I am planning to upgrade from PG11 to PG13. During this integration i will have two versions of PstgreSQL für some time. When i add a new instance and want to integrate it into my old barman server i get:
pg_basebackup compatible: FAILED (PostgreSQL version: 13.5, pg_basebackup version: 11.13)
That is because on the barman server still the old version of postgres is installed. However, i don't find any configuration parameter to tell barman which version of PostgreSQL it should use. Is it possible to install two versions of PostgreSQL on the barmanserver and backup Instances with PG11 and PG13?
Do i just have to upgrade the barman server to PG13 and it detects the new PG Version and is backwards compatible to also back up the PG11 Instances?
I don't want to install PG13 on the barmanserver now, because i don't want to break my existing server before i know how Barman handles the new version and if it is capable of backing up the old PG11 databases after that.
thanks for your answer,