✨ Enable the builtin postgres configuration

[yanmxa]

Summary

You need to restart the Postgres instance for the configuration to take effect!

Fixed: https://issues.redhat.com/browse/ACM-16887

Resolved: #1320, which provides the details for addressing the aforementioned Jira issue.

Tests

• Unit/function tests have been added and incorporated into make unit-tests.
• Integration tests have been added and incorporated into make integration-test.
• E2E tests have been added and incorporated into make e2e-test-all.
• List other manual tests you have done.

• Check the configuration before

❯ kubectl exec -it multicluster-global-hub-postgresql-0 -n multicluster-global-hub -- psql -U postgres -d hoh;

Defaulted container "multicluster-global-hub-postgresql" out of: multicluster-global-hub-postgresql, prometheus-postgres-exporter
psql (16.4)
Type "help" for help.

hoh=# SHOW wal_level;
 wal_level
-----------
 replica
(1 row)

hoh=# SHOW max_wal_size;
 max_wal_size
--------------
 1GB
(1 row)

hoh=# exit

• Change the configuration

❯ oc get cm multicluster-global-hub-custom-postgresql-config -oyaml
apiVersion: v1
data:
  postgresql.conf: |
    wal_level = logical
    max_wal_size = 2GB
kind: ConfigMap
metadata:
  annotations:
    kubectl.kubernetes.io/last-applied-configuration: |
      {"apiVersion":"v1","data":{"postgresql.conf":"wal_level = logical\nmax_wal_size = 2GB\n"},"kind":"ConfigMap","metadata":{"annotations":{},"name":"multicluster-global-hub-custom-postgresql-config","namespace":"multicluster-global-hub"}}
  creationTimestamp: "2025-01-13T08:40:51Z"
  name: multicluster-global-hub-custom-postgresql-config
  namespace: multicluster-global-hub
  resourceVersion: "41591561"
  uid: 2b292e02-bab9-479f-a8b9-128e70a8a119
❯ oc get cm multicluster-global-hub-postgresql-config -oyaml
apiVersion: v1
data:
  postgresql.conf: |
    ssl = on
    ssl_cert_file = '/opt/app-root/src/certs/tls.crt' # server certificate
    ssl_key_file =  '/opt/app-root/src/certs/tls.key' # server private key
    ssl_min_protocol_version = TLSv1.3
    shared_preload_libraries = 'pg_stat_statements'
    pg_stat_statements.max = 10000
    pg_stat_statements.track = all
    wal_level = logical
    max_wal_size = 2GB
kind: ConfigMap
metadata:
  creationTimestamp: "2025-01-08T11:04:23Z"
  labels:
    global-hub.open-cluster-management.io/managed-by: global-hub-operator
  name: multicluster-global-hub-postgresql-config
  namespace: multicluster-global-hub
  ownerReferences:
  - apiVersion: operator.open-cluster-management.io/v1alpha4
    blockOwnerDeletion: true
    controller: true
    kind: MulticlusterGlobalHub
    name: multiclusterglobalhub
    uid: 1522175f-8e05-46cd-b8b5-17c65a72e20b
  resourceVersion: "41603005"
  uid: c496c5aa-37e5-4d82-8a6c-45a570ecbfdb

• Restart the instance and verify the configuration has been applied successfully

❯ oc get pods
NAME                                                READY   STATUS    RESTARTS      AGE
kafka-entity-operator-c5d866b4b-s9p2r               2/2     Running   0             4d21h
kafka-kraft-0                                       1/1     Running   0             4d22h
multicluster-global-hub-grafana-79bd77df4f-t92mh    2/2     Running   0             4d22h
multicluster-global-hub-manager-65945b9d89-74fln    1/1     Running   0             3m15s
multicluster-global-hub-operator-6ccd7577fd-8ktrk   1/1     Running   0             3m24s
multicluster-global-hub-postgresql-0                2/2     Running   0             4d3h
strimzi-cluster-operator-v0.43.0-76f57fb5b7-ks9kk   1/1     Running   1 (12h ago)   4d22h
❯ oc delete pods multicluster-global-hub-postgresql-0
pod "multicluster-global-hub-postgresql-0" deleted
❯ oc get pods
NAME                                                READY   STATUS    RESTARTS      AGE
kafka-entity-operator-c5d866b4b-s9p2r               2/2     Running   0             4d21h
kafka-kraft-0                                       1/1     Running   0             4d22h
multicluster-global-hub-grafana-79bd77df4f-t92mh    2/2     Running   0             4d22h
multicluster-global-hub-manager-65945b9d89-74fln    1/1     Running   0             4m9s
multicluster-global-hub-operator-6ccd7577fd-8ktrk   1/1     Running   0             4m18s
multicluster-global-hub-postgresql-0                2/2     Running   0             13s
strimzi-cluster-operator-v0.43.0-76f57fb5b7-ks9kk   1/1     Running   1 (12h ago)   4d22h
❯ kubectl exec -it multicluster-global-hub-postgresql-0 -n multicluster-global-hub -- psql -U postgres -d hoh;

Defaulted container "multicluster-global-hub-postgresql" out of: multicluster-global-hub-postgresql, prometheus-postgres-exporter
psql (16.4)
Type "help" for help.

hoh=# SHOW wal_level;
 wal_level
-----------
 logical
(1 row)

hoh=# SHOW max_wal_size;
 max_wal_size
--------------
 2GB
(1 row)

hoh=# exit

[clyang82]

Need provide a document in https://github.com/stolostron/multicluster-global-hub/tree/main/doc

[sonarqubecloud]

Quality Gate failed

Failed conditions
68.0% Coverage on New Code (required ≥ 70%)

See analysis details on SonarQube Cloud

[openshift-ci]

@yanmxa: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/sonarcloud	32b634e	link	true	/test sonarcloud

Full PR test history. Your PR dashboard.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository. I understand the commands that are listed here.

[yanmxa]

Need provide a document in https://github.com/stolostron/multicluster-global-hub/tree/main/doc

Add the document in this PR: #1329

[clyang82]

LGTM

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

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