blockstack/gaia-admin

Mirror of quay.io blockstack/gaia-admin

Gaia Admin Service

This is a small service you can co-locate with your Gaia hub that lets you remotely administer it with an API key. Using this service, you can:

• Add, change, and remove whitelisted writers
• Set and change your backend storage driver
• Set and change your Gaia hub's connection settings
• Restart your Gaia hub to make the changes take effect

Usage

Building and Running

You can build this service from this directory as follows:

$ npm run build

To run in place:

$ node lib/index.js [/path/to/config.json]

To install this service as the blockstack-gaia-admin program in your $PATH:

$ sudo npm install -g
$ which blockstack-gaia-admin
/usr/bin/blockstack-gaia-admin

Configuration

The admin service needs a separate config file from your Gaia hub. Importantly, it needs to know the following:

• where the Gaia hub config file is located
• what API key(s) will be used to authenticate administrative requests
• what command(s) to run to restart the Gaia hub on a config change

Here is a sample config file for a Gaia hub config located at /tmp/gaia-config.json, and with a single API key "hello". The reload command is set to kill all instances of the blockstack-gaia-hub program, and restart it with nohup. You should tailor this to your deployment.

bash
$ cat /tmp/gaia-admin.json
{
   "argsTransport": {
    "level": "debug",
    "handleExceptions": true,
    "timestamp": true,
    "stringify": true,
    "colorize": true,
    "json": true
  },
  "port": 8009,
  "apiKeys": ["hello"],
  "gaiaSettings": {
    "configPath": "/tmp/gaia-config.json"
  },
  "reloadSettings": {
    "command": "/bin/sh",
    "argv": ["-c", "pkill -9 blockstack-gaia-hub; nohup /usr/bin/blockstack-gaia-hub /tmp/gaia-config.json &"],
    "env": {},
    "setuid": 1000,
    "setgid": 1000
  }
}

In the following usage examples, we assume that the Gaia admin service runs on http://localhost:8009.

Restarting the Gaia Hub

POST /v1/admin/reload

The admin service will make changes to the Gaia hub's config file, but the changes will only take effect when the Gaia hub is reloaded. You can do this as follows:

bash
$ export API_KEY="hello"
$ curl -H "Authorization: bearer $API_KEY" -X POST http://localhost:8009/v1/admin/reload
{"result":"OK"}

When you POST to this endpoint, the admin service will run the command described in the reloadSettings section of the config file. In particular, it will attempt to spawn a subprocess from the given reloadSettings.command binary, and pass it the arguments given in reloadSettings.argv. Note that the subprocess will NOT be run in a shell.

You can control the reload command's environment with the following optional configuration settings:

• reloadSettings.env: This is a key/value list of any environment variables that need to be set for the reload command to run.
• reloadSettings.setuid: This is the UID under which the command will be run.
• reloadSettings.setgid: This is the GID under which the command will run.

Errors

If you do not supply a valid API key, this method fails with HTTP 403.

This endpoint can return a HTTP 500 if the reload command fails. If this happens, you will get back the command's exit code and possibly the signal that killed it.

Get/Set Gaia Hub Settings

GET /v1/admin/config

This endpoint is used to read and write a Gaia hub's non-driver-related settings. These include the port it listens on, and its proof-checking settings.

To read the Gaia hub settings, you would run the following:

bash
$ export API_KEY="hello"
$ curl -H "Authorization: bearer $API_KEY" http://localhost:8009/v1/admin/config
{"config":{"port":4000,"proofsConfig":{"proofsRequired":0}}}

POST /v1/admin/config

To set Gaia hub settings, you simply POST the changed JSON fields to this endpoint. If the settings were successfully applied, you will be informed to reload your Gaia hub:

bash
$ export API_KEY="hello"
$ curl -H "Authorization: bearer $API_KEY" -H 'Content-Type: application/json' -X POST --data-raw '{"port": 3001}' http://localhost:8009/v1/admin/config
{"message":"Config updated -- you should reload your Gaia hub now."}

Message Formats

This section is derived from the src/server.js file.

The data accepted on POST must match this schema:

const GAIA_CONFIG_SCHEMA = {
  type: "object",
  properties: {
    validHubUrls: {
      type: "array",
      items: { type: "string", pattern: "^http://.+|https://.+$" },
    },
    requireCorrectHubUrl: { type: "boolean" },
    serverName: { type: "string", pattern: ".+" },
    port: { type: "integer", minimum: 1024, maximum: 65534 },
    proofsConfig: { type: "integer", minimum: 0 },
    whitelist: {
      type: "array",
      items: {
        type: "string",
        pattern: "^[123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz]+$"
      }
    },
    driver: { type: "string", pattern: ".+" },
    readURL: { type: "string", pattern: "^http://.+$|https://.+$" },
    pageSize: { type: "integer", minimum: 1 },
    bucket: { type: "string", pattern: ".+" },
    cacheControl: { type: "string", pattern: ".+" },
    azCredentials: {
      accountName: { type: "string", pattern: ".+" },
      accountKey: { type: "string", pattern: ".+" },
    },
    diskSettings: {
      storageRootDirectory: { type: "string" }
    },
    gcCredentials: {
      email: { type: "string" },
      projectId: { type: "string" },
      keyFilename: { type: "string" },
      credentials: {
        type: "object",
        properties: {
          client_email: { type: "string" },
          private_key: { type: "string" }
        }
      },
    },
    awsCredentials: {
      assessKeyId: { type: "string" },
      secretAccessKey: { type: "string" },
      sessionToken: { type: "string" }
    }
  }
}

The same fields will be returned on GET, but will be contained in a config object.

Errors

If you do not supply a valid API key, both the GET and POST method fail with HTTP 403.

Only relevant Gaia hub config fields will be set. If you POST invalid settings values, you will get an HTTP 400 error.

Examples

Reading and Writing Driver Settings

This endpoint is used to read and write storage driver settings, including:

• The driver to use (driver)
• The Gaia's read URL endpoint (readURL)
• The number of items to return when listing files (pageSize)
• The driver-specific settings

You can set multiple drivers' settings with this endpoint.

To get the current driver settings, you would run:

bash
$ export API_KEY="hello"
$ curl -H "Authorization: bearer $API_KEY" http://localhost:8009/v1/admin/config
{"config":{"driver":"disk","readURL":"http://localhost:4001/","pageSize":20,"diskSettings":{"storageRootDirectory":"/tmp/gaia-disk"}}}

To update the driver settings, you would run:

bash
$ export API_KEY="hello"
$ export AWS_ACCESS_KEY="<hidden>"
$ export AWS_SECRET_KEY="<hidden>"
$ curl -H "Authorization: bearer $API_KEY" -H 'Content-Type: application/json' -X POST --data-raw "{\"driver\": \"aws\", \"awsCredentials\": {\"accessKeyId\": \"$AWS_ACCESS_KEY\", \"secretAccessKey\": \"$AWS_SECRET_KEY\"}}" http://localhost:8009/v1/admin/config
{"message":"Config updated -- you should reload your Gaia hub now."}

Reading and Writing the Whitelist

This endpoint lets you read and write the whitelist section of a Gaia hub, in order to control who can write to it and list its files.

To get the current whitelist, you would run the following:

bash
$ export API_KEY="hello"
$ curl -H "Authorization: bearer $API_KEY" http://localhost:8009/v1/admin/config
{"config":{"whitelist":["15hUKXg1URbQsmaEHKFV2vP9kCeCsT8gUu"]}}

To set the whitelist, you would run the following:

bash
$ export API_KEY="hello"
$ curl -H "Authorization: bearer $API_KEY" -H 'Content-Type: application/json' -X POST --data-raw '["1KDcaHsYJqD7pwHtpDn6sujCVQCY2e1ktw", "15hUKXg1URbQsmaEHKFV2vP9kCeCsT8gUu"]' http://localhost:8009/v1/admin/config
{"message":"Config updated -- you should reload your Gaia hub now."}

Note that you must set the entire whitelist.