remove normal initcontainer in sidecarset's sidecar list (openkruise#…

…1719)

Signed-off-by: liheng.zms <liheng.zms@alibaba-inc.com>

pkg/control/sidecarcontrol/util.go

@@ -242,14 +242,7 @@ func UpdatePodSidecarSetHash(pod *corev1.Pod, sidecarSet *appsv1alpha1.SidecarSe
 		// compatible done
 	}
 
-	sidecarList := sets.NewString()
-	for _, sidecar := range sidecarSet.Spec.Containers {
-		sidecarList.Insert(sidecar.Name)
-	}
-	for _, sidecar := range sidecarSet.Spec.InitContainers {
-		sidecarList.Insert(sidecar.Name)
-	}
-
+	sidecarList := listSidecarNameInSidecarSet(sidecarSet)
 	sidecarSetHash[sidecarSet.Name] = SidecarSetUpgradeSpec{
 		UpdateTimestamp:              metav1.Now(),
 		SidecarSetHash:               GetSidecarSetRevision(sidecarSet),
@@ -575,3 +568,17 @@ func IsSidecarContainer(container corev1.Container) bool {
 	}
 	return false
 }
+
+// listSidecarNameInSidecarSet list always init containers and sidecar containers
+func listSidecarNameInSidecarSet(sidecarSet *appsv1alpha1.SidecarSet) sets.String {
+	sidecarList := sets.NewString()
+	for _, sidecar := range sidecarSet.Spec.InitContainers {
+		if IsSidecarContainer(sidecar.Container) {
+			sidecarList.Insert(sidecar.Name)
+		}
+	}
+	for _, sidecar := range sidecarSet.Spec.Containers {
+		sidecarList.Insert(sidecar.Name)
+	}
+	return sidecarList
+}

pkg/webhook/pod/mutating/sidecarset.go

@@ -373,7 +373,10 @@ func buildSidecars(isUpdated bool, pod *corev1.Pod, oldPod *corev1.Pod, matchedS
 		if !isUpdated {
 			for i := range sidecarSet.Spec.InitContainers {
 				initContainer := &sidecarSet.Spec.InitContainers[i]
-				sidecarList.Insert(initContainer.Name)
+				// only insert k8s native sidecar container for in-place update
+				if sidecarcontrol.IsSidecarContainer(initContainer.Container) {
+					sidecarList.Insert(initContainer.Name)
+				}
 				// volumeMounts that injected into sidecar container
 				// when volumeMounts SubPathExpr contains expansions, then need copy container EnvVars(injectEnvs)
 				injectedMounts, injectedEnvs := sidecarcontrol.GetInjectedVolumeMountsAndEnvs(control, initContainer, pod)