Saltstack external pillar for Hashicorp Vault with flexible minion targeting

• hvac python module (>= v0.2.17)

Your Vault server should be defined in the master config file with the following options:

    ext_pillar:
      - vault:
          url: https://vault:8200
          config: Path or salt:// URL to vault secret configuration
          token: (optional) Explicit token for token authentication
          app_id: (optional) Application ID for app-id authentication
          user_id: (optional) Explicit User ID for app-id authentication
          user_file: (optional) File to read for user-id value
          role_id: (optional) Role ID for AppRole authentication
          secret_id: (optional) Explicit Secret ID for AppRole authentication
          secret_file: (optional) File to read for secret-id value
          unset_if_missing: (optional) Leave pillar key unset if Vault secret not found

The url parameter is the full URL to the Vault API endpoint.

The config parameter is the path or salt:// URL to the secret map YML file to be parsed by the master.

The token parameter is an explicit token to use for authentication, and it overrides all other authentication methods.

The app_id parameter is an Application ID to use for app-id authentication.

The user_id parameter is an explicit User ID to pair with app_id for app-id authentication.

The user_file parameter is the path to a file on the master to read for a user-id value if user_id is not specified.

The role_id parameter is a Role ID to use for AppRole authentication.

The secret_id parameter is an explicit Role ID to pair with role_id for AppRole authentication.

The secret_file parameter is the path to a file on the master to read for a secret-id value if secret_id is not specified.

The unset_if_missing parameter determines behavior when the Vault secret is missing or otherwise inaccessible. If set to True, the pillar key is left unset. If set to False, the pillar key is set to None. Default is False

The config parameter, above, is a path to the YML file which will be used for mapping secrets to minions. The map uses syntax similar to the top file, and will be processed as a Jinja template:

    'filter':
      'variable': 'path'
      'variable': 'path?key'
    'filter':
      'variable': 'path?key'

Each filter is a compound matcher: https://docs.saltstack.com/en/latest/topics/targeting/compound.html

variable is the name of the variable which will be injected into the pillar data.

path is the path the desired secret on the Vault server.

key is optional. If specified, only this specific key will be returned for the secret at path. If unspecified, the entire secret json structure will be returned.

    'web*':
      'ssl_cert': '/secret/certs/domain?certificate'
      'ssl_key': '/secret/certs/domain?private_key'
    'db* and G@os.Ubuntu':
      'db_pass': '/secret/passwords/database'
    '*':
      'my_key': '/secret/certs/{{ grains.id }}?private_key'

• Derek Moore - Author