Regaining a Quorum in a Galera Cluster in OpenStack on Red Hat Enterprise Linux OpenStack Platform 5 to 9

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Galera maintains its own quorum separate from pacemaker. There may be instances where you lose the Galera quorum, such as when rebooting your entire cluster. You have to manually restart services to regain the quorum. This is also called bootstrapping Galera.

Note: in RHEL OSP 6 (and later) the galera resource agent automatically detects loss of quorum, and recovers by ...

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