rabbitmq – Retrieve messages from an AMQP/AMQPS RabbitMQ queue¶
New in version 2.8.
Synopsis¶
- This lookup uses a basic get to retrieve all, or a limited number
count
, messages from a RabbitMQ queue.
Requirements¶
The below requirements are needed on the local master node that executes this lookup.
- The python pika package https://pypi.org/project/pika/.
Parameters¶
Parameter | Choices/Defaults | Configuration | Comments |
---|---|---|---|
count
-
|
How many messages to collect from the queue.
If not set, defaults to retrieving all the messages from the queue.
|
||
queue
-
/ required
|
The queue to get messages from.
|
||
url
-
/ required
|
An URI connection string to connect to the AMQP/AMQPS RabbitMQ server.
For more information refer to the URI spec https://www.rabbitmq.com/uri-spec.html.
|
Notes¶
Note
- This lookup implements BlockingChannel.basic_get to get messages from a RabbitMQ server.
- After retrieving a message from the server, receipt of the message is acknowledged and the message on the server is deleted.
- Pika is a pure-Python implementation of the AMQP 0-9-1 protocol that tries to stay fairly independent of the underlying network support library.
- More information about pika can be found at https://pika.readthedocs.io/en/stable/.
- This plugin is tested against RabbitMQ. Other AMQP 0.9.1 protocol based servers may work but not tested/guaranteed.
- Assigning the return messages to a variable under
vars
may result in unexpected results as the lookup is evaluated every time the variable is referenced. - Currently this plugin only handles text based messages from a queue. Unexpected results may occur when retrieving binary data.
Examples¶
- name: Get all messages off a queue
debug:
msg: "{{ lookup('rabbitmq', url='amqp://guest:[email protected]:5672/%2F', queue='hello') }}"
# If you are intending on using the returned messages as a variable in more than
# one task (eg. debug, template), it is recommended to set_fact.
- name: Get 2 messages off a queue and set a fact for re-use
set_fact:
messages: "{{ lookup('rabbitmq', url='amqp://guest:[email protected]:5672/%2F', queue='hello', count=2) }}"
- name: Dump out contents of the messages
debug:
var: messages
Return Values¶
Common return values are documented here, the following are the fields unique to this lookup:
Status¶
- This lookup is not guaranteed to have a backwards compatible interface. [preview]
- This lookup is maintained by the Ansible Community. [community]
Authors¶
- John Imison <@Im0>
Hint
If you notice any issues in this documentation, you can edit this document to improve it.
Hint
Configuration entries for each entry type have a low to high priority order. For example, a variable that is lower in the list will override a variable that is higher up.