community.google.gcpubsub module – Create and Delete Topics/Subscriptions, Publish and pull messages on PubSub

Note

This module is part of the community.google collection (version 1.0.0).

You might already have this collection installed if you are using the ansible package. It is not included in ansible-core. To check whether it is installed, run ansible-galaxy collection list.

To install it, use: ansible-galaxy collection install community.google.

To use it in a playbook, specify: community.google.gcpubsub.

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

Comments

credentials_file

string

path to the JSON file associated with the service account email

project_id

string

your GCE project ID

publish

list / elements=string

List of dictionaries describing messages and attributes to be published. Dictionary is in message(str):attributes(dict) format. Only message is required.

service_account_email

string

service account email

state

string

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.

Choices:

  • absent

  • present ← (default)

subscription

dictionary

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.

ack_deadline

string

Subfield of subscription. Not required. Default deadline for subscriptions to ACK the message before it is resent. See examples.

name

string

Subfield of subscription. Required if subscription is specified. See examples.

pull

string

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

string

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.

topic

string / 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
  community.google.gcpubsub:
    topic: ansible-topic-example
    state: present

# Subscriptions associated with topic are not deleted.
- name: Delete Topic
  community.google.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)
  community.google.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)
  community.google.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
  community.google.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
  community.google.gcpubsub:
    topic: ansible-topic-example
    subscription:
      name: mysub
      push_endpoint: "None"

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

# only pull keyword is required.
- name: Pull messages from subscription
  community.google.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

Description

publish

list / elements=string

List of dictionaries describing messages and attributes to be published. Dictionary is in message(str):attributes(dict) format. Only message is required.

Returned: Only when specified

Sample: “publish: [\u0027message\u0027: \u0027my message\u0027, attributes: {\u0027key1\u0027: \u0027value1\u0027}]”

pulled_messages

list / elements=string

list of dictionaries containing message info. Fields are ack_id, attributes, data, message_id.

Returned: Only when subscription.pull is specified

Sample: [{“ack_id”: “XkASTCcYREl…”, “attributes”: {”…”: null, “key1”: “val1”}, “data”: “this is message 1”, “message_id”: “49107464153705”}, “..”]

state

string

The state of the topic or subscription. Value will be either ‘absent’ or ‘present’.

Returned: Always

Sample: “present”

subscription

string

Name of subscription.

Returned: When subscription fields are specified

Sample: “mysubscription”

topic

string

Name of topic.

Returned: Always

Sample: “mytopic”

Authors

  • Tom Melendez (@supertom)