Clean up adoption configuration for galera CR

The Galera CR currently has attributes there were exposed for easing
the adoption process (transition of an existing galera cluster to
a k8s-managed galera cluster). However this has never been used
as it is unneeded with the current adoption implementation.

Remove those flags and simplify the operator accordingly.

Jira: OSPRH-8058

Author: dciabrin

api/bases/mariadb.openstack.org_galeras.yaml

@@ -44,13 +44,6 @@ spec:
           spec:
             description: GaleraSpec defines the desired state of Galera
             properties:
-              adoptionRedirect:
-                description: Adoption configuration
-                properties:
-                  host:
-                    description: MariaDB host to redirect to (IP or name)
-                    type: string
-                type: object
               containerImage:
                 description: Name of the galera container image to run (will be set
                   to environmental default if empty)

api/v1beta1/galera_types.go

@@ -38,12 +38,6 @@ const (
 	CrMaxLengthCorrection = 17
 )
 
-// AdoptionRedirectSpec defines redirection to a different DB instance during Adoption
-type AdoptionRedirectSpec struct {
-	// MariaDB host to redirect to (IP or name)
-	Host string `json:"host,omitempty"`
-}
-
 // GaleraSpec defines the desired state of Galera
 type GaleraSpec struct {
 	GaleraSpecCore `json:",inline"`
@@ -77,9 +71,6 @@ type GaleraSpecCore struct {
 	// The content gets added to /etc/my.cnf.d/galera_custom.cnf
 	CustomServiceConfig string `json:"customServiceConfig,omitempty"`
 	// +kubebuilder:validation:Optional
-	// Adoption configuration
-	AdoptionRedirect AdoptionRedirectSpec `json:"adoptionRedirect"`
-	// +kubebuilder:validation:Optional
 	// +operator-sdk:csv:customresourcedefinitions:type=spec
 	// TLS settings for MySQL service and internal Galera replication
 	TLS tls.SimpleService `json:"tls,omitempty"`

api/v1beta1/zz_generated.deepcopy.go

@@ -44,13 +44,6 @@ spec:
           spec:
             description: GaleraSpec defines the desired state of Galera
             properties:
-              adoptionRedirect:
-                description: Adoption configuration
-                properties:
-                  host:
-                    description: MariaDB host to redirect to (IP or name)
-                    type: string
-                type: object
               containerImage:
                 description: Name of the galera container image to run (will be set
                   to environmental default if empty)

config/crd/bases/mariadb.openstack.org_galeras.yaml

@@ -407,7 +407,7 @@ func (r *GaleraReconciler) Reconcile(ctx context.Context, req ctrl.Request) (res
 		condition.UnknownCondition(condition.InputReadyCondition, condition.InitReason, condition.InputReadyInitMessage),
 		// TLS cert secrets
 		condition.UnknownCondition(condition.TLSInputReadyCondition, condition.InitReason, condition.InputReadyInitMessage),
-		// endpoint for adoption redirect
+		// service (expose database to pods) and headless service (between galera pods)
 		condition.UnknownCondition(condition.ExposeServiceReadyCondition, condition.InitReason, condition.ExposeServiceReadyInitMessage),
 		// configmap generation
 		condition.UnknownCondition(condition.ServiceConfigReadyCondition, condition.InitReason, condition.ServiceConfigReadyInitMessage),
@@ -464,34 +464,6 @@ func (r *GaleraReconciler) Reconcile(ctx context.Context, req ctrl.Request) (res
 	// Create/Update all the resources associated to this galera instance
 	//
 
-	adoption := &instance.Spec.AdoptionRedirect
-
-	// Endpoints
-	endpoints := mariadb.EndpointsForAdoption(instance, adoption)
-	if endpoints != nil {
-		op, err := controllerutil.CreateOrPatch(ctx, r.Client, endpoints, func() error {
-			err := controllerutil.SetControllerReference(instance, endpoints, r.Scheme)
-			if err != nil {
-				return err
-			}
-			return nil
-		})
-		if err != nil {
-			instance.Status.Conditions.Set(condition.FalseCondition(
-				condition.ExposeServiceReadyCondition,
-				condition.ErrorReason,
-				condition.SeverityWarning,
-				condition.ExposeServiceReadyErrorMessage,
-				err.Error()))
-			return ctrl.Result{}, err
-		}
-		if op != controllerutil.OperationResultNone {
-			log.Info("", "Kind", instance.Kind, "Name", instance.Name, "database endpoints", endpoints.Name, "operation:", string(op))
-		}
-	}
-
-	instance.Status.Conditions.MarkTrue(condition.ExposeServiceReadyCondition, condition.ExposeServiceReadyMessage)
-
 	// the headless service provides DNS entries for pods
 	// the name of the resource must match the name of the app selector
 	pkghl := mariadb.HeadlessService(instance)
@@ -511,7 +483,7 @@ func (r *GaleraReconciler) Reconcile(ctx context.Context, req ctrl.Request) (res
 		log.Info("", "Kind", instance.Kind, "Name", instance.Name, "database headless service", headless.Name, "operation", string(op))
 	}
 
-	pkgsvc := mariadb.ServiceForAdoption(instance, "galera", adoption)
+	pkgsvc := mariadb.Service(instance)
 	service := &corev1.Service{ObjectMeta: pkgsvc.ObjectMeta}
 	op, err = controllerutil.CreateOrPatch(ctx, r.Client, service, func() error {
 		// Add finalizer to the svc to prevent deletion. If the svc gets deleted
@@ -542,6 +514,8 @@ func (r *GaleraReconciler) Reconcile(ctx context.Context, req ctrl.Request) (res
 		log.Info("", "Kind", instance.Kind, "Name", instance.Name, "database service", service.Name, "operation", string(op))
 	}
 
+	instance.Status.Conditions.MarkTrue(condition.ExposeServiceReadyCondition, condition.ExposeServiceReadyMessage)
+
 	// Map of all resources that may cause a rolling service restart
 	inputHashEnv := make(map[string]env.Setter)
 

controllers/galera_controller.go

@@ -1,29 +1,12 @@
 package mariadb
 
 import (
-	"net"
-
-	databasev1beta1 "github.com/openstack-k8s-operators/mariadb-operator/api/v1beta1"
 	corev1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 )
 
-// ServiceForAdoption - create a service based on the adoption configuration
-func ServiceForAdoption(db metav1.Object, dbType string, adoption *databasev1beta1.AdoptionRedirectSpec) *corev1.Service {
-	adoptionHost := adoption.Host
-	adoptionHostIsIP := adoptionHost == "" || net.ParseIP(adoptionHost) != nil
-
-	if adoptionHost != "" {
-		if adoptionHostIsIP {
-			return externalServiceFromIP(db)
-		}
-		return externalServiceFromName(db, adoption)
-	}
-	return internalService(db, dbType)
-}
-
-func internalService(db metav1.Object, dbType string) *corev1.Service {
-	selectors := LabelSelectors(db, dbType)
+func Service(db metav1.Object) *corev1.Service {
+	selectors := LabelSelectors(db, "galera")
 	// NOTE(dciabrin) we currently deploy the Galera cluster as A/P,
 	// by configuring the service's label selector to create
 	// a single endpoint matching a single pod's name.
@@ -60,36 +43,6 @@ func internalService(db metav1.Object, dbType string) *corev1.Service {
 	return svc
 }
 
-func externalServiceFromIP(db metav1.Object) *corev1.Service {
-	svc := &corev1.Service{
-		ObjectMeta: metav1.ObjectMeta{
-			Name:      db.GetName(),
-			Namespace: db.GetNamespace(),
-			Labels:    ServiceLabels(db),
-		},
-		Spec: corev1.ServiceSpec{
-			ClusterIP: "None",
-			Type:      corev1.ServiceTypeClusterIP,
-		},
-	}
-	return svc
-}
-
-func externalServiceFromName(db metav1.Object, adoption *databasev1beta1.AdoptionRedirectSpec) *corev1.Service {
-	svc := &corev1.Service{
-		ObjectMeta: metav1.ObjectMeta{
-			Name:      db.GetName(),
-			Namespace: db.GetNamespace(),
-			Labels:    ServiceLabels(db),
-		},
-		Spec: corev1.ServiceSpec{
-			ExternalName: adoption.Host,
-			Type:         corev1.ServiceTypeExternalName,
-		},
-	}
-	return svc
-}
-
 // HeadlessService - service to give galera pods connectivity via DNS
 func HeadlessService(db metav1.Object) *corev1.Service {
 	name := ResourceName(db.GetName())