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pg_auto_failover relies within the development of a watch service that manages one particular or quite a few HA formations. A formation can consist of a gaggle of two or more Postgres nodes.
If you're utilizing the output through the command pg_autoctl demonstrate options --json make sure you recognize that we modified the JSON format we use in the output.
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Here is what happens inside of a state of affairs with one standby node wherever your HA Resolution employs synchronous_commit to guard your information:
Login on the secondary node, which does not consist of any databases information and isn't initialized, and include it to your HA formation, much like:
What if you would like try out pg_auto_failover to implement a managed failover, which a few of you may perhaps call a switchover? You'll be able to examination our Postgres failover system with the application running and while not having to introduce a reduced-amount fault within your exam setting.
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Our pg_auto_failover documentation include things like developer commands for pg_autoctl with the following easter egg. It is possible to set up a tmux session that operates pgautoz a Main and two secondary Postgres nodes with only one pg_autoctl developer command:
Now that you have finished your initially Postgres failover with pg_auto_failover, it is possible to learn more about our open up source HA solution by examining the pg_auto_failover documentation and striving the different Postgres HA architectures which have been outlined there.