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

Synopsis

• Create and Delete Topics/Subscriptions, Publish and pull messages on PubSub. See https://cloud.google.com/pubsub/docs for an overview.

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

Status

• This module is not guaranteed to have a backwards compatible interface. [preview]

• This module is maintained by the Ansible Community. [community]

Authors

• Tom Melendez (@supertom) <tom@supertom.com>

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