Checklist:

• Have you added an explanation of what your changes do and why you'd like them to be included?
• Have you updated or added documentation for the change, as applicable?
• Have you tested your changes on all related environments with successful results, as applicable?
  • Have you added automated tests?

Data directories created by PostgresCluster have checksums enabled, so existing tests exercise the logic that invokes initdb with the --data-checksums argument.

Type of Changes:

• New feature
• Bug fix

What is the current behavior (link to any open issues here)?

A data directory without checksums enabled fails during pg_upgrade.

What is the new behavior (if this is a feature change)?

• Breaking change (fix or feature that would cause existing functionality to change)

PGUpgrade can upgrade a data directory that does not have checksums enabled.

Other Information:

This can happen when a data directory is imported from an external system.

Issue: PGO-619