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controller.go
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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"
"math/rand"
"net"
"reflect"
"sort"
"strconv"
"strings"
"sync"
"sync/atomic"
"time"
"github.com/golang/glog"
apiv1 "k8s.io/api/core/v1"
extensions "k8s.io/api/extensions/v1beta1"
"k8s.io/apimachinery/pkg/conversion"
"k8s.io/apimachinery/pkg/util/intstr"
"k8s.io/apimachinery/pkg/util/sets"
"k8s.io/apimachinery/pkg/util/wait"
clientset "k8s.io/client-go/kubernetes"
"k8s.io/client-go/kubernetes/scheme"
v1core "k8s.io/client-go/kubernetes/typed/core/v1"
"k8s.io/client-go/tools/record"
"k8s.io/client-go/util/flowcontrol"
"github.com/jcmoraisjr/haproxy-ingress/pkg/common/ingress"
"github.com/jcmoraisjr/haproxy-ingress/pkg/common/ingress/annotations/bluegreen"
"github.com/jcmoraisjr/haproxy-ingress/pkg/common/ingress/annotations/class"
"github.com/jcmoraisjr/haproxy-ingress/pkg/common/ingress/annotations/connection"
"github.com/jcmoraisjr/haproxy-ingress/pkg/common/ingress/annotations/healthcheck"
"github.com/jcmoraisjr/haproxy-ingress/pkg/common/ingress/annotations/hsts"
"github.com/jcmoraisjr/haproxy-ingress/pkg/common/ingress/annotations/parser"
"github.com/jcmoraisjr/haproxy-ingress/pkg/common/ingress/annotations/proxy"
"github.com/jcmoraisjr/haproxy-ingress/pkg/common/ingress/annotations/proxybackend"
"github.com/jcmoraisjr/haproxy-ingress/pkg/common/ingress/annotations/sessionaffinity"
"github.com/jcmoraisjr/haproxy-ingress/pkg/common/ingress/annotations/snippet"
"github.com/jcmoraisjr/haproxy-ingress/pkg/common/ingress/defaults"
"github.com/jcmoraisjr/haproxy-ingress/pkg/common/ingress/resolver"
"github.com/jcmoraisjr/haproxy-ingress/pkg/common/ingress/status"
"github.com/jcmoraisjr/haproxy-ingress/pkg/common/k8s"
"github.com/jcmoraisjr/haproxy-ingress/pkg/common/net/ssl"
"github.com/jcmoraisjr/haproxy-ingress/pkg/common/task"
"github.com/jcmoraisjr/haproxy-ingress/pkg/common/utils"
)
const (
defUpstreamName = "upstream-default-backend"
defServerName = "_"
rootLocation = "/"
fakeCertificate = "default-fake-certificate"
)
var (
// list of ports that cannot be used by TCP or UDP services
reservedPorts = []string{"8181", "18080"}
fakeCertificatePath = ""
fakeCertificateSHA = ""
cloner = conversion.NewCloner()
)
// GenericController holds the boilerplate code required to build an Ingress controlller.
type GenericController struct {
cfg *Configuration
defaultBackend *defaults.Backend
listers *ingress.StoreLister
cacheController *cacheController
annotations annotationExtractor
recorder record.EventRecorder
syncQueue *task.Queue
syncStatus status.Sync
// local store of SSL certificates
// (only certificates used in ingress)
sslCertTracker *sslCertTracker
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{}
// runningConfig contains the running configuration in the Backend
runningConfig *ingress.Configuration
forceReload int32
}
// Configuration contains all the settings required by an Ingress controller
type Configuration struct {
Client clientset.Interface
RateLimitUpdate float32
ResyncPeriod time.Duration
DefaultService string
IngressClass string
Namespace string
ConfigMapName string
ForceNamespaceIsolation bool
AllowCrossNamespace bool
DisableNodeList bool
// optional
TCPConfigMapName string
// optional
UDPConfigMapName string
DefaultSSLCertificate string
VerifyHostname bool
DefaultHealthzURL string
DefaultIngressClass string
// optional
PublishService string
// Backend is the particular implementation to be used.
// (for instance NGINX)
Backend ingress.Controller
UpdateStatus bool
UseNodeInternalIP bool
ElectionID string
UpdateStatusOnShutdown bool
SortBackends bool
}
// newIngressController creates an Ingress controller
func newIngressController(config *Configuration) *GenericController {
eventBroadcaster := record.NewBroadcaster()
eventBroadcaster.StartLogging(glog.Infof)
eventBroadcaster.StartRecordingToSink(&v1core.EventSinkImpl{
Interface: config.Client.CoreV1().Events(config.Namespace),
})
ic := GenericController{
cfg: config,
stopLock: &sync.Mutex{},
stopCh: make(chan struct{}),
syncRateLimiter: flowcontrol.NewTokenBucketRateLimiter(config.RateLimitUpdate, 1),
recorder: eventBroadcaster.NewRecorder(scheme.Scheme, apiv1.EventSource{
Component: "ingress-controller",
}),
sslCertTracker: newSSLCertTracker(),
}
ic.syncQueue = task.NewTaskQueue(ic.syncIngress)
ic.listers, ic.cacheController = ic.createListers(config.DisableNodeList)
if config.UpdateStatus {
ic.syncStatus = status.NewStatusSyncer(status.Config{
Client: config.Client,
PublishService: ic.cfg.PublishService,
IngressLister: ic.listers.Ingress,
ElectionID: config.ElectionID,
IngressClass: config.IngressClass,
DefaultIngressClass: config.DefaultIngressClass,
UpdateStatusOnShutdown: config.UpdateStatusOnShutdown,
CustomIngressStatus: ic.cfg.Backend.UpdateIngressStatus,
UseNodeInternalIP: ic.cfg.UseNodeInternalIP,
})
} else {
glog.Warning("Update of ingress status is disabled (flag --update-status=false was specified)")
}
ic.annotations = newAnnotationExtractor(&ic)
ic.cfg.Backend.SetListers(ic.listers)
cloner.RegisterDeepCopyFunc(ingress.GetGeneratedDeepCopyFuncs)
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 {
if ic.defaultBackend == nil {
defaultBackend := ic.cfg.Backend.BackendDefaults()
ic.defaultBackend = &defaultBackend
}
// this can cause a nil dereference due to nil assignment
// of ic.defaultBackend on syncIngress()
// we are safe here because all GetDefaultBackend() calls
// are in the same thread, coming from syncIngress()
return *ic.defaultBackend
}
// GetPublishService returns the configured service used to set ingress status
func (ic GenericController) GetPublishService() *apiv1.Service {
s, err := ic.listers.Service.GetByName(ic.cfg.PublishService)
if err != nil {
return nil
}
return s
}
// GetRecorder returns the event recorder
func (ic GenericController) GetRecorder() record.EventRecorder {
return ic.recorder
}
// GetSecret searches for a secret in the local secrets Store
func (ic GenericController) GetSecret(name string) (*apiv1.Secret, error) {
return ic.listers.Secret.GetByName(name)
}
// GetService searches for a service in the local secrets Store
func (ic GenericController) GetService(name string) (*apiv1.Service, error) {
return ic.listers.Service.GetByName(name)
}
// 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(item interface{}) error {
ic.syncRateLimiter.Accept()
if ic.syncQueue.IsShuttingDown() {
return nil
}
// force reload of default backend data
// see GetDefaultBackend()
ic.defaultBackend = nil
if element, ok := item.(task.Element); ok {
if name, ok := element.Key.(string); ok {
if obj, exists, _ := ic.listers.Ingress.GetByKey(name); exists {
ing := obj.(*extensions.Ingress)
ic.readSecrets(ing)
}
}
}
// Sort ingress rules using the ResourceVersion field
ings := ic.listers.Ingress.List()
sort.SliceStable(ings, func(i, j int) bool {
ir := ings[i].(*extensions.Ingress).ResourceVersion
jr := ings[j].(*extensions.Ingress).ResourceVersion
return ir < jr
})
// filter ingress rules
var ingresses []*extensions.Ingress
for _, ingIf := range ings {
ing := ingIf.(*extensions.Ingress)
if !class.IsValid(ing, ic.cfg.IngressClass, ic.cfg.DefaultIngressClass) {
continue
}
ingresses = append(ingresses, ing)
}
upstreams, servers := ic.getBackendServers(ingresses)
var passUpstreams []*ingress.SSLPassthroughBackend
for _, server := range servers {
if !server.SSLPassthrough.HasSSLPassthrough {
continue
}
for _, loc := range server.Locations {
if loc.Path != "" && 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,
HTTPPassBackend: loc.HTTPPassBackend,
Hostname: server.Hostname,
Service: loc.Service,
Port: loc.Port,
})
break
}
}
pcfg := ingress.Configuration{
Backends: upstreams,
Servers: servers,
TCPEndpoints: ic.getStreamServices(ic.cfg.TCPConfigMapName, apiv1.ProtocolTCP),
UDPEndpoints: ic.getStreamServices(ic.cfg.UDPConfigMapName, apiv1.ProtocolUDP),
PassthroughBackends: passUpstreams,
}
if !ic.isForceReload() && ic.runningConfig != nil && ic.runningConfig.Equal(&pcfg) {
glog.V(3).Infof("skipping backend reload (no changes detected)")
return nil
}
glog.Infof("backend reload required")
err := ic.cfg.Backend.OnUpdate(pcfg)
if err != nil {
incReloadErrorCount()
glog.Errorf("unexpected failure restarting the backend: \n%v", err)
return err
}
glog.Infof("ingress backend successfully reloaded...")
incReloadCount()
setSSLExpireTime(servers)
ic.runningConfig = &pcfg
ic.SetForceReload(false)
return nil
}
func (ic *GenericController) getStreamServices(configmapName string, proto apiv1.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{}
}
_, _, err := k8s.ParseNameNS(configmapName)
if err != nil {
glog.Errorf("unexpected error reading configmap %v: %v", configmapName, err)
return []ingress.L4Service{}
}
configmap, err := ic.listers.ConfigMap.GetByName(configmapName)
if err != nil {
glog.Errorf("unexpected error reading configmap %v: %v", configmapName, 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 utils.StringInSlice(k, reservedPorts) {
glog.Warningf("port %v cannot be used for TCP or UDP services. It is reserved for the Ingress controller", k)
continue
}
// 1: namespace/name of the target service
// 2: port number
// 3: "PROXY" means accept proxy protocol
// 4: "PROXY[-V1|V2]" means send proxy protocol, defaults to V2
// 5: namespace/name of crt/key secret if should ssl-offload
nsSvcPort := utils.SplitMin(v, ":", 5)
nsName := nsSvcPort[0]
svcPort := nsSvcPort[1]
if nsName == "" || svcPort == "" {
glog.Warningf("invalid format (namespace/service-name:port:[PROXY]:[PROXY[-V1|-V2]]:namespace/secret-name) '%v'", v)
continue
}
svcProxyProtocol := ingress.ProxyProtocol{}
// Proxy protocol is only possible if the service is TCP
if proto == apiv1.ProtocolTCP {
svcProxyProtocol.Decode = strings.ToUpper(nsSvcPort[2]) == "PROXY"
svcProxyProtocol.EncodeVersion = proxyProtocolParamToVersion(nsSvcPort[3])
} else if nsSvcPort[2] != "" || nsSvcPort[3] != "" {
glog.Warningf("ignoring PROXY protocol on non TCP service %v:%v", nsName, svcPort)
}
crtSecret := nsSvcPort[4]
if crtSecret != "" {
_, _, err = k8s.ParseNameNS(crtSecret)
if err != nil {
glog.Warningf("%v", err)
continue
}
}
svcNs, svcName, err := k8s.ParseNameNS(nsName)
if err != nil {
glog.Warningf("%v", err)
continue
}
svcObj, svcExists, err := ic.listers.Service.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.(*apiv1.Service)
crt := &ingress.SSLCert{}
if crtSecret != "" {
crt, err = ic.GetCertificate(crtSecret)
if err != nil {
glog.Errorf("error reading crt/key of TCP service %v/%v: %v", nsName, svcPort, err)
continue
}
}
var endps []ingress.Endpoint
targetPort, err := strconv.Atoi(svcPort)
if err != nil {
glog.V(3).Infof("searching service %v endpoints using the name '%v'", svcNs, svcName, svcPort)
for _, sp := range svc.Spec.Ports {
if sp.Name == svcPort {
if sp.Protocol == proto {
endps = ic.getEndpoints(svc, &sp, 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) {
if sp.Protocol == proto {
endps = ic.getEndpoints(svc, &sp, 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,
ProxyProtocol: svcProxyProtocol,
SSLCert: *crt,
},
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,
BalanceAlgorithm: ic.GetDefaultBackend().BalanceAlgorithm,
SlotsIncrement: ic.GetDefaultBackend().BackendServerSlotsIncrement,
}
svcKey := ic.cfg.DefaultService
svcObj, svcExists, err := ic.listers.Service.GetByKey(svcKey)
if err != nil {
glog.Warningf("unexpected error searching the default backend %v: %v", ic.cfg.DefaultService, err)
upstream.Endpoints = append(upstream.Endpoints, ic.cfg.Backend.DefaultEndpoint())
return upstream
}
if !svcExists {
glog.Warningf("service %v does not exist", svcKey)
upstream.Endpoints = append(upstream.Endpoints, ic.cfg.Backend.DefaultEndpoint())
return upstream
}
svc := svcObj.(*apiv1.Service)
endps := ic.getEndpoints(svc, &svc.Spec.Ports[0], apiv1.ProtocolTCP, &healthcheck.Upstream{})
if len(endps) == 0 {
glog.Warningf("service %v does not have any active endpoints", svcKey)
endps = []ingress.Endpoint{ic.cfg.Backend.DefaultEndpoint()}
}
upstream.Service = svc
upstream.Endpoints = append(upstream.Endpoints, endps...)
return upstream
}
type backendContext struct {
ing *extensions.Ingress
affinity *sessionaffinity.AffinityConfig
balance string
blueGreen *bluegreen.Config
proxy *proxybackend.Config
snippet snippet.Config
conn *connection.Config
slotsInc int
useresolver string
}
func (ic *GenericController) createBackendContext(ing *extensions.Ingress) *backendContext {
return &backendContext{
affinity: ic.annotations.SessionAffinity(ing),
balance: ic.annotations.BalanceAlgorithm(ing),
blueGreen: ic.annotations.BlueGreen(ing),
proxy: ic.annotations.ProxyBackend(ing),
snippet: ic.annotations.ConfigurationSnippet(ing),
conn: ic.annotations.Connection(ing),
slotsInc: ic.annotations.SlotsIncrement(ing),
useresolver: ic.annotations.UseResolver(ing),
}
}
// 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(ingresses []*extensions.Ingress) ([]*ingress.Backend, []*ingress.Server) {
du := ic.getDefaultUpstream()
upstreams := ic.createUpstreams(ingresses, du)
servers := ic.createServers(ingresses, upstreams, du)
for _, ing := range ingresses {
ctx := ic.createBackendContext(ing)
if ing.Spec.Backend != nil {
upsName := fmt.Sprintf("%v-%v-%v",
ing.GetNamespace(),
ing.Spec.Backend.ServiceName,
ing.Spec.Backend.ServicePort.String())
ctx.copyBackendAnnotations(upstreams[upsName])
}
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
}
if server.CertificateAuth.CAFileName == "" {
ca := ic.annotations.CertificateAuth(ing)
if ca != nil {
server.CertificateAuth = *ca
// It is possible that no CAFileName is found in the secret
if server.CertificateAuth.CAFileName == "" {
glog.V(3).Infof("secret %v does not contain 'ca.crt', mutual authentication not enabled - ingress rule %v/%v.", server.CertificateAuth.Secret, ing.Namespace, ing.Name)
}
}
} else {
glog.V(3).Infof("server %v already contains a mutual authentication configuration - ingress rule %v/%v", server.Hostname, ing.Namespace, ing.Name)
}
for _, path := range rule.HTTP.Paths {
upsName := fmt.Sprintf("%v-%v-%v",
ing.GetNamespace(),
path.Backend.ServiceName,
path.Backend.ServicePort.String())
ups, found := upstreams[upsName]
if !found {
// a skipped ssl-passthrough path, just ignore
continue
}
var upshttpPassName string
if httpPort := server.SSLPassthrough.HTTPPort; server.SSLPassthrough.HasSSLPassthrough && httpPort > 0 {
if httpPort != path.Backend.ServicePort.IntValue() {
upshttpPassName = fmt.Sprintf("%v-%v-%v",
ing.GetNamespace(), path.Backend.ServiceName, httpPort)
ctx.copyBackendAnnotations(upstreams[upshttpPassName])
} else {
// cannot reuse the same port on ssl-passthrough (https) and http
glog.Warningf("ssl-passthrough http and https ports are the same, ignoring http port")
}
}
// 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.HTTPPassBackend = upshttpPassName
loc.Port = ups.Port
loc.Service = ups.Service
loc.Ingress = ing
mergeLocationAnnotations(loc, anns)
if loc.Redirect.FromToWWW {
server.RedirectFromToWWW = true
}
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,
HTTPPassBackend: upshttpPassName,
IsDefBackend: false,
Service: ups.Service,
Port: ups.Port,
Ingress: ing,
}
mergeLocationAnnotations(loc, anns)
if loc.Redirect.FromToWWW {
server.RedirectFromToWWW = true
}
server.Locations = append(server.Locations, loc)
}
ctx.copyBackendAnnotations(upstreams[upsName])
if ctx.affinity.AffinityType == "cookie" {
locs := ups.SessionAffinity.CookieSessionAffinity.Locations
if _, ok := locs[host]; !ok {
locs[host] = []string{}
}
locs[host] = append(locs[host], path.Path)
}
}
}
}
// update backends (upstreams) with passthrough config
for _, upstream := range upstreams {
var isHTTPSfrom []*ingress.Server
for _, server := range servers {
for _, location := range server.Locations {
if upstream.Name == location.Backend {
if len(upstream.Endpoints) == 0 {
glog.V(3).Infof("upstream %v does not have any active endpoints. Using default backend", upstream.Name)
location.Backend = defUpstreamName
}
if server.SSLPassthrough.HasSSLPassthrough && 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)
}
}
if upstream.Name == location.HTTPPassBackend && len(upstream.Endpoints) == 0 {
glog.V(3).Infof("upstream %v does not have any active endpoints. Using default backend", upstream.Name)
location.HTTPPassBackend = defUpstreamName
}
}
}
if len(isHTTPSfrom) > 0 {
upstream.SSLPassthrough = true
}
}
weightBalance(&upstreams, ic.listers.Pod)
aUpstreams := make([]*ingress.Backend, 0, len(upstreams))
// create the list of upstreams and skip those without endpoints
for _, upstream := range upstreams {
if len(upstream.Endpoints) == 0 {
continue
}
aUpstreams = append(aUpstreams, upstream)
}
if ic.cfg.SortBackends {
sort.SliceStable(aUpstreams, func(a, b int) bool {
return aUpstreams[a].Name < aUpstreams[b].Name
})
}
aServers := make([]*ingress.Server, 0, len(servers))
for _, value := range servers {
sort.SliceStable(value.Locations, func(i, j int) bool {
return value.Locations[i].Path > value.Locations[j].Path
})
aServers = append(aServers, value)
}
sort.SliceStable(aServers, func(i, j int) bool {
return aServers[i].Hostname < aServers[j].Hostname
})
return aUpstreams, aServers
}
func (ctx *backendContext) copyBackendAnnotations(backend *ingress.Backend) {
if backend.SessionAffinity.AffinityType == "" {
backend.SessionAffinity.AffinityType = ctx.affinity.AffinityType
}
if ctx.affinity.AffinityType == "cookie" {
backend.SessionAffinity.CookieSessionAffinity.Name = ctx.affinity.CookieConfig.Name
backend.SessionAffinity.CookieSessionAffinity.Strategy = ctx.affinity.CookieConfig.Strategy
backend.SessionAffinity.CookieSessionAffinity.Hash = ctx.affinity.CookieConfig.Hash
}
if backend.BalanceAlgorithm == "" {
backend.BalanceAlgorithm = ctx.balance
}
if len(backend.BlueGreen.DeployWeight) == 0 {
backend.BlueGreen = *ctx.blueGreen
}
if backend.Proxy.ProxyProtocol == "" {
backend.Proxy.ProxyProtocol = ctx.proxy.ProxyProtocol
}
if len(backend.ConfigurationSnippet.Backend) == 0 {
backend.ConfigurationSnippet = ctx.snippet
}
if backend.Connection.MaxConnServer == 0 {
backend.Connection.MaxConnServer = ctx.conn.MaxConnServer
}
if backend.Connection.MaxQueueServer == 0 {
backend.Connection.MaxQueueServer = ctx.conn.MaxQueueServer
}
if backend.Connection.TimeoutQueue == "" {
backend.Connection.TimeoutQueue = ctx.conn.TimeoutQueue
}
if backend.SlotsIncrement == 0 {
backend.SlotsIncrement = ctx.slotsInc
}
if backend.UseResolver == "" {
backend.UseResolver = ctx.useresolver
}
}
// GetAuthCertificate is used by the auth-tls annotations to get a cert from a secret
func (ic GenericController) GetAuthCertificate(name string) (*resolver.AuthSSLCert, error) {
cert, err := ic.GetCertificate(name)
if err != nil {
return &resolver.AuthSSLCert{}, err
}
return &resolver.AuthSSLCert{
Secret: name,
CrtFileName: cert.PemFileName,
CAFileName: cert.CAFileName,
PemSHA: cert.PemSHA,
}, nil
}
// GetCertificate get a SSLCert object from a secret name
func (ic *GenericController) GetCertificate(name string) (*ingress.SSLCert, error) {
crt, exists := ic.sslCertTracker.Get(name)
if !exists {
ic.syncSecret(name)
crt, exists = ic.sslCertTracker.Get(name)
}
if exists {
return crt.(*ingress.SSLCert), nil
}
if _, err := ic.listers.Secret.GetByName(name); err != nil {
return nil, err
}
return nil, fmt.Errorf("secret '%v' have neither ca.crt nor tls.crt/tls.key pair", name)
}
// GetFullResourceName add the currentNamespace prefix if name doesn't provide one
// and AllowCrossNamespace is allowing this
func (ic GenericController) GetFullResourceName(name, currentNamespace string) string {
if name == "" {
return ""
}
if strings.Index(name, "/") == -1 {
// there isn't a slash, just the resourcename
return fmt.Sprintf("%v/%v", currentNamespace, name)
} else if !ic.cfg.AllowCrossNamespace {
// there IS a slash: namespace/resourcename
// and cross namespace isn't allowed
ns := strings.Split(name, "/")[0]
if ns != currentNamespace {
// concat currentNamespace in order to fail resource reading
return fmt.Sprintf("%v/%v", currentNamespace, name)
}
}
return name
}
// createUpstreams creates the NGINX upstreams for each service referenced in
// Ingress rules. The servers inside the upstream are endpoints.
func (ic *GenericController) createUpstreams(data []*extensions.Ingress, du *ingress.Backend) map[string]*ingress.Backend {
upstreams := make(map[string]*ingress.Backend)
upstreams[defUpstreamName] = du
for _, ing := range data {
secUpstream := ic.annotations.SecureUpstream(ing)
hz := ic.annotations.HealthCheck(ing)
serviceUpstream := ic.annotations.ServiceUpstream(ing)
upstreamHashBy := ic.annotations.UpstreamHashBy(ing)
sslpt := ic.annotations.SSLPassthrough(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)
// Add the service cluster endpoint as the upstream instead of individual endpoints
// if the serviceUpstream annotation is enabled
if serviceUpstream {
endpoint, err := ic.getServiceClusterEndpoint(svcKey, ing.Spec.Backend)
if err != nil {
glog.Errorf("Failed to get service cluster endpoint for service %s: %v", svcKey, err)
} else {
upstreams[defBackend].Endpoints = []ingress.Endpoint{endpoint}
}
}
if len(upstreams[defBackend].Endpoints) == 0 {
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 {
backends := []extensions.IngressBackend{path.Backend}
if sslpt.HasSSLPassthrough {
if path.Path != "" && path.Path != rootLocation {
glog.Warningf(
"ignoring path '%v' from sslpassthrough ingress %v/%v",
path.Path, ing.Namespace, ing.Name)
continue
}
if sslpt.HTTPPort > 0 {
backends = append(backends, extensions.IngressBackend{
ServiceName: path.Backend.ServiceName,
ServicePort: intstr.FromInt(sslpt.HTTPPort),
})
}
}
// a dumb loop just to avoid ctrl+c ctrl+v.
// syncIngress and core dependencies need
// to be rewritten from scratch in order
// to fix coupling and improve cohesion.
for _, backend := range backends {
name := fmt.Sprintf("%v-%v-%v",
ing.GetNamespace(),
backend.ServiceName,
backend.ServicePort.String())
if _, ok := upstreams[name]; ok {
continue
}
glog.V(3).Infof("creating upstream %v", name)
upstreams[name] = newUpstream(name)
upstreams[name].Port = backend.ServicePort
if secUpstream != nil && !upstreams[name].Secure.IsSecure {
upstreams[name].Secure = *secUpstream
}
if upstreams[name].UpstreamHashBy == "" {
upstreams[name].UpstreamHashBy = upstreamHashBy
}
svcKey := fmt.Sprintf("%v/%v", ing.GetNamespace(), backend.ServiceName)
// Add the service cluster endpoint as the upstream instead of individual endpoints
// if the serviceUpstream annotation is enabled
if serviceUpstream {
endpoint, err := ic.getServiceClusterEndpoint(svcKey, &backend)
if err != nil {
glog.Errorf("failed to get service cluster endpoint for service %s: %v", svcKey, err)
} else {
upstreams[name].Endpoints = []ingress.Endpoint{endpoint}
}
}
if len(upstreams[name].Endpoints) == 0 {
endp, err := ic.serviceEndpoints(svcKey, backend.ServicePort.String(), hz)
if err != nil {
glog.Warningf("error obtaining service endpoints: %v", err)
continue
}
upstreams[name].Endpoints = endp
}
s, err := ic.listers.Service.GetByName(svcKey)
if err != nil {
glog.Warningf("error obtaining service: %v", err)
continue
}
upstreams[name].Service = s
}
}
}
}
return upstreams
}
func (ic *GenericController) getServiceClusterEndpoint(svcKey string, backend *extensions.IngressBackend) (endpoint ingress.Endpoint, err error) {
svcObj, svcExists, err := ic.listers.Service.GetByKey(svcKey)
if !svcExists {
return endpoint, fmt.Errorf("service %v does not exist", svcKey)
}
svc := svcObj.(*apiv1.Service)
if svc.Spec.ClusterIP == "" || svc.Spec.ClusterIP == "None" {
return endpoint, fmt.Errorf("no ClusterIP found for service %s", svcKey)
}
endpoint.Address = svc.Spec.ClusterIP
// If the service port in the ingress uses a name, lookup
// the actual port in the service spec
if backend.ServicePort.Type == intstr.String {
var port int32 = -1
for _, svcPort := range svc.Spec.Ports {