🌱 test/e2e/in-memory: enable unit tests

scripts/ci-test.sh

@@ -31,6 +31,10 @@ echo -e "\n*** Testing Cluster API Provider Docker ***\n"
 # Docker provider
 make test-docker-infrastructure-junit
 
+echo -e "\n*** Testing Cluster API Provider In-Memory ***\n"
+# Docker provider
+make test-in-memory-infrastructure-junit
+
 echo -e "\n*** Testing Cluster API Runtime SDK test extension ***\n"
 # Test Extension
 make test-test-extension-junit

test/infrastructure/inmemory/internal/controllers/inmemorymachine_controller_test.go

@@ -314,8 +314,14 @@ func TestReconcileNormalEtcd(t *testing.T) {
 		manager := cmanager.New(scheme)
 
 		host := "127.0.0.1"
-		wcmux := server.NewWorkloadClustersMux(manager, host)
-		_, err := wcmux.InitWorkloadClusterListener(klog.KObj(cluster).String())
+		wcmux, err := server.NewWorkloadClustersMux(manager, host, server.CustomPorts{
+			// NOTE: make sure to use ports different than other tests, so we can run tests in parallel
+			MinPort:   server.DefaultMinPort + 1000,
+			MaxPort:   server.DefaultMinPort + 1099,
+			DebugPort: server.DefaultDebugPort,
+		})
+		g.Expect(err).ToNot(HaveOccurred())
+		_, err = wcmux.InitWorkloadClusterListener(klog.KObj(cluster).String())
 		g.Expect(err).ToNot(HaveOccurred())
 
 		r := InMemoryMachineReconciler{
@@ -436,8 +442,14 @@ func TestReconcileNormalApiServer(t *testing.T) {
 		manager := cmanager.New(scheme)
 
 		host := "127.0.0.1"
-		wcmux := server.NewWorkloadClustersMux(manager, host)
-		_, err := wcmux.InitWorkloadClusterListener(klog.KObj(cluster).String())
+		wcmux, err := server.NewWorkloadClustersMux(manager, host, server.CustomPorts{
+			// NOTE: make sure to use ports different than other tests, so we can run tests in parallel
+			MinPort:   server.DefaultMinPort + 1100,
+			MaxPort:   server.DefaultMinPort + 1299,
+			DebugPort: server.DefaultDebugPort,
+		})
+		g.Expect(err).ToNot(HaveOccurred())
+		_, err = wcmux.InitWorkloadClusterListener(klog.KObj(cluster).String())
 		g.Expect(err).ToNot(HaveOccurred())
 
 		r := InMemoryMachineReconciler{

test/infrastructure/inmemory/internal/server/mux.go

@@ -44,15 +44,52 @@ import (
 )
 
 const (
-	debugPort = 19000
+	// DefaultDebugPort default debug port of the workload clusters mux.
+	DefaultDebugPort = 19000
 
 	// This range allows for 4k clusters, which is 4 times the goal we have in mind for
 	// the first iteration of stress tests.
 
-	minPort = 20000
-	maxPort = 24000
+	// DefaultMinPort default min port of the workload clusters mux.
+	DefaultMinPort = 20000
+	// DefaultMaxPort default max port of the workload clusters mux.
+	DefaultMaxPort = 24000
 )
 
+// WorkloadClustersMuxOption define an option for the WorkloadClustersMux creation.
+type WorkloadClustersMuxOption interface {
+	Apply(*WorkloadClustersMuxOptions)
+}
+
+// WorkloadClustersMuxOptions are options for the workload clusters mux.
+type WorkloadClustersMuxOptions struct {
+	MinPort   int
+	MaxPort   int
+	DebugPort int
+}
+
+// ApplyOptions applies WorkloadClustersMuxOption to the current WorkloadClustersMuxOptions.
+func (o *WorkloadClustersMuxOptions) ApplyOptions(opts []WorkloadClustersMuxOption) *WorkloadClustersMuxOptions {
+	for _, opt := range opts {
+		opt.Apply(o)
+	}
+	return o
+}
+
+// CustomPorts allows to customize the ports used by the workload clusters mux.
+type CustomPorts struct {
+	MinPort   int
+	MaxPort   int
+	DebugPort int
+}
+
+// Apply applies this configuration to the given WorkloadClustersMuxOptions.
+func (c CustomPorts) Apply(options *WorkloadClustersMuxOptions) {
+	options.MinPort = c.MinPort
+	options.MaxPort = c.MaxPort
+	options.DebugPort = c.DebugPort
+}
+
 // WorkloadClustersMux implements a server that handles requests for multiple workload clusters.
 // Each workload clusters will get its own listener, serving on a dedicated port, eg.
 // wkl-cluster-1 >> :20000, wkl-cluster-2 >> :20001 etc.
@@ -77,12 +114,19 @@ type WorkloadClustersMux struct {
 }
 
 // NewWorkloadClustersMux returns a WorkloadClustersMux that handles requests for multiple workload clusters.
-func NewWorkloadClustersMux(manager cmanager.Manager, host string) *WorkloadClustersMux {
+func NewWorkloadClustersMux(manager cmanager.Manager, host string, opts ...WorkloadClustersMuxOption) (*WorkloadClustersMux, error) {
+	options := WorkloadClustersMuxOptions{
+		MinPort:   DefaultMinPort,
+		MaxPort:   DefaultMaxPort,
+		DebugPort: DefaultDebugPort,
+	}
+	options.ApplyOptions(opts)
+
 	m := &WorkloadClustersMux{
 		host:                      host,
-		minPort:                   minPort,
-		maxPort:                   maxPort,
-		portIndex:                 minPort,
+		minPort:                   options.MinPort,
+		maxPort:                   options.MaxPort,
+		portIndex:                 options.MinPort,
 		manager:                   manager,
 		workloadClusterListeners:  map[string]*WorkloadClusterListener{},
 		workloadClusterNameByHost: map[string]string{},
@@ -107,10 +151,13 @@ func NewWorkloadClustersMux(manager cmanager.Manager, host string) *WorkloadClus
 	m.debugServer = http.Server{
 		Handler: api.NewDebugHandler(manager, m.log, m),
 	}
-	l, _ := net.Listen("tcp", net.JoinHostPort(host, fmt.Sprintf("%d", debugPort)))
+	l, err := net.Listen("tcp", net.JoinHostPort(host, fmt.Sprintf("%d", options.DebugPort)))
+	if err != nil {
+		return nil, errors.Wrapf(err, "failed to create listener for workload cluster mux")
+	}
 	go func() { _ = m.debugServer.Serve(l) }()
 
-	return m
+	return m, nil
 }
 
 // mixedHandler returns an handler that can serve either API server calls or etcd calls.

test/infrastructure/inmemory/internal/server/mux_test.go

@@ -60,13 +60,20 @@ func init() {
 }
 
 func TestMux(t *testing.T) {
+	t.Parallel()
 	g := NewWithT(t)
 
 	manager := cmanager.New(scheme)
 
 	wcl := "workload-cluster"
 	host := "127.0.0.1" //nolint:goconst
-	wcmux := NewWorkloadClustersMux(manager, host)
+	wcmux, err := NewWorkloadClustersMux(manager, host, CustomPorts{
+		// NOTE: make sure to use ports different than other tests, so we can run tests in parallel
+		MinPort:   DefaultMinPort,
+		MaxPort:   DefaultMinPort + 99,
+		DebugPort: DefaultDebugPort,
+	})
+	g.Expect(err).ToNot(HaveOccurred())
 
 	listener, err := wcmux.InitWorkloadClusterListener(wcl)
 	g.Expect(err).ToNot(HaveOccurred())
@@ -115,9 +122,15 @@ func TestMux(t *testing.T) {
 }
 
 func TestAPI_corev1_CRUD(t *testing.T) {
+	t.Parallel()
 	g := NewWithT(t)
 
-	wcmux, c := setupWorkloadClusterListener(g)
+	wcmux, c := setupWorkloadClusterListener(g, CustomPorts{
+		// NOTE: make sure to use ports different than other tests, so we can run tests in parallel
+		MinPort:   DefaultMinPort + 100,
+		MaxPort:   DefaultMinPort + 199,
+		DebugPort: DefaultDebugPort + 1,
+	})
 
 	// create
 
@@ -171,9 +184,15 @@ func TestAPI_corev1_CRUD(t *testing.T) {
 }
 
 func TestAPI_rbacv1_CRUD(t *testing.T) {
+	t.Parallel()
 	g := NewWithT(t)
 
-	wcmux, c := setupWorkloadClusterListener(g)
+	wcmux, c := setupWorkloadClusterListener(g, CustomPorts{
+		// NOTE: make sure to use ports different than other tests, so we can run tests in parallel
+		MinPort:   DefaultMinPort + 200,
+		MaxPort:   DefaultMinPort + 299,
+		DebugPort: DefaultDebugPort + 2,
+	})
 
 	// create
 
@@ -214,12 +233,19 @@ func TestAPI_rbacv1_CRUD(t *testing.T) {
 }
 
 func TestAPI_PortForward(t *testing.T) {
+	t.Parallel()
 	g := NewWithT(t)
 	manager := cmanager.New(scheme)
 
 	// TODO: deduplicate this setup code with the test above
 	host := "127.0.0.1"
-	wcmux := NewWorkloadClustersMux(manager, host)
+	wcmux, err := NewWorkloadClustersMux(manager, host, CustomPorts{
+		// NOTE: make sure to use ports different than other tests, so we can run tests in parallel
+		MinPort:   DefaultMinPort + 300,
+		MaxPort:   DefaultMinPort + 399,
+		DebugPort: DefaultDebugPort + 3,
+	})
+	g.Expect(err).ToNot(HaveOccurred())
 
 	// InfraCluster controller >> when "creating the load balancer"
 	wcl1 := "workload-cluster1"
@@ -341,11 +367,12 @@ func TestAPI_PortForward(t *testing.T) {
 	g.Expect(err).ToNot(HaveOccurred())
 }
 
-func setupWorkloadClusterListener(g Gomega) (*WorkloadClustersMux, client.Client) {
+func setupWorkloadClusterListener(g Gomega, ports CustomPorts) (*WorkloadClustersMux, client.Client) {
 	manager := cmanager.New(scheme)
 
 	host := "127.0.0.1"
-	wcmux := NewWorkloadClustersMux(manager, host)
+	wcmux, err := NewWorkloadClustersMux(manager, host, ports)
+	g.Expect(err).ToNot(HaveOccurred())
 
 	// InfraCluster controller >> when "creating the load balancer"
 	wcl1 := "workload-cluster1"

test/infrastructure/inmemory/main.go

@@ -257,7 +257,11 @@ func setupReconcilers(ctx context.Context, mgr ctrl.Manager) {
 
 	// Start an http server
 	podIP := os.Getenv("POD_IP")
-	apiServerMux := server.NewWorkloadClustersMux(cloudMgr, podIP)
+	apiServerMux, err := server.NewWorkloadClustersMux(cloudMgr, podIP)
+	if err != nil {
+		setupLog.Error(err, "unable to create workload clusters mux")
+		os.Exit(1)
+	}
 
 	// Setup reconcilers
 	if err := (&controllers.InMemoryClusterReconciler{