OCP4 - Excluding log sources does not work as described in documentation

Issue

• According to the official OCP4 documentation, when we set a retention policy for one source of logs (application, infrastructure or audit) the other sources will not be collected.

  Red Hat OpenShift Container Platform - Configuring the log store:

  IMPORTANT
  If you do not specify a retention policy for all three log sources, only logs from the sources with a retention policy are stored. For example, if you set a retention policy for the infrastructure and applicaiton logs, but do not set a retention policy for audit logs, the audit logs will not be retained and there will be no audit- index in Elasticsearch or Kibana.

• Nevertheless, even if the retention policy for applications is set, new indexes for infrastructure and audit logs are created:

  green open .kibana_1                     GbvdVof2RwmTj0MO4yXb-w 1 1         0 0    522b   261b
  green open app-000007                    vjk5lxE6R0OSHOSs3Vr0cQ 3 0  54799797 0  45.4gb 45.4gb
  green open .kibana_98632_cmr_1           dZmeF30ITMaFavHDeaCg6w 1 1         2 0 110.2kb 55.1kb
  green open infra-000008                  n_kjKZfWSQ6tuIhJV8r7Rw 3 0  70156262 0  45.2gb 45.2gb
  green open app-000009                    8ih90ip4R-GAsdSZbvYLKQ 3 0  57118849 0  47.6gb 47.6gb
  green open app-000010                    lTL4ongKTk-J32fZ9TrsKw 3 0  43049226 0  37.3gb 37.3gb
  green open app-000005                    Xzmv8sdQTtKRl6WhTjyQIA 3 0  57972369 0  48.3gb 48.3gb
  green open audit-000007                  hFB74r5BToWPbZTAx6dXjA 3 0         0 0    783b   783b
  green open infra-000004                  6OsQvxtvSDKnc1Jf3RLA0Q 3 0  73469619 0  47.2gb 47.2gb
  green open audit-000010                  uk-jOlbcSw-avtXmbtK-7g 3 0         0 0    783b   783b
  green open audit-000008                  01GxXUc-Qj2lzb8ufaU4Hg 3 0         0 0    783b   783b
  green open audit-000006                  T1f9hksPQByHiNXh6rYU2Q 3 0         0 0    783b   783b
  green open audit-000009                  KvJyLVGBTeWoNVZgKmhbsg 3 0         0 0    783b   783b
  green open infra-000006                  Kq0J8KUjSeOEZ_ZtWKluIg 3 0  72599831 0  46.7gb 46.7gb
  green open infra-000003                  sIVEPrhUR9SVfAkVmfg_6w 3 0  94107807 0  60.3gb 60.3gb
  green open .kibana_-2116095764_u005150_1 J0GPYn7vSHuzpGzbkG0FEQ 1 1         2 0 109.2kb 54.6kb
  

• That means the behavior is different from what is described in the documentation.