Install the messaging queue server. Typically this is RabbitMQQpid but QpidRabbitMQ and ZeroMQ (0MQ) are also available. $ sudo apt-get install rabbitmq-server $ sudo zypper install rabbitmq-server All steps in this procedure require the privileges of the root user. If you are not logged in as the root user then either escalate your privileges using the su command or prefix each command with sudo, depending on the configuration of your system. Install the Qpid message broker and supporting utilities that will be needed in subsequent procedures. # yum install qpid-cpp-server memcached openstack-utils Disable Qpid authentication by setting the value of the auth configuration key to no in the /etc/qpidd.conf file. # echo "auth=no" >> /etc/qpidd.conf Start the Qpid message broker. # service qpidd start Configure the Qpid message broker to start automatically in future. # chkconfig qpidd on Configure Nova to use the Qpid message broker for remote procedure calls by setting the value of the rpc_backend configuration key in /etc/nova/nova.conf. # openstack-config --set /etc/nova/nova.conf \ DEFAULT rpc_backend nova.rpc.impl_qpid Configure Nova to use the Qpid message broker by setting the value of the qpid_hostname configuration key in /etc/nova/nova.conf. # openstack-config --set /etc/nova/nova.conf \ DEFAULT qpid_hostname 127.0.0.1 Replace 127.0.0.1 with the IP address or host name of your message broker.