Documentation

gcpubsub - Create and Delete Topics/Subscriptions, Publish and pull messages on PubSub

New in version 2.3.

Synopsis

Requirements

The below requirements are needed on the host that executes this module.

  • google-auth >= 0.5.0
  • google-cloud-pubsub >= 0.22.0

Parameters

Parameter Choices/Defaults Comments
ack_deadline
Subfield of subscription. Not required. Default deadline for subscriptions to ACK the message before it is resent. See examples.
name
Subfield of subscription. Required if subscription is specified. See examples.
publish
List of dictionaries describing messages and attributes to be published. Dictionary is in message(str):attributes(dict) format. Only message is required.
pull
Subfield of subscription. Not required. If specified, messages will be retrieved from topic via the provided subscription name. max_messages (int; default None; max number of messages to pull), message_ack (bool; default False; acknowledge the message) and return_immediately (bool; default True, don't wait for messages to appear). If the messages are acknowledged, changed is set to True, otherwise, changed is False.
push_endpoint
Subfield of subscription. Not required. If specified, message will be sent to an endpoint. See https://cloud.google.com/pubsub/docs/advanced#push_endpoints for more information.
state
    Choices:
  • absent
  • present ←
State of the topic or queue.
Applies to the most granular resource.
If subscription isspecified we remove it.
If only topic is specified, that is what is removed.
NOTE - A topic can be removed without first removing the subscription.
subscription
Dictionary containing a subscripton name associated with a topic (required), along with optional ack_deadline, push_endpoint and pull. For pulling from a subscription, message_ack (bool), max_messages (int) and return_immediate are available as subfields. See subfields name, push_endpoint and ack_deadline for more information.
topic
required
GCP pubsub topic name.
Only the name, not the full path, is required.

Notes

Note

  • Subscription pull happens before publish. You cannot publish and pull in the same task.

Examples

# (Message will be pushed; there is no check to see if the message was pushed before
- name: Create a topic and publish a message to it
  gcpubsub:
    topic: ansible-topic-example
    state: present

# Subscriptions associated with topic are not deleted.
- name: Delete Topic
  gcpubsub:
    topic: ansible-topic-example
    state: absent

# Setting absent will keep the messages from being sent
- name: Publish multiple messages, with attributes (key:value available with the message)
  gcpubsub:
    topic: '{{ topic_name }}'
    state: present
    publish:
      - message: this is message 1
        attributes:
          mykey1: myvalue
          mykey2: myvalu2
          mykey3: myvalue3
      - message: this is message 2
        attributes:
          server: prod
          sla: "99.9999"
          owner: fred

- name: Create Subscription (pull)
  gcpubsub:
    topic: ansible-topic-example
    subscription:
    - name: mysub
    state: present

# pull is default, ack_deadline is not required
- name: Create Subscription with ack_deadline and push endpoint
  gcpubsub:
    topic: ansible-topic-example
    subscription:
    - name: mysub
      ack_deadline: "60"
      push_endpoint: http://pushendpoint.example.com
    state: present

# Setting push_endpoint to "None" converts subscription to pull.
- name: Subscription change from push to pull
  gcpubsub:
    topic: ansible-topic-example
    subscription:
      name: mysub
      push_endpoint: "None"

### Topic will not be deleted
- name: Delete subscription
  gcpubsub:
    topic: ansible-topic-example
    subscription:
    - name: mysub
    state: absent

# only pull keyword is required.
- name: Pull messages from subscription
  gcpubsub:
    topic: ansible-topic-example
    subscription:
      name: ansible-topic-example-sub
      pull:
        message_ack: yes
        max_messages: "100"

Return Values

Common return values are documented here, the following are the fields unique to this module:

Key Returned Description
publish
list
Only when specified
List of dictionaries describing messages and attributes to be published. Dictionary is in message(str):attributes(dict) format. Only message is required.

Sample:
publish: ['message': 'my message', attributes: {'key1': 'value1'}]
pulled_messages
list
Only when subscription.pull is specified
list of dictionaries containing message info. Fields are ack_id, attributes, data, message_id.

Sample:
[{'attributes': {'...': None, 'key1': 'val1'}, 'ack_id': 'XkASTCcYREl...', 'data': 'this is message 1', 'message_id': '49107464153705'}, '..']
state
str
Always
The state of the topic or subscription. Value will be either 'absent' or 'present'.

Sample:
present
subscription
str
When subscription fields are specified
Name of subscription.

Sample:
mysubscription
topic
str
Always
Name of topic.

Sample:
mytopic


Status

This module is flagged as preview which means that it is not guaranteed to have a backwards compatible interface.

Maintenance

This module is flagged as community which means that it is maintained by the Ansible Community. See Module Maintenance & Support for more info.

For a list of other modules that are also maintained by the Ansible Community, see here.

Author

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