use config ref

src/main/resources/postgres/config.yaml

@@ -5,6 +5,7 @@ metadata:
   labels:
     app: postgres
 data:
+  postgres-db: keycloak
   postgresql.conf: |
     max_connections = 1000
     shared_buffers = 512MB

src/main/resources/postgres/deployment.yaml

@@ -20,13 +20,15 @@ spec:
             - name: POSTGRES_USER
               value: "psql-user"
             - name: POSTGRES_DB
-              value: "keycloak"
+              valueFrom:
+                configMapKeyRef:
+                  name: postgres-config
+                  key: postgres-db
             - name: POSTGRES_PASSWORD
               value: "psql-pw"
           ports:
             - containerPort: 5432
               name: postgresql
-          cmd:
           volumeMounts:
             - name: postgres-config-volume
               mountPath: /etc/postgresql/postgresql.conf

src/test/cljc/dda/k8s_keycloak/postgres_test.cljc

@@ -19,7 +19,9 @@
                :name "postgresql"
                :env
                [{:name "POSTGRES_USER", :value "psqluser"}
-                {:name "POSTGRES_DB", :value "keycloak"}
+                {:name "POSTGRES_DB", :valueFrom
+                  {:configMapKeyRef
+                   {:name "postgres-config", :key "postgres-db"}}}
                 {:name "POSTGRES_PASSWORD", :value "test1234"}]
                :ports [{:containerPort 5432, :name "postgresql"}]
                :cmd nil