource('s3',
        aws_access_key_id = access_key,
        aws_secret_access_key = secret_key,
        endpoint_url = endpoint,
        region_name='',)

iam_client = boto3.client('iam',
aws_access_key_id=access_key,
aws_secret_access_key=secret_key,
endpoint_url=endpoint,
region_name=''
)

bucket_name = 'test-bucket'
s3bucket = s3client.create_bucket(Bucket=bucket_name)

bucket_tagging = s3res.BucketTagging(bucket_name)
Set_Tag = bucket_tagging.put(Tagging={'TagSet':[{'Key':'Department', 'Value': 'Engineering'}]})
try:
    response = iam_client.create_open_id_connect_provider(
        Url='http://localhost:8080/auth/realms/quickstart',
        ClientIDList=[
            'app-profile-jsp',
            'app-jee-jsp'
        ],
        ThumbprintList=[
            'F7D7B3515DD0D319DD219A43A9EA727AD6065287'
    ]
    )
except ClientError as e:
    print ("Provider already exists")

policy_document = "{\"Version\":\"2012-10-17\",\"Statement\":[{\"Effect\":\"Allow\",\"Principal\":{\"Federated\":[\"arn:aws:iam:::oidc-provider/localhost:8080/auth/realms/quickstart\"]},\"Action\":[\"sts:AssumeRoleWithWebIdentity\",\"sts:TagSession\"],\"Condition\":{\"StringEquals\":{\"aws:RequestTag/Department\":\"${iam:ResourceTag/Department}\"}}}]}"
role_response = ""

print ("\n Getting Role \n")

try:
    role_response = iam_client.get_role(
        RoleName='S3Access'
    )
    print (role_response)
except ClientError as e:
    if e.response['Code'] == 'NoSuchEntity':
        print ("\n Creating Role \n")
        tags_list = [
            {'Key':'Department','Value':'Engineering'},
        ]
        role_response = iam_client.create_role(
            AssumeRolePolicyDocument=policy_document,
            Path='/',
            RoleName='S3Access',
            Tags=tags_list,
        )
        print (role_response)
    else:
        print("Unexpected error: %s" % e)

role_policy = "{\"Version\":\"2012-10-17\",\"Statement\":{\"Effect\":\"Allow\",\"Action\":\"s3:*\",\"Resource\":\"arn:aws:s3:::*\",\"Condition\":{\"StringEquals\":{\"s3:ResourceTag/Department\":[\"${aws:PrincipalTag/Department}\"]}}}}"

response = iam_client.put_role_policy(
            RoleName='S3Access',
            PolicyName='Policy1',
            PolicyDocument=role_policy
        )

sts_client = boto3.client('sts',
aws_access_key_id='abc',
aws_secret_access_key='def',
endpoint_url = endpoint,
region_name = '',
)


print ("\n Assuming Role with Web Identity\n")
response = sts_client.assume_role_with_web_identity(
RoleArn=role_response['Role']['Arn'],
RoleSessionName='Bob',
DurationSeconds=900,
WebIdentityToken='<web-token>')

s3client2 = boto3.client('s3',
aws_access_key_id = response['Credentials']['AccessKeyId'],
aws_secret_access_key = response['Credentials']['SecretAccessKey'],
aws_session_token = response['Credentials']['SessionToken'],
endpoint_url='http://s3.us-east.localhost:8000',
region_name='',)

bucket_body = 'this is a test file'
tags = 'Department=Engineering'
key = "test-1.txt"
s3_put_obj = s3client2.put_object(Body=bucket_body, Bucket=bucket_name, Key=key, Tagging=tags)
eq(s3_put_obj['ResponseMetadata']['HTTPStatusCode'],200)

s3_get_obj = s3client2.get_object(Bucket=bucket_name, Key=key)
eq(s3_get_obj['ResponseMetadata']['HTTPStatusCode'],200)

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