fix: identical endpoint name conflicts

controllers/controller/devworkspacerouting/devworkspacerouting_controller.go

@@ -93,9 +93,10 @@ func (r *DevWorkspaceRoutingReconciler) Reconcile(ctx context.Context, req ctrl.
 		return reconcile.Result{}, r.markRoutingFailed(instance, "DevWorkspaceRouting requires field routingClass to be set")
 	}
 
-	solver, err := r.SolverGetter.GetSolver(r.Client, instance.Spec.RoutingClass)
+	solver, err := r.SolverGetter.GetSolver(r.Client, reqLogger, instance.Spec.RoutingClass)
 	if err != nil {
 		if errors.Is(err, solvers.RoutingNotSupported) {
+			reqLogger.Info("Routing class not supported by this controller, skipping reconciliation", "routingClass", instance.Spec.RoutingClass)
 			return reconcile.Result{}, nil
 		}
 		return reconcile.Result{}, r.markRoutingFailed(instance, fmt.Sprintf("Invalid routingClass for DevWorkspace: %s", err))
@@ -149,6 +150,12 @@ func (r *DevWorkspaceRoutingReconciler) Reconcile(ctx context.Context, req ctrl.
 			return reconcile.Result{}, r.markRoutingFailed(instance, fmt.Sprintf("Unable to provision networking for DevWorkspace: %s", invalid))
 		}
 
+		var conflict *solvers.ServiceConflictError
+		if errors.As(err, &conflict) {
+			reqLogger.Error(conflict, "Routing controller detected a service conflict", "serviceName", conflict.Reason)
+			return reconcile.Result{}, r.markRoutingFailed(instance, fmt.Sprintf("Unable to provision networking for DevWorkspace: %s", conflict))
+		}
+
 		// generic error, just fail the reconciliation
 		return reconcile.Result{}, err
 	}

controllers/controller/devworkspacerouting/solvers/basic_solver.go

@@ -20,6 +20,8 @@ import (
 	"github.com/devfile/devworkspace-operator/pkg/config"
 	"github.com/devfile/devworkspace-operator/pkg/constants"
 	"github.com/devfile/devworkspace-operator/pkg/infrastructure"
+	"github.com/go-logr/logr"
+	"sigs.k8s.io/controller-runtime/pkg/client"
 )
 
 var routeAnnotations = func(endpointName string, endpointAnnotations map[string]string) map[string]string {
@@ -47,10 +49,21 @@ var nginxIngressAnnotations = func(endpointName string, endpointAnnotations map[
 // According to the current cluster there is different behavior:
 // Kubernetes: use Ingresses without TLS
 // OpenShift: use Routes with TLS enabled
-type BasicSolver struct{}
+type BasicSolver struct {
+	client client.Client
+	logger logr.Logger
+}
 
 var _ RoutingSolver = (*BasicSolver)(nil)
 
+// NewBasicSolver creates a new BasicSolver with the provided dependencies
+func NewBasicSolver(client client.Client, logger logr.Logger) *BasicSolver {
+	return &BasicSolver{
+		client: client,
+		logger: logger,
+	}
+}
+
 func (s *BasicSolver) FinalizerRequired(*controllerv1alpha1.DevWorkspaceRouting) bool {
 	return false
 }
@@ -70,7 +83,11 @@ func (s *BasicSolver) GetSpecObjects(routing *controllerv1alpha1.DevWorkspaceRou
 
 	spec := routing.Spec
 	services := getServicesForEndpoints(spec.Endpoints, workspaceMeta)
-	services = append(services, GetDiscoverableServicesForEndpoints(spec.Endpoints, workspaceMeta)...)
+	discoverableServices, err := GetDiscoverableServicesForEndpoints(spec.Endpoints, workspaceMeta, s.client, s.logger)
+	if err != nil {
+		return RoutingObjects{}, err
+	}
+	services = append(services, discoverableServices...)
 	routingObjects.Services = services
 	if infrastructure.IsOpenShift() {
 		routingObjects.Routes = getRoutesForSpec(routingSuffix, spec.Endpoints, workspaceMeta)

controllers/controller/devworkspacerouting/solvers/cluster_solver.go

@@ -24,18 +24,31 @@ import (
 	corev1 "k8s.io/api/core/v1"
 
 	controllerv1alpha1 "github.com/devfile/devworkspace-operator/apis/controller/v1alpha1"
+	"github.com/go-logr/logr"
+	"sigs.k8s.io/controller-runtime/pkg/client"
 )
 
 const (
 	serviceServingCertAnnot = "service.beta.openshift.io/serving-cert-secret-name"
 )
 
 type ClusterSolver struct {
-	TLS bool
+	TLS    bool
+	client client.Client
+	logger logr.Logger
 }
 
 var _ RoutingSolver = (*ClusterSolver)(nil)
 
+// NewClusterSolver creates a new ClusterSolver with the provided dependencies
+func NewClusterSolver(client client.Client, logger logr.Logger, tls bool) *ClusterSolver {
+	return &ClusterSolver{
+		TLS:    tls,
+		client: client,
+		logger: logger,
+	}
+}
+
 func (s *ClusterSolver) FinalizerRequired(*controllerv1alpha1.DevWorkspaceRouting) bool {
 	return false
 }
@@ -47,6 +60,11 @@ func (s *ClusterSolver) Finalize(*controllerv1alpha1.DevWorkspaceRouting) error
 func (s *ClusterSolver) GetSpecObjects(routing *controllerv1alpha1.DevWorkspaceRouting, workspaceMeta DevWorkspaceMetadata) (RoutingObjects, error) {
 	spec := routing.Spec
 	services := getServicesForEndpoints(spec.Endpoints, workspaceMeta)
+	discoverableServices, err := GetDiscoverableServicesForEndpoints(spec.Endpoints, workspaceMeta, s.client, s.logger)
+	if err != nil {
+		return RoutingObjects{}, err
+	}
+	services = append(services, discoverableServices...)
 	podAdditions := &controllerv1alpha1.PodAdditions{}
 	if s.TLS {
 		readOnlyMode := int32(420)

controllers/controller/devworkspacerouting/solvers/common.go

@@ -16,9 +16,15 @@
 package solvers
 
 import (
+	"context"
+	"fmt"
+
 	controllerv1alpha1 "github.com/devfile/devworkspace-operator/apis/controller/v1alpha1"
 	"github.com/devfile/devworkspace-operator/pkg/common"
 	"github.com/devfile/devworkspace-operator/pkg/constants"
+	"github.com/go-logr/logr"
+	"k8s.io/apimachinery/pkg/api/errors"
+	"sigs.k8s.io/controller-runtime/pkg/client"
 
 	routeV1 "github.com/openshift/api/route/v1"
 	corev1 "k8s.io/api/core/v1"
@@ -36,7 +42,7 @@ type DevWorkspaceMetadata struct {
 
 // GetDiscoverableServicesForEndpoints converts the endpoint list into a set of services, each corresponding to a single discoverable
 // endpoint from the list. Endpoints with the NoneEndpointExposure are ignored.
-func GetDiscoverableServicesForEndpoints(endpoints map[string]controllerv1alpha1.EndpointList, meta DevWorkspaceMetadata) []corev1.Service {
+func GetDiscoverableServicesForEndpoints(endpoints map[string]controllerv1alpha1.EndpointList, meta DevWorkspaceMetadata, cl client.Client, log logr.Logger) ([]corev1.Service, error) {
 	var services []corev1.Service
 	for _, machineEndpoints := range endpoints {
 		for _, endpoint := range machineEndpoints {
@@ -45,18 +51,36 @@ func GetDiscoverableServicesForEndpoints(endpoints map[string]controllerv1alpha1
 			}
 
 			if endpoint.Attributes.GetBoolean(string(controllerv1alpha1.DiscoverableAttribute), nil) {
-				// Create service with name matching endpoint
-				// TODO: This could cause a reconcile conflict if multiple workspaces define the same discoverable endpoint
-				// Also endpoint names may not be valid as service names
+				serviceName := common.EndpointName(endpoint.Name)
+				log.Info("Checking for existing service for discoverable endpoint", "serviceName", serviceName)
+				existingService := &corev1.Service{}
+				err := cl.Get(context.TODO(), client.ObjectKey{Name: serviceName, Namespace: meta.Namespace}, existingService)
+				if err != nil {
+					if !errors.IsNotFound(err) {
+						log.Error(err, "Failed to get service from cluster", "serviceName", serviceName)
+						return nil, err
+					}
+					log.Info("No existing service found", "serviceName", serviceName)
+				} else {
+					log.Info("Found existing service", "serviceName", serviceName)
+					if existingService.Labels[constants.DevWorkspaceIDLabel] != meta.DevWorkspaceId {
+						log.Info("Service conflict detected", "serviceName", serviceName, "existingWorkspaceId", existingService.Labels[constants.DevWorkspaceIDLabel], "currentWorkspaceId", meta.DevWorkspaceId)
+						return nil, &ServiceConflictError{
+							Reason: fmt.Sprintf("discoverable endpoint %s conflicts with existing service", endpoint.Name),
+						}
+					}
+					log.Info("Existing service is owned by the same workspace", "serviceName", serviceName)
+				}
+
 				servicePort := corev1.ServicePort{
-					Name:       common.EndpointName(endpoint.Name),
+					Name:       serviceName,
 					Protocol:   corev1.ProtocolTCP,
 					Port:       int32(endpoint.TargetPort),
 					TargetPort: intstr.FromInt(endpoint.TargetPort),
 				}
 				services = append(services, corev1.Service{
 					ObjectMeta: metav1.ObjectMeta{
-						Name:      common.EndpointName(endpoint.Name),
+						Name:      serviceName,
 						Namespace: meta.Namespace,
 						Labels: map[string]string{
 							constants.DevWorkspaceIDLabel: meta.DevWorkspaceId,
@@ -74,7 +98,7 @@ func GetDiscoverableServicesForEndpoints(endpoints map[string]controllerv1alpha1
 			}
 		}
 	}
-	return services
+	return services, nil
 }
 
 // GetServiceForEndpoints returns a single service that exposes all endpoints of given exposure types, possibly also including the discoverable types.