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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 controller
import (
"fmt"
"os"
"reflect"
"sort"
"strconv"
"strings"
"sync"
"time"
"github.com/golang/glog"
"k8s.io/apimachinery/pkg/fields"
"k8s.io/apimachinery/pkg/util/intstr"
"k8s.io/apimachinery/pkg/util/runtime"
"k8s.io/apimachinery/pkg/util/wait"
clientset "k8s.io/client-go/kubernetes"
"k8s.io/client-go/kubernetes/scheme"
unversionedcore "k8s.io/client-go/kubernetes/typed/core/v1"
api "k8s.io/client-go/pkg/api/v1"
extensions "k8s.io/client-go/pkg/apis/extensions/v1beta1"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/tools/record"
"k8s.io/client-go/util/flowcontrol"
"k8s.io/ingress/core/pkg/ingress"
"k8s.io/ingress/core/pkg/ingress/annotations/class"
"k8s.io/ingress/core/pkg/ingress/annotations/healthcheck"
"k8s.io/ingress/core/pkg/ingress/annotations/parser"
"k8s.io/ingress/core/pkg/ingress/annotations/proxy"
"k8s.io/ingress/core/pkg/ingress/defaults"
"k8s.io/ingress/core/pkg/ingress/resolver"
"k8s.io/ingress/core/pkg/ingress/status"
"k8s.io/ingress/core/pkg/ingress/status/leaderelection/resourcelock"
"k8s.io/ingress/core/pkg/ingress/store"
"k8s.io/ingress/core/pkg/k8s"
"k8s.io/ingress/core/pkg/net/ssl"
local_strings "k8s.io/ingress/core/pkg/strings"
"k8s.io/ingress/core/pkg/task"
)
const (
defUpstreamName = "upstream-default-backend"
defServerName = "_"
podStoreSyncedPollPeriod = 1 * time.Second
rootLocation = "/"
)
var (
// list of ports that cannot be used by TCP or UDP services
reservedPorts = []string{"80", "443", "8181", "18080"}
)
// GenericController holds the boilerplate code required to build an Ingress controlller.
type GenericController struct {
cfg *Configuration
ingController cache.Controller
endpController cache.Controller
svcController cache.Controller
nodeController cache.Controller
secrController cache.Controller
mapController cache.Controller
ingLister store.IngressLister
svcLister store.ServiceLister
nodeLister store.NodeLister
endpLister store.EndpointLister
secrLister store.SecretLister
mapLister store.ConfigMapLister
annotations annotationExtractor
recorder record.EventRecorder
syncQueue *task.Queue
syncStatus status.Sync
// local store of SSL certificates
// (only certificates used in ingress)
sslCertTracker *sslCertTracker
// store of secret names referenced from Ingress
secretTracker *secretTracker
syncRateLimiter flowcontrol.RateLimiter
// 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
stopCh chan struct{}
}
// Configuration contains all the settings required by an Ingress controller
type Configuration struct {
Client clientset.Interface
ResyncPeriod time.Duration
DefaultService string
IngressClass string
Namespace string
ConfigMapName string
ForceNamespaceIsolation bool
// optional
TCPConfigMapName string
// optional
UDPConfigMapName string
DefaultSSLCertificate string
DefaultHealthzURL string
DefaultIngressClass string
// optional
PublishService string
// Backend is the particular implementation to be used.
// (for instance NGINX)
Backend ingress.Controller
UpdateStatus bool
ElectionID string
}
// newIngressController creates an Ingress controller
func newIngressController(config *Configuration) *GenericController {
eventBroadcaster := record.NewBroadcaster()
eventBroadcaster.StartLogging(glog.Infof)
eventBroadcaster.StartRecordingToSink(&unversionedcore.EventSinkImpl{
Interface: config.Client.Core().Events(config.Namespace),
})
ic := GenericController{
cfg: config,
stopLock: &sync.Mutex{},
stopCh: make(chan struct{}),
syncRateLimiter: flowcontrol.NewTokenBucketRateLimiter(0.5, 1),
recorder: eventBroadcaster.NewRecorder(scheme.Scheme, api.EventSource{
Component: "ingress-controller",
}),
sslCertTracker: newSSLCertTracker(),
secretTracker: newSecretTracker(),
}
ic.syncQueue = task.NewTaskQueue(ic.syncIngress)
// from here to the end of the method all the code is just boilerplate
// required to watch Ingress, Secrets, ConfigMaps and Endoints.
// This is used to detect new content, updates or removals and act accordingly
ingEventHandler := cache.ResourceEventHandlerFuncs{
AddFunc: func(obj interface{}) {
addIng := obj.(*extensions.Ingress)
if !class.IsValid(addIng, ic.cfg.IngressClass, ic.cfg.DefaultIngressClass) {
a, _ := parser.GetStringAnnotation(class.IngressKey, addIng)
glog.Infof("ignoring add for ingress %v based on annotation %v with value %v", addIng.Name, class.IngressKey, a)
return
}
ic.recorder.Eventf(addIng, api.EventTypeNormal, "CREATE", fmt.Sprintf("Ingress %s/%s", addIng.Namespace, addIng.Name))
ic.syncQueue.Enqueue(obj)
ic.extractSecretNames(addIng)
},
DeleteFunc: func(obj interface{}) {
delIng := obj.(*extensions.Ingress)
if !class.IsValid(delIng, ic.cfg.IngressClass, ic.cfg.DefaultIngressClass) {
glog.Infof("ignoring delete for ingress %v based on annotation %v", delIng.Name, class.IngressKey)
return
}
ic.recorder.Eventf(delIng, api.EventTypeNormal, "DELETE", fmt.Sprintf("Ingress %s/%s", delIng.Namespace, delIng.Name))
ic.syncQueue.Enqueue(obj)
},
UpdateFunc: func(old, cur interface{}) {
curIng := cur.(*extensions.Ingress)
if !class.IsValid(curIng, ic.cfg.IngressClass, ic.cfg.DefaultIngressClass) {
return
}
if !reflect.DeepEqual(old, cur) {
upIng := cur.(*extensions.Ingress)
ic.recorder.Eventf(upIng, api.EventTypeNormal, "UPDATE", fmt.Sprintf("Ingress %s/%s", upIng.Namespace, upIng.Name))
ic.syncQueue.Enqueue(cur)
ic.extractSecretNames(upIng)
}
},
}
secrEventHandler := cache.ResourceEventHandlerFuncs{
UpdateFunc: func(old, cur interface{}) {
if !reflect.DeepEqual(old, cur) {
ic.syncSecret()
}
},
DeleteFunc: func(obj interface{}) {
sec := obj.(*api.Secret)
key := fmt.Sprintf("%v/%v", sec.Namespace, sec.Name)
ic.sslCertTracker.Delete(key)
ic.secretTracker.Delete(key)
},
}
eventHandler := cache.ResourceEventHandlerFuncs{
AddFunc: func(obj interface{}) {
ep := obj.(*api.Endpoints)
_, found := ep.Annotations[resourcelock.LeaderElectionRecordAnnotationKey]
if found {
return
}
ic.syncQueue.Enqueue(obj)
},
DeleteFunc: func(obj interface{}) {
ic.syncQueue.Enqueue(obj)
},
UpdateFunc: func(old, cur interface{}) {
if !reflect.DeepEqual(old, cur) {
ep := cur.(*api.Endpoints)
_, found := ep.Annotations[resourcelock.LeaderElectionRecordAnnotationKey]
if found {
return
}
ic.syncQueue.Enqueue(cur)
}
},
}
mapEventHandler := cache.ResourceEventHandlerFuncs{
AddFunc: func(obj interface{}) {
upCmap := obj.(*api.ConfigMap)
mapKey := fmt.Sprintf("%s/%s", upCmap.Namespace, upCmap.Name)
if mapKey == ic.cfg.ConfigMapName {
glog.V(2).Infof("adding configmap %v to backend", mapKey)
ic.cfg.Backend.SetConfig(upCmap)
}
},
UpdateFunc: func(old, cur interface{}) {
if !reflect.DeepEqual(old, cur) {
upCmap := cur.(*api.ConfigMap)
mapKey := fmt.Sprintf("%s/%s", upCmap.Namespace, upCmap.Name)
if mapKey == ic.cfg.ConfigMapName {
glog.V(2).Infof("updating configmap backend (%v)", mapKey)
ic.cfg.Backend.SetConfig(upCmap)
}
// updates to configuration configmaps can trigger an update
if mapKey == ic.cfg.ConfigMapName || mapKey == ic.cfg.TCPConfigMapName || mapKey == ic.cfg.UDPConfigMapName {
ic.recorder.Eventf(upCmap, api.EventTypeNormal, "UPDATE", fmt.Sprintf("ConfigMap %v", mapKey))
ic.syncQueue.Enqueue(cur)
}
}
},
}
watchNs := api.NamespaceAll
if ic.cfg.ForceNamespaceIsolation && ic.cfg.Namespace != api.NamespaceAll {
watchNs = ic.cfg.Namespace
}
ic.ingLister.Store, ic.ingController = cache.NewInformer(
cache.NewListWatchFromClient(ic.cfg.Client.Extensions().RESTClient(), "ingresses", ic.cfg.Namespace, fields.Everything()),
&extensions.Ingress{}, ic.cfg.ResyncPeriod, ingEventHandler)
ic.endpLister.Store, ic.endpController = cache.NewInformer(
cache.NewListWatchFromClient(ic.cfg.Client.Core().RESTClient(), "endpoints", ic.cfg.Namespace, fields.Everything()),
&api.Endpoints{}, ic.cfg.ResyncPeriod, eventHandler)
ic.secrLister.Store, ic.secrController = cache.NewInformer(
cache.NewListWatchFromClient(ic.cfg.Client.Core().RESTClient(), "secrets", watchNs, fields.Everything()),
&api.Secret{}, ic.cfg.ResyncPeriod, secrEventHandler)
ic.mapLister.Store, ic.mapController = cache.NewInformer(
cache.NewListWatchFromClient(ic.cfg.Client.Core().RESTClient(), "configmaps", watchNs, fields.Everything()),
&api.ConfigMap{}, ic.cfg.ResyncPeriod, mapEventHandler)
ic.svcLister.Store, ic.svcController = cache.NewInformer(
cache.NewListWatchFromClient(ic.cfg.Client.Core().RESTClient(), "services", ic.cfg.Namespace, fields.Everything()),
&api.Service{}, ic.cfg.ResyncPeriod, cache.ResourceEventHandlerFuncs{})
ic.nodeLister.Store, ic.nodeController = cache.NewInformer(
cache.NewListWatchFromClient(ic.cfg.Client.Core().RESTClient(), "nodes", api.NamespaceAll, fields.Everything()),
&api.Node{}, ic.cfg.ResyncPeriod, cache.ResourceEventHandlerFuncs{})
if config.UpdateStatus {
ic.syncStatus = status.NewStatusSyncer(status.Config{
Client: config.Client,
PublishService: ic.cfg.PublishService,
IngressLister: ic.ingLister,
ElectionID: config.ElectionID,
IngressClass: config.IngressClass,
DefaultIngressClass: config.DefaultIngressClass,
})
} else {
glog.Warning("Update of ingress status is disabled (flag --update-status=false was specified)")
}
ic.annotations = newAnnotationExtractor(ic)
ic.cfg.Backend.SetListers(ingress.StoreLister{
Ingress: ic.ingLister,
Service: ic.svcLister,
Node: ic.nodeLister,
Endpoint: ic.endpLister,
Secret: ic.secrLister,
ConfigMap: ic.mapLister,
})
return &ic
}
// Info returns information about the backend
func (ic GenericController) Info() *ingress.BackendInfo {
return ic.cfg.Backend.Info()
}
// IngressClass returns information about the backend
func (ic GenericController) IngressClass() string {
return ic.cfg.IngressClass
}
// GetDefaultBackend returns the default backend
func (ic GenericController) GetDefaultBackend() defaults.Backend {
return ic.cfg.Backend.BackendDefaults()
}
// GetSecret searches for a secret in the local secrets Store
func (ic GenericController) GetSecret(name string) (*api.Secret, error) {
s, exists, err := ic.secrLister.Store.GetByKey(name)
if err != nil {
return nil, err
}
if !exists {
return nil, fmt.Errorf("secret %v was not found", name)
}
return s.(*api.Secret), nil
}
func (ic *GenericController) getConfigMap(ns, name string) (*api.ConfigMap, error) {
s, exists, err := ic.mapLister.Store.GetByKey(fmt.Sprintf("%v/%v", ns, name))
if err != nil {
return nil, err
}
if !exists {
return nil, fmt.Errorf("configmap %v was not found", name)
}
return s.(*api.ConfigMap), nil
}
// sync collects all the pieces required to assemble the configuration file and
// then sends the content to the backend (OnUpdate) receiving the populated
// template as response reloading the backend if is required.
func (ic *GenericController) syncIngress(key interface{}) error {
ic.syncRateLimiter.Accept()
if ic.syncQueue.IsShuttingDown() {
return nil
}
upstreams, servers := ic.getBackendServers()
var passUpstreams []*ingress.SSLPassthroughBackend
for _, server := range servers {
if !server.SSLPassthrough {
continue
}
for _, loc := range server.Locations {
if loc.Path != rootLocation {
glog.Warningf("ignoring path %v of ssl passthrough host %v", loc.Path, server.Hostname)
continue
}
passUpstreams = append(passUpstreams, &ingress.SSLPassthroughBackend{
Backend: loc.Backend,
Hostname: server.Hostname,
Service: loc.Service,
Port: loc.Port,
})
break
}
}
data, err := ic.cfg.Backend.OnUpdate(ingress.Configuration{
Backends: upstreams,
Servers: servers,
TCPEndpoints: ic.getStreamServices(ic.cfg.TCPConfigMapName, api.ProtocolTCP),
UDPEndpoints: ic.getStreamServices(ic.cfg.UDPConfigMapName, api.ProtocolUDP),
PassthroughBackends: passUpstreams,
})
if err != nil {
return err
}
out, reloaded, err := ic.cfg.Backend.Reload(data)
if err != nil {
incReloadErrorCount()
glog.Errorf("unexpected failure restarting the backend: \n%v", string(out))
return err
}
if reloaded {
glog.Infof("ingress backend successfully reloaded...")
incReloadCount()
}
return nil
}
func (ic *GenericController) getStreamServices(configmapName string, proto api.Protocol) []ingress.L4Service {
glog.V(3).Infof("obtaining information about stream services of type %v located in configmap %v", proto, configmapName)
if configmapName == "" {
// no configmap configured
return []ingress.L4Service{}
}
ns, name, err := k8s.ParseNameNS(configmapName)
if err != nil {
glog.Errorf("unexpected error reading configmap %v: %v", name, err)
return []ingress.L4Service{}
}
configmap, err := ic.getConfigMap(ns, name)
if err != nil {
glog.Errorf("unexpected error reading configmap %v: %v", name, err)
return []ingress.L4Service{}
}
var svcs []ingress.L4Service
// k -> port to expose
// v -> <namespace>/<service name>:<port from service to be used>
for k, v := range configmap.Data {
externalPort, err := strconv.Atoi(k)
if err != nil {
glog.Warningf("%v is not valid as a TCP/UDP port", k)
continue
}
// this ports used by the backend
if local_strings.StringInSlice(k, reservedPorts) {
glog.Warningf("port %v cannot be used for TCP or UDP services. It is reserved for the Ingress controller", 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 := k8s.ParseNameNS(nsName)
if err != nil {
glog.Warningf("%v", err)
continue
}
svcObj, svcExists, err := ic.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.Endpoint
targetPort, err := strconv.Atoi(svcPort)
if err != nil {
glog.V(3).Infof("searching service %v/%v endpoints using the name '%v'", svcNs, svcName, svcPort)
for _, sp := range svc.Spec.Ports {
if sp.Name == svcPort {
endps = ic.getEndpoints(svc, sp.TargetPort, proto, &healthcheck.Upstream{})
break
}
}
} else {
// we need to use the TargetPort (where the endpoints are running)
glog.V(3).Infof("searching service %v/%v endpoints using the target port '%v'", svcNs, svcName, targetPort)
for _, sp := range svc.Spec.Ports {
if sp.Port == int32(targetPort) {
endps = ic.getEndpoints(svc, sp.TargetPort, proto, &healthcheck.Upstream{})
break
}
}
}
// stream services cannot contain empty upstreams and there is no
// default backend equivalent
if len(endps) == 0 {
glog.Warningf("service %v/%v does not have any active endpoints for port %v and protocol %v", svcNs, svcName, svcPort, proto)
continue
}
svcs = append(svcs, ingress.L4Service{
Port: externalPort,
Backend: ingress.L4Backend{
Name: svcName,
Namespace: svcNs,
Port: intstr.FromString(svcPort),
Protocol: proto,
},
Endpoints: endps,
})
}
return svcs
}
// getDefaultUpstream returns an upstream associated with the
// default backend service. In case of error retrieving information
// configure the upstream to return http code 503.
func (ic *GenericController) getDefaultUpstream() *ingress.Backend {
upstream := &ingress.Backend{
Name: defUpstreamName,
}
svcKey := ic.cfg.DefaultService
svcObj, svcExists, err := ic.svcLister.Store.GetByKey(svcKey)
if err != nil {
glog.Warningf("unexpected error searching the default backend %v: %v", ic.cfg.DefaultService, err)
upstream.Endpoints = append(upstream.Endpoints, newDefaultServer())
return upstream
}
if !svcExists {
glog.Warningf("service %v does not exist", svcKey)
upstream.Endpoints = append(upstream.Endpoints, newDefaultServer())
return upstream
}
svc := svcObj.(*api.Service)
endps := ic.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.Endpoint{newDefaultServer()}
}
upstream.Endpoints = append(upstream.Endpoints, endps...)
return upstream
}
type ingressByRevision []interface{}
func (c ingressByRevision) Len() int { return len(c) }
func (c ingressByRevision) Swap(i, j int) { c[i], c[j] = c[j], c[i] }
func (c ingressByRevision) Less(i, j int) bool {
ir := c[i].(*extensions.Ingress).ResourceVersion
jr := c[j].(*extensions.Ingress).ResourceVersion
return ir < jr
}
// getBackendServers returns a list of Upstream and Server to be used by the backend
// An upstream can be used in multiple servers if the namespace, service name and port are the same
func (ic *GenericController) getBackendServers() ([]*ingress.Backend, []*ingress.Server) {
ings := ic.ingLister.Store.List()
sort.Sort(ingressByRevision(ings))
upstreams := ic.createUpstreams(ings)
servers := ic.createServers(ings, upstreams)
for _, ingIf := range ings {
ing := ingIf.(*extensions.Ingress)
if !class.IsValid(ing, ic.cfg.IngressClass, ic.cfg.DefaultIngressClass) {
continue
}
anns := ic.annotations.Extract(ing)
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 {
glog.V(3).Infof("ingress rule %v/%v does not contain HTTP rules, using default backend", ing.Namespace, ing.Name)
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]
// if there's no path defined we assume /
nginxPath := rootLocation
if path.Path != "" {
nginxPath = path.Path
}
addLoc := true
for _, loc := range server.Locations {
if loc.Path == nginxPath {
addLoc = false
if !loc.IsDefBackend {
glog.V(3).Infof("avoiding replacement of ingress rule %v/%v location %v upstream %v (%v)", ing.Namespace, ing.Name, loc.Path, ups.Name, loc.Backend)
break
}
glog.V(3).Infof("replacing ingress rule %v/%v location %v upstream %v (%v)", ing.Namespace, ing.Name, loc.Path, ups.Name, loc.Backend)
loc.Backend = ups.Name
loc.IsDefBackend = false
loc.Backend = ups.Name
loc.Port = ups.Port
loc.Service = ups.Service
mergeLocationAnnotations(loc, anns)
break
}
}
// is a new location
if addLoc {
glog.V(3).Infof("adding location %v in ingress rule %v/%v upstream %v", nginxPath, ing.Namespace, ing.Name, ups.Name)
loc := &ingress.Location{
Path: nginxPath,
Backend: ups.Name,
IsDefBackend: false,
Service: ups.Service,
Port: ups.Port,
}
mergeLocationAnnotations(loc, anns)
server.Locations = append(server.Locations, loc)
}
}
}
}
// Configure Backends[].SSLPassthrough
for _, upstream := range upstreams {
isHTTPSfrom := []*ingress.Server{}
for _, server := range servers {
for _, location := range server.Locations {
if upstream.Name == location.Backend {
if server.SSLPassthrough {
if location.Path == rootLocation {
if location.Backend == defUpstreamName {
glog.Warningf("ignoring ssl passthrough of %v as it doesn't have a default backend (root context)", server.Hostname)
continue
}
isHTTPSfrom = append(isHTTPSfrom, server)
}
continue
}
}
}
}
if len(isHTTPSfrom) > 0 {
upstream.SSLPassthrough = true
}
}
// 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.Backend, 0, len(upstreams))
for _, value := range upstreams {
if len(value.Endpoints) == 0 {
glog.V(3).Infof("upstream %v does not have any active endpoints. Using default backend", value.Name)
value.Endpoints = append(value.Endpoints, newDefaultServer())
}
aUpstreams = append(aUpstreams, value)
}
sort.Sort(ingress.BackendByNameServers(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
}
// GetAuthCertificate ...
func (ic GenericController) GetAuthCertificate(secretName string) (*resolver.AuthSSLCert, error) {
_, err := ic.GetSecret(secretName)
if err != nil {
return &resolver.AuthSSLCert{}, fmt.Errorf("unexpected error: %v", err)
}
bc, exists := ic.sslCertTracker.Get(secretName)
if !exists {
return &resolver.AuthSSLCert{}, fmt.Errorf("secret %v does not exist", secretName)
}
cert := bc.(*ingress.SSLCert)
return &resolver.AuthSSLCert{
Secret: secretName,
CAFileName: cert.CAFileName,
PemSHA: cert.PemSHA,
}, nil
}
// createUpstreams creates the NGINX upstreams for each service referenced in
// Ingress rules. The servers inside the upstream are endpoints.
func (ic *GenericController) createUpstreams(data []interface{}) map[string]*ingress.Backend {
upstreams := make(map[string]*ingress.Backend)
upstreams[defUpstreamName] = ic.getDefaultUpstream()
for _, ingIf := range data {
ing := ingIf.(*extensions.Ingress)
if !class.IsValid(ing, ic.cfg.IngressClass, ic.cfg.DefaultIngressClass) {
continue
}
secUpstream := ic.annotations.SecureUpstream(ing)
hz := ic.annotations.HealthCheck(ing)
affinity := ic.annotations.SessionAffinity(ing)
var defBackend string
if ing.Spec.Backend != nil {
defBackend = fmt.Sprintf("%v-%v-%v",
ing.GetNamespace(),
ing.Spec.Backend.ServiceName,
ing.Spec.Backend.ServicePort.String())
glog.V(3).Infof("creating upstream %v", defBackend)
upstreams[defBackend] = newUpstream(defBackend)
svcKey := fmt.Sprintf("%v/%v", ing.GetNamespace(), ing.Spec.Backend.ServiceName)
endps, err := ic.serviceEndpoints(svcKey, ing.Spec.Backend.ServicePort.String(), hz)
upstreams[defBackend].Endpoints = append(upstreams[defBackend].Endpoints, endps...)
if err != nil {
glog.Warningf("error creating upstream %v: %v", defBackend, err)
}
}
for _, rule := range ing.Spec.Rules {
if rule.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] = newUpstream(name)
if !upstreams[name].Secure {
upstreams[name].Secure = secUpstream.Secure
}
if upstreams[name].SecureCACert.Secret == "" {
upstreams[name].SecureCACert = secUpstream.CACert
}
if upstreams[name].SessionAffinity.AffinityType == "" {
upstreams[name].SessionAffinity.AffinityType = affinity.AffinityType
if affinity.AffinityType == "cookie" {
upstreams[name].SessionAffinity.CookieSessionAffinity.Name = affinity.CookieConfig.Name
upstreams[name].SessionAffinity.CookieSessionAffinity.Hash = affinity.CookieConfig.Hash
}
}
svcKey := fmt.Sprintf("%v/%v", ing.GetNamespace(), path.Backend.ServiceName)
endp, err := ic.serviceEndpoints(svcKey, path.Backend.ServicePort.String(), hz)
if err != nil {
glog.Warningf("error obtaining service endpoints: %v", err)
continue
}
upstreams[name].Endpoints = endp
s, exists, err := ic.svcLister.Store.GetByKey(svcKey)
if err != nil {
glog.Warningf("error obtaining service: %v", err)
continue
}
if exists {
upstreams[name].Service = s.(*api.Service)
} else {
glog.Warningf("service %v does not exists", svcKey)
}
upstreams[name].Port = path.Backend.ServicePort
}
}
}
return upstreams
}
// serviceEndpoints returns the upstream servers (endpoints) associated
// to a service.
func (ic *GenericController) serviceEndpoints(svcKey, backendPort string,
hz *healthcheck.Upstream) ([]ingress.Endpoint, error) {
svcObj, svcExists, err := ic.svcLister.Store.GetByKey(svcKey)
var upstreams []ingress.Endpoint
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 exist", 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 := ic.getEndpoints(svc, servicePort.TargetPort, api.ProtocolTCP, hz)
if len(endps) == 0 {
glog.Warningf("service %v does not have any active endpoints", svcKey)
}
sort.Sort(ingress.EndpointByAddrPort(endps))
upstreams = append(upstreams, endps...)
break
}
}
return upstreams, nil
}
// createServers initializes a map that contains information about the list of
// FDQN referenced by ingress rules and the common name field in the referenced
// SSL certificates. Each server is configured with location / using a default
// backend specified by the user or the one inside the ingress spec.
func (ic *GenericController) createServers(data []interface{},
upstreams map[string]*ingress.Backend) map[string]*ingress.Server {
servers := make(map[string]*ingress.Server)
bdef := ic.GetDefaultBackend()
ngxProxy := proxy.Configuration{
BodySize: bdef.ProxyBodySize,
ConnectTimeout: bdef.ProxyConnectTimeout,
SendTimeout: bdef.ProxySendTimeout,
ReadTimeout: bdef.ProxyReadTimeout,
BufferSize: bdef.ProxyBufferSize,
CookieDomain: bdef.ProxyCookieDomain,
CookiePath: bdef.ProxyCookiePath,
}
// This adds the Default Certificate to Default Backend (or generates a new self signed one)
var defaultPemFileName, defaultPemSHA string
// Tries to fetch the default Certificate. If it does not exists, generate a new self signed one.
defaultCertificate, err := ic.getPemCertificate(ic.cfg.DefaultSSLCertificate)
if err != nil {
// This means the Default Secret does not exists, so we will create a new one.
fakeCertificate := "default-fake-certificate"
fakeCertificatePath := fmt.Sprintf("%v/%v.pem", ingress.DefaultSSLDirectory, fakeCertificate)
// Only generates a new certificate if it doesn't exists physically
_, err := os.Stat(fakeCertificatePath)
if err != nil {
glog.V(3).Infof("No Default SSL Certificate found. Generating a new one")
defCert, defKey := ssl.GetFakeSSLCert()
defaultCertificate, err = ssl.AddOrUpdateCertAndKey(fakeCertificate, defCert, defKey, []byte{})
if err != nil {
glog.Fatalf("Error generating self signed certificate: %v", err)
}
defaultPemFileName = defaultCertificate.PemFileName
defaultPemSHA = defaultCertificate.PemSHA
} else {
defaultPemFileName = fakeCertificatePath
defaultPemSHA = ssl.PemSHA1(fakeCertificatePath)
}
} else {
defaultPemFileName = defaultCertificate.PemFileName
defaultPemSHA = defaultCertificate.PemSHA
}
// initialize the default server
servers[defServerName] = &ingress.Server{
Hostname: defServerName,
SSLCertificate: defaultPemFileName,
SSLPemChecksum: defaultPemSHA,
Locations: []*ingress.Location{
{
Path: rootLocation,
IsDefBackend: true,
Backend: ic.getDefaultUpstream().Name,
Proxy: ngxProxy,
},
}}
// initialize all the servers
for _, ingIf := range data {
ing := ingIf.(*extensions.Ingress)
if !class.IsValid(ing, ic.cfg.IngressClass, ic.cfg.DefaultIngressClass) {
continue
}
// check if ssl passthrough is configured
sslpt := ic.annotations.SSLPassthrough(ing)
dun := ic.getDefaultUpstream().Name
if ing.Spec.Backend != nil {
// replace default backend
defUpstream := fmt.Sprintf("%v-%v-%v", ing.GetNamespace(), ing.Spec.Backend.ServiceName, ing.Spec.Backend.ServicePort.String())
if backendUpstream, ok := upstreams[defUpstream]; ok {
dun = backendUpstream.Name
}
}
for _, rule := range ing.Spec.Rules {
host := rule.Host
if host == "" {
host = defServerName
}
if _, ok := servers[host]; ok {
// server already configured
continue
}
servers[host] = &ingress.Server{
Hostname: host,
Locations: []*ingress.Location{
{
Path: rootLocation,
IsDefBackend: true,
Backend: dun,
Proxy: ngxProxy,
},
}, SSLPassthrough: sslpt}
}
}
// configure default location and SSL
for _, ingIf := range data {
ing := ingIf.(*extensions.Ingress)
if !class.IsValid(ing, ic.cfg.IngressClass, ic.cfg.DefaultIngressClass) {
continue
}
for _, rule := range ing.Spec.Rules {
host := rule.Host
if host == "" {
host = defServerName
}
// only add a certificate if the server does not have one previously configured
// TODO: TLS without secret?
if len(ing.Spec.TLS) > 0 && servers[host].SSLCertificate == "" {
tlsSecretName := ""
found := false
for _, tls := range ing.Spec.TLS {
for _, tlsHost := range tls.Hosts {
if tlsHost == host {
tlsSecretName = tls.SecretName
found = true
break
}
}
}
// the current ing.Spec.Rules[].Host doesn't have an entry at
// ing.Spec.TLS[].Hosts[], skipping to the next Rule
if !found {
continue
}
// Current Host listed on ing.Spec.TLS[].Hosts[]
// but TLS[].SecretName is empty; using default cert
if tlsSecretName == "" {
servers[host].SSLCertificate = defaultPemFileName
servers[host].SSLPemChecksum = defaultPemSHA
continue
}
key := fmt.Sprintf("%v/%v", ing.Namespace, tlsSecretName)
bc, exists := ic.sslCertTracker.Get(key)
if exists {
cert := bc.(*ingress.SSLCert)