예제 #1
0
// getServiceEnvVarMap makes a map[string]string of env vars for services a
// pod in namespace ns should see.
func (kl *Kubelet) getServiceEnvVarMap(ns string) (map[string]string, error) {
	var (
		serviceMap = make(map[string]*api.Service)
		m          = make(map[string]string)
	)

	// Get all service resources from the master (via a cache),
	// and populate them into service environment variables.
	if kl.serviceLister == nil {
		// Kubelets without masters (e.g. plain GCE ContainerVM) don't set env vars.
		return m, nil
	}
	services, err := kl.serviceLister.List(labels.Everything())
	if err != nil {
		return m, fmt.Errorf("failed to list services when setting up env vars.")
	}

	// project the services in namespace ns onto the master services
	for i := range services {
		service := services[i]
		// ignore services where ClusterIP is "None" or empty
		if !api.IsServiceIPSet(service) {
			continue
		}
		serviceName := service.Name

		switch service.Namespace {
		// for the case whether the master service namespace is the namespace the pod
		// is in, the pod should receive all the services in the namespace.
		//
		// ordering of the case clauses below enforces this
		case ns:
			serviceMap[serviceName] = service
		case kl.masterServiceNamespace:
			if masterServices.Has(serviceName) {
				if _, exists := serviceMap[serviceName]; !exists {
					serviceMap[serviceName] = service
				}
			}
		}
	}

	mappedServices := []*api.Service{}
	for key := range serviceMap {
		mappedServices = append(mappedServices, serviceMap[key])
	}

	for _, e := range envvars.FromServices(mappedServices) {
		m[e.Name] = e.Value
	}
	return m, nil
}
예제 #2
0
func TestFromServices(t *testing.T) {
	sl := []*v1.Service{
		{
			ObjectMeta: v1.ObjectMeta{Name: "foo-bar"},
			Spec: v1.ServiceSpec{
				Selector:  map[string]string{"bar": "baz"},
				ClusterIP: "1.2.3.4",
				Ports: []v1.ServicePort{
					{Port: 8080, Protocol: "TCP"},
				},
			},
		},
		{
			ObjectMeta: v1.ObjectMeta{Name: "abc-123"},
			Spec: v1.ServiceSpec{
				Selector:  map[string]string{"bar": "baz"},
				ClusterIP: "5.6.7.8",
				Ports: []v1.ServicePort{
					{Name: "u-d-p", Port: 8081, Protocol: "UDP"},
					{Name: "t-c-p", Port: 8081, Protocol: "TCP"},
				},
			},
		},
		{
			ObjectMeta: v1.ObjectMeta{Name: "q-u-u-x"},
			Spec: v1.ServiceSpec{
				Selector:  map[string]string{"bar": "baz"},
				ClusterIP: "9.8.7.6",
				Ports: []v1.ServicePort{
					{Port: 8082, Protocol: "TCP"},
					{Name: "8083", Port: 8083, Protocol: "TCP"},
				},
			},
		},
		{
			ObjectMeta: v1.ObjectMeta{Name: "svrc-clusterip-none"},
			Spec: v1.ServiceSpec{
				Selector:  map[string]string{"bar": "baz"},
				ClusterIP: "None",
				Ports: []v1.ServicePort{
					{Port: 8082, Protocol: "TCP"},
				},
			},
		},
		{
			ObjectMeta: v1.ObjectMeta{Name: "svrc-clusterip-empty"},
			Spec: v1.ServiceSpec{
				Selector:  map[string]string{"bar": "baz"},
				ClusterIP: "",
				Ports: []v1.ServicePort{
					{Port: 8082, Protocol: "TCP"},
				},
			},
		},
	}
	vars := envvars.FromServices(sl)
	expected := []v1.EnvVar{
		{Name: "FOO_BAR_SERVICE_HOST", Value: "1.2.3.4"},
		{Name: "FOO_BAR_SERVICE_PORT", Value: "8080"},
		{Name: "FOO_BAR_PORT", Value: "tcp://1.2.3.4:8080"},
		{Name: "FOO_BAR_PORT_8080_TCP", Value: "tcp://1.2.3.4:8080"},
		{Name: "FOO_BAR_PORT_8080_TCP_PROTO", Value: "tcp"},
		{Name: "FOO_BAR_PORT_8080_TCP_PORT", Value: "8080"},
		{Name: "FOO_BAR_PORT_8080_TCP_ADDR", Value: "1.2.3.4"},
		{Name: "ABC_123_SERVICE_HOST", Value: "5.6.7.8"},
		{Name: "ABC_123_SERVICE_PORT", Value: "8081"},
		{Name: "ABC_123_SERVICE_PORT_U_D_P", Value: "8081"},
		{Name: "ABC_123_SERVICE_PORT_T_C_P", Value: "8081"},
		{Name: "ABC_123_PORT", Value: "udp://5.6.7.8:8081"},
		{Name: "ABC_123_PORT_8081_UDP", Value: "udp://5.6.7.8:8081"},
		{Name: "ABC_123_PORT_8081_UDP_PROTO", Value: "udp"},
		{Name: "ABC_123_PORT_8081_UDP_PORT", Value: "8081"},
		{Name: "ABC_123_PORT_8081_UDP_ADDR", Value: "5.6.7.8"},
		{Name: "ABC_123_PORT_8081_TCP", Value: "tcp://5.6.7.8:8081"},
		{Name: "ABC_123_PORT_8081_TCP_PROTO", Value: "tcp"},
		{Name: "ABC_123_PORT_8081_TCP_PORT", Value: "8081"},
		{Name: "ABC_123_PORT_8081_TCP_ADDR", Value: "5.6.7.8"},
		{Name: "Q_U_U_X_SERVICE_HOST", Value: "9.8.7.6"},
		{Name: "Q_U_U_X_SERVICE_PORT", Value: "8082"},
		{Name: "Q_U_U_X_SERVICE_PORT_8083", Value: "8083"},
		{Name: "Q_U_U_X_PORT", Value: "tcp://9.8.7.6:8082"},
		{Name: "Q_U_U_X_PORT_8082_TCP", Value: "tcp://9.8.7.6:8082"},
		{Name: "Q_U_U_X_PORT_8082_TCP_PROTO", Value: "tcp"},
		{Name: "Q_U_U_X_PORT_8082_TCP_PORT", Value: "8082"},
		{Name: "Q_U_U_X_PORT_8082_TCP_ADDR", Value: "9.8.7.6"},
		{Name: "Q_U_U_X_PORT_8083_TCP", Value: "tcp://9.8.7.6:8083"},
		{Name: "Q_U_U_X_PORT_8083_TCP_PROTO", Value: "tcp"},
		{Name: "Q_U_U_X_PORT_8083_TCP_PORT", Value: "8083"},
		{Name: "Q_U_U_X_PORT_8083_TCP_ADDR", Value: "9.8.7.6"},
	}
	if len(vars) != len(expected) {
		t.Errorf("Expected %d env vars, got: %+v", len(expected), vars)
		return
	}
	for i := range expected {
		if !reflect.DeepEqual(vars[i], expected[i]) {
			t.Errorf("expected %#v, got %#v", vars[i], expected[i])
		}
	}
}