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controller.go
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/*
Copyright 2015 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 main
import (
"encoding/json"
"fmt"
"reflect"
"sort"
"strconv"
"strings"
"sync"
"time"
"github.com/golang/glog"
"k8s.io/kubernetes/pkg/api"
podutil "k8s.io/kubernetes/pkg/api/pod"
"k8s.io/kubernetes/pkg/apis/extensions"
"k8s.io/kubernetes/pkg/client/cache"
"k8s.io/kubernetes/pkg/client/record"
client "k8s.io/kubernetes/pkg/client/unversioned"
"k8s.io/kubernetes/pkg/controller/framework"
"k8s.io/kubernetes/pkg/labels"
"k8s.io/kubernetes/pkg/runtime"
"k8s.io/kubernetes/pkg/util/intstr"
"k8s.io/kubernetes/pkg/watch"
"k8s.io/contrib/ingress/controllers/nginx/nginx"
"k8s.io/contrib/ingress/controllers/nginx/nginx/auth"
"k8s.io/contrib/ingress/controllers/nginx/nginx/authreq"
"k8s.io/contrib/ingress/controllers/nginx/nginx/config"
"k8s.io/contrib/ingress/controllers/nginx/nginx/cors"
"k8s.io/contrib/ingress/controllers/nginx/nginx/healthcheck"
"k8s.io/contrib/ingress/controllers/nginx/nginx/ingress"
"k8s.io/contrib/ingress/controllers/nginx/nginx/ipwhitelist"
"k8s.io/contrib/ingress/controllers/nginx/nginx/ratelimit"
"k8s.io/contrib/ingress/controllers/nginx/nginx/rewrite"
"k8s.io/contrib/ingress/controllers/nginx/nginx/secureupstream"
)
const (
defUpstreamName = "upstream-default-backend"
defServerName = "_"
namedPortAnnotation = "ingress.kubernetes.io/named-ports"
podStoreSyncedPollPeriod = 1 * time.Second
rootLocation = "/"
)
var (
keyFunc = framework.DeletionHandlingMetaNamespaceKeyFunc
)
type namedPortMapping map[string]string
// getPort returns the port defined in a named port
func (npm namedPortMapping) getPort(name string) (string, bool) {
val, ok := npm.getPortMappings()[name]
return val, ok
}
// getPortMappings returns the map containing the
// mapping of named port names and the port number
func (npm namedPortMapping) getPortMappings() map[string]string {
data := npm[namedPortAnnotation]
var mapping map[string]string
if data == "" {
return mapping
}
if err := json.Unmarshal([]byte(data), &mapping); err != nil {
glog.Errorf("unexpected error reading annotations: %v", err)
}
return mapping
}
// loadBalancerController watches the kubernetes api and adds/removes services
// from the loadbalancer
type loadBalancerController struct {
client *client.Client
ingController *framework.Controller
endpController *framework.Controller
svcController *framework.Controller
secrController *framework.Controller
mapController *framework.Controller
ingLister StoreToIngressLister
svcLister cache.StoreToServiceLister
endpLister cache.StoreToEndpointsLister
secrLister StoreToSecretsLister
mapLister StoreToConfigmapLister
nginx *nginx.Manager
podInfo *podInfo
defaultSvc string
nxgConfigMap string
tcpConfigMap string
udpConfigMap string
defSSLCertificate string
defHealthzURL string
recorder record.EventRecorder
syncQueue *taskQueue
// taskQueue used to update the status of the Ingress rules.
// this avoids a sync execution in the ResourceEventHandlerFuncs
ingQueue *taskQueue
// stopLock is used to enforce only a single call to Stop is active.
// Needed because we allow stopping through an http endpoint and
// allowing concurrent stoppers leads to stack traces.
stopLock sync.Mutex
shutdown bool
stopCh chan struct{}
}
// newLoadBalancerController creates a controller for nginx loadbalancer
func newLoadBalancerController(kubeClient *client.Client, resyncPeriod time.Duration,
defaultSvc, namespace, nxgConfigMapName, tcpConfigMapName, udpConfigMapName,
defSSLCertificate, defHealthzURL string, runtimeInfo *podInfo) (*loadBalancerController, error) {
eventBroadcaster := record.NewBroadcaster()
eventBroadcaster.StartLogging(glog.Infof)
eventBroadcaster.StartRecordingToSink(kubeClient.Events(namespace))
lbc := loadBalancerController{
client: kubeClient,
stopCh: make(chan struct{}),
podInfo: runtimeInfo,
nginx: nginx.NewManager(kubeClient),
nxgConfigMap: nxgConfigMapName,
tcpConfigMap: tcpConfigMapName,
udpConfigMap: udpConfigMapName,
defSSLCertificate: defSSLCertificate,
defaultSvc: defaultSvc,
defHealthzURL: defHealthzURL,
recorder: eventBroadcaster.NewRecorder(api.EventSource{
Component: "nginx-ingress-controller",
}),
}
lbc.syncQueue = NewTaskQueue(lbc.sync)
lbc.ingQueue = NewTaskQueue(lbc.updateIngressStatus)
ingEventHandler := framework.ResourceEventHandlerFuncs{
AddFunc: func(obj interface{}) {
addIng := obj.(*extensions.Ingress)
if !isNGINXIngress(addIng) {
glog.Infof("Ignoring add for ingress %v based on annotation %v", addIng.Name, ingressClassKey)
return
}
lbc.recorder.Eventf(addIng, api.EventTypeNormal, "CREATE", fmt.Sprintf("%s/%s", addIng.Namespace, addIng.Name))
lbc.ingQueue.enqueue(obj)
lbc.syncQueue.enqueue(obj)
},
DeleteFunc: func(obj interface{}) {
delIng := obj.(*extensions.Ingress)
if !isNGINXIngress(delIng) {
glog.Infof("Ignoring add for ingress %v based on annotation %v", delIng.Name, ingressClassKey)
return
}
lbc.recorder.Eventf(delIng, api.EventTypeNormal, "DELETE", fmt.Sprintf("%s/%s", delIng.Namespace, delIng.Name))
lbc.syncQueue.enqueue(obj)
},
UpdateFunc: func(old, cur interface{}) {
curIng := cur.(*extensions.Ingress)
if !isNGINXIngress(curIng) {
return
}
if !reflect.DeepEqual(old, cur) {
upIng := cur.(*extensions.Ingress)
lbc.recorder.Eventf(upIng, api.EventTypeNormal, "UPDATE", fmt.Sprintf("%s/%s", upIng.Namespace, upIng.Name))
lbc.ingQueue.enqueue(cur)
lbc.syncQueue.enqueue(cur)
}
},
}
secrEventHandler := framework.ResourceEventHandlerFuncs{
AddFunc: func(obj interface{}) {
addSecr := obj.(*api.Secret)
if lbc.secrReferenced(addSecr.Namespace, addSecr.Name) {
lbc.recorder.Eventf(addSecr, api.EventTypeNormal, "CREATE", fmt.Sprintf("%s/%s", addSecr.Namespace, addSecr.Name))
lbc.syncQueue.enqueue(obj)
}
},
DeleteFunc: func(obj interface{}) {
delSecr := obj.(*api.Secret)
if lbc.secrReferenced(delSecr.Namespace, delSecr.Name) {
lbc.recorder.Eventf(delSecr, api.EventTypeNormal, "DELETE", fmt.Sprintf("%s/%s", delSecr.Namespace, delSecr.Name))
lbc.syncQueue.enqueue(obj)
}
},
UpdateFunc: func(old, cur interface{}) {
if !reflect.DeepEqual(old, cur) {
upSecr := cur.(*api.Secret)
if lbc.secrReferenced(upSecr.Namespace, upSecr.Name) {
lbc.recorder.Eventf(upSecr, api.EventTypeNormal, "UPDATE", fmt.Sprintf("%s/%s", upSecr.Namespace, upSecr.Name))
lbc.syncQueue.enqueue(cur)
}
}
},
}
eventHandler := framework.ResourceEventHandlerFuncs{
AddFunc: func(obj interface{}) {
lbc.syncQueue.enqueue(obj)
},
DeleteFunc: func(obj interface{}) {
lbc.syncQueue.enqueue(obj)
},
UpdateFunc: func(old, cur interface{}) {
if !reflect.DeepEqual(old, cur) {
lbc.syncQueue.enqueue(cur)
}
},
}
mapEventHandler := framework.ResourceEventHandlerFuncs{
UpdateFunc: func(old, cur interface{}) {
if !reflect.DeepEqual(old, cur) {
upCmap := cur.(*api.ConfigMap)
mapKey := fmt.Sprintf("%s/%s", upCmap.Namespace, upCmap.Name)
// updates to configuration configmaps can trigger an update
if mapKey == lbc.nxgConfigMap || mapKey == lbc.tcpConfigMap || mapKey == lbc.udpConfigMap {
lbc.recorder.Eventf(upCmap, api.EventTypeNormal, "UPDATE", mapKey)
lbc.syncQueue.enqueue(cur)
}
}
},
}
lbc.ingLister.Store, lbc.ingController = framework.NewInformer(
&cache.ListWatch{
ListFunc: ingressListFunc(lbc.client, namespace),
WatchFunc: ingressWatchFunc(lbc.client, namespace),
},
&extensions.Ingress{}, resyncPeriod, ingEventHandler)
lbc.endpLister.Store, lbc.endpController = framework.NewInformer(
&cache.ListWatch{
ListFunc: endpointsListFunc(lbc.client, namespace),
WatchFunc: endpointsWatchFunc(lbc.client, namespace),
},
&api.Endpoints{}, resyncPeriod, eventHandler)
lbc.svcLister.Store, lbc.svcController = framework.NewInformer(
&cache.ListWatch{
ListFunc: serviceListFunc(lbc.client, namespace),
WatchFunc: serviceWatchFunc(lbc.client, namespace),
},
&api.Service{}, resyncPeriod, framework.ResourceEventHandlerFuncs{})
lbc.secrLister.Store, lbc.secrController = framework.NewInformer(
&cache.ListWatch{
ListFunc: secretsListFunc(lbc.client, namespace),
WatchFunc: secretsWatchFunc(lbc.client, namespace),
},
&api.Secret{}, resyncPeriod, secrEventHandler)
lbc.mapLister.Store, lbc.mapController = framework.NewInformer(
&cache.ListWatch{
ListFunc: mapListFunc(lbc.client, namespace),
WatchFunc: mapWatchFunc(lbc.client, namespace),
},
&api.ConfigMap{}, resyncPeriod, mapEventHandler)
return &lbc, nil
}
func ingressListFunc(c *client.Client, ns string) func(api.ListOptions) (runtime.Object, error) {
return func(opts api.ListOptions) (runtime.Object, error) {
return c.Extensions().Ingress(ns).List(opts)
}
}
func ingressWatchFunc(c *client.Client, ns string) func(options api.ListOptions) (watch.Interface, error) {
return func(options api.ListOptions) (watch.Interface, error) {
return c.Extensions().Ingress(ns).Watch(options)
}
}
func serviceListFunc(c *client.Client, ns string) func(api.ListOptions) (runtime.Object, error) {
return func(opts api.ListOptions) (runtime.Object, error) {
return c.Services(ns).List(opts)
}
}
func serviceWatchFunc(c *client.Client, ns string) func(options api.ListOptions) (watch.Interface, error) {
return func(options api.ListOptions) (watch.Interface, error) {
return c.Services(ns).Watch(options)
}
}
func endpointsListFunc(c *client.Client, ns string) func(api.ListOptions) (runtime.Object, error) {
return func(opts api.ListOptions) (runtime.Object, error) {
return c.Endpoints(ns).List(opts)
}
}
func endpointsWatchFunc(c *client.Client, ns string) func(options api.ListOptions) (watch.Interface, error) {
return func(options api.ListOptions) (watch.Interface, error) {
return c.Endpoints(ns).Watch(options)
}
}
func secretsListFunc(c *client.Client, ns string) func(api.ListOptions) (runtime.Object, error) {
return func(opts api.ListOptions) (runtime.Object, error) {
return c.Secrets(ns).List(opts)
}
}
func secretsWatchFunc(c *client.Client, ns string) func(options api.ListOptions) (watch.Interface, error) {
return func(options api.ListOptions) (watch.Interface, error) {
return c.Secrets(ns).Watch(options)
}
}
func mapListFunc(c *client.Client, ns string) func(api.ListOptions) (runtime.Object, error) {
return func(opts api.ListOptions) (runtime.Object, error) {
return c.ConfigMaps(ns).List(opts)
}
}
func mapWatchFunc(c *client.Client, ns string) func(options api.ListOptions) (watch.Interface, error) {
return func(options api.ListOptions) (watch.Interface, error) {
return c.ConfigMaps(ns).Watch(options)
}
}
func (lbc *loadBalancerController) controllersInSync() bool {
return lbc.ingController.HasSynced() &&
lbc.svcController.HasSynced() &&
lbc.endpController.HasSynced() &&
lbc.secrController.HasSynced() &&
lbc.mapController.HasSynced()
}
func (lbc *loadBalancerController) getConfigMap(ns, name string) (*api.ConfigMap, error) {
// TODO: check why lbc.mapLister.Store.GetByKey(mapKey) is not stable (random content)
return lbc.client.ConfigMaps(ns).Get(name)
}
func (lbc *loadBalancerController) getTCPConfigMap(ns, name string) (*api.ConfigMap, error) {
return lbc.getConfigMap(ns, name)
}
func (lbc *loadBalancerController) getUDPConfigMap(ns, name string) (*api.ConfigMap, error) {
return lbc.getConfigMap(ns, name)
}
// checkSvcForUpdate verifies if one of the running pods for a service contains
// named port. If the annotation in the service does not exists or is not equals
// to the port mapping obtained from the pod the service must be updated to reflect
// the current state
func (lbc *loadBalancerController) checkSvcForUpdate(svc *api.Service) (map[string]string, error) {
// get the pods associated with the service
// TODO: switch this to a watch
pods, err := lbc.client.Pods(svc.Namespace).List(api.ListOptions{
LabelSelector: labels.Set(svc.Spec.Selector).AsSelector(),
})
namedPorts := map[string]string{}
if err != nil {
return namedPorts, fmt.Errorf("error searching service pods %v/%v: %v", svc.Namespace, svc.Name, err)
}
if len(pods.Items) == 0 {
return namedPorts, nil
}
// we need to check only one pod searching for named ports
pod := &pods.Items[0]
glog.V(4).Infof("checking pod %v/%v for named port information", pod.Namespace, pod.Name)
for i := range svc.Spec.Ports {
servicePort := &svc.Spec.Ports[i]
_, err := strconv.Atoi(servicePort.TargetPort.StrVal)
if err != nil {
portNum, err := podutil.FindPort(pod, servicePort)
if err != nil {
glog.V(4).Infof("failed to find port for service %s/%s: %v", svc.Namespace, svc.Name, err)
continue
}
if servicePort.TargetPort.StrVal == "" {
continue
}
namedPorts[servicePort.TargetPort.StrVal] = fmt.Sprintf("%v", portNum)
}
}
if svc.ObjectMeta.Annotations == nil {
svc.ObjectMeta.Annotations = map[string]string{}
}
curNamedPort := svc.ObjectMeta.Annotations[namedPortAnnotation]
if len(namedPorts) > 0 && !reflect.DeepEqual(curNamedPort, namedPorts) {
data, _ := json.Marshal(namedPorts)
newSvc, err := lbc.client.Services(svc.Namespace).Get(svc.Name)
if err != nil {
return namedPorts, fmt.Errorf("error getting service %v/%v: %v", svc.Namespace, svc.Name, err)
}
if newSvc.ObjectMeta.Annotations == nil {
newSvc.ObjectMeta.Annotations = map[string]string{}
}
newSvc.ObjectMeta.Annotations[namedPortAnnotation] = string(data)
glog.Infof("updating service %v with new named port mappings", svc.Name)
_, err = lbc.client.Services(svc.Namespace).Update(newSvc)
if err != nil {
return namedPorts, fmt.Errorf("error syncing service %v/%v: %v", svc.Namespace, svc.Name, err)
}
return newSvc.ObjectMeta.Annotations, nil
}
return namedPorts, nil
}
func (lbc *loadBalancerController) sync(key string) error {
if !lbc.controllersInSync() {
time.Sleep(podStoreSyncedPollPeriod)
return fmt.Errorf("deferring sync till endpoints controller has synced")
}
// by default no custom configuration configmap
cfg := &api.ConfigMap{}
if lbc.nxgConfigMap != "" {
// Search for custom configmap (defined in main args)
var err error
ns, name, _ := parseNsName(lbc.nxgConfigMap)
cfg, err = lbc.getConfigMap(ns, name)
if err != nil {
return fmt.Errorf("unexpected error searching configmap %v: %v", lbc.nxgConfigMap, err)
}
}
ngxConfig := lbc.nginx.ReadConfig(cfg)
ngxConfig.HealthzURL = lbc.defHealthzURL
ings := lbc.ingLister.Store.List()
upstreams, servers := lbc.getUpstreamServers(ngxConfig, ings)
return lbc.nginx.CheckAndReload(ngxConfig, ingress.Configuration{
Upstreams: upstreams,
Servers: servers,
TCPUpstreams: lbc.getTCPServices(),
UDPUpstreams: lbc.getUDPServices(),
})
}
func (lbc *loadBalancerController) updateIngressStatus(key string) error {
if !lbc.controllersInSync() {
time.Sleep(podStoreSyncedPollPeriod)
return fmt.Errorf("deferring sync till endpoints controller has synced")
}
obj, ingExists, err := lbc.ingLister.Store.GetByKey(key)
if err != nil {
return err
}
if !ingExists {
// TODO: what's the correct behavior here?
return nil
}
ing := obj.(*extensions.Ingress)
ingClient := lbc.client.Extensions().Ingress(ing.Namespace)
currIng, err := ingClient.Get(ing.Name)
if err != nil {
return fmt.Errorf("unexpected error searching Ingress %v/%v: %v", ing.Namespace, ing.Name, err)
}
lbIPs := ing.Status.LoadBalancer.Ingress
if !lbc.isStatusIPDefined(lbIPs) {
glog.Infof("Updating loadbalancer %v/%v with IP %v", ing.Namespace, ing.Name, lbc.podInfo.NodeIP)
currIng.Status.LoadBalancer.Ingress = append(currIng.Status.LoadBalancer.Ingress, api.LoadBalancerIngress{
IP: lbc.podInfo.NodeIP,
})
if _, err := ingClient.UpdateStatus(currIng); err != nil {
lbc.recorder.Eventf(currIng, api.EventTypeWarning, "UPDATE", "error: %v", err)
return err
}
lbc.recorder.Eventf(currIng, api.EventTypeNormal, "CREATE", "ip: %v", lbc.podInfo.NodeIP)
}
return nil
}
func (lbc *loadBalancerController) isStatusIPDefined(lbings []api.LoadBalancerIngress) bool {
for _, lbing := range lbings {
if lbing.IP == lbc.podInfo.NodeIP {
return true
}
}
return false
}
func (lbc *loadBalancerController) getTCPServices() []*ingress.Location {
if lbc.tcpConfigMap == "" {
// no configmap for TCP services
return []*ingress.Location{}
}
ns, name, err := parseNsName(lbc.tcpConfigMap)
if err != nil {
glog.Warningf("%v", err)
return []*ingress.Location{}
}
tcpMap, err := lbc.getTCPConfigMap(ns, name)
if err != nil {
glog.V(3).Infof("no configured tcp services found: %v", err)
return []*ingress.Location{}
}
return lbc.getStreamServices(tcpMap.Data, api.ProtocolTCP)
}
func (lbc *loadBalancerController) getUDPServices() []*ingress.Location {
if lbc.udpConfigMap == "" {
// no configmap for TCP services
return []*ingress.Location{}
}
ns, name, err := parseNsName(lbc.udpConfigMap)
if err != nil {
glog.Warningf("%v", err)
return []*ingress.Location{}
}
tcpMap, err := lbc.getUDPConfigMap(ns, name)
if err != nil {
glog.V(3).Infof("no configured tcp services found: %v", err)
return []*ingress.Location{}
}
return lbc.getStreamServices(tcpMap.Data, api.ProtocolUDP)
}
func (lbc *loadBalancerController) getStreamServices(data map[string]string, proto api.Protocol) []*ingress.Location {
var svcs []*ingress.Location
// k -> port to expose in nginx
// v -> <namespace>/<service name>:<port from service to be used>
for k, v := range data {
port, err := strconv.Atoi(k)
if err != nil {
glog.Warningf("%v is not valid as a TCP port", k)
continue
}
// this ports are required for NGINX
if k == "80" || k == "443" || k == "8181" {
glog.Warningf("port %v cannot be used for TCP or UDP services. Is reserved for NGINX", k)
continue
}
nsSvcPort := strings.Split(v, ":")
if len(nsSvcPort) != 2 {
glog.Warningf("invalid format (namespace/name:port) '%v'", k)
continue
}
nsName := nsSvcPort[0]
svcPort := nsSvcPort[1]
svcNs, svcName, err := parseNsName(nsName)
if err != nil {
glog.Warningf("%v", err)
continue
}
svcObj, svcExists, err := lbc.svcLister.Store.GetByKey(nsName)
if err != nil {
glog.Warningf("error getting service %v: %v", nsName, err)
continue
}
if !svcExists {
glog.Warningf("service %v was not found", nsName)
continue
}
svc := svcObj.(*api.Service)
var endps []ingress.UpstreamServer
targetPort, err := strconv.Atoi(svcPort)
if err != nil {
for _, sp := range svc.Spec.Ports {
if sp.Name == svcPort {
endps = lbc.getEndpoints(svc, sp.TargetPort, proto, &healthcheck.Upstream{})
break
}
}
} else {
// we need to use the TargetPort (where the endpoints are running)
for _, sp := range svc.Spec.Ports {
if sp.Port == int32(targetPort) {
endps = lbc.getEndpoints(svc, sp.TargetPort, proto, &healthcheck.Upstream{})
break
}
}
}
// tcp upstreams cannot contain empty upstreams and there is no
// default backend equivalent for TCP
if len(endps) == 0 {
glog.Warningf("service %v/%v does not have any active endpoints", svcNs, svcName)
continue
}
svcs = append(svcs, &ingress.Location{
Path: k,
Upstream: ingress.Upstream{
Name: fmt.Sprintf("%v-%v-%v", svcNs, svcName, port),
Backends: endps,
},
})
}
return svcs
}
// getDefaultUpstream returns an NGINX upstream associated with the
// default backend service. In case of error retrieving information
// configure the upstream to return http code 503.
func (lbc *loadBalancerController) getDefaultUpstream() *ingress.Upstream {
upstream := &ingress.Upstream{
Name: defUpstreamName,
}
svcKey := lbc.defaultSvc
svcObj, svcExists, err := lbc.svcLister.Store.GetByKey(svcKey)
if err != nil {
glog.Warningf("unexpected error searching the default backend %v: %v", lbc.defaultSvc, err)
upstream.Backends = append(upstream.Backends, nginx.NewDefaultServer())
return upstream
}
if !svcExists {
glog.Warningf("service %v does not exists", svcKey)
upstream.Backends = append(upstream.Backends, nginx.NewDefaultServer())
return upstream
}
svc := svcObj.(*api.Service)
endps := lbc.getEndpoints(svc, svc.Spec.Ports[0].TargetPort, api.ProtocolTCP, &healthcheck.Upstream{})
if len(endps) == 0 {
glog.Warningf("service %v does not have any active endpoints", svcKey)
endps = []ingress.UpstreamServer{nginx.NewDefaultServer()}
} else {
upstream.Backends = append(upstream.Backends, endps...)
}
return upstream
}
// getUpstreamServers returns a list of Upstream and Server to be used in NGINX.
// An upstream can be used in multiple servers if the namespace, service name and port are the same
func (lbc *loadBalancerController) getUpstreamServers(ngxCfg config.Configuration, data []interface{}) ([]*ingress.Upstream, []*ingress.Server) {
upstreams := lbc.createUpstreams(ngxCfg, data)
servers := lbc.createServers(data, upstreams)
for _, ingIf := range data {
ing := ingIf.(*extensions.Ingress)
nginxAuth, err := auth.ParseAnnotations(lbc.client, ing, auth.DefAuthDirectory)
glog.V(3).Infof("nginx auth %v", nginxAuth)
if err != nil {
glog.V(3).Infof("error reading authentication in Ingress %v/%v: %v", ing.GetNamespace(), ing.GetName(), err)
}
rl, err := ratelimit.ParseAnnotations(ing)
glog.V(3).Infof("nginx rate limit %v", rl)
if err != nil {
glog.V(3).Infof("error reading rate limit annotation in Ingress %v/%v: %v", ing.GetNamespace(), ing.GetName(), err)
}
secUpstream, err := secureupstream.ParseAnnotations(ing)
if err != nil {
glog.V(3).Infof("error reading secure upstream in Ingress %v/%v: %v", ing.GetNamespace(), ing.GetName(), err)
}
locRew, err := rewrite.ParseAnnotations(ngxCfg, ing)
if err != nil {
glog.V(3).Infof("error parsing rewrite annotations for Ingress rule %v/%v: %v", ing.GetNamespace(), ing.GetName(), err)
}
wl, err := ipwhitelist.ParseAnnotations(ngxCfg.WhitelistSourceRange, ing)
glog.V(3).Infof("nginx white list %v", wl)
if err != nil {
glog.V(3).Infof("error reading white list annotation in Ingress %v/%v: %v", ing.GetNamespace(), ing.GetName(), err)
}
eCORS, err := cors.ParseAnnotations(ing)
if err != nil {
glog.V(3).Infof("error reading CORS annotation in Ingress %v/%v: %v", ing.GetNamespace(), ing.GetName(), err)
}
ra, err := authreq.ParseAnnotations(ing)
glog.V(3).Infof("nginx auth request %v", ra)
if err != nil {
glog.V(3).Infof("error reading auth request annotation in Ingress %v/%v: %v", ing.GetNamespace(), ing.GetName(), err)
}
for _, rule := range ing.Spec.Rules {
host := rule.Host
if host == "" {
host = defServerName
}
server := servers[host]
if server == nil {
server = servers[defServerName]
}
if rule.HTTP == nil && host != defServerName {
// no rules, host is not default server.
// check if Ingress rules contains Backend and replace default backend
defBackend := fmt.Sprintf("default-backend-%v-%v-%v", ing.GetNamespace(), ing.Spec.Backend.ServiceName, ing.Spec.Backend.ServicePort.String())
ups := upstreams[defBackend]
for _, loc := range server.Locations {
loc.Upstream = *ups
}
continue
}
for _, path := range rule.HTTP.Paths {
upsName := fmt.Sprintf("%v-%v-%v", ing.GetNamespace(), path.Backend.ServiceName, path.Backend.ServicePort.String())
ups := upstreams[upsName]
// we need to check if the upstream contains the default backend
if isDefaultUpstream(ups) && ing.Spec.Backend != nil {
defBackend := fmt.Sprintf("default-backend-%v-%v-%v", ing.GetNamespace(), ing.Spec.Backend.ServiceName, ing.Spec.Backend.ServicePort.String())
if defUps, ok := upstreams[defBackend]; ok {
ups = defUps
}
}
nginxPath := path.Path
// if there's no path defined we assume /
// in NGINX / == /*
if nginxPath == "" {
lbc.recorder.Eventf(ing, api.EventTypeWarning, "MAPPING",
"Ingress rule '%v/%v' contains no path definition. Assuming /",
ing.GetNamespace(), ing.GetName())
nginxPath = rootLocation
}
// Validate that there is no previous rule for the same host and path.
addLoc := true
for _, loc := range server.Locations {
if loc.Path == rootLocation && nginxPath == rootLocation && loc.IsDefBackend {
loc.Upstream = *ups
loc.Auth = *nginxAuth
loc.RateLimit = *rl
loc.Redirect = *locRew
loc.SecureUpstream = secUpstream
loc.Whitelist = *wl
loc.IsDefBackend = false
loc.Upstream = *ups
loc.EnableCORS = eCORS
loc.ExternalAuthURL = ra
addLoc = false
continue
}
if loc.Path == nginxPath {
lbc.recorder.Eventf(ing, api.EventTypeWarning, "MAPPING",
"Path '%v' already defined in another Ingress rule", nginxPath)
addLoc = false
break
}
}
if addLoc {
server.Locations = append(server.Locations, &ingress.Location{
Path: nginxPath,
Upstream: *ups,
Auth: *nginxAuth,
RateLimit: *rl,
Redirect: *locRew,
SecureUpstream: secUpstream,
Whitelist: *wl,
EnableCORS: eCORS,
ExternalAuthURL: ra,
})
}
}
}
}
// TODO: find a way to make this more readable
// The structs must be ordered to always generate the same file
// if the content does not change.
aUpstreams := make([]*ingress.Upstream, 0, len(upstreams))
for _, value := range upstreams {
if len(value.Backends) == 0 {
glog.Warningf("upstream %v does not have any active endpoints. Using default backend", value.Name)
value.Backends = append(value.Backends, nginx.NewDefaultServer())
}
sort.Sort(ingress.UpstreamServerByAddrPort(value.Backends))
aUpstreams = append(aUpstreams, value)
}
sort.Sort(ingress.UpstreamByNameServers(aUpstreams))
aServers := make([]*ingress.Server, 0, len(servers))
for _, value := range servers {
sort.Sort(ingress.LocationByPath(value.Locations))
aServers = append(aServers, value)
}
sort.Sort(ingress.ServerByName(aServers))
return aUpstreams, aServers
}
// createUpstreams creates the NGINX upstreams for each service referenced in
// Ingress rules. The servers inside the upstream are endpoints.
func (lbc *loadBalancerController) createUpstreams(ngxCfg config.Configuration, data []interface{}) map[string]*ingress.Upstream {
upstreams := make(map[string]*ingress.Upstream)
upstreams[defUpstreamName] = lbc.getDefaultUpstream()
for _, ingIf := range data {
ing := ingIf.(*extensions.Ingress)
hz := healthcheck.ParseAnnotations(ngxCfg, ing)
var defBackend string
if ing.Spec.Backend != nil {
defBackend = fmt.Sprintf("default-backend-%v-%v-%v", ing.GetNamespace(), ing.Spec.Backend.ServiceName, ing.Spec.Backend.ServicePort.String())
glog.V(3).Infof("creating upstream %v", defBackend)
upstreams[defBackend] = nginx.NewUpstream(defBackend)
svcKey := fmt.Sprintf("%v/%v", ing.GetNamespace(), ing.Spec.Backend.ServiceName)
endps, err := lbc.getSvcEndpoints(svcKey, ing.Spec.Backend.ServicePort.String(), hz)
upstreams[defBackend].Backends = append(upstreams[defBackend].Backends, endps...)
if err != nil {
glog.Warningf("error creating upstream %v: %v", defBackend, err)
}
}
for _, rule := range ing.Spec.Rules {
if rule.IngressRuleValue.HTTP == nil {
continue
}
for _, path := range rule.HTTP.Paths {
name := fmt.Sprintf("%v-%v-%v", ing.GetNamespace(), path.Backend.ServiceName, path.Backend.ServicePort.String())
if _, ok := upstreams[name]; ok {
continue
}
glog.V(3).Infof("creating upstream %v", name)
upstreams[name] = nginx.NewUpstream(name)
svcKey := fmt.Sprintf("%v/%v", ing.GetNamespace(), path.Backend.ServiceName)
endp, err := lbc.getSvcEndpoints(svcKey, path.Backend.ServicePort.String(), hz)
if err != nil {
glog.Warningf("error obtaining service endpoints: %v", err)
continue
}
upstreams[name].Backends = endp
}
}
}
return upstreams
}
func (lbc *loadBalancerController) getSvcEndpoints(svcKey, backendPort string,
hz *healthcheck.Upstream) ([]ingress.UpstreamServer, error) {
svcObj, svcExists, err := lbc.svcLister.Store.GetByKey(svcKey)
var upstreams []ingress.UpstreamServer
if err != nil {
return upstreams, fmt.Errorf("error getting service %v from the cache: %v", svcKey, err)
}
if !svcExists {
err = fmt.Errorf("service %v does not exists", svcKey)
return upstreams, err
}
svc := svcObj.(*api.Service)
glog.V(3).Infof("obtaining port information for service %v", svcKey)
for _, servicePort := range svc.Spec.Ports {
// targetPort could be a string, use the name or the port (int)
if strconv.Itoa(int(servicePort.Port)) == backendPort ||
servicePort.TargetPort.String() == backendPort ||
servicePort.Name == backendPort {
endps := lbc.getEndpoints(svc, servicePort.TargetPort, api.ProtocolTCP, hz)
if len(endps) == 0 {
glog.Warningf("service %v does not have any active endpoints", svcKey)
}
upstreams = append(upstreams, endps...)
break
}
}
return upstreams, nil
}
func (lbc *loadBalancerController) createServers(data []interface{}, upstreams map[string]*ingress.Upstream) map[string]*ingress.Server {
servers := make(map[string]*ingress.Server)
pems := lbc.getPemsFromIngress(data)
var ngxCert ingress.SSLCert
var err error
if lbc.defSSLCertificate == "" {
// use system certificated generated at image build time
cert, key := getFakeSSLCert()
ngxCert, err = lbc.nginx.AddOrUpdateCertAndKey("system-snake-oil-certificate", cert, key)
} else {
ngxCert, err = lbc.getPemCertificate(lbc.defSSLCertificate)
}
locs := []*ingress.Location{}
locs = append(locs, &ingress.Location{
Path: rootLocation,
IsDefBackend: true,
Upstream: *lbc.getDefaultUpstream(),
})
servers[defServerName] = &ingress.Server{Name: defServerName, Locations: locs}
if err == nil {
pems[defServerName] = ngxCert
servers[defServerName].SSL = true
servers[defServerName].SSLCertificate = ngxCert.PemFileName
servers[defServerName].SSLCertificateKey = ngxCert.PemFileName
servers[defServerName].SSLPemChecksum = ngxCert.PemSHA
} else {
glog.Warningf("unexpected error reading default SSL certificate: %v", err)
}
for _, ingIf := range data {
ing := ingIf.(*extensions.Ingress)
for _, rule := range ing.Spec.Rules {
host := rule.Host
if host == "" {
host = defServerName
}
if _, ok := servers[host]; ok {
glog.V(3).Infof("rule %v/%v uses a host already defined. Skipping server creation", ing.GetNamespace(), ing.GetName())
} else {
locs := []*ingress.Location{}
loc := &ingress.Location{
Path: rootLocation,
IsDefBackend: true,
Upstream: *lbc.getDefaultUpstream(),
}
if ing.Spec.Backend != nil {
defUpstream := fmt.Sprintf("default-backend-%v-%v-%v", ing.GetNamespace(), ing.Spec.Backend.ServiceName, ing.Spec.Backend.ServicePort.String())
if backendUpstream, ok := upstreams[defUpstream]; ok {
if host == "" || host == defServerName {
lbc.recorder.Eventf(ing, api.EventTypeWarning, "MAPPING", "error: rules with Spec.Backend are allowed with hostnames")
} else {
loc.Upstream = *backendUpstream
}
}
}
locs = append(locs, loc)
servers[host] = &ingress.Server{Name: host, Locations: locs}
}
if ngxCert, ok := pems[host]; ok {