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Fix wildcard hostname issue

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This commit is contained in:
Avdhoot Dendge 2021-01-05 16:56:04 +05:30 committed by GitHub
parent c4fa96c41e
commit d4f0a9ff62
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8 changed files with 193 additions and 1 deletions
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15
pkg/provider/kubernetes/ingress/fixtures/Ingress-with-conflicting-routers-on-host_endpoint.yml Normal file
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@ -0,0 +1,15 @@
kind: Endpoints
apiVersion: v1
metadata:
name: service1
namespace: testing
subsets:
- addresses:
- ip: 10.10.0.1
ports:
- port: 8080
- addresses:
- ip: 10.21.0.1
ports:
- port: 8080

23
pkg/provider/kubernetes/ingress/fixtures/Ingress-with-conflicting-routers-on-host_ingress.yml Normal file
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@ -0,0 +1,23 @@
kind: Ingress
apiVersion: networking.k8s.io/v1beta1
metadata:
name: ""
namespace: testing
spec:
rules:
- host: "*.bar"
http:
paths:
- path: /bar
backend:
serviceName: service1
servicePort: 80
- host: "bar"
http:
paths:
- path: /bar
backend:
serviceName: service1
servicePort: 80

10
pkg/provider/kubernetes/ingress/fixtures/Ingress-with-conflicting-routers-on-host_service.yml Normal file
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@ -0,0 +1,10 @@
kind: Service
apiVersion: v1
metadata:
name: service1
namespace: testing
spec:
ports:
- port: 80
clusterIp: 10.0.0.1

15
pkg/provider/kubernetes/ingress/fixtures/Ingress-with-conflicting-routers-on-path_endpoint.yml Normal file
View file

@ -0,0 +1,15 @@
kind: Endpoints
apiVersion: v1
metadata:
name: service1
namespace: testing
subsets:
- addresses:
- ip: 10.10.0.1
ports:
- port: 8080
- addresses:
- ip: 10.21.0.1
ports:
- port: 8080

19
pkg/provider/kubernetes/ingress/fixtures/Ingress-with-conflicting-routers-on-path_ingress.yml Normal file
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@ -0,0 +1,19 @@
kind: Ingress
apiVersion: networking.k8s.io/v1beta1
metadata:
name: ""
namespace: testing
spec:
rules:
- http:
paths:
- path: /foo/bar
backend:
serviceName: service1
servicePort: 80
- path: /foo-bar
backend:
serviceName: service1
servicePort: 80

10
pkg/provider/kubernetes/ingress/fixtures/Ingress-with-conflicting-routers-on-path_service.yml Normal file
View file

@ -0,0 +1,10 @@
kind: Service
apiVersion: v1
metadata:
name: service1
namespace: testing
spec:
ports:
- port: 80
clusterIp: 10.0.0.1

34
pkg/provider/kubernetes/ingress/kubernetes.go
View file

@ -2,6 +2,7 @@ package ingress
import (
"context"
"crypto/sha256"
"errors"
"fmt"
"math"
@ -253,6 +254,8 @@ func (p *Provider) loadConfigurationFromIngresses(ctx context.Context, client Cl
conf.HTTP.Services["default-backend"] = service
}
routers := map[string][]*dynamic.Router{}
for _, rule := range ingress.Spec.Rules {
if err := p.updateIngressStatus(ingress, client); err != nil {
log.FromContext(ctx).Errorf("Error while updating ingress status: %v", err)
@ -276,8 +279,26 @@ func (p *Provider) loadConfigurationFromIngresses(ctx context.Context, client Cl
conf.HTTP.Services[serviceName] = service
routerKey := strings.TrimPrefix(provider.Normalize(ingress.Name+"-"+ingress.Namespace+"-"+rule.Host+pa.Path), "-")
routers[routerKey] = append(routers[routerKey], loadRouter(rule, pa, rtConfig, serviceName))
}
}
conf.HTTP.Routers[routerKey] = loadRouter(rule, pa, rtConfig, serviceName)
for routerKey, conflictingRouters := range routers {
if len(conflictingRouters) == 1 {
conf.HTTP.Routers[routerKey] = conflictingRouters[0]
continue
}
log.FromContext(ctx).Debugf("Multiple routers are defined with the same key %q, generating hashes to avoid conflicts", routerKey)
for _, router := range conflictingRouters {
key, err := makeRouterKeyWithHash(routerKey, router.Rule)
if err != nil {
log.FromContext(ctx).Error(err)
continue
}
conf.HTTP.Routers[key] = router
}
}
}
@ -543,6 +564,17 @@ func getProtocol(portSpec corev1.ServicePort, portName string, svcConfig *Servic
return protocol
}
func makeRouterKeyWithHash(key, rule string) (string, error) {
h := sha256.New()
if _, err := h.Write([]byte(rule)); err != nil {
return "", err
}
dupKey := fmt.Sprintf("%s-%.10x", key, h.Sum(nil))
return dupKey, nil
}
func loadRouter(rule networkingv1beta1.IngressRule, pa networkingv1beta1.HTTPIngressPath, rtConfig *RouterConfig, serviceName string) *dynamic.Router {
var rules []string
if len(rule.Host) > 0 {

68
pkg/provider/kubernetes/ingress/kubernetes_test.go
View file

@ -169,6 +169,74 @@ func TestLoadConfigurationFromIngresses(t *testing.T) {
},
},
},
{
desc: "Ingress with conflicting routers on host",
expected: &dynamic.Configuration{
TCP: &dynamic.TCPConfiguration{},
HTTP: &dynamic.HTTPConfiguration{
Middlewares: map[string]*dynamic.Middleware{},
Routers: map[string]*dynamic.Router{
"testing-bar-bar-3be6cfd7daba66cf2fdd": {
Rule: "HostRegexp(`{subdomain:[a-zA-Z0-9-]+}.bar`) && PathPrefix(`/bar`)",
Service: "testing-service1-80",
},
"testing-bar-bar-636bf36c00fedaab3d44": {
Rule: "Host(`bar`) && PathPrefix(`/bar`)",
Service: "testing-service1-80",
},
},
Services: map[string]*dynamic.Service{
"testing-service1-80": {
LoadBalancer: &dynamic.ServersLoadBalancer{
PassHostHeader: Bool(true),
Servers: []dynamic.Server{
{
URL: "http://10.10.0.1:8080",
},
{
URL: "http://10.21.0.1:8080",
},
},
},
},
},
},
},
},
{
desc: "Ingress with conflicting routers on path",
expected: &dynamic.Configuration{
TCP: &dynamic.TCPConfiguration{},
HTTP: &dynamic.HTTPConfiguration{
Middlewares: map[string]*dynamic.Middleware{},
Routers: map[string]*dynamic.Router{
"testing-foo-bar-d0b30949e54d6a7515ca": {
Rule: "PathPrefix(`/foo/bar`)",
Service: "testing-service1-80",
},
"testing-foo-bar-dcd54bae39a6d7557f48": {
Rule: "PathPrefix(`/foo-bar`)",
Service: "testing-service1-80",
},
},
Services: map[string]*dynamic.Service{
"testing-service1-80": {
LoadBalancer: &dynamic.ServersLoadBalancer{
PassHostHeader: Bool(true),
Servers: []dynamic.Server{
{
URL: "http://10.10.0.1:8080",
},
{
URL: "http://10.21.0.1:8080",
},
},
},
},
},
},
},
},
{
desc: "Ingress one rule with two paths",
expected: &dynamic.Configuration{