February 2020
Intermediate to advanced
734 pages
38h 13m
English
Content preview from PostgreSQL 12 High Availability Cookbook - Third Edition
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How it works...
To start the process, we must first temporarily disable the automated repmgr daemon with repmgr service pause. This is extremely important, as repmgr is currently configured to detect an outage, trigger an election, and automatically promote a node. If we manually invoke commands that alter the cluster state, the daemon could also start issuing commands and we may end up with an inoperable cluster.
It's extremely important to always pause the service when using repmgr commands that reassign, modify, or disable the current primary node. If we fail to do this, repmgr may start trying to "fix" the cluster while we're still making manual changes. Consider this a standard part of any kind of maintenance of a cluster operating under ...
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