// getServiceEnvironmentVariables populates a list of environment variables that are used
// in the container environment to get access to services.
func (b *BasicBoundPodFactory) getServiceEnvironmentVariables(ctx api.Context, registry service.Registry, machine string) ([]api.EnvVar, error) {
var result []api.EnvVar
servicesInNs, err := registry.ListServices(ctx)
if err != nil {
return result, err
}
masterServices, err := registry.ListServices(api.WithNamespace(api.NewContext(), b.MasterServiceNamespace))
if err != nil {
return result, err
}
projection := map[string]api.Service{}
services := []api.Service{}
for _, service := range masterServices.Items {
if masterServiceNames.Has(service.Name) {
projection[service.Name] = service
}
}
for _, service := range servicesInNs.Items {
projection[service.Name] = service
}
for _, service := range projection {
services = append(services, service)
}
return envvars.FromServices(&api.ServiceList{Items: services}), nil
}
// getServiceEnvironmentVariables populates a list of environment variables that are use
// in the container environment to get access to services.
func getServiceEnvironmentVariables(ctx api.Context, registry service.Registry, machine string) ([]api.EnvVar, error) {
var result []api.EnvVar
services, err := registry.ListServices(ctx)
if err != nil {
return result, err
}
return envvars.FromServices(services), nil
}
// 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 enviroment 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()
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 _, service := range services.Items {
serviceName := service.Name
switch service.Namespace {
// for the case whether the master service namespace is the namespace the pod
// is in, pod should receive all the pods in the namespace.
//
// ordering of the case clauses below enforces this
case ns:
serviceMap[serviceName] = service
case kl.masterServiceNamespace:
if masterServices.Has(serviceName) {
_, exists := serviceMap[serviceName]
if !exists {
serviceMap[serviceName] = service
}
}
}
}
services.Items = []api.Service{}
for _, service := range serviceMap {
services.Items = append(services.Items, service)
}
for _, e := range envvars.FromServices(&services) {
m[e.Name] = e.Value
}
return m, nil
}
func TestFromServices(t *testing.T) {
sl := api.ServiceList{
Items: []api.Service{
{
ObjectMeta: api.ObjectMeta{Name: "foo-bar"},
Spec: api.ServiceSpec{
Port: 8080,
Selector: map[string]string{"bar": "baz"},
Protocol: "TCP",
PortalIP: "1.2.3.4",
},
},
{
ObjectMeta: api.ObjectMeta{Name: "abc-123"},
Spec: api.ServiceSpec{
Port: 8081,
Selector: map[string]string{"bar": "baz"},
Protocol: "UDP",
PortalIP: "5.6.7.8",
},
},
{
ObjectMeta: api.ObjectMeta{Name: "q-u-u-x"},
Spec: api.ServiceSpec{
Port: 8082,
Selector: map[string]string{"bar": "baz"},
Protocol: "TCP",
PortalIP: "9.8.7.6",
},
},
},
}
vars := envvars.FromServices(&sl)
expected := []api.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_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: "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_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"},
}
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])
}
}
}