Checkmk Werk 7425: mk_postgres, postgres_instances: fix plugin output for older operating systems

ID: 7425 Title: mk_postgres, postgres_instances: fix plugin output for older operating systems Component: Checks & agents Level: 1 Class: Bug fix Version: 1.7.0i1 mk_postgres used the pgrep command to find the running PostgreSQL instances. Unfortunately, version 1.5.0p3 added a command line argument that is not supported on older operating systems like e.g. SLES 11, but only on newer ones like e.g. SLES 12. As a result Checkmk did not find any PostgreSQL instances on older operating systems. To resolve the issue, the fixed version of the mk_postgres plugin has to be deployed on the affected hosts.