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Chapter 2. Using the configuration API

The configuration tool exposes 4 endpoints that can be used to build, validate, bundle and deploy a configuration. The config-tool API is documented at https://github.com/quay/config-tool/blob/master/pkg/lib/editor/API.md. In this section, you will see how to use the API to retrieve the current configuration and how to validate any changes you make.

2.1. Retrieving the default configuration
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If you are running the configuration tool for the first time, and do not have an existing configuration, you can retrieve the default configuration. Start the container in config mode: 

$ sudo podman run --rm -it --name quay_config \
  -p 8080:8080 \
  registry.redhat.io/quay/quay-rhel8:v3.15.1 config secret
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Use the config endpoint of the configuration API to get the default: 

$ curl -X GET -u quayconfig:secret http://quay-server:8080/api/v1/config  | jq
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The value returned is the default configuration in JSON format: 

{
  "config.yaml": {
    "AUTHENTICATION_TYPE": "Database",
    "AVATAR_KIND": "local",
    "DB_CONNECTION_ARGS": {
      "autorollback": true,
      "threadlocals": true
    },
    "DEFAULT_TAG_EXPIRATION": "2w",
    "EXTERNAL_TLS_TERMINATION": false,
    "FEATURE_ACTION_LOG_ROTATION": false,
    "FEATURE_ANONYMOUS_ACCESS": true,
    "FEATURE_APP_SPECIFIC_TOKENS": true,
    ....
  }

}
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2.2. Retrieving the current configuration
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If you have already configured and deployed the Quay registry, stop the container and restart it in configuration mode, loading the existing configuration as a volume: 

$ sudo podman run --rm -it --name quay_config \
  -p 8080:8080 \
  -v $QUAY/config:/conf/stack:Z \
  registry.redhat.io/quay/quay-rhel8:v3.15.1 config secret
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Use the config endpoint of the API to get the current configuration: 

$ curl -X GET -u quayconfig:secret http://quay-server:8080/api/v1/config  | jq
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The value returned is the current configuration in JSON format, including database and Redis configuration data: 

{
  "config.yaml": {
    ....
    "BROWSER_API_CALLS_XHR_ONLY": false,
    "BUILDLOGS_REDIS": {
      "host": "quay-server",
      "password": "strongpassword",
      "port": 6379
    },
    "DATABASE_SECRET_KEY": "4b1c5663-88c6-47ac-b4a8-bb594660f08b",
    "DB_CONNECTION_ARGS": {
      "autorollback": true,
      "threadlocals": true
    },
    "DB_URI": "postgresql://quayuser:quaypass@quay-server:5432/quay",
    "DEFAULT_TAG_EXPIRATION": "2w",
    ....


  }

}
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2.3. Validating configuration using the API
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You can validate a configuration by posting it to the config/validate endpoint: 

curl -u quayconfig:secret --header 'Content-Type: application/json' --request POST --data '
{
  "config.yaml": {
    ....
    "BROWSER_API_CALLS_XHR_ONLY": false,
    "BUILDLOGS_REDIS": {
      "host": "quay-server",
      "password": "strongpassword",
      "port": 6379
    },
    "DATABASE_SECRET_KEY": "4b1c5663-88c6-47ac-b4a8-bb594660f08b",
    "DB_CONNECTION_ARGS": {
      "autorollback": true,
      "threadlocals": true
    },
    "DB_URI": "postgresql://quayuser:quaypass@quay-server:5432/quay",
    "DEFAULT_TAG_EXPIRATION": "2w",
    ....

  }

} http://quay-server:8080/api/v1/config/validate | jq
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The returned value is an array containing the errors found in the configuration. If the configuration is valid, an empty array [] is returned.

2.4. Determining the required fields
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You can determine the required fields by posting an empty configuration structure to the config/validate endpoint: 

curl -u quayconfig:secret --header 'Content-Type: application/json' --request POST --data '
{
  "config.yaml": {
  }

} http://quay-server:8080/api/v1/config/validate | jq
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The value returned is an array indicating which fields are required: 

[
  {
    "FieldGroup": "Database",
    "Tags": [
      "DB_URI"
    ],
    "Message": "DB_URI is required."
  },
  {
    "FieldGroup": "DistributedStorage",
    "Tags": [
      "DISTRIBUTED_STORAGE_CONFIG"
    ],
    "Message": "DISTRIBUTED_STORAGE_CONFIG must contain at least one storage location."
  },
  {
    "FieldGroup": "HostSettings",
    "Tags": [
      "SERVER_HOSTNAME"
    ],
    "Message": "SERVER_HOSTNAME is required"
  },
  {
    "FieldGroup": "HostSettings",
    "Tags": [
      "SERVER_HOSTNAME"
    ],
    "Message": "SERVER_HOSTNAME must be of type Hostname"
  },
  {
    "FieldGroup": "Redis",
    "Tags": [
      "BUILDLOGS_REDIS"
    ],
    "Message": "BUILDLOGS_REDIS is required"
  }
]
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