add podManagementPolicy

pkg/cluster/k8sres.go

@@ -860,9 +860,18 @@ func (c *Cluster) generateStatefulSet(spec *acidv1.PostgresSpec) (*v1beta1.State
 
 	// the operator has domain-specific logic on how to do rolling updates of PG clusters
 	// so we do not use default rolling updates implemented by stateful sets
-	// that leaves "OnDelete" update strategy as the only option
+	// that leaves the legacy "OnDelete" update strategy as the only option
 	updateStrategy := v1beta1.StatefulSetUpdateStrategy{Type: v1beta1.OnDeleteStatefulSetStrategyType}
 
+	var podManagementPolicy v1beta1.PodManagementPolicyType
+	if c.OpConfig.PodManagementPolicy == "ordered_ready" {
+		podManagementPolicy = v1beta1.OrderedReadyPodManagement
+	} else if c.OpConfig.PodManagementPolicy == "parallel" {
+		podManagementPolicy = v1beta1.ParallelPodManagement
+	} else {
+		return nil, fmt.Errorf("could not set the pod management policy to the unknown value: %v", c.OpConfig.PodManagementPolicy)
+	}
+
 	statefulSet := &v1beta1.StatefulSet{
 		ObjectMeta: metav1.ObjectMeta{
 			Name:        c.statefulSetName(),
@@ -877,6 +886,7 @@ func (c *Cluster) generateStatefulSet(spec *acidv1.PostgresSpec) (*v1beta1.State
 			Template:             *podTemplate,
 			VolumeClaimTemplates: []v1.PersistentVolumeClaim{*volumeClaimTemplate},
 			UpdateStrategy:       updateStrategy,
+			PodManagementPolicy:  podManagementPolicy,
 		},
 	}
 

pkg/util/config/config.go

@@ -109,6 +109,7 @@ type Config struct {
 	ClusterHistoryEntries    int               `name:"cluster_history_entries" default:"1000"`
 	TeamAPIRoleConfiguration map[string]string `name:"team_api_role_configuration" default:"log_statement:all"`
 	PodTerminateGracePeriod  time.Duration     `name:"pod_terminate_grace_period" default:"5m"`
+	PodManagementPolicy      string            `name:"pod_management_policy" default:"ordered_ready"`
 	ProtectedRoles           []string          `name:"protected_role_names" default:"admin"`
 	PostgresSuperuserTeams   []string          `name:"postgres_superuser_teams" default:""`
 	SetMemoryRequestToLimit  bool              `name:"set_memory_request_to_limit" defaults:"false"`