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...
Do, or do not; there is no try. If the system outage is serious enough, we do not know the full extent of the damage to system files. If our database was not initialized with file checksums, it might be weeks before the corruptions make themselves known. If a crashed server takes over as a primary before that happens, these corruptions could eventually be replicated to other systems.
It's safer to simply start from scratch. Therefore, our first step is to erase the /db/pgdata directory itself. With no old files to lead Patroni astray, it will rebuild the data by invoking pg_basebackup and configuring the instance that we specified in /etc/patroni/stampede.yml. We can even watch this happen by following the logs.
This is what ...
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