Starting the subscription

The last ingredient in our high-availability PostgreSQL major version upgrade is to actually invoke the subscription. This is the point of no return, so we must ensure that everything is ready, and that nothing interrupts the synchronization process until it is complete.

This recipe will explain what is happening during the subscription process, and how to help make sure it completes without issue.

Getting ready

We will need two fully operational PostgreSQL clusters, so please follow all recipes up to the Bootstrapping the target cluster recipe before proceeding.

How to do it...

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