412cd70d3a
Adds the ability to create alternative backends. Alternative backends enable traffic shaping by sharing a single location but routing to different backends depending on the TrafficShapingPolicy defined by AlternativeBackends. When the list of upstreams and servers are retrieved, we then call mergeAlternativeBackends which iterates through the paths of every ingress and checks if the backend supporting the path is a AlternativeBackend. If so, we then iterate through the map of servers and find the real backend that the AlternativeBackend should fall under. Once found, the AlternativeBackend is embedded in the list of VirtualBackends for the real backend. If no matching real backend for a AlternativeBackend is found, then the AlternativeBackend is deleted as it cannot be backed by any server.
350 lines
8.1 KiB
Go
350 lines
8.1 KiB
Go
/*
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Copyright 2018 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package controller
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import (
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"crypto/x509"
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"crypto/x509/pkix"
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"encoding/asn1"
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"k8s.io/apimachinery/pkg/util/intstr"
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"testing"
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extensions "k8s.io/api/extensions/v1beta1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/ingress-nginx/internal/ingress"
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)
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func TestMergeAlternativeBackends(t *testing.T) {
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testCases := map[string]struct {
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ingress *extensions.Ingress
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upstreams map[string]*ingress.Backend
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servers map[string]*ingress.Server
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expNumAlternativeBackends int
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expNumLocations int
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}{
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"alternative backend has no server and embeds into matching real backend": {
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&extensions.Ingress{
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ObjectMeta: metav1.ObjectMeta{
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Namespace: "example",
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},
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Spec: extensions.IngressSpec{
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Rules: []extensions.IngressRule{
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{
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Host: "example.com",
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IngressRuleValue: extensions.IngressRuleValue{
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HTTP: &extensions.HTTPIngressRuleValue{
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Paths: []extensions.HTTPIngressPath{
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{
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Path: "/",
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Backend: extensions.IngressBackend{
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ServiceName: "http-svc-canary",
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ServicePort: intstr.IntOrString{
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Type: intstr.Int,
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IntVal: 80,
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},
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},
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},
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},
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},
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},
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},
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},
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},
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},
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map[string]*ingress.Backend{
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"example-http-svc-80": {
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Name: "example-http-svc-80",
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NoServer: false,
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},
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"example-http-svc-canary-80": {
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Name: "example-http-svc-canary-80",
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NoServer: true,
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TrafficShapingPolicy: ingress.TrafficShapingPolicy{
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Weight: 20,
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},
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},
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},
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map[string]*ingress.Server{
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"example.com": {
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Hostname: "example.com",
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Locations: []*ingress.Location{
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{
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Path: "/",
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Backend: "example-http-svc-80",
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},
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},
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},
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},
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1,
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1,
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},
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"merging a alternative backend matches with the correct host": {
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&extensions.Ingress{
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ObjectMeta: metav1.ObjectMeta{
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Namespace: "example",
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},
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Spec: extensions.IngressSpec{
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Rules: []extensions.IngressRule{
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{
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Host: "foo.bar",
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IngressRuleValue: extensions.IngressRuleValue{
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HTTP: &extensions.HTTPIngressRuleValue{
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Paths: []extensions.HTTPIngressPath{
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{
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Path: "/",
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Backend: extensions.IngressBackend{
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ServiceName: "foo-http-svc-canary",
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ServicePort: intstr.IntOrString{
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Type: intstr.Int,
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IntVal: 80,
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},
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},
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},
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},
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},
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},
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},
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{
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Host: "example.com",
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IngressRuleValue: extensions.IngressRuleValue{
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HTTP: &extensions.HTTPIngressRuleValue{
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Paths: []extensions.HTTPIngressPath{
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{
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Path: "/",
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Backend: extensions.IngressBackend{
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ServiceName: "http-svc-canary",
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ServicePort: intstr.IntOrString{
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Type: intstr.Int,
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IntVal: 80,
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},
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},
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},
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},
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},
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},
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},
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},
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},
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},
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map[string]*ingress.Backend{
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"example-foo-http-svc-80": {
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Name: "example-foo-http-svc-80",
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NoServer: false,
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},
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"example-foo-http-svc-canary-80": {
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Name: "example-foo-http-svc-canary-80",
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NoServer: true,
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TrafficShapingPolicy: ingress.TrafficShapingPolicy{
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Weight: 20,
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},
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},
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"example-http-svc-80": {
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Name: "example-http-svc-80",
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NoServer: false,
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},
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"example-http-svc-canary-80": {
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Name: "example-http-svc-canary-80",
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NoServer: true,
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TrafficShapingPolicy: ingress.TrafficShapingPolicy{
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Weight: 20,
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},
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},
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},
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map[string]*ingress.Server{
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"foo.bar": {
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Hostname: "foo.bar",
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Locations: []*ingress.Location{
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{
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Path: "/",
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Backend: "example-foo-http-svc-80",
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},
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},
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},
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"example.com": {
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Hostname: "example.com",
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Locations: []*ingress.Location{
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{
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Path: "/",
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Backend: "example-http-svc-80",
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},
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},
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},
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},
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1,
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1,
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},
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}
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for title, tc := range testCases {
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t.Run(title, func(t *testing.T) {
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mergeAlternativeBackends(tc.ingress, tc.upstreams, tc.servers)
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numAlternativeBackends := len(tc.upstreams["example-http-svc-80"].AlternativeBackends)
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if numAlternativeBackends != tc.expNumAlternativeBackends {
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t.Errorf("expected %d alternative backends (got %d)", tc.expNumAlternativeBackends, numAlternativeBackends)
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}
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numLocations := len(tc.servers["example.com"].Locations)
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if numLocations != tc.expNumLocations {
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t.Errorf("expected %d locations (got %d)", tc.expNumLocations, numLocations)
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}
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})
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}
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}
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func TestExtractTLSSecretName(t *testing.T) {
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testCases := map[string]struct {
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host string
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ingress *extensions.Ingress
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fn func(string) (*ingress.SSLCert, error)
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expName string
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}{
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"nil ingress": {
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"foo.bar",
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nil,
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func(string) (*ingress.SSLCert, error) {
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return nil, nil
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},
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"",
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},
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"empty ingress": {
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"foo.bar",
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&extensions.Ingress{},
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func(string) (*ingress.SSLCert, error) {
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return nil, nil
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},
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"",
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},
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"ingress tls, nil secret": {
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"foo.bar",
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&extensions.Ingress{
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ObjectMeta: metav1.ObjectMeta{
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Name: "test",
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},
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Spec: extensions.IngressSpec{
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TLS: []extensions.IngressTLS{
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{SecretName: "demo"},
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},
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Rules: []extensions.IngressRule{
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{
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Host: "foo.bar",
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},
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},
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},
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},
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func(string) (*ingress.SSLCert, error) {
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return nil, nil
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},
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"",
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},
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"ingress tls, no host, matching cert cn": {
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"foo.bar",
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&extensions.Ingress{
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ObjectMeta: metav1.ObjectMeta{
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Name: "test",
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},
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Spec: extensions.IngressSpec{
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TLS: []extensions.IngressTLS{
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{SecretName: "demo"},
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},
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Rules: []extensions.IngressRule{
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{
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Host: "foo.bar",
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},
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},
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},
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},
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func(string) (*ingress.SSLCert, error) {
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return &ingress.SSLCert{
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Certificate: fakeX509Cert([]string{"foo.bar", "example.com"}),
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}, nil
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},
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"demo",
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},
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"ingress tls, no host, wildcard cert with matching cn": {
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"foo.bar",
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&extensions.Ingress{
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ObjectMeta: metav1.ObjectMeta{
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Name: "test",
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},
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Spec: extensions.IngressSpec{
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TLS: []extensions.IngressTLS{
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{
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SecretName: "demo",
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},
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},
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Rules: []extensions.IngressRule{
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{
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Host: "test.foo.bar",
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},
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},
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},
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},
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func(string) (*ingress.SSLCert, error) {
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return &ingress.SSLCert{
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Certificate: fakeX509Cert([]string{"*.foo.bar", "foo.bar"}),
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}, nil
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},
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"demo",
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},
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"ingress tls, hosts, matching cert cn": {
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"foo.bar",
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&extensions.Ingress{
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ObjectMeta: metav1.ObjectMeta{
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Name: "test",
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},
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Spec: extensions.IngressSpec{
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TLS: []extensions.IngressTLS{
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{
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Hosts: []string{"foo.bar", "example.com"},
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SecretName: "demo",
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},
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},
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Rules: []extensions.IngressRule{
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{
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Host: "foo.bar",
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},
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},
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},
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},
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func(string) (*ingress.SSLCert, error) {
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return nil, nil
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},
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"demo",
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},
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}
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for title, tc := range testCases {
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t.Run(title, func(t *testing.T) {
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name := extractTLSSecretName(tc.host, tc.ingress, tc.fn)
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if name != tc.expName {
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t.Errorf("Expected Secret name %q (got %q)", tc.expName, name)
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}
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})
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}
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}
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var oidExtensionSubjectAltName = asn1.ObjectIdentifier{2, 5, 29, 17}
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func fakeX509Cert(dnsNames []string) *x509.Certificate {
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return &x509.Certificate{
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DNSNames: dnsNames,
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Extensions: []pkix.Extension{
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{Id: oidExtensionSubjectAltName},
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},
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}
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}
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