MQTT

The MQTT driver supports reporters only. It is used to send MQTT message when items report.

Message Schema

An MQTT report uses this schema:

<mqtt schema>

<mqtt schema>.uuid: The item UUID. Each item enqueued into a Zuul pipeline is assigned a UUID which remains the same even as Zuul’s speculative execution algorithm re-orders pipeline contents.

<mqtt schema>.action: The reporter action name, e.g.: ‘start’, ‘success’, ‘failure’, ‘merge-failure’, …

<mqtt schema>.tenant: The tenant name.

<mqtt schema>.pipeline: The pipeline name.

<mqtt schema>.project: The project name.

<mqtt schema>.branch: The branch name.

<mqtt schema>.change_url: The change url.

<mqtt schema>.message: The report message.

<mqtt schema>.change: The change number.

<mqtt schema>.patchset: The patchset number.

<mqtt schema>.commit_id: The commit id number.

<mqtt schema>.owner: The owner username of the change.

<mqtt schema>.ref: The change reference.

<mqtt schema>.zuul_ref: The internal zuul change reference.

<mqtt schema>.trigger_time: The timestamp when the event was added to the scheduler.

<mqtt schema>.enqueue_time: The timestamp when the event was added to the pipeline.

<mqtt schema>.buildset

The buildset information.

uuid

The buildset global uuid.

<mqtt schema>.buildset.result

The buildset result

<mqtt schema>.buildset.builds

The list of builds.

<mqtt schema>.buildset.builds.job_name: The job name.

<mqtt schema>.buildset.builds.voting: The job voting status.

<mqtt schema>.buildset.builds.uuid: The build uuid (not present in start report).

<mqtt schema>.buildset.builds.execute_time: The build execute time.

<mqtt schema>.buildset.builds.start_time: The build start time (not present in start report).

<mqtt schema>.buildset.builds.end_time: The build end time (not present in start report).

<mqtt schema>.buildset.builds.log_url: The build log url (not present in start report).

<mqtt schema>.buildset.builds.web_url: The url to the build result page. Not present in start report.

<mqtt schema>.buildset.builds.result: The build results (not present in start report).

<mqtt schema>.buildset.builds.artifacts Type: list

The build artifacts (not present in start report).

This is a list of dictionaries corresponding to the returned artifacts.

<mqtt schema>.buildset.builds.artifacts.name: The name of the artifact.

<mqtt schema>.buildset.builds.artifacts.url: The url of the artifact.

<mqtt schema>.buildset.builds.artifacts.metadata Type: dict: The metadata of the artifact. This is a dictionary of arbitrary key values determined by the job.

Here is an example of a start message:

{
  'action': 'start',
  'tenant': 'openstack.org',
  'pipeline': 'check',
  'project': 'sf-jobs',
  'branch': 'master',
  'change_url': 'https://gerrit.example.com/r/3',
  'message': 'Starting check jobs.',
  'trigger_time': '1524801056.2545864',
  'enqueue_time': '1524801093.5689457',
  'change': '3',
  'patchset': '1',
  'commit_id': '2db20c7fb26adf9ac9936a9e750ced9b4854a964',
  'owner': 'username',
  'ref': 'refs/changes/03/3/1',
  'zuul_ref': 'Zf8b3d7cd34f54cb396b488226589db8f',
  'buildset': {
    'uuid': 'f8b3d7cd34f54cb396b488226589db8f',
    'builds': [{
      'job_name': 'linters',
      'voting': True
    }],
  },
}

Here is an example of a success message:

{
  'action': 'success',
  'tenant': 'openstack.org',
  'pipeline': 'check',
  'project': 'sf-jobs',
  'branch': 'master',
  'change_url': 'https://gerrit.example.com/r/3',
  'message': 'Build succeeded.',
  'trigger_time': '1524801056.2545864',
  'enqueue_time': '1524801093.5689457',
  'change': '3',
  'patchset': '1',
  'commit_id': '2db20c7fb26adf9ac9936a9e750ced9b4854a964',
  'owner': 'username',
  'ref': 'refs/changes/03/3/1',
  'zuul_ref': 'Zf8b3d7cd34f54cb396b488226589db8f',
  'buildset': {
    'uuid': 'f8b3d7cd34f54cb396b488226589db8f',
    'builds': [{
      'job_name': 'linters',
      'voting': True
      'uuid': '16e3e55aca984c6c9a50cc3c5b21bb83',
      'execute_time': 1524801120.75632954,
      'start_time': 1524801179.8557224,
      'end_time': 1524801208.928095,
      'log_url': 'https://logs.example.com/logs/3/3/1/check/linters/16e3e55/',
      'web_url': 'https://tenant.example.com/t/tenant-one/build/16e3e55aca984c6c9a50cc3c5b21bb83/',
      'result': 'SUCCESS',
      'dependencies': [],
      'artifacts': [],
    }],
  },
}

Connection Configuration

<mqtt connection>

<mqtt connection>.driver (required)

mqtt: The connection must set driver=mqtt for MQTT connections.

<mqtt connection>.server Default: localhost: MQTT server hostname or address to use.

<mqtt connection>.port Default: 1883: MQTT server port.

<mqtt connection>.keepalive Default: 60: Maximum period in seconds allowed between communications with the broker.

<mqtt connection>.user: Set a username for optional broker authentication.

<mqtt connection>.password: Set a password for optional broker authentication.

<mqtt connection>.ca_certs: A string path to the Certificate Authority certificate files to enable TLS connection.

<mqtt connection>.certfile: A strings pointing to the PEM encoded client certificate to enable client TLS based authentication. This option requires keyfile to be set too.

<mqtt connection>.keyfile: A strings pointing to the PEM encoded client private keys to enable client TLS based authentication. This option requires certfile to be set too.

<mqtt connection>.ciphers: A string specifying which encryption ciphers are allowable for this connection. More information in this openssl doc.

Reporter Configuration

A connection that uses the mqtt driver must be supplied to the reporter. Each pipeline must provide a topic name. For example:

- pipeline:
    name: check
    success:
      mqtt:
        topic: "{tenant}/zuul/{pipeline}/{project}/{branch}/{change}"
        qos: 2

pipeline.<reporter>.<mqtt>

To report via MQTT message, the dictionaries passed to any of the pipeline reporter support the following attributes:

pipeline.<reporter>.<mqtt>.topic: The MQTT topic to publish messages. The topic can be a format string that can use the following parameters: tenant, pipeline, project, branch, change, patchset and ref. MQTT topic can have hierarchy separated by /, more details in this doc

pipeline.<reporter>.<mqtt>.qos Default: 0: The quality of service level to use, it can be 0, 1 or 2. Read more in this guide