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Appendix A. Configuration reference


As a storage administrator, you can set various options for the Ceph Object Gateway. These options contain default values. If you do not specify each option, then the default value is set automatically.

To set specific values for these options, update the configuration database by using the ceph config set client.rgw OPTION VALUE command.

A.1. General settings

NameDescriptionTypeDefault

rgw_data

Sets the location of the data files for Ceph Object Gateway.

String

/var/lib/ceph/radosgw/$cluster-$id

rgw_enable_apis

Enables the specified APIs.

String

s3, s3website, swift, swift_auth, admin, sts, iam, notifications

rgw_cache_enabled

Whether the Ceph Object Gateway cache is enabled.

Boolean

true

rgw_cache_lru_size

The number of entries in the Ceph Object Gateway cache.

Integer

10000

rgw_socket_path

The socket path for the domain socket. FastCgiExternalServer uses this socket. If you do not specify a socket path, Ceph Object Gateway will not run as an external server. The path you specify here must be the same as the path specified in the rgw.conf file.

String

N/A

rgw_host

The host for the Ceph Object Gateway instance. Can be an IP address or a hostname.

String

0.0.0.0

rgw_port

Port the instance listens for requests. If not specified, Ceph Object Gateway runs external FastCGI.

String

None

rgw_dns_name

The DNS name of the served domain. See also the hostnames setting within zone groups.

String

None

rgw_script_uri

The alternative value for the SCRIPT_URI if not set in the request.

String

None

rgw_request_uri

The alternative value for the REQUEST_URI if not set in the request.

String

None

rgw_print_continue

Enable 100-continue if it is operational.

Boolean

true

rgw_remote_addr_param

The remote address parameter. For example, the HTTP field containing the remote address, or the X-Forwarded-For address if a reverse proxy is operational.

String

REMOTE_ADDR

rgw_op_thread_timeout

The timeout in seconds for open threads.

Integer

600

rgw_op_thread_suicide_timeout

The timeout in seconds before a Ceph Object Gateway process dies. Disabled if set to 0.

Integer

0

rgw_thread_pool_size

The size of the thread pool.

Integer

512 threads.

rgw_num_control_oids

The number of notification objects used for cache synchronization between different rgw instances.

Integer

8

rgw_init_timeout

The number of seconds before Ceph Object Gateway gives up on initialization.

Integer

30

rgw_mime_types_file

The path and location of the MIME types. Used for Swift auto-detection of object types.

String

/etc/mime.types

rgw_gc_max_objs

The maximum number of objects that may be handled by garbage collection in one garbage collection processing cycle.

Integer

32

rgw_gc_obj_min_wait

The minimum wait time before the object may be removed and handled by garbage collection processing.

Integer

2 * 3600

rgw_gc_processor_max_time

The maximum time between the beginning of two consecutive garbage collection processing cycles.

Integer

3600

rgw_gc_processor_period

The cycle time for garbage collection processing.

Integer

3600

rgw_s3 success_create_obj_status

The alternate success status response for create-obj.

Integer

0

rgw_resolve_cname

Whether rgw should use the DNS CNAME record of the request hostname field (if hostname is not equal to rgw_dns name).

Boolean

false

rgw_object_stripe_size

The size of an object stripe for Ceph Object Gateway objects.

Integer

4 << 20

rgw_extended_http_attrs

Add a new set of attributes that could be set on an object. These extra attributes can be set through HTTP header fields when putting the objects. If set, these attributes will return as HTTP fields when doing GET/HEAD on the object.

String

None. For example: "content_foo, content_bar"

rgw_exit_timeout_secs

Number of seconds to wait for a process before exiting unconditionally.

Integer

120

rgw_get_obj_window_size

The window size in bytes for a single object request.

Integer

16 << 20

rgw_get_obj_max_req_size

The maximum request size of a single get operation sent to the Ceph Storage Cluster.

Integer

4 << 20

rgw_relaxed_s3_bucket_names

Enables relaxed S3 bucket names rules for zone group buckets.

Boolean

false

rgw_list buckets_max_chunk

The maximum number of buckets to retrieve in a single operation when listing user buckets.

Integer

1000

rgw_override_bucket_index_max_shards

The number of shards for the bucket index object. A value of 0 indicates there is no sharding. Red Hat does not recommend setting a value too large (for example, 1000) as it increases the cost for bucket listing.

This variable should be set in the [client] or the [global] section so it is automatically applied to radosgw-admin commands.

Integer

0

rgw_curl_wait_timeout_ms

The timeout in milliseconds for certain curl calls.

Integer

1000

rgw_copy_obj_progress

Enables output of object progress during long copy operations.

Boolean

true

rgw_copy_obj_progress_every_bytes

The minimum bytes between copy progress output.

Integer

1024 * 1024

rgw_admin_entry

The entry point for an admin request URL.

String

admin

rgw_content_length_compat

Enable compatibility handling of FCGI requests with both CONTENT_LENGTH AND HTTP_CONTENT_LENGTH set.

Boolean

false

rgw_bucket_default_quota_max_objects

The default maximum number of objects per bucket. This value is set on new users if no other quota is specified. It has no effect on existing users.

This variable should be set in the [client] or the [global] section so it is automatically applied to radosgw-admin commands.

Integer

-1

rgw_bucket_quota_ttl

The amount of time in seconds cached quota information is trusted. After this timeout, the quota information will be re-fetched from the cluster.

Integer

600

rgw_user_quota_bucket_sync_interval

The amount of time in seconds bucket quota information is accumulated before syncing to the cluster. During this time, other RGW instances will not see the changes in bucket quota stats from operations on this instance.

Integer

180

rgw_user_quota_sync_interval

The amount of time in seconds user quota information is accumulated before syncing to the cluster. During this time, other RGW instances will not see the changes in user quota stats from operations on this instance.

Integer

3600 * 24

log_meta

A zone parameter to determine whether or not the gateway logs the metadata operations.

Boolean

false

log_data

A zone parameter to determine whether or not the gateway logs the data operations.

Boolean

false

sync_from_all

A radosgw-admin command to set or unset whether zone syncs from all zonegroup peers.

Boolean

false

A.2. About pools

Ceph zones map to a series of Ceph Storage Cluster pools.

Manually Created Pools vs. Generated Pools

If the user key for the Ceph Object Gateway contains write capabilities, the gateway has the ability to create pools automatically. This is convenient for getting started. However, the Ceph Object Storage Cluster uses the placement group default values unless they were set in the Ceph configuration file. Additionally, Ceph will use the default CRUSH hierarchy. These settings are NOT ideal for production systems.

The default pools for the Ceph Object Gateway’s default zone include:

  • .rgw.root
  • .default.rgw.control
  • .default.rgw.meta
  • .default.rgw.log
  • .default.rgw.buckets.index
  • .default.rgw.buckets.data
  • .default.rgw.buckets.non-ec

The Ceph Object Gateway creates pools on a per zone basis. If you create the pools manually, prepend the zone name. The system pools store objects related to, for example, system control, logging, and user information. By convention, these pool names have the zone name prepended to the pool name.

  • .<zone-name>.rgw.control: The control pool.
  • .<zone-name>.log: The log pool contains logs of all bucket/container and object actions, such as create, read, update, and delete.
  • .<zone-name>.rgw.buckets.index: This pool stores the index of the buckets.
  • .<zone-name>.rgw.buckets.data: This pool stores the data of the buckets.
  • .<zone-name>.rgw.meta: The metadata pool stores user_keys and other critical metadata.
  • .<zone-name>.meta:users.uid: The user ID pool contains a map of unique user IDs.
  • .<zone-name>.meta:users.keys: The keys pool contains access keys and secret keys for each user ID.
  • .<zone-name>.meta:users.email: The email pool contains email addresses associated with a user ID.
  • .<zone-name>.meta:users.swift: The Swift pool contains the Swift subuser information for a user ID.

Ceph Object Gateways store data for the bucket index (index_pool) and bucket data (data_pool) in placement pools. These may overlap; that is, you may use the same pool for the index and the data. The index pool for default placement is {zone-name}.rgw.buckets.index and for the data pool for default placement is {zone-name}.rgw.buckets.

NameDescriptionTypeDefault

rgw_zonegroup_root_pool

The pool for storing all zone group-specific information.

String

.rgw.root

rgw_zone_root_pool

The pool for storing zone-specific information.

String

.rgw.root

A.3. Lifecycle settings

As a storage administrator, you can set various bucket lifecycle options for a Ceph Object Gateway. These options contain default values. If you do not specify each option, then the default value is set automatically.

To set specific values for these options, update the configuration database by using the ceph config set client.rgw OPTION VALUE command.

NameDescriptionTypeDefault

rgw_lc_debug_interval

For developer use only to debug lifecycle rules by scaling expiration rules from days into an interval in seconds. Red Hat recommends that this option not be used in a production cluster.

Integer

-1

rgw_lc_lock_max_time

The timeout value used internally by the Ceph Object Gateway.

Integer

90

rgw_lc_max_objs

Controls the sharding of the RADOS Gateway internal lifecycle work queues, and should only be set as part of a deliberate resharding workflow. Red Hat recommends not changing this setting after the setup of your cluster, without first contacting Red Hat support.

Integer

32

rgw_lc_max_rules

The number of lifecycle rules to include in one, per bucket, lifecycle configuration document. The Amazon Web Service (AWS) limit is 1000 rules.

Integer

1000

rgw_lc_max_worker

The number of lifecycle worker threads to run in parallel, processing bucket and index shards simultaneously. Red Hat does not recommend setting a value larger than 10 without contacting Red Hat support.

Integer

3

rgw_lc_max_wp_worker

The number of buckets that each lifecycle worker thread can process in parallel. Red Hat does not recommend setting a value larger than 10 without contacting Red Hat Support.

Integer

3

rgw_lc_thread_delay

A delay, in milliseconds, that can be injected into shard processing at several points. The default value is 0. Setting a value from 10 to 100 ms would reduce CPU utilization on RADOS Gateway instances and reduce the proportion of workload capacity of lifecycle threads relative to ingest if saturation is being observed.

Integer

0

A.4. Swift settings

NameDescriptionTypeDefault

rgw_enforce_swift_acls

Enforces the Swift Access Control List (ACL) settings.

Boolean

true

rgw_swift_token_expiration

The time in seconds for expiring a Swift token.

Integer

24 * 3600

rgw_swift_url

The URL for the Ceph Object Gateway Swift API.

String

None

rgw_swift_url_prefix

The URL prefix for the Swift API, for example, http://fqdn.com/swift.

swift

N/A

rgw_swift_auth_url

Default URL for verifying v1 auth tokens (if not using internal Swift auth).

String

None

rgw_swift_auth_entry

The entry point for a Swift auth URL.

String

auth

A.5. Logging settings

NameDescriptionTypeDefault

debug_rgw_datacache

Low level D3N logs can be enabled by the debug_rgw_datacache subsystem (up to debug_rgw_datacache=30)

Integer

1/5

rgw_log_nonexistent_bucket

Enables Ceph Object Gateway to log a request for a non-existent bucket.

Boolean

false

rgw_log_object_name

The logging format for an object name. See manpage date for details about format specifiers.

Date

%Y-%m-%d-%H-%i-%n

rgw_log_object_name_utc

Whether a logged object name includes a UTC time. If false, it uses the local time.

Boolean

false

rgw_usage_max_shards

The maximum number of shards for usage logging.

Integer

32

rgw_usage_max_user_shards

The maximum number of shards used for a single user’s usage logging.

Integer

1

rgw_enable_ops_log

Enable logging for each successful Ceph Object Gateway operation.

Boolean

false

rgw_enable_usage_log

Enable the usage log.

Boolean

false

rgw_ops_log_rados

Whether the operations log should be written to the Ceph Storage Cluster backend.

Boolean

true

rgw_ops_log_socket_path

The Unix domain socket for writing operations logs.

String

None

rgw_ops_log_data-backlog

The maximum data backlog data size for operations logs written to a Unix domain socket.

Integer

5 << 20

rgw_usage_log_flush_threshold

The number of dirty merged entries in the usage log before flushing synchronously.

Integer

1024

rgw_usage_log_tick_interval

Flush pending usage log data every n seconds.

Integer

30

rgw_intent_log_object_name

The logging format for the intent log object name. See manpage date for details about format specifiers.

Date

%Y-%m-%d-%i-%n

rgw_intent_log_object_name_utc

Whether the intent log object name includes a UTC time. If false, it uses the local time.

Boolean

false

rgw_data_log_window

The data log entries window in seconds.

Integer

30

rgw_data_log_changes_size

The number of in-memory entries to hold for the data changes log.

Integer

1000

rgw_data_log_num_shards

The number of shards (objects) on which to keep the data changes log.

Integer

128

rgw_data_log_obj_prefix

The object name prefix for the data log.

String

data_log

rgw_replica_log_obj_prefix

The object name prefix for the replica log.

String

replica log

rgw_md_log_max_shards

The maximum number of shards for the metadata log.

Integer

64

rgw_log_http_headers

Comma-delimited list of HTTP headers to include with ops log entries. Header names are case insensitive, and use the full header name with words separated by underscores.

String

None

Note

Changing the rgw_data_log_num_shards value is not supported.

A.6. Keystone settings

NameDescriptionTypeDefault

rgw_keystone_url

The URL for the Keystone server.

String

None

rgw_keystone_admin_token

The Keystone admin token (shared secret).

String

None

rgw_keystone_accepted_roles

The roles required to serve requests.

String

Member, admin

rgw_keystone_token_cache_size

The maximum number of entries in each Keystone token cache.

Integer

10000

A.7. Keystone integration configuration options

You can integrate your configuration options into Keystone. See below for a detailed description of the available Keystone integration configuration options:

Important

After updating the Ceph configuration file, you must copy the new Ceph configuration file to all Ceph nodes in the storage cluster.

rgw_s3_auth_use_keystone

Description
If set to true, the Ceph Object Gateway will authenticate users using Keystone.
Type
Boolean
Default
false

nss_db_path

Description
The path to the NSS database.
Type
String
Default
""

rgw_keystone_url

Description
The URL for the administrative RESTful API on the Keystone server.
Type
String
Default
""

rgw_keystone_admin_token

Description
The token or shared secret that is configured internally in Keystone for administrative requests.
Type
String
Default
""

rgw_keystone_admin_user

Description
The keystone admin user name.
Type
String
Default
""

rgw_keystone_admin_password

Description
The keystone admin user password.
Type
String
Default
""

rgw_keystone_admin_tenant

Description
The Keystone admin user tenant for keystone v2.0.
Type
String
Default
""

rgw_keystone_admin_project

Description
the keystone admin user project for keystone v3.
Type
String
Default
""

rgw_trust_forwarded_https

Description
When a proxy in front of the Ceph Object Gateway is used for SSL termination, it does not whether incoming http connections are secure. Enable this option to trust the forwarded and X-forwarded headers sent by the proxy when determining when the connection is secure. This is mainly required for server-side encryption.
Type
Boolean
Default
false

rgw_swift_account_in_url

Description
Whether the Swift account is encoded in the URL path. You must set this option to true and update the Keystone service catalog if you want the Ceph Object Gateway to support publicly-readable containers and temporary URLs.
Type
Boolean
Default
false

rgw_keystone_admin_domain

Description
The Keystone admin user domain.
Type
String
Default
""

rgw_keystone_api_version

Description
The version of the Keystone API to use. Valid options are 2 or 3.
Type
Integer
Default
2

rgw_keystone_accepted_roles

Description
The roles required to serve requests.
Type
String
Default
member, Member, admin,

rgw_keystone_accepted_admin_roles

Description
The list of roles allowing a user to gain administrative privileges.
Type
String
Default
ResellerAdmin, swiftoperator

rgw_keystone_token_cache_size

Description
The maximum number of entries in the Keystone token cache.
Type
Integer
Default
10000

rgw_keystone_verify_ssl

Description
If true Ceph will try to verify Keystone’s SSL certificate.
Type
Boolean
Default
true

rgw_keystone_implicit_tenants

Description
Create new users in their own tenants of the same name. Set this to true or false under most circumstances. For compatibility with previous versions of Red Hat Ceph Storage, it is also possible to set this to s3 or swift. This has the effect of splitting the identity space such that only the indicated protocol will use implicit tenants. Some older versions of Red Hat Ceph Storage only supported implicit tenants with Swift.
Type
String
Default
false

rgw_max_attr_name_len

Description
The maximum length of metadata name. 0 skips the check.
Type
Size
Default
0

rgw_max_attrs_num_in_req

Description
The maximum number of metadata items that can be put with a single request.
Type
uint
Default
0

rgw_max_attr_size

Description
The maximum length of metadata value. 0 skips the check
Type
Size
Default
0

rgw_swift_versioning_enabled

Description
Enable Swift versioning.
Type
Boolean
Default
0 or 1

rgw_keystone_accepted_reader_roles

Description
List of roles that can only be used for reads.
Type
String
Default
""

rgw_swift_enforce_content_length

Description
Send content length when listing containers
Type
String
Default
false`

A.8. LDAP settings

NameDescriptionTypeExample

rgw_ldap_uri

A space-separated list of LDAP servers in URI format.

String

ldaps://<ldap.your.domain>

rgw_ldap_searchdn

The LDAP search domain name, also known as base domain.

String

cn=users,cn=accounts,dc=example,dc=com

rgw_ldap_binddn

The gateway will bind with this LDAP entry (user match).

String

uid=admin,cn=users,dc=example,dc=com

rgw_ldap_secret

A file containing credentials for rgw_ldap_binddn.

String

/etc/openldap/secret

rgw_ldap_dnattr

LDAP attribute containing Ceph object gateway user names (to form binddns).

String

uid

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