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garage/doc/drafts/admin-api.md
Alex Auvolat 5ea5fd2130
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Always return 200 OK on /v0/health, reinstate admin api doc as draft and complete it
2022-12-11 18:11:28 +01:00

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+++ title = "Administration API" weight = 60 +++

The Garage administration API is accessible through a dedicated server whose listen address is specified in the [admin] section of the configuration file (see configuration file reference)

WARNING. At this point, there is no comittement to stability of the APIs described in this document. We will bump the version numbers prefixed to each API endpoint at each time the syntax or semantics change, meaning that code that relies on these endpoint will break when changes are introduced.

The Garage administration API was introduced in version 0.7.2, this document does not apply to older versions of Garage.

Access control

The admin API uses two different tokens for acces control, that are specified in the config file's [admin] section:

  • metrics_token: the token for accessing the Metrics endpoint (if this token is not set in the config file, the Metrics endpoint can be accessed without access control);

  • admin_token: the token for accessing all of the other administration endpoints (if this token is not set in the config file, access to these endpoints is disabled entirely).

These tokens are used as simple HTTP bearer tokens. In other words, to authenticate access to an admin API endpoint, add the following HTTP header to your request:

Authorization: Bearer <token>

Administration API endpoints

Metrics-related endpoints

Metrics GET /metrics

Returns internal Garage metrics in Prometheus format.

Health GET /health

Used for simple health checks in a cluster setting with an orchestrator. Returns an HTTP status 200 if the node is ready to answer user's requests, and an HTTP status 503 (Service Unavailable) if there are some partitions for which a quorum of nodes is not available. A simple textual message is also returned in a body with content-type text/plain. See /v0/health for an API that also returns JSON output.

Cluster operations

GetClusterStatus GET /v0/status

Returns the cluster's current status in JSON, including:

  • ID of the node being queried and its version of the Garage daemon
  • Live nodes
  • Currently configured cluster layout
  • Staged changes to the cluster layout

Example response body:

{
  "node": "ec79480e0ce52ae26fd00c9da684e4fa56658d9c64cdcecb094e936de0bfe71f",
  "garage_version": "git:v0.8.0",
  "knownNodes": {
    "ec79480e0ce52ae26fd00c9da684e4fa56658d9c64cdcecb094e936de0bfe71f": {
      "addr": "10.0.0.11:3901",
      "is_up": true,
      "last_seen_secs_ago": 9,
      "hostname": "node1"
    },
    "4a6ae5a1d0d33bf895f5bb4f0a418b7dc94c47c0dd2eb108d1158f3c8f60b0ff": {
      "addr": "10.0.0.12:3901",
      "is_up": true,
      "last_seen_secs_ago": 1,
      "hostname": "node2"
    },
    "23ffd0cdd375ebff573b20cc5cef38996b51c1a7d6dbcf2c6e619876e507cf27": {
      "addr": "10.0.0.21:3901",
      "is_up": true,
      "last_seen_secs_ago": 7,
      "hostname": "node3"
    },
    "e2ee7984ee65b260682086ec70026165903c86e601a4a5a501c1900afe28d84b": {
      "addr": "10.0.0.22:3901",
      "is_up": true,
      "last_seen_secs_ago": 1,
      "hostname": "node4"
    }
  },
  "layout": {
    "version": 12,
    "roles": {
      "ec79480e0ce52ae26fd00c9da684e4fa56658d9c64cdcecb094e936de0bfe71f": {
        "zone": "dc1",
        "capacity": 4,
        "tags": [
          "node1"
        ]
      },
      "4a6ae5a1d0d33bf895f5bb4f0a418b7dc94c47c0dd2eb108d1158f3c8f60b0ff": {
        "zone": "dc1",
        "capacity": 6,
        "tags": [
          "node2"
        ]
      },
      "23ffd0cdd375ebff573b20cc5cef38996b51c1a7d6dbcf2c6e619876e507cf27": {
        "zone": "dc2",
        "capacity": 10,
        "tags": [
          "node3"
        ]
      }
    },
    "stagedRoleChanges": {
      "e2ee7984ee65b260682086ec70026165903c86e601a4a5a501c1900afe28d84b": {
        "zone": "dc2",
        "capacity": 5,
        "tags": [
          "node4"
        ]
      }
    }
  }
}

GetClusterHealth GET /v0/health

Returns the cluster's current health in JSON format, with the following variables:

  • status: one of Healthy, Degraded or Unavailable:
    • Healthy: Garage node is connected to all storage nodes
    • Degraded: Garage node is not connected to all storage nodes, but a quorum of write nodes is available for all partitions
    • Unavailable: a quorum of write nodes is not available for some partitions
  • known_nodes: the number of nodes this Garage node has had a TCP connection to since the daemon started
  • connected_nodes: the nubmer of nodes this Garage node currently has an open connection to
  • storage_nodes: the number of storage nodes currently registered in the cluster layout
  • storage_nodes_ok: the number of storage nodes to which a connection is currently open
  • partitions: the total number of partitions of the data (currently always 256)
  • partitions_quorum: the number of partitions for which a quorum of write nodes is available
  • partitions_all_ok: the number of partitions for which we are connected to all storage nodes responsible of storing it

Contrarily to GET /health, this endpoint always returns a 200 OK HTTP response code.

Example response body:

{
    "status": "Degraded",
    "known_nodes": 3,
    "connected_nodes": 2,
    "storage_nodes": 3,
    "storage_nodes_ok": 2,
    "partitions": 256,
    "partitions_quorum": 256,
    "partitions_all_ok": 0
}

ConnectClusterNodes POST /v0/connect

Instructs this Garage node to connect to other Garage nodes at specified addresses.

Example request body:

[
    "ec79480e0ce52ae26fd00c9da684e4fa56658d9c64cdcecb094e936de0bfe71f@10.0.0.11:3901",
    "4a6ae5a1d0d33bf895f5bb4f0a418b7dc94c47c0dd2eb108d1158f3c8f60b0ff@10.0.0.12:3901"
]

The format of the string for a node to connect to is: <node ID>@<ip address>:<port>, same as in the garage node connect CLI call.

Example response:

[
    {
        "success": true,
        "error": null
    },
    {
        "success": false,
        "error": "Handshake error"
    }
]

GetClusterLayout GET /v0/layout

Returns the cluster's current layout in JSON, including:

  • Currently configured cluster layout
  • Staged changes to the cluster layout

(the info returned by this endpoint is a subset of the info returned by GetClusterStatus)

Example response body:

{
  "version": 12,
  "roles": {
    "ec79480e0ce52ae26fd00c9da684e4fa56658d9c64cdcecb094e936de0bfe71f": {
      "zone": "dc1",
      "capacity": 4,
      "tags": [
        "node1"
      ]
    },
    "4a6ae5a1d0d33bf895f5bb4f0a418b7dc94c47c0dd2eb108d1158f3c8f60b0ff": {
      "zone": "dc1",
      "capacity": 6,
      "tags": [
        "node2"
      ]
    },
    "23ffd0cdd375ebff573b20cc5cef38996b51c1a7d6dbcf2c6e619876e507cf27": {
      "zone": "dc2",
      "capacity": 10,
      "tags": [
        "node3"
      ]
    }
  },
  "stagedRoleChanges": {
    "e2ee7984ee65b260682086ec70026165903c86e601a4a5a501c1900afe28d84b": {
      "zone": "dc2",
      "capacity": 5,
      "tags": [
        "node4"
      ]
    }
  }
}

UpdateClusterLayout POST /v0/layout

Send modifications to the cluster layout. These modifications will be included in the staged role changes, visible in subsequent calls of GetClusterLayout. Once the set of staged changes is satisfactory, the user may call ApplyClusterLayout to apply the changed changes, or Revert ClusterLayout to clear all of the staged changes in the layout.

Request body format:

{
  <node_id>: {
    "capacity": <new_capacity>,
    "zone": <new_zone>,
    "tags": [
      <new_tag>,
      ...
    ]
  },
  <node_id_to_remove>: null,
  ...
}

Contrary to the CLI that may update only a subset of the fields capacity, zone and tags, when calling this API all of these values must be specified.

ApplyClusterLayout POST /v0/layout/apply

Applies to the cluster the layout changes currently registered as staged layout changes.

Request body format:

{
  "version": 13
}

Similarly to the CLI, the body must include the version of the new layout that will be created, which MUST be 1 + the value of the currently existing layout in the cluster.

RevertClusterLayout POST /v0/layout/revert

Clears all of the staged layout changes.

Request body format:

{
  "version": 13
}

Reverting the staged changes is done by incrementing the version number and clearing the contents of the staged change list. Similarly to the CLI, the body must include the incremented version number, which MUST be 1 + the value of the currently existing layout in the cluster.

Access key operations

ListKeys GET /v0/key

Returns all API access keys in the cluster.

Example response:

[
  {
    "id": "GK31c2f218a2e44f485b94239e",
    "name": "test"
  },
  {
    "id": "GKe10061ac9c2921f09e4c5540",
    "name": "test2"
  }
]

CreateKey POST /v0/key

Creates a new API access key.

Request body format:

{
    "name": "NameOfMyKey"
}

ImportKey POST /v0/key/import

Imports an existing API key.

Request body format:

{
    "accessKeyId": "GK31c2f218a2e44f485b94239e",
    "secretAccessKey": "b892c0665f0ada8a4755dae98baa3b133590e11dae3bcc1f9d769d67f16c3835",
    "name": "NameOfMyKey"
}

GetKeyInfo GET /v0/key?id=<acces key id>

GetKeyInfo GET /v0/key?search=<pattern>

Returns information about the requested API access key.

If id is set, the key is looked up using its exact identifier (faster). If search is set, the key is looked up using its name or prefix of identifier (slower, all keys are enumerated to do this).

Example response:

{
  "name": "test",
  "accessKeyId": "GK31c2f218a2e44f485b94239e",
  "secretAccessKey": "b892c0665f0ada8a4755dae98baa3b133590e11dae3bcc1f9d769d67f16c3835",
  "permissions": {
    "createBucket": false
  },
  "buckets": [
    {
      "id": "70dc3bed7fe83a75e46b66e7ddef7d56e65f3c02f9f80b6749fb97eccb5e1033",
      "globalAliases": [
        "test2"
      ],
      "localAliases": [],
      "permissions": {
        "read": true,
        "write": true,
        "owner": false
      }
    },
    {
      "id": "d7452a935e663fc1914f3a5515163a6d3724010ce8dfd9e4743ca8be5974f995",
      "globalAliases": [
        "test3"
      ],
      "localAliases": [],
      "permissions": {
        "read": true,
        "write": true,
        "owner": false
      }
    },
    {
      "id": "e6a14cd6a27f48684579ec6b381c078ab11697e6bc8513b72b2f5307e25fff9b",
      "globalAliases": [],
      "localAliases": [
        "test"
      ],
      "permissions": {
        "read": true,
        "write": true,
        "owner": true
      }
    },
    {
      "id": "96470e0df00ec28807138daf01915cfda2bee8eccc91dea9558c0b4855b5bf95",
      "globalAliases": [
        "alex"
      ],
      "localAliases": [],
      "permissions": {
        "read": true,
        "write": true,
        "owner": true
      }
    }
  ]
}

DeleteKey DELETE /v0/key?id=<acces key id>

Deletes an API access key.

UpdateKey POST /v0/key?id=<acces key id>

Updates information about the specified API access key.

Request body format:

{
    "name": "NameOfMyKey",
    "allow": {
        "createBucket": true,
    },
    "deny": {}
}

All fields (name, allow and deny) are optionnal. If they are present, the corresponding modifications are applied to the key, otherwise nothing is changed. The possible flags in allow and deny are: createBucket.

Bucket operations

ListBuckets GET /v0/bucket

Returns all storage buckets in the cluster.

Example response:

[
  {
    "id": "70dc3bed7fe83a75e46b66e7ddef7d56e65f3c02f9f80b6749fb97eccb5e1033",
    "globalAliases": [
      "test2"
    ],
    "localAliases": []
  },
  {
    "id": "96470e0df00ec28807138daf01915cfda2bee8eccc91dea9558c0b4855b5bf95",
    "globalAliases": [
      "alex"
    ],
    "localAliases": []
  },
  {
    "id": "d7452a935e663fc1914f3a5515163a6d3724010ce8dfd9e4743ca8be5974f995",
    "globalAliases": [
      "test3"
    ],
    "localAliases": []
  },
  {
    "id": "e6a14cd6a27f48684579ec6b381c078ab11697e6bc8513b72b2f5307e25fff9b",
    "globalAliases": [],
    "localAliases": [
      {
        "accessKeyId": "GK31c2f218a2e44f485b94239e",
        "alias": "test"
      }
    ]
  }
]

GetBucketInfo GET /v0/bucket?id=<bucket id>

GetBucketInfo GET /v0/bucket?globalAlias=<alias>

Returns information about the requested storage bucket.

If id is set, the bucket is looked up using its exact identifier. If globalAlias is set, the bucket is looked up using its global alias. (both are fast)

Example response:

{
    "id": "afa8f0a22b40b1247ccd0affb869b0af5cff980924a20e4b5e0720a44deb8d39",
        "globalAliases": [],
        "websiteAccess": false,
        "websiteConfig": null,
        "keys": [
        {
            "accessKeyId": "GK31c2f218a2e44f485b94239e",
            "name": "Imported key",
            "permissions": {
                "read": true,
                "write": true,
                "owner": true
            },
            "bucketLocalAliases": [
                "debug"
            ]
        }
        ],
        "objects": 14827,
        "bytes": 13189855625,
        "unfinshedUploads": 0,
        "quotas": {
            "maxSize": null,
            "maxObjects": null
        }
}

CreateBucket POST /v0/bucket

Creates a new storage bucket.

Request body format:

{
    "globalAlias": "NameOfMyBucket"
}

OR

{
    "localAlias": {
        "accessKeyId": "GK31c2f218a2e44f485b94239e",
        "alias": "NameOfMyBucket",
        "allow": {
            "read": true,
            "write": true,
            "owner": false
        }
    }
}

OR

{}

Creates a new bucket, either with a global alias, a local one, or no alias at all.

Technically, you can also specify both globalAlias and localAlias and that would create two aliases, but I don't see why you would want to do that.

DeleteBucket DELETE /v0/bucket?id=<bucket id>

Deletes a storage bucket. A bucket cannot be deleted if it is not empty.

Warning: this will delete all aliases associated with the bucket!

UpdateBucket PUT /v0/bucket?id=<bucket id>

Updates configuration of the given bucket.

Request body format:

{
    "websiteAccess": {
        "enabled": true,
        "indexDocument": "index.html",
        "errorDocument": "404.html"
    },
    "quotas": {
        "maxSize": 19029801,
        "maxObjects": null,
    }
}

All fields (websiteAccess and quotas) are optionnal. If they are present, the corresponding modifications are applied to the bucket, otherwise nothing is changed.

In websiteAccess: if enabled is true, indexDocument must be specified. The field errorDocument is optional, if no error document is set a generic error message is displayed when errors happen. Conversely, if enabled is false, neither indexDocument nor errorDocument must be specified.

In quotas: new values of maxSize and maxObjects must both be specified, or set to null to remove the quotas. An absent value will be considered the same as a null. It is not possible to change only one of the two quotas.

Operations on permissions for keys on buckets

BucketAllowKey POST /v0/bucket/allow

Allows a key to do read/write/owner operations on a bucket.

Request body format:

{
    "bucketId": "e6a14cd6a27f48684579ec6b381c078ab11697e6bc8513b72b2f5307e25fff9b",
    "accessKeyId": "GK31c2f218a2e44f485b94239e",
    "permissions": {
        "read": true,
        "write": true,
        "owner": true
    },
}

Flags in permissions which have the value true will be activated. Other flags will remain unchanged.

BucketDenyKey POST /v0/bucket/deny

Denies a key from doing read/write/owner operations on a bucket.

Request body format:

{
    "bucketId": "e6a14cd6a27f48684579ec6b381c078ab11697e6bc8513b72b2f5307e25fff9b",
    "accessKeyId": "GK31c2f218a2e44f485b94239e",
    "permissions": {
        "read": false,
        "write": false,
        "owner": true
    },
}

Flags in permissions which have the value true will be deactivated. Other flags will remain unchanged.

Operations on bucket aliases

GlobalAliasBucket PUT /v0/bucket/alias/global?id=<bucket id>&alias=<global alias>

Empty body. Creates a global alias for a bucket.

GlobalUnaliasBucket DELETE /v0/bucket/alias/global?id=<bucket id>&alias=<global alias>

Removes a global alias for a bucket.

LocalAliasBucket PUT /v0/bucket/alias/local?id=<bucket id>&accessKeyId=<access key ID>&alias=<local alias>

Empty body. Creates a local alias for a bucket in the namespace of a specific access key.

LocalUnaliasBucket DELETE /v0/bucket/alias/local?id=<bucket id>&accessKeyId<access key ID>&alias=<local alias>

Removes a local alias for a bucket in the namespace of a specific access key.