Change postgres image for Operator tests

Closes #22032

operator/src/main/resources/example-db-secret.yaml

@@ -2,7 +2,7 @@ apiVersion: v1
 kind: Secret
 metadata:
   name: keycloak-db-secret
-data:
-  username: cG9zdGdyZXM= # postgres
-  password: dGVzdHBhc3N3b3Jk # testpassword
+stringData:
+  username: "kc-user"
+  password: "testpassword"
 type: Opaque

operator/src/main/resources/example-postgres.yaml

@@ -16,16 +16,25 @@ spec:
     spec:
       containers:
         - name: postgresql-db
-          image: postgres:latest
+          # WARN: this image is not ARM64 native, consider using "postgres:latest" or "registry.redhat.io/rhel9/postgresql-15:latest" if you need that
+          # See also https://github.com/sclorg/postgresql-container/pull/527
+          # Using c8s instead of c9s as c9s requires additional arguments for emulation on ARM machines, while c8s works OOTB
+          image: quay.io/sclorg/postgresql-15-c8s:latest
           volumeMounts:
-            - mountPath: /data
+            - mountPath: /var/lib/pgsql/data
               name: cache-volume
           env:
-            - name: POSTGRES_PASSWORD
-              value: testpassword
-            - name: PGDATA
-              value: /data/pgdata
-            - name: POSTGRES_DB
+            - name: POSTGRESQL_USER
+              valueFrom:
+                secretKeyRef:
+                  key: username
+                  name: keycloak-db-secret
+            - name: POSTGRESQL_PASSWORD
+              valueFrom:
+                secretKeyRef:
+                  key: password
+                  name: keycloak-db-secret
+            - name: POSTGRESQL_DATABASE
               value: keycloak
       volumes:
         - name: cache-volume

operator/src/test/java/org/keycloak/operator/testsuite/integration/BaseOperatorTest.java

@@ -183,6 +183,8 @@ public class BaseOperatorTest implements QuarkusTestAfterEachCallback {
   }
 
   protected static void deployDB() {
+    deployDBSecret();
+
     // DB
     Log.info("Creating new PostgreSQL deployment");
     K8sUtils.set(k8sclient, BaseOperatorTest.class.getResourceAsStream("/example-postgres.yaml"));
@@ -191,8 +193,6 @@ public class BaseOperatorTest implements QuarkusTestAfterEachCallback {
     Log.info("Checking Postgres is running");
     Awaitility.await()
             .untilAsserted(() -> assertThat(k8sclient.apps().statefulSets().inNamespace(namespace).withName("postgresql-db").get().getStatus().getReadyReplicas()).isEqualTo(1));
-
-    deployDBSecret();
   }
 
   protected static void deployDBSecret() {