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Mastering OpenStack - Second Edition by Chandan Dutta Chowdhury, Omar Khedher

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Implementing HA on OpenStack cloud controllers

Moving on setting up of highly available OpenStack cloud controllers requires a way of managing the services running in the former nodes. Another alternative for the high

availabilitygame is using Pacemaker and Corosync. As a native high availability and load balancing stack solution for the Linux platform, Pacemaker depends on Corosync to maintain cluster communication based on the messaging layer. Corosync supports multicast as the default network configuration communication method. For some environments that do not support multicast, Corosync can be configured for unicast. In multicast networks, all the cluster nodes are connected to the same physical network device; it will be necessary to ...

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