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RPC messaging configurations
OpenStack services use Advanced Message Queuing Protocol (AMQP), an open
standard for messaging middleware. This messaging middleware enables the
OpenStack services that run on multiple servers to talk to each other.
OpenStack Oslo RPC supports two implementations of AMQP: RabbitMQ and
ZeroMQ.
Configure messaging
Use these options to configure the RPC messaging driver.
Configure RabbitMQ
OpenStack Oslo RPC uses RabbitMQ by default. The
rpc_backend option is not required as long as
RabbitMQ is the default messaging system. However, if it is
included in the configuration, you must set it to
rabbit:
rpc_backend = rabbitYou can configure messaging communication for different installation
scenarios, tune retries for RabbitMQ, and define the size of the RPC
thread pool. To monitor notifications through RabbitMQ, you
must set the notification_driver option to
nova.openstack.common.notifier.rpc_notifier. The default
value for sending usage data is sixty seconds plus a random number of
seconds from zero to sixty.
Use the options described in the table below to configure the
RabbitMQ message system.
Configure ZeroMQ
Use these options to configure the ZeroMQ messaging
system for OpenStack Oslo RPC. ZeroMQ is not the default
messaging system, so you must enable it by setting the
rpc_backend option.