February 2020
Intermediate to advanced
734 pages
38h 13m
English
Content preview from PostgreSQL 12 High Availability Cookbook - Third Edition
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If you believe we are being too wary, simply skip the last step in our recipe. However, it's important to remember that services are easy to start on Linux servers. This command, for instance, will start Pacemaker normally even while disabled:
sudo systemctl start pacemaker
If the server was rebooted as result of maintenance, the preceding commands will return the system to normal operation. Otherwise, a few cursory checks through server logs may determine that the cause of the system crash does not adversely affect PostgreSQL data. If so, once again, it is easy to start Corosync and Pacemaker and re-establish the dual-node cluster.
What we have done here is a very rudimentary form of STONITH, which means to Shoot The Other ...
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