RabbitMQ is an AMQP server that exchanges messages within a vCloud Director environment. You can install and configure up to three RabbitMQ servers on CentOS hosts. For high availability and scalability purposes, you can configure the RabbitMQ servers in a cluster.
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If you have RabbitMQ already installed, make sure that the host is configured to support SSL connections.
For test and development environments, you can have RabbitMQ run in a Docker container instead. For more information, see Deploy Cassandra and RabbitMQ as Containers for Test and Development Environments in the vCloud Availability for vCloud Director Installation and Configuration Guide.