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Adds option to namespace k8s ingresses

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If the flag kubernetes.namespaces is set...
Then we only select ingresses from that/those namespace(s)

This allows multiple instances of traefik to
independently load balance for each namespace.
This could be for logical or security reasons.

Addresses #336
This commit is contained in:
Ed Robinson 2016-04-28 01:23:55 +01:00
parent d1b0bece47
commit 301a463aeb
No known key found for this signature in database
GPG Key ID: EC501FCA6421CCF0
6 changed files with 449 additions and 3 deletions
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1
cmd.go
View File

@ -172,6 +172,7 @@ func init() {
traefikCmd.PersistentFlags().BoolVar(&arguments.kubernetes, "kubernetes", false, "Enable Kubernetes backend")
traefikCmd.PersistentFlags().StringVar(&arguments.Kubernetes.Endpoint, "kubernetes.endpoint", "127.0.0.1:8080", "Kubernetes server endpoint")
traefikCmd.PersistentFlags().StringSliceVar(&arguments.Kubernetes.Namespaces, "kubernetes.namespaces", []string{}, "Kubernetes namespaces")
_ = viper.BindPFlag("configFile", traefikCmd.PersistentFlags().Lookup("configFile"))
_ = viper.BindPFlag("graceTimeOut", traefikCmd.PersistentFlags().Lookup("graceTimeOut"))

1
docs/toml.md
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@ -648,6 +648,7 @@ Træfɪk can be configured to use Kubernetes Ingress as a backend configuration:
# Optional
#
# endpoint = "http://localhost:8080"
# namespaces = ["default","production"]
```
You can find here an example [ingress](https://raw.githubusercontent.com/containous/traefik/master/examples/k8s.ingress.yaml) and [replication controller](https://raw.githubusercontent.com/containous/traefik/master/examples/k8s.rc.yaml).

2
provider/k8s/client.go
View File

@ -49,7 +49,7 @@ func NewClient(baseURL string, caCert []byte, token string) (Client, error) {
}, nil
}
// GetIngresses returns all services in the cluster
// GetIngresses returns all ingresses in the cluster
func (c *clientImpl) GetIngresses(predicate func(Ingress) bool) ([]Ingress, error) {
getURL := c.endpointURL + extentionsEndpoint + defaultIngress

11
provider/kubernetes.go
View File

@ -23,6 +23,7 @@ const (
type Kubernetes struct {
BaseProvider `mapstructure:",squash"`
Endpoint string
Namespaces []string
}
func (provider *Kubernetes) createClient() (k8s.Client, error) {
@ -123,7 +124,15 @@ func (provider *Kubernetes) Provide(configurationChan chan<- types.ConfigMessage
func (provider *Kubernetes) loadIngresses(k8sClient k8s.Client) (*types.Configuration, error) {
ingresses, err := k8sClient.GetIngresses(func(ingress k8s.Ingress) bool {
return true
if len(provider.Namespaces) == 0 {
return true
}
for _, n := range provider.Namespaces {
if ingress.ObjectMeta.Namespace == n {
return true
}
}
return false
})
if err != nil {
log.Errorf("Error retrieving ingresses: %+v", err)

436
provider/kubernetes_test.go
View File

@ -167,6 +167,434 @@ func TestLoadIngresses(t *testing.T) {
}
}
func TestLoadNamespacedIngresses(t *testing.T) {
ingresses := []k8s.Ingress{
{
ObjectMeta: k8s.ObjectMeta{
Namespace: "awesome",
},
Spec: k8s.IngressSpec{
Rules: []k8s.IngressRule{
{
Host: "foo",
IngressRuleValue: k8s.IngressRuleValue{
HTTP: &k8s.HTTPIngressRuleValue{
Paths: []k8s.HTTPIngressPath{
{
Path: "/bar",
Backend: k8s.IngressBackend{
ServiceName: "service1",
ServicePort: k8s.FromInt(801),
},
},
},
},
},
},
{
Host: "bar",
IngressRuleValue: k8s.IngressRuleValue{
HTTP: &k8s.HTTPIngressRuleValue{
Paths: []k8s.HTTPIngressPath{
{
Backend: k8s.IngressBackend{
ServiceName: "service3",
ServicePort: k8s.FromInt(443),
},
},
{
Backend: k8s.IngressBackend{
ServiceName: "service2",
ServicePort: k8s.FromInt(802),
},
},
},
},
},
},
},
},
},
{
ObjectMeta: k8s.ObjectMeta{
Namespace: "not-awesome",
},
Spec: k8s.IngressSpec{
Rules: []k8s.IngressRule{
{
Host: "baz",
IngressRuleValue: k8s.IngressRuleValue{
HTTP: &k8s.HTTPIngressRuleValue{
Paths: []k8s.HTTPIngressPath{
{
Path: "/baz",
Backend: k8s.IngressBackend{
ServiceName: "service1",
ServicePort: k8s.FromInt(801),
},
},
},
},
},
},
},
},
},
}
services := []k8s.Service{
{
ObjectMeta: k8s.ObjectMeta{
Name: "service1",
UID: "1",
},
Spec: k8s.ServiceSpec{
ClusterIP: "10.0.0.1",
Ports: []k8s.ServicePort{
{
Name: "http",
Port: 801,
},
},
},
},
{
ObjectMeta: k8s.ObjectMeta{
Name: "service2",
UID: "2",
},
Spec: k8s.ServiceSpec{
ClusterIP: "10.0.0.2",
Ports: []k8s.ServicePort{
{
Port: 802,
},
},
},
},
{
ObjectMeta: k8s.ObjectMeta{
Name: "service3",
UID: "3",
},
Spec: k8s.ServiceSpec{
ClusterIP: "10.0.0.3",
Ports: []k8s.ServicePort{
{
Name: "http",
Port: 443,
},
},
},
},
}
watchChan := make(chan interface{})
client := clientMock{
ingresses: ingresses,
services: services,
watchChan: watchChan,
}
provider := Kubernetes{
Namespaces: []string{"awesome"},
}
actual, err := provider.loadIngresses(client)
if err != nil {
t.Fatalf("error %+v", err)
}
expected := &types.Configuration{
Backends: map[string]*types.Backend{
"foo/bar": {
Servers: map[string]types.Server{
"1": {
URL: "http://10.0.0.1:801",
Weight: 1,
},
},
CircuitBreaker: nil,
LoadBalancer: nil,
},
"bar": {
Servers: map[string]types.Server{
"2": {
URL: "http://10.0.0.2:802",
Weight: 1,
},
"3": {
URL: "https://10.0.0.3:443",
Weight: 1,
},
},
CircuitBreaker: nil,
LoadBalancer: nil,
},
},
Frontends: map[string]*types.Frontend{
"foo/bar": {
Backend: "foo/bar",
Routes: map[string]types.Route{
"/bar": {
Rule: "PathPrefixStrip:/bar",
},
"foo": {
Rule: "Host:foo",
},
},
},
"bar": {
Backend: "bar",
Routes: map[string]types.Route{
"bar": {
Rule: "Host:bar",
},
},
},
},
}
actualJSON, _ := json.Marshal(actual)
expectedJSON, _ := json.Marshal(expected)
if !reflect.DeepEqual(actual, expected) {
t.Fatalf("expected %+v, got %+v", string(expectedJSON), string(actualJSON))
}
}
func TestLoadMultipleNamespacedIngresses(t *testing.T) {
ingresses := []k8s.Ingress{
{
ObjectMeta: k8s.ObjectMeta{
Namespace: "awesome",
},
Spec: k8s.IngressSpec{
Rules: []k8s.IngressRule{
{
Host: "foo",
IngressRuleValue: k8s.IngressRuleValue{
HTTP: &k8s.HTTPIngressRuleValue{
Paths: []k8s.HTTPIngressPath{
{
Path: "/bar",
Backend: k8s.IngressBackend{
ServiceName: "service1",
ServicePort: k8s.FromInt(801),
},
},
},
},
},
},
{
Host: "bar",
IngressRuleValue: k8s.IngressRuleValue{
HTTP: &k8s.HTTPIngressRuleValue{
Paths: []k8s.HTTPIngressPath{
{
Backend: k8s.IngressBackend{
ServiceName: "service3",
ServicePort: k8s.FromInt(443),
},
},
{
Backend: k8s.IngressBackend{
ServiceName: "service2",
ServicePort: k8s.FromInt(802),
},
},
},
},
},
},
},
},
},
{
ObjectMeta: k8s.ObjectMeta{
Namespace: "somewhat-awesome",
},
Spec: k8s.IngressSpec{
Rules: []k8s.IngressRule{
{
Host: "awesome",
IngressRuleValue: k8s.IngressRuleValue{
HTTP: &k8s.HTTPIngressRuleValue{
Paths: []k8s.HTTPIngressPath{
{
Path: "/quix",
Backend: k8s.IngressBackend{
ServiceName: "service1",
ServicePort: k8s.FromInt(801),
},
},
},
},
},
},
},
},
},
{
ObjectMeta: k8s.ObjectMeta{
Namespace: "not-awesome",
},
Spec: k8s.IngressSpec{
Rules: []k8s.IngressRule{
{
Host: "baz",
IngressRuleValue: k8s.IngressRuleValue{
HTTP: &k8s.HTTPIngressRuleValue{
Paths: []k8s.HTTPIngressPath{
{
Path: "/baz",
Backend: k8s.IngressBackend{
ServiceName: "service1",
ServicePort: k8s.FromInt(801),
},
},
},
},
},
},
},
},
},
}
services := []k8s.Service{
{
ObjectMeta: k8s.ObjectMeta{
Name: "service1",
UID: "1",
},
Spec: k8s.ServiceSpec{
ClusterIP: "10.0.0.1",
Ports: []k8s.ServicePort{
{
Name: "http",
Port: 801,
},
},
},
},
{
ObjectMeta: k8s.ObjectMeta{
Name: "service2",
UID: "2",
},
Spec: k8s.ServiceSpec{
ClusterIP: "10.0.0.2",
Ports: []k8s.ServicePort{
{
Port: 802,
},
},
},
},
{
ObjectMeta: k8s.ObjectMeta{
Name: "service3",
UID: "3",
},
Spec: k8s.ServiceSpec{
ClusterIP: "10.0.0.3",
Ports: []k8s.ServicePort{
{
Name: "http",
Port: 443,
},
},
},
},
}
watchChan := make(chan interface{})
client := clientMock{
ingresses: ingresses,
services: services,
watchChan: watchChan,
}
provider := Kubernetes{
Namespaces: []string{"awesome", "somewhat-awesome"},
}
actual, err := provider.loadIngresses(client)
if err != nil {
t.Fatalf("error %+v", err)
}
expected := &types.Configuration{
Backends: map[string]*types.Backend{
"foo/bar": {
Servers: map[string]types.Server{
"1": {
URL: "http://10.0.0.1:801",
Weight: 1,
},
},
CircuitBreaker: nil,
LoadBalancer: nil,
},
"bar": {
Servers: map[string]types.Server{
"2": {
URL: "http://10.0.0.2:802",
Weight: 1,
},
"3": {
URL: "https://10.0.0.3:443",
Weight: 1,
},
},
CircuitBreaker: nil,
LoadBalancer: nil,
},
"awesome/quix": {
Servers: map[string]types.Server{
"1": {
URL: "http://10.0.0.1:801",
Weight: 1,
},
},
CircuitBreaker: nil,
LoadBalancer: nil,
},
},
Frontends: map[string]*types.Frontend{
"foo/bar": {
Backend: "foo/bar",
Routes: map[string]types.Route{
"/bar": {
Rule: "PathPrefixStrip:/bar",
},
"foo": {
Rule: "Host:foo",
},
},
},
"bar": {
Backend: "bar",
Routes: map[string]types.Route{
"bar": {
Rule: "Host:bar",
},
},
},
"awesome/quix": {
Backend: "awesome/quix",
Routes: map[string]types.Route{
"/quix": {
Rule: "PathPrefixStrip:/quix",
},
"awesome": {
Rule: "Host:awesome",
},
},
},
},
}
actualJSON, _ := json.Marshal(actual)
expectedJSON, _ := json.Marshal(expected)
if !reflect.DeepEqual(actual, expected) {
t.Fatalf("expected %+v, got %+v", string(expectedJSON), string(actualJSON))
}
}
type clientMock struct {
ingresses []k8s.Ingress
services []k8s.Service
@ -174,7 +602,13 @@ type clientMock struct {
}
func (c clientMock) GetIngresses(predicate func(k8s.Ingress) bool) ([]k8s.Ingress, error) {
return c.ingresses, nil
var ingresses []k8s.Ingress
for _, ingress := range c.ingresses {
if predicate(ingress) {
ingresses = append(ingresses, ingress)
}
}
return ingresses, nil
}
func (c clientMock) WatchIngresses(predicate func(k8s.Ingress) bool, stopCh <-chan bool) (chan interface{}, chan error, error) {
return c.watchChan, make(chan error), nil

1
traefik.sample.toml
View File

@ -343,6 +343,7 @@
# Optional
#
# endpoint = "http://localhost:8080"
# namespaces = ["default"]
################################################################
# Consul KV configuration backend