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Add tests for controller getEndpoints #2401

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Apr 22, 2018
Merged

Add tests for controller getEndpoints #2401

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105 changes: 6 additions & 99 deletions internal/ingress/controller/controller.go
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Original file line number Diff line number Diff line change
Expand Up @@ -19,8 +19,6 @@ package controller
import (
"fmt"
"math/rand"
"net"
"reflect"
"sort"
"strconv"
"strings"
Expand Down Expand Up @@ -291,7 +289,7 @@ func (n *NGINXController) getStreamServices(configmapName string, proto apiv1.Pr
for _, sp := range svc.Spec.Ports {
if sp.Name == svcPort {
if sp.Protocol == proto {
endps = n.getEndpoints(svc, &sp, proto, &healthcheck.Config{})
endps = getEndpoints(svc, &sp, proto, &healthcheck.Config{}, n.store.GetServiceEndpoints)
break
}
}
Expand All @@ -302,7 +300,7 @@ func (n *NGINXController) getStreamServices(configmapName string, proto apiv1.Pr
for _, sp := range svc.Spec.Ports {
if sp.Port == int32(targetPort) {
if sp.Protocol == proto {
endps = n.getEndpoints(svc, &sp, proto, &healthcheck.Config{})
endps = getEndpoints(svc, &sp, proto, &healthcheck.Config{}, n.store.GetServiceEndpoints)
break
}
}
Expand Down Expand Up @@ -347,7 +345,7 @@ func (n *NGINXController) getDefaultUpstream() *ingress.Backend {
return upstream
}

endps := n.getEndpoints(svc, &svc.Spec.Ports[0], apiv1.ProtocolTCP, &healthcheck.Config{})
endps := getEndpoints(svc, &svc.Spec.Ports[0], apiv1.ProtocolTCP, &healthcheck.Config{}, n.store.GetServiceEndpoints)
if len(endps) == 0 {
glog.Warningf("service %v does not have any active endpoints", svcKey)
endps = []ingress.Endpoint{n.DefaultEndpoint()}
Expand Down Expand Up @@ -528,7 +526,7 @@ func (n *NGINXController) getBackendServers(ingresses []*extensions.Ingress) ([]
// check if the location contains endpoints and a custom default backend
if location.DefaultBackend != nil {
sp := location.DefaultBackend.Spec.Ports[0]
endps := n.getEndpoints(location.DefaultBackend, &sp, apiv1.ProtocolTCP, &healthcheck.Config{})
endps := getEndpoints(location.DefaultBackend, &sp, apiv1.ProtocolTCP, &healthcheck.Config{}, n.store.GetServiceEndpoints)
if len(endps) > 0 {
glog.V(3).Infof("using custom default backend in server %v location %v (service %v/%v)",
server.Hostname, location.Path, location.DefaultBackend.Namespace, location.DefaultBackend.Name)
Expand Down Expand Up @@ -770,7 +768,7 @@ func (n *NGINXController) serviceEndpoints(svcKey, backendPort string,
servicePort.TargetPort.String() == backendPort ||
servicePort.Name == backendPort {

endps := n.getEndpoints(svc, &servicePort, apiv1.ProtocolTCP, hz)
endps := getEndpoints(svc, &servicePort, apiv1.ProtocolTCP, hz, n.store.GetServiceEndpoints)
if len(endps) == 0 {
glog.Warningf("service %v does not have any active endpoints", svcKey)
}
Expand Down Expand Up @@ -804,7 +802,7 @@ func (n *NGINXController) serviceEndpoints(svcKey, backendPort string,
Port: int32(externalPort),
TargetPort: intstr.FromString(backendPort),
}
endps := n.getEndpoints(svc, &servicePort, apiv1.ProtocolTCP, hz)
endps := getEndpoints(svc, &servicePort, apiv1.ProtocolTCP, hz, n.store.GetServiceEndpoints)
if len(endps) == 0 {
glog.Warningf("service %v does not have any active endpoints", svcKey)
return upstreams, nil
Expand Down Expand Up @@ -1057,97 +1055,6 @@ func (n *NGINXController) createServers(data []*extensions.Ingress,
return servers
}

// getEndpoints returns a list of <endpoint ip>:<port> for a given service/target port combination.
func (n *NGINXController) getEndpoints(
s *apiv1.Service,
servicePort *apiv1.ServicePort,
proto apiv1.Protocol,
hz *healthcheck.Config) []ingress.Endpoint {

upsServers := []ingress.Endpoint{}

// avoid duplicated upstream servers when the service
// contains multiple port definitions sharing the same
// targetport.
adus := make(map[string]bool)

// ExternalName services
if s.Spec.Type == apiv1.ServiceTypeExternalName {
glog.V(3).Infof("Ingress using a service %v of type=ExternalName : %v", s.Name)

targetPort := servicePort.TargetPort.IntValue()
// check for invalid port value
if targetPort <= 0 {
glog.Errorf("ExternalName service with an invalid port: %v", targetPort)
return upsServers
}

if net.ParseIP(s.Spec.ExternalName) == nil {
_, err := net.LookupHost(s.Spec.ExternalName)
if err != nil {
glog.Errorf("unexpected error resolving host %v: %v", s.Spec.ExternalName, err)
return upsServers
}
}

return append(upsServers, ingress.Endpoint{
Address: s.Spec.ExternalName,
Port: fmt.Sprintf("%v", targetPort),
MaxFails: hz.MaxFails,
FailTimeout: hz.FailTimeout,
})
}

glog.V(3).Infof("getting endpoints for service %v/%v and port %v", s.Namespace, s.Name, servicePort.String())
ep, err := n.store.GetServiceEndpoints(s)
if err != nil {
glog.Warningf("unexpected error obtaining service endpoints: %v", err)
return upsServers
}

for _, ss := range ep.Subsets {
for _, epPort := range ss.Ports {

if !reflect.DeepEqual(epPort.Protocol, proto) {
continue
}

var targetPort int32

if servicePort.Name == "" {
// ServicePort.Name is optional if there is only one port
targetPort = epPort.Port
} else if servicePort.Name == epPort.Name {
targetPort = epPort.Port
}

// check for invalid port value
if targetPort <= 0 {
continue
}

for _, epAddress := range ss.Addresses {
ep := fmt.Sprintf("%v:%v", epAddress.IP, targetPort)
if _, exists := adus[ep]; exists {
continue
}
ups := ingress.Endpoint{
Address: epAddress.IP,
Port: fmt.Sprintf("%v", targetPort),
MaxFails: hz.MaxFails,
FailTimeout: hz.FailTimeout,
Target: epAddress.TargetRef,
}
upsServers = append(upsServers, ups)
adus[ep] = true
}
}
}

glog.V(3).Infof("endpoints found: %v", upsServers)
return upsServers
}

func (n *NGINXController) isForceReload() bool {
return atomic.LoadInt32(&n.forceReload) != 0
}
Expand Down
128 changes: 128 additions & 0 deletions internal/ingress/controller/endpoints.go
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Original file line number Diff line number Diff line change
@@ -0,0 +1,128 @@
/*
Copyright 2018 The Kubernetes Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package controller

import (
"fmt"
"net"
"reflect"

"github.com/golang/glog"

corev1 "k8s.io/api/core/v1"

"k8s.io/ingress-nginx/internal/ingress"
"k8s.io/ingress-nginx/internal/ingress/annotations/healthcheck"
)

// getEndpoints returns a list of <endpoint ip>:<port> for a given service/target port combination.
func getEndpoints(
s *corev1.Service,
port *corev1.ServicePort,
proto corev1.Protocol,
hz *healthcheck.Config,
getServiceEndpoints func(*corev1.Service) (*corev1.Endpoints, error),
) []ingress.Endpoint {

upsServers := []ingress.Endpoint{}

if s == nil || port == nil {
return upsServers
}

// avoid duplicated upstream servers when the service
// contains multiple port definitions sharing the same
// targetport.
adus := make(map[string]bool)

// ExternalName services
if s.Spec.Type == corev1.ServiceTypeExternalName {
glog.V(3).Infof("Ingress using a service %v of type=ExternalName : %v", s.Name)

targetPort := port.TargetPort.IntValue()
// check for invalid port value
if targetPort <= 0 {
glog.Errorf("ExternalName service with an invalid port: %v", targetPort)
return upsServers
}

if net.ParseIP(s.Spec.ExternalName) == nil {
_, err := net.LookupHost(s.Spec.ExternalName)
if err != nil {
glog.Errorf("unexpected error resolving host %v: %v", s.Spec.ExternalName, err)
return upsServers
}
}

return append(upsServers, ingress.Endpoint{
Address: s.Spec.ExternalName,
Port: fmt.Sprintf("%v", targetPort),
MaxFails: hz.MaxFails,
FailTimeout: hz.FailTimeout,
})
}

glog.V(3).Infof("getting endpoints for service %v/%v and port %v", s.Namespace, s.Name, port.String())
ep, err := getServiceEndpoints(s)
if err != nil {
glog.Warningf("unexpected error obtaining service endpoints: %v", err)
return upsServers
}

for _, ss := range ep.Subsets {
for _, epPort := range ss.Ports {

if !reflect.DeepEqual(epPort.Protocol, proto) {
continue
}

var targetPort int32

if port.Name == "" {
// port.Name is optional if there is only one port
targetPort = epPort.Port
} else if port.Name == epPort.Name {
targetPort = epPort.Port
}

glog.Infof("TP: %v", targetPort)
// check for invalid port value
if targetPort <= 0 {
continue
}

for _, epAddress := range ss.Addresses {
ep := fmt.Sprintf("%v:%v", epAddress.IP, targetPort)
if _, exists := adus[ep]; exists {
continue
}
ups := ingress.Endpoint{
Address: epAddress.IP,
Port: fmt.Sprintf("%v", targetPort),
MaxFails: hz.MaxFails,
FailTimeout: hz.FailTimeout,
Target: epAddress.TargetRef,
}
upsServers = append(upsServers, ups)
adus[ep] = true
}
}
}

glog.V(3).Infof("endpoints found: %v", upsServers)
return upsServers
}
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