add init container to db pod

Author: gkech

internal/patroni/reconcile.go

@@ -6,6 +6,7 @@ package patroni
 
 import (
 	"context"
+	"github.com/percona/percona-postgresql-operator/percona/k8s"
 	"strings"
 
 	corev1 "k8s.io/api/core/v1"
@@ -134,6 +135,19 @@ func InstancePod(ctx context.Context,
 
 	instanceProbes(inCluster, container)
 
+	// K8SPG-708
+	if inCluster.CompareVersion("2.7.0") >= 0 {
+		outInstancePod.Spec.InitContainers = []corev1.Container{
+			k8s.InitContainer(
+				naming.ContainerDatabase,
+				inCluster.Spec.Image,
+				inCluster.Spec.ImagePullPolicy,
+				initialize.RestrictedSecurityContext(true),
+				container.Resources,
+			),
+		}
+	}
+
 	return nil
 }
 

internal/patroni/reconcile_test.go

@@ -182,6 +182,28 @@ containers:
   - mountPath: /etc/patroni
     name: patroni-config
     readOnly: true
+initContainers:
+- command:
+  - /usr/local/bin/init-entrypoint.sh
+  image: image
+  imagePullPolicy: Always
+  name: database-init
+  resources: {}
+  securityContext:
+    allowPrivilegeEscalation: false
+    capabilities:
+      drop:
+      - ALL
+    privileged: false
+    readOnlyRootFilesystem: true
+    runAsNonRoot: true
+    seccompProfile:
+      type: RuntimeDefault
+  terminationMessagePath: /dev/termination-log
+  terminationMessagePolicy: File
+  volumeMounts:
+  - mountPath: /opt/crunchy
+    name: crunchy-bin
 volumes:
 - name: patroni-config
   projected: