Messaging server

OpenStack uses a message broker to coordinate operations and status information among services. The message broker service typically runs on the controller node. OpenStack supports several message brokers including RabbitMQ, Qpid, and ZeroMQ. However, most distributions that package OpenStack support a particular message broker. This guide covers the message broker supported by each distribution. If you prefer to implement a different message broker, consult the documentation associated with it.

To install the message broker service

Ubuntu and Debian use RabbitMQ.
```
# apt-get install rabbitmq-server
```

To configure the message broker service

The message broker creates a default account that uses guest for the username and password. To simplify installation of your test environment, we recommend that you use this account, but change the password for it.

Run the following command:

Replace RABBIT_PASS with a suitable password.

# rabbitmqctl change_password guest RABBIT_PASS

You must configure the rabbit_password key in the configuration file for each OpenStack service that uses the message broker.

Note

	Note
For production environments, you should create a unique account with suitable password. For more information on securing the message broker, see the documentation. If you decide to create a unique account with suitable password for your test environment, you must configure the `rabbit_userid` and `rabbit_password` keys in the configuration file of each OpenStack service that uses the message broker.

For production environments, you should create a unique account with suitable password. For more information on securing the message broker, see the documentation.

If you decide to create a unique account with suitable password for your test environment, you must configure the rabbit_userid and rabbit_password keys in the configuration file of each OpenStack service that uses the message broker.

Congratulations, now you are ready to install OpenStack services!

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