Major version upgrade config (#1386)

* reflect new major version upgrade options everywhere

* emit events during major version upgrade

pkg/apis/acid.zalan.do/v1/crds.go

@@ -965,6 +965,20 @@ var OperatorConfigCRDResourceValidation = apiextv1.CustomResourceValidation{
 							},
 						},
 					},
+					"major_version_upgrade": {
+						Type: "object",
+						Properties: map[string]apiextv1.JSONSchemaProps{
+							"major_version_upgrade_mode": {
+								Type: "string",
+							},
+							"minimal_major_version": {
+								Type: "string",
+							},
+							"target_major_version": {
+								Type: "string",
+							},
+						},
+					},
 					"kubernetes": {
 						Type: "object",
 						Properties: map[string]apiextv1.JSONSchemaProps{

pkg/apis/acid.zalan.do/v1/operator_configuration_type.go

@@ -41,6 +41,13 @@ type PostgresUsersConfiguration struct {
 	ReplicationUsername string `json:"replication_username,omitempty"`
 }
 
+// MajorVersionUpgradeConfiguration defines how to execute major version upgrades of Postgres.
+type MajorVersionUpgradeConfiguration struct {
+	MajorVersionUpgradeMode     string   `json:"major_version_upgrade_mode" default:"off"` // off - no actions, manual - manifest triggers action, full - manifest and minimal version violation trigger upgrade
+	MinimalMajorVersion         string   `json:"minimal_major_version" default:"9.5"`
+	TargetMajorVersion          string   `json:"target_major_version" default:"13"`
+}
+
 // KubernetesMetaConfiguration defines k8s conf required for all Postgres clusters and the operator itself
 type KubernetesMetaConfiguration struct {
 	PodServiceAccountName string `json:"pod_service_account_name,omitempty"`
@@ -219,6 +226,7 @@ type OperatorConfigurationData struct {
 	SidecarImages              map[string]string                  `json:"sidecar_docker_images,omitempty"` // deprecated in favour of SidecarContainers
 	SidecarContainers          []v1.Container                     `json:"sidecars,omitempty"`
 	PostgresUsersConfiguration PostgresUsersConfiguration         `json:"users"`
+	MajorVersionUpgrade        MajorVersionUpgradeConfiguration   `json:"major_version_upgrade"`
 	Kubernetes                 KubernetesMetaConfiguration        `json:"kubernetes"`
 	PostgresPodResources       PostgresPodResourcesDefaults       `json:"postgres_pod_resources"`
 	Timeouts                   OperatorTimeouts                   `json:"timeouts"`

pkg/apis/acid.zalan.do/v1/zz_generated.deepcopy.go

@@ -309,6 +309,22 @@ func (in *MaintenanceWindow) DeepCopy() *MaintenanceWindow {
 	return out
 }
 
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *MajorVersionUpgradeConfiguration) DeepCopyInto(out *MajorVersionUpgradeConfiguration) {
+	*out = *in
+	return
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new MajorVersionUpgradeConfiguration.
+func (in *MajorVersionUpgradeConfiguration) DeepCopy() *MajorVersionUpgradeConfiguration {
+	if in == nil {
+		return nil
+	}
+	out := new(MajorVersionUpgradeConfiguration)
+	in.DeepCopyInto(out)
+	return out
+}
+
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *OperatorConfiguration) DeepCopyInto(out *OperatorConfiguration) {
 	*out = *in
@@ -364,6 +380,7 @@ func (in *OperatorConfigurationData) DeepCopyInto(out *OperatorConfigurationData
 		}
 	}
 	out.PostgresUsersConfiguration = in.PostgresUsersConfiguration
+	out.MajorVersionUpgrade = in.MajorVersionUpgrade
 	in.Kubernetes.DeepCopyInto(&out.Kubernetes)
 	out.PostgresPodResources = in.PostgresPodResources
 	out.Timeouts = in.Timeouts