1276 lines
38 KiB
Go
1276 lines
38 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package controller
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import (
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"fmt"
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"math/rand"
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"sort"
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"strconv"
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"strings"
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"time"
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"github.com/golang/glog"
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"github.com/mitchellh/hashstructure"
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apiv1 "k8s.io/api/core/v1"
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extensions "k8s.io/api/extensions/v1beta1"
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"k8s.io/apimachinery/pkg/util/intstr"
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"k8s.io/apimachinery/pkg/util/sets"
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"k8s.io/apimachinery/pkg/util/wait"
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clientset "k8s.io/client-go/kubernetes"
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"k8s.io/ingress-nginx/internal/ingress"
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"k8s.io/ingress-nginx/internal/ingress/annotations/proxy"
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ngx_config "k8s.io/ingress-nginx/internal/ingress/controller/config"
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"k8s.io/ingress-nginx/internal/k8s"
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)
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const (
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defUpstreamName = "upstream-default-backend"
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defServerName = "_"
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rootLocation = "/"
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)
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// Configuration contains all the settings required by an Ingress controller
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type Configuration struct {
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APIServerHost string
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KubeConfigFile string
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Client clientset.Interface
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ResyncPeriod time.Duration
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ConfigMapName string
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DefaultService string
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Namespace string
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ForceNamespaceIsolation bool
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// +optional
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TCPConfigMapName string
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// +optional
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UDPConfigMapName string
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DefaultHealthzURL string
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HealthCheckTimeout time.Duration
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DefaultSSLCertificate string
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// +optional
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PublishService string
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PublishStatusAddress string
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UpdateStatus bool
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UseNodeInternalIP bool
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ElectionID string
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UpdateStatusOnShutdown bool
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SortBackends bool
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ListenPorts *ngx_config.ListenPorts
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EnableSSLPassthrough bool
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EnableProfiling bool
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EnableSSLChainCompletion bool
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FakeCertificatePath string
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FakeCertificateSHA string
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SyncRateLimit float32
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DynamicCertificatesEnabled bool
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}
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// GetPublishService returns the Service used to set the load-balancer status of Ingresses.
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func (n NGINXController) GetPublishService() *apiv1.Service {
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s, err := n.store.GetService(n.cfg.PublishService)
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if err != nil {
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return nil
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}
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return s
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}
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// syncIngress collects all the pieces required to assemble the NGINX
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// configuration file and passes the resulting data structures to the backend
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// (OnUpdate) when a reload is deemed necessary.
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func (n *NGINXController) syncIngress(interface{}) error {
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n.syncRateLimiter.Accept()
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if n.syncQueue.IsShuttingDown() {
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return nil
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}
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// sort Ingresses using the ResourceVersion field
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ings := n.store.ListIngresses()
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sort.SliceStable(ings, func(i, j int) bool {
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ir := ings[i].ResourceVersion
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jr := ings[j].ResourceVersion
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return ir < jr
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})
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upstreams, servers := n.getBackendServers(ings)
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var passUpstreams []*ingress.SSLPassthroughBackend
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hosts := sets.NewString()
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for _, server := range servers {
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if !hosts.Has(server.Hostname) {
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hosts.Insert(server.Hostname)
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}
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if !server.SSLPassthrough {
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continue
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}
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for _, loc := range server.Locations {
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if loc.Path != rootLocation {
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glog.Warningf("Ignoring SSL Passthrough for location %q in server %q", loc.Path, server.Hostname)
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continue
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}
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passUpstreams = append(passUpstreams, &ingress.SSLPassthroughBackend{
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Backend: loc.Backend,
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Hostname: server.Hostname,
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Service: loc.Service,
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Port: loc.Port,
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})
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break
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}
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}
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pcfg := &ingress.Configuration{
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Backends: upstreams,
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Servers: servers,
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TCPEndpoints: n.getStreamServices(n.cfg.TCPConfigMapName, apiv1.ProtocolTCP),
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UDPEndpoints: n.getStreamServices(n.cfg.UDPConfigMapName, apiv1.ProtocolUDP),
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PassthroughBackends: passUpstreams,
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BackendConfigChecksum: n.store.GetBackendConfiguration().Checksum,
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}
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if n.runningConfig.Equal(pcfg) {
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glog.V(3).Infof("No configuration change detected, skipping backend reload.")
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return nil
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}
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if !n.IsDynamicConfigurationEnough(pcfg) {
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glog.Infof("Configuration changes detected, backend reload required.")
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hash, _ := hashstructure.Hash(pcfg, &hashstructure.HashOptions{
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TagName: "json",
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})
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pcfg.ConfigurationChecksum = fmt.Sprintf("%v", hash)
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err := n.OnUpdate(*pcfg)
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if err != nil {
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n.metricCollector.IncReloadErrorCount()
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n.metricCollector.ConfigSuccess(hash, false)
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glog.Errorf("Unexpected failure reloading the backend:\n%v", err)
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return err
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}
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n.metricCollector.SetHosts(hosts)
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glog.Infof("Backend successfully reloaded.")
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n.metricCollector.ConfigSuccess(hash, true)
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n.metricCollector.IncReloadCount()
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n.metricCollector.SetSSLExpireTime(servers)
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}
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isFirstSync := n.runningConfig.Equal(&ingress.Configuration{})
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if isFirstSync {
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// For the initial sync it always takes some time for NGINX to
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// start listening on the configured port (default 18080)
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// For large configurations it might take a while so we loop
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// and back off
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glog.Info("Initial sync, sleeping for 1 second.")
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time.Sleep(1 * time.Second)
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}
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retry := wait.Backoff{
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Steps: 15,
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Duration: 1 * time.Second,
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Factor: 0.8,
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Jitter: 0.1,
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}
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err := wait.ExponentialBackoff(retry, func() (bool, error) {
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err := configureDynamically(pcfg, n.cfg.ListenPorts.Status, n.cfg.DynamicCertificatesEnabled)
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if err == nil {
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glog.V(2).Infof("Dynamic reconfiguration succeeded.")
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return true, nil
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}
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glog.Warningf("Dynamic reconfiguration failed: %v", err)
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return false, err
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})
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if err != nil {
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glog.Errorf("Unexpected failure reconfiguring NGINX:\n%v", err)
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return err
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}
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ri := getRemovedIngresses(n.runningConfig, pcfg)
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re := getRemovedHosts(n.runningConfig, pcfg)
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n.metricCollector.RemoveMetrics(ri, re)
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n.runningConfig = pcfg
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return nil
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}
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func (n *NGINXController) getStreamServices(configmapName string, proto apiv1.Protocol) []ingress.L4Service {
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if configmapName == "" {
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return []ingress.L4Service{}
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}
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glog.V(3).Infof("Obtaining information about %v stream services from ConfigMap %q", proto, configmapName)
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_, _, err := k8s.ParseNameNS(configmapName)
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if err != nil {
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glog.Errorf("Error parsing ConfigMap reference %q: %v", configmapName, err)
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return []ingress.L4Service{}
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}
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configmap, err := n.store.GetConfigMap(configmapName)
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if err != nil {
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glog.Errorf("Error getting ConfigMap %q: %v", configmapName, err)
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return []ingress.L4Service{}
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}
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var svcs []ingress.L4Service
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var svcProxyProtocol ingress.ProxyProtocol
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rp := []int{
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n.cfg.ListenPorts.HTTP,
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n.cfg.ListenPorts.HTTPS,
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n.cfg.ListenPorts.SSLProxy,
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n.cfg.ListenPorts.Status,
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n.cfg.ListenPorts.Health,
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n.cfg.ListenPorts.Default,
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}
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reserverdPorts := sets.NewInt(rp...)
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// svcRef format: <(str)namespace>/<(str)service>:<(intstr)port>[:<("PROXY")decode>:<("PROXY")encode>]
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for port, svcRef := range configmap.Data {
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externalPort, err := strconv.Atoi(port)
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if err != nil {
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glog.Warningf("%q is not a valid %v port number", port, proto)
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continue
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}
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if reserverdPorts.Has(externalPort) {
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glog.Warningf("Port %d cannot be used for %v stream services. It is reserved for the Ingress controller.", externalPort, proto)
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continue
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}
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nsSvcPort := strings.Split(svcRef, ":")
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if len(nsSvcPort) < 2 {
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glog.Warningf("Invalid Service reference %q for %v port %d", svcRef, proto, externalPort)
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continue
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}
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nsName := nsSvcPort[0]
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svcPort := nsSvcPort[1]
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svcProxyProtocol.Decode = false
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svcProxyProtocol.Encode = false
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// Proxy Protocol is only compatible with TCP Services
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if len(nsSvcPort) >= 3 && proto == apiv1.ProtocolTCP {
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if len(nsSvcPort) >= 3 && strings.ToUpper(nsSvcPort[2]) == "PROXY" {
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svcProxyProtocol.Decode = true
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}
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if len(nsSvcPort) == 4 && strings.ToUpper(nsSvcPort[3]) == "PROXY" {
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svcProxyProtocol.Encode = true
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}
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}
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svcNs, svcName, err := k8s.ParseNameNS(nsName)
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if err != nil {
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glog.Warningf("%v", err)
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continue
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}
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svc, err := n.store.GetService(nsName)
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if err != nil {
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glog.Warningf("Error getting Service %q: %v", nsName, err)
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continue
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}
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var endps []ingress.Endpoint
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targetPort, err := strconv.Atoi(svcPort)
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if err != nil {
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// not a port number, fall back to using port name
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glog.V(3).Infof("Searching Endpoints with %v port name %q for Service %q", proto, svcPort, nsName)
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for _, sp := range svc.Spec.Ports {
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if sp.Name == svcPort {
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if sp.Protocol == proto {
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endps = getEndpoints(svc, &sp, proto, n.store.GetServiceEndpoints)
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break
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}
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}
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}
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} else {
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glog.V(3).Infof("Searching Endpoints with %v port number %d for Service %q", proto, targetPort, nsName)
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for _, sp := range svc.Spec.Ports {
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if sp.Port == int32(targetPort) {
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if sp.Protocol == proto {
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endps = getEndpoints(svc, &sp, proto, n.store.GetServiceEndpoints)
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break
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}
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}
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}
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}
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// stream services cannot contain empty upstreams and there is
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// no default backend equivalent
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if len(endps) == 0 {
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glog.Warningf("Service %q does not have any active Endpoint for %v port %v", nsName, proto, svcPort)
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continue
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}
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svcs = append(svcs, ingress.L4Service{
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Port: externalPort,
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Backend: ingress.L4Backend{
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Name: svcName,
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Namespace: svcNs,
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Port: intstr.FromString(svcPort),
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Protocol: proto,
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ProxyProtocol: svcProxyProtocol,
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},
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Endpoints: endps,
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})
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}
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// Keep upstream order sorted to reduce unnecessary nginx config reloads.
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sort.SliceStable(svcs, func(i, j int) bool {
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return svcs[i].Port < svcs[j].Port
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})
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return svcs
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}
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// getDefaultUpstream returns the upstream associated with the default backend.
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// Configures the upstream to return HTTP code 503 in case of error.
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func (n *NGINXController) getDefaultUpstream() *ingress.Backend {
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upstream := &ingress.Backend{
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Name: defUpstreamName,
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}
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svcKey := n.cfg.DefaultService
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if len(svcKey) == 0 {
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upstream.Endpoints = append(upstream.Endpoints, n.DefaultEndpoint())
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return upstream
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}
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svc, err := n.store.GetService(svcKey)
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if err != nil {
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glog.Warningf("Error getting default backend %q: %v", svcKey, err)
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upstream.Endpoints = append(upstream.Endpoints, n.DefaultEndpoint())
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return upstream
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}
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endps := getEndpoints(svc, &svc.Spec.Ports[0], apiv1.ProtocolTCP, n.store.GetServiceEndpoints)
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if len(endps) == 0 {
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glog.Warningf("Service %q does not have any active Endpoint", svcKey)
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endps = []ingress.Endpoint{n.DefaultEndpoint()}
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}
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upstream.Service = svc
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upstream.Endpoints = append(upstream.Endpoints, endps...)
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return upstream
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}
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// getBackendServers returns a list of Upstream and Server to be used by the
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// backend. An upstream can be used in multiple servers if the namespace,
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// service name and port are the same.
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func (n *NGINXController) getBackendServers(ingresses []*ingress.Ingress) ([]*ingress.Backend, []*ingress.Server) {
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du := n.getDefaultUpstream()
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upstreams := n.createUpstreams(ingresses, du)
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servers := n.createServers(ingresses, upstreams, du)
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for _, ing := range ingresses {
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ingKey := k8s.MetaNamespaceKey(ing)
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anns := ing.ParsedAnnotations
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for _, rule := range ing.Spec.Rules {
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host := rule.Host
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if host == "" {
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host = defServerName
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}
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server := servers[host]
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if server == nil {
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server = servers[defServerName]
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}
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if rule.HTTP == nil &&
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host != defServerName {
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glog.V(3).Infof("Ingress %q does not contain any HTTP rule, using default backend", ingKey)
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continue
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}
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if server.AuthTLSError == "" && anns.CertificateAuth.AuthTLSError != "" {
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server.AuthTLSError = anns.CertificateAuth.AuthTLSError
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}
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if server.CertificateAuth.CAFileName == "" {
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server.CertificateAuth = anns.CertificateAuth
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if server.CertificateAuth.Secret != "" && server.CertificateAuth.CAFileName == "" {
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glog.V(3).Infof("Secret %q has no 'ca.crt' key, mutual authentication disabled for Ingress %q",
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server.CertificateAuth.Secret, ingKey)
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}
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} else {
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glog.V(3).Infof("Server %q is already configured for mutual authentication (Ingress %q)",
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server.Hostname, ingKey)
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}
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if rule.HTTP == nil {
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glog.V(3).Infof("Ingress %q does not contain any HTTP rule, using default backend", ingKey)
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continue
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}
|
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for _, path := range rule.HTTP.Paths {
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upsName := upstreamName(ing.Namespace, path.Backend.ServiceName, path.Backend.ServicePort)
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ups := upstreams[upsName]
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// Backend is not referenced to by a server
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if ups.NoServer {
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continue
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}
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nginxPath := rootLocation
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if path.Path != "" {
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nginxPath = path.Path
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}
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addLoc := true
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for _, loc := range server.Locations {
|
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if loc.Path == nginxPath {
|
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addLoc = false
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|
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if !loc.IsDefBackend {
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glog.V(3).Infof("Location %q already configured for server %q with upstream %q (Ingress %q)",
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loc.Path, server.Hostname, loc.Backend, ingKey)
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break
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}
|
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|
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glog.V(3).Infof("Replacing location %q for server %q with upstream %q to use upstream %q (Ingress %q)",
|
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loc.Path, server.Hostname, loc.Backend, ups.Name, ingKey)
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loc.Backend = ups.Name
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loc.IsDefBackend = false
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loc.Port = ups.Port
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loc.Service = ups.Service
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loc.Ingress = ing
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loc.BasicDigestAuth = anns.BasicDigestAuth
|
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loc.ClientBodyBufferSize = anns.ClientBodyBufferSize
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loc.ConfigurationSnippet = anns.ConfigurationSnippet
|
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loc.CorsConfig = anns.CorsConfig
|
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loc.ExternalAuth = anns.ExternalAuth
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loc.Proxy = anns.Proxy
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loc.RateLimit = anns.RateLimit
|
|
loc.Redirect = anns.Redirect
|
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loc.Rewrite = anns.Rewrite
|
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loc.UpstreamVhost = anns.UpstreamVhost
|
|
loc.Whitelist = anns.Whitelist
|
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loc.Denied = anns.Denied
|
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loc.XForwardedPrefix = anns.XForwardedPrefix
|
|
loc.UsePortInRedirects = anns.UsePortInRedirects
|
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loc.Connection = anns.Connection
|
|
loc.Logs = anns.Logs
|
|
loc.LuaRestyWAF = anns.LuaRestyWAF
|
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loc.InfluxDB = anns.InfluxDB
|
|
loc.DefaultBackend = anns.DefaultBackend
|
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loc.BackendProtocol = anns.BackendProtocol
|
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loc.CustomHTTPErrors = anns.CustomHTTPErrors
|
|
loc.ModSecurity = anns.ModSecurity
|
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|
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if loc.Redirect.FromToWWW {
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server.RedirectFromToWWW = true
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}
|
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break
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}
|
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}
|
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|
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// new location
|
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if addLoc {
|
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glog.V(3).Infof("Adding location %q for server %q with upstream %q (Ingress %q)",
|
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nginxPath, server.Hostname, ups.Name, ingKey)
|
|
|
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loc := &ingress.Location{
|
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Path: nginxPath,
|
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Backend: ups.Name,
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IsDefBackend: false,
|
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Service: ups.Service,
|
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Port: ups.Port,
|
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Ingress: ing,
|
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BasicDigestAuth: anns.BasicDigestAuth,
|
|
ClientBodyBufferSize: anns.ClientBodyBufferSize,
|
|
ConfigurationSnippet: anns.ConfigurationSnippet,
|
|
CorsConfig: anns.CorsConfig,
|
|
ExternalAuth: anns.ExternalAuth,
|
|
Proxy: anns.Proxy,
|
|
RateLimit: anns.RateLimit,
|
|
Redirect: anns.Redirect,
|
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Rewrite: anns.Rewrite,
|
|
UpstreamVhost: anns.UpstreamVhost,
|
|
Whitelist: anns.Whitelist,
|
|
Denied: anns.Denied,
|
|
XForwardedPrefix: anns.XForwardedPrefix,
|
|
UsePortInRedirects: anns.UsePortInRedirects,
|
|
Connection: anns.Connection,
|
|
Logs: anns.Logs,
|
|
LuaRestyWAF: anns.LuaRestyWAF,
|
|
InfluxDB: anns.InfluxDB,
|
|
DefaultBackend: anns.DefaultBackend,
|
|
BackendProtocol: anns.BackendProtocol,
|
|
CustomHTTPErrors: anns.CustomHTTPErrors,
|
|
ModSecurity: anns.ModSecurity,
|
|
}
|
|
|
|
if loc.Redirect.FromToWWW {
|
|
server.RedirectFromToWWW = true
|
|
}
|
|
server.Locations = append(server.Locations, loc)
|
|
}
|
|
|
|
if ups.SessionAffinity.AffinityType == "" {
|
|
ups.SessionAffinity.AffinityType = anns.SessionAffinity.Type
|
|
}
|
|
|
|
if anns.SessionAffinity.Type == "cookie" {
|
|
cookiePath := anns.SessionAffinity.Cookie.Path
|
|
if anns.Rewrite.UseRegex && cookiePath == "" {
|
|
glog.Warningf("session-cookie-path should be set when use-regex is true")
|
|
}
|
|
|
|
ups.SessionAffinity.CookieSessionAffinity.Name = anns.SessionAffinity.Cookie.Name
|
|
ups.SessionAffinity.CookieSessionAffinity.Hash = anns.SessionAffinity.Cookie.Hash
|
|
ups.SessionAffinity.CookieSessionAffinity.Expires = anns.SessionAffinity.Cookie.Expires
|
|
ups.SessionAffinity.CookieSessionAffinity.MaxAge = anns.SessionAffinity.Cookie.MaxAge
|
|
ups.SessionAffinity.CookieSessionAffinity.Path = cookiePath
|
|
|
|
locs := ups.SessionAffinity.CookieSessionAffinity.Locations
|
|
if _, ok := locs[host]; !ok {
|
|
locs[host] = []string{}
|
|
}
|
|
locs[host] = append(locs[host], path.Path)
|
|
}
|
|
}
|
|
}
|
|
|
|
if anns.Canary.Enabled {
|
|
glog.Infof("Canary ingress %v detected. Finding eligible backends to merge into.", ing.Name)
|
|
mergeAlternativeBackends(ing, upstreams, servers)
|
|
}
|
|
}
|
|
|
|
aUpstreams := make([]*ingress.Backend, 0, len(upstreams))
|
|
|
|
for _, upstream := range upstreams {
|
|
aUpstreams = append(aUpstreams, upstream)
|
|
|
|
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 %q has no active Endpoint", upstream.Name)
|
|
// check if the location contains endpoints and a custom default backend
|
|
if location.DefaultBackend != nil {
|
|
sp := location.DefaultBackend.Spec.Ports[0]
|
|
endps := getEndpoints(location.DefaultBackend, &sp, apiv1.ProtocolTCP, n.store.GetServiceEndpoints)
|
|
if len(endps) > 0 {
|
|
glog.V(3).Infof("Using custom default backend for location %q in server %q (Service \"%v/%v\")",
|
|
location.Path, server.Hostname, location.DefaultBackend.Namespace, location.DefaultBackend.Name)
|
|
|
|
nb := upstream.DeepCopy()
|
|
name := fmt.Sprintf("custom-default-backend-%v", upstream.Name)
|
|
nb.Name = name
|
|
nb.Endpoints = endps
|
|
aUpstreams = append(aUpstreams, nb)
|
|
location.Backend = name
|
|
}
|
|
}
|
|
}
|
|
|
|
if server.SSLPassthrough {
|
|
if location.Path == rootLocation {
|
|
if location.Backend == defUpstreamName {
|
|
glog.Warningf("Server %q has no default backend, ignoring SSL Passthrough.", server.Hostname)
|
|
continue
|
|
}
|
|
isHTTPSfrom = append(isHTTPSfrom, server)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if len(isHTTPSfrom) > 0 {
|
|
upstream.SSLPassthrough = true
|
|
}
|
|
}
|
|
|
|
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
|
|
})
|
|
|
|
sort.SliceStable(value.Locations, func(i, j int) bool {
|
|
return len(value.Locations[i].Path) > len(value.Locations[j].Path)
|
|
})
|
|
aServers = append(aServers, value)
|
|
}
|
|
|
|
sort.SliceStable(aUpstreams, func(a, b int) bool {
|
|
return aUpstreams[a].Name < aUpstreams[b].Name
|
|
})
|
|
|
|
sort.SliceStable(aServers, func(i, j int) bool {
|
|
return aServers[i].Hostname < aServers[j].Hostname
|
|
})
|
|
|
|
return aUpstreams, aServers
|
|
}
|
|
|
|
// createUpstreams creates the NGINX upstreams (Endpoints) for each Service
|
|
// referenced in Ingress rules.
|
|
func (n *NGINXController) createUpstreams(data []*ingress.Ingress, du *ingress.Backend) map[string]*ingress.Backend {
|
|
upstreams := make(map[string]*ingress.Backend)
|
|
upstreams[defUpstreamName] = du
|
|
|
|
for _, ing := range data {
|
|
anns := ing.ParsedAnnotations
|
|
|
|
var defBackend string
|
|
if ing.Spec.Backend != nil {
|
|
defBackend = upstreamName(ing.Namespace, ing.Spec.Backend.ServiceName, ing.Spec.Backend.ServicePort)
|
|
|
|
glog.V(3).Infof("Creating upstream %q", defBackend)
|
|
upstreams[defBackend] = newUpstream(defBackend)
|
|
if upstreams[defBackend].SecureCACert.Secret == "" {
|
|
upstreams[defBackend].SecureCACert = anns.SecureUpstream.CACert
|
|
}
|
|
if upstreams[defBackend].UpstreamHashBy == "" {
|
|
upstreams[defBackend].UpstreamHashBy = anns.UpstreamHashBy
|
|
}
|
|
if upstreams[defBackend].LoadBalancing == "" {
|
|
upstreams[defBackend].LoadBalancing = anns.LoadBalancing
|
|
}
|
|
|
|
svcKey := fmt.Sprintf("%v/%v", ing.Namespace, ing.Spec.Backend.ServiceName)
|
|
|
|
// add the service ClusterIP as a single Endpoint instead of individual Endpoints
|
|
if anns.ServiceUpstream {
|
|
endpoint, err := n.getServiceClusterEndpoint(svcKey, ing.Spec.Backend)
|
|
if err != nil {
|
|
glog.Errorf("Failed to determine a suitable ClusterIP Endpoint for Service %q: %v", svcKey, err)
|
|
} else {
|
|
upstreams[defBackend].Endpoints = []ingress.Endpoint{endpoint}
|
|
}
|
|
}
|
|
|
|
// configure traffic shaping for canary
|
|
if anns.Canary.Enabled {
|
|
upstreams[defBackend].NoServer = true
|
|
upstreams[defBackend].TrafficShapingPolicy = ingress.TrafficShapingPolicy{
|
|
Weight: anns.Canary.Weight,
|
|
Header: anns.Canary.Header,
|
|
Cookie: anns.Canary.Cookie,
|
|
}
|
|
}
|
|
|
|
if len(upstreams[defBackend].Endpoints) == 0 {
|
|
endps, err := n.serviceEndpoints(svcKey, ing.Spec.Backend.ServicePort.String())
|
|
upstreams[defBackend].Endpoints = append(upstreams[defBackend].Endpoints, endps...)
|
|
if err != nil {
|
|
glog.Warningf("Error creating upstream %q: %v", defBackend, err)
|
|
}
|
|
}
|
|
|
|
s, err := n.store.GetService(svcKey)
|
|
if err != nil {
|
|
glog.Warningf("Error obtaining Service %q: %v", svcKey, err)
|
|
}
|
|
upstreams[defBackend].Service = s
|
|
}
|
|
|
|
for _, rule := range ing.Spec.Rules {
|
|
if rule.HTTP == nil {
|
|
continue
|
|
}
|
|
|
|
for _, path := range rule.HTTP.Paths {
|
|
name := upstreamName(ing.Namespace, path.Backend.ServiceName, path.Backend.ServicePort)
|
|
|
|
if _, ok := upstreams[name]; ok {
|
|
continue
|
|
}
|
|
|
|
glog.V(3).Infof("Creating upstream %q", name)
|
|
upstreams[name] = newUpstream(name)
|
|
upstreams[name].Port = path.Backend.ServicePort
|
|
|
|
if upstreams[name].SecureCACert.Secret == "" {
|
|
upstreams[name].SecureCACert = anns.SecureUpstream.CACert
|
|
}
|
|
|
|
if upstreams[name].UpstreamHashBy == "" {
|
|
upstreams[name].UpstreamHashBy = anns.UpstreamHashBy
|
|
}
|
|
|
|
if upstreams[name].LoadBalancing == "" {
|
|
upstreams[name].LoadBalancing = anns.LoadBalancing
|
|
}
|
|
|
|
svcKey := fmt.Sprintf("%v/%v", ing.Namespace, path.Backend.ServiceName)
|
|
|
|
// add the service ClusterIP as a single Endpoint instead of individual Endpoints
|
|
if anns.ServiceUpstream {
|
|
endpoint, err := n.getServiceClusterEndpoint(svcKey, &path.Backend)
|
|
if err != nil {
|
|
glog.Errorf("Failed to determine a suitable ClusterIP Endpoint for Service %q: %v", svcKey, err)
|
|
} else {
|
|
upstreams[name].Endpoints = []ingress.Endpoint{endpoint}
|
|
}
|
|
}
|
|
|
|
// configure traffic shaping for canary
|
|
if anns.Canary.Enabled {
|
|
upstreams[name].NoServer = true
|
|
upstreams[name].TrafficShapingPolicy = ingress.TrafficShapingPolicy{
|
|
Weight: anns.Canary.Weight,
|
|
Header: anns.Canary.Header,
|
|
Cookie: anns.Canary.Cookie,
|
|
}
|
|
}
|
|
|
|
if len(upstreams[name].Endpoints) == 0 {
|
|
endp, err := n.serviceEndpoints(svcKey, path.Backend.ServicePort.String())
|
|
if err != nil {
|
|
glog.Warningf("Error obtaining Endpoints for Service %q: %v", svcKey, err)
|
|
continue
|
|
}
|
|
upstreams[name].Endpoints = endp
|
|
}
|
|
|
|
s, err := n.store.GetService(svcKey)
|
|
if err != nil {
|
|
glog.Warningf("Error obtaining Service %q: %v", svcKey, err)
|
|
continue
|
|
}
|
|
|
|
upstreams[name].Service = s
|
|
}
|
|
}
|
|
}
|
|
|
|
return upstreams
|
|
}
|
|
|
|
// getServiceClusterEndpoint returns an Endpoint corresponding to the ClusterIP
|
|
// field of a Service.
|
|
func (n *NGINXController) getServiceClusterEndpoint(svcKey string, backend *extensions.IngressBackend) (endpoint ingress.Endpoint, err error) {
|
|
svc, err := n.store.GetService(svcKey)
|
|
if err != nil {
|
|
return endpoint, fmt.Errorf("service %q does not exist", svcKey)
|
|
}
|
|
|
|
if svc.Spec.ClusterIP == "" || svc.Spec.ClusterIP == "None" {
|
|
return endpoint, fmt.Errorf("no ClusterIP found for Service %q", svcKey)
|
|
}
|
|
|
|
endpoint.Address = svc.Spec.ClusterIP
|
|
|
|
// if the Service port is referenced by name in the Ingress, lookup the
|
|
// actual port in the service spec
|
|
if backend.ServicePort.Type == intstr.String {
|
|
var port int32 = -1
|
|
for _, svcPort := range svc.Spec.Ports {
|
|
if svcPort.Name == backend.ServicePort.String() {
|
|
port = svcPort.Port
|
|
break
|
|
}
|
|
}
|
|
if port == -1 {
|
|
return endpoint, fmt.Errorf("service %q does not have a port named %q", svc.Name, backend.ServicePort)
|
|
}
|
|
endpoint.Port = fmt.Sprintf("%d", port)
|
|
} else {
|
|
endpoint.Port = backend.ServicePort.String()
|
|
}
|
|
|
|
return endpoint, err
|
|
}
|
|
|
|
// serviceEndpoints returns the upstream servers (Endpoints) associated with a Service.
|
|
func (n *NGINXController) serviceEndpoints(svcKey, backendPort string) ([]ingress.Endpoint, error) {
|
|
svc, err := n.store.GetService(svcKey)
|
|
|
|
var upstreams []ingress.Endpoint
|
|
if err != nil {
|
|
return upstreams, err
|
|
}
|
|
|
|
glog.V(3).Infof("Obtaining ports information for Service %q", svcKey)
|
|
for _, servicePort := range svc.Spec.Ports {
|
|
// targetPort could be a string, use either the port name or number (int)
|
|
if strconv.Itoa(int(servicePort.Port)) == backendPort ||
|
|
servicePort.TargetPort.String() == backendPort ||
|
|
servicePort.Name == backendPort {
|
|
|
|
endps := getEndpoints(svc, &servicePort, apiv1.ProtocolTCP, n.store.GetServiceEndpoints)
|
|
if len(endps) == 0 {
|
|
glog.Warningf("Service %q does not have any active Endpoint.", svcKey)
|
|
}
|
|
|
|
if n.cfg.SortBackends {
|
|
sort.SliceStable(endps, func(i, j int) bool {
|
|
iName := endps[i].Address
|
|
jName := endps[j].Address
|
|
if iName != jName {
|
|
return iName < jName
|
|
}
|
|
|
|
return endps[i].Port < endps[j].Port
|
|
})
|
|
}
|
|
upstreams = append(upstreams, endps...)
|
|
break
|
|
}
|
|
}
|
|
|
|
// Ingress with an ExternalName Service and no port defined for that Service
|
|
if len(svc.Spec.Ports) == 0 && svc.Spec.Type == apiv1.ServiceTypeExternalName {
|
|
externalPort, err := strconv.Atoi(backendPort)
|
|
if err != nil {
|
|
glog.Warningf("Only numeric ports are allowed in ExternalName Services: %q is not a valid port number.", backendPort)
|
|
return upstreams, nil
|
|
}
|
|
|
|
servicePort := apiv1.ServicePort{
|
|
Protocol: "TCP",
|
|
Port: int32(externalPort),
|
|
TargetPort: intstr.FromString(backendPort),
|
|
}
|
|
endps := getEndpoints(svc, &servicePort, apiv1.ProtocolTCP, n.store.GetServiceEndpoints)
|
|
if len(endps) == 0 {
|
|
glog.Warningf("Service %q does not have any active Endpoint.", svcKey)
|
|
return upstreams, nil
|
|
}
|
|
|
|
upstreams = append(upstreams, endps...)
|
|
return upstreams, nil
|
|
}
|
|
|
|
if !n.cfg.SortBackends {
|
|
rand.Seed(time.Now().UnixNano())
|
|
for i := range upstreams {
|
|
j := rand.Intn(i + 1)
|
|
upstreams[i], upstreams[j] = upstreams[j], upstreams[i]
|
|
}
|
|
}
|
|
|
|
return upstreams, nil
|
|
}
|
|
|
|
// createServers builds a map of host name to Server structs from a map of
|
|
// already computed Upstream structs. Each Server is configured with at least
|
|
// one root location, which uses a default backend if left unspecified.
|
|
func (n *NGINXController) createServers(data []*ingress.Ingress,
|
|
upstreams map[string]*ingress.Backend,
|
|
du *ingress.Backend) map[string]*ingress.Server {
|
|
|
|
servers := make(map[string]*ingress.Server, len(data))
|
|
aliases := make(map[string]string, len(data))
|
|
|
|
bdef := n.store.GetDefaultBackend()
|
|
ngxProxy := proxy.Config{
|
|
BodySize: bdef.ProxyBodySize,
|
|
ConnectTimeout: bdef.ProxyConnectTimeout,
|
|
SendTimeout: bdef.ProxySendTimeout,
|
|
ReadTimeout: bdef.ProxyReadTimeout,
|
|
BufferSize: bdef.ProxyBufferSize,
|
|
CookieDomain: bdef.ProxyCookieDomain,
|
|
CookiePath: bdef.ProxyCookiePath,
|
|
NextUpstream: bdef.ProxyNextUpstream,
|
|
NextUpstreamTries: bdef.ProxyNextUpstreamTries,
|
|
RequestBuffering: bdef.ProxyRequestBuffering,
|
|
ProxyRedirectFrom: bdef.ProxyRedirectFrom,
|
|
ProxyBuffering: bdef.ProxyBuffering,
|
|
}
|
|
|
|
// generated on Start() with createDefaultSSLCertificate()
|
|
defaultPemFileName := n.cfg.FakeCertificatePath
|
|
defaultPemSHA := n.cfg.FakeCertificateSHA
|
|
|
|
// read custom default SSL certificate, fall back to generated default certificate
|
|
defaultCertificate, err := n.store.GetLocalSSLCert(n.cfg.DefaultSSLCertificate)
|
|
if err == nil {
|
|
defaultPemFileName = defaultCertificate.PemFileName
|
|
defaultPemSHA = defaultCertificate.PemSHA
|
|
}
|
|
|
|
// initialize default server and root location
|
|
servers[defServerName] = &ingress.Server{
|
|
Hostname: defServerName,
|
|
SSLCert: ingress.SSLCert{
|
|
PemFileName: defaultPemFileName,
|
|
PemSHA: defaultPemSHA,
|
|
},
|
|
Locations: []*ingress.Location{
|
|
{
|
|
Path: rootLocation,
|
|
IsDefBackend: true,
|
|
Backend: du.Name,
|
|
Proxy: ngxProxy,
|
|
Service: du.Service,
|
|
},
|
|
}}
|
|
|
|
// initialize all other servers
|
|
for _, ing := range data {
|
|
ingKey := k8s.MetaNamespaceKey(ing)
|
|
anns := ing.ParsedAnnotations
|
|
|
|
// default upstream name
|
|
un := du.Name
|
|
|
|
if ing.Spec.Backend != nil {
|
|
defUpstream := fmt.Sprintf("%v-%v-%v", ing.Namespace, ing.Spec.Backend.ServiceName, ing.Spec.Backend.ServicePort.String())
|
|
|
|
if backendUpstream, ok := upstreams[defUpstream]; ok {
|
|
// use backend specified in Ingress as the default backend for all its rules
|
|
un = backendUpstream.Name
|
|
|
|
// special "catch all" case, Ingress with a backend but no rule
|
|
defLoc := servers[defServerName].Locations[0]
|
|
if defLoc.IsDefBackend && len(ing.Spec.Rules) == 0 {
|
|
glog.Infof("Ingress %q defines a backend but no rule. Using it to configure the catch-all server %q",
|
|
ingKey, defServerName)
|
|
|
|
defLoc.IsDefBackend = false
|
|
defLoc.Backend = backendUpstream.Name
|
|
defLoc.Service = backendUpstream.Service
|
|
defLoc.Ingress = ing
|
|
|
|
// customize using Ingress annotations
|
|
defLoc.Logs = anns.Logs
|
|
defLoc.BasicDigestAuth = anns.BasicDigestAuth
|
|
defLoc.ClientBodyBufferSize = anns.ClientBodyBufferSize
|
|
defLoc.ConfigurationSnippet = anns.ConfigurationSnippet
|
|
defLoc.CorsConfig = anns.CorsConfig
|
|
defLoc.ExternalAuth = anns.ExternalAuth
|
|
defLoc.Proxy = anns.Proxy
|
|
defLoc.RateLimit = anns.RateLimit
|
|
// TODO: Redirect and rewrite can affect the catch all behavior, skip for now
|
|
// defLoc.Redirect = anns.Redirect
|
|
// defLoc.Rewrite = anns.Rewrite
|
|
defLoc.UpstreamVhost = anns.UpstreamVhost
|
|
defLoc.Whitelist = anns.Whitelist
|
|
defLoc.Denied = anns.Denied
|
|
defLoc.LuaRestyWAF = anns.LuaRestyWAF
|
|
defLoc.InfluxDB = anns.InfluxDB
|
|
defLoc.BackendProtocol = anns.BackendProtocol
|
|
defLoc.ModSecurity = anns.ModSecurity
|
|
} else {
|
|
glog.V(3).Infof("Ingress %q defines both a backend and rules. Using its backend as default upstream for all its rules.",
|
|
ingKey)
|
|
}
|
|
}
|
|
}
|
|
|
|
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: un,
|
|
Proxy: ngxProxy,
|
|
Service: &apiv1.Service{},
|
|
},
|
|
},
|
|
SSLPassthrough: anns.SSLPassthrough,
|
|
SSLCiphers: anns.SSLCiphers,
|
|
}
|
|
}
|
|
}
|
|
|
|
// configure default location, alias, and SSL
|
|
for _, ing := range data {
|
|
ingKey := k8s.MetaNamespaceKey(ing)
|
|
anns := ing.ParsedAnnotations
|
|
|
|
for _, rule := range ing.Spec.Rules {
|
|
host := rule.Host
|
|
if host == "" {
|
|
host = defServerName
|
|
}
|
|
|
|
if anns.Alias != "" {
|
|
if servers[host].Alias == "" {
|
|
servers[host].Alias = anns.Alias
|
|
if _, ok := aliases["Alias"]; !ok {
|
|
aliases["Alias"] = host
|
|
}
|
|
} else {
|
|
glog.Warningf("Aliases already configured for server %q, skipping (Ingress %q)",
|
|
host, ingKey)
|
|
}
|
|
}
|
|
|
|
if anns.ServerSnippet != "" {
|
|
if servers[host].ServerSnippet == "" {
|
|
servers[host].ServerSnippet = anns.ServerSnippet
|
|
} else {
|
|
glog.Warningf("Server snippet already configured for server %q, skipping (Ingress %q)",
|
|
host, ingKey)
|
|
}
|
|
}
|
|
|
|
// only add SSL ciphers if the server does not have them previously configured
|
|
if servers[host].SSLCiphers == "" && anns.SSLCiphers != "" {
|
|
servers[host].SSLCiphers = anns.SSLCiphers
|
|
}
|
|
|
|
// only add a certificate if the server does not have one previously configured
|
|
if servers[host].SSLCert.PemFileName != "" {
|
|
continue
|
|
}
|
|
|
|
if len(ing.Spec.TLS) == 0 {
|
|
glog.V(3).Infof("Ingress %q does not contains a TLS section.", ingKey)
|
|
continue
|
|
}
|
|
|
|
tlsSecretName := extractTLSSecretName(host, ing, n.store.GetLocalSSLCert)
|
|
|
|
if tlsSecretName == "" {
|
|
glog.V(3).Infof("Host %q is listed in the TLS section but secretName is empty. Using default certificate.", host)
|
|
servers[host].SSLCert.PemFileName = defaultPemFileName
|
|
servers[host].SSLCert.PemSHA = defaultPemSHA
|
|
continue
|
|
}
|
|
|
|
secrKey := fmt.Sprintf("%v/%v", ing.Namespace, tlsSecretName)
|
|
cert, err := n.store.GetLocalSSLCert(secrKey)
|
|
if err != nil {
|
|
glog.Warningf("Error getting SSL certificate %q: %v. Using default certificate", secrKey, err)
|
|
servers[host].SSLCert.PemFileName = defaultPemFileName
|
|
servers[host].SSLCert.PemSHA = defaultPemSHA
|
|
continue
|
|
}
|
|
|
|
err = cert.Certificate.VerifyHostname(host)
|
|
if err != nil {
|
|
glog.Warningf("Unexpected error validating SSL certificate %q for server %q: %v", secrKey, host, err)
|
|
glog.Warning("Validating certificate against DNS names. This will be deprecated in a future version.")
|
|
// check the Common Name field
|
|
// https://github.com/golang/go/issues/22922
|
|
err := verifyHostname(host, cert.Certificate)
|
|
if err != nil {
|
|
glog.Warningf("SSL certificate %q does not contain a Common Name or Subject Alternative Name for server %q: %v",
|
|
secrKey, host, err)
|
|
glog.Warningf("Using default certificate")
|
|
servers[host].SSLCert.PemFileName = defaultPemFileName
|
|
servers[host].SSLCert.PemSHA = defaultPemSHA
|
|
continue
|
|
}
|
|
}
|
|
|
|
if n.cfg.DynamicCertificatesEnabled {
|
|
// useless placeholders: just to shut up NGINX configuration loader errors:
|
|
cert.PemFileName = defaultPemFileName
|
|
cert.PemSHA = defaultPemSHA
|
|
}
|
|
|
|
servers[host].SSLCert = *cert
|
|
|
|
if cert.ExpireTime.Before(time.Now().Add(240 * time.Hour)) {
|
|
glog.Warningf("SSL certificate for server %q is about to expire (%v)", host, cert.ExpireTime)
|
|
}
|
|
}
|
|
}
|
|
|
|
for alias, host := range aliases {
|
|
if _, ok := servers[alias]; ok {
|
|
glog.Warningf("Conflicting hostname (%v) and alias (%v). Removing alias to avoid conflicts.", host, alias)
|
|
servers[host].Alias = ""
|
|
}
|
|
}
|
|
|
|
return servers
|
|
}
|
|
|
|
// Compares an Ingress of a potential alternative backend's rules with each existing server and finds matching host + path pairs.
|
|
// If a match is found, we know that this server should back the alternative backend and add the alternative backend
|
|
// to a backend's alternative list.
|
|
// If no match is found, then the serverless backend is deleted.
|
|
func mergeAlternativeBackends(ing *ingress.Ingress, upstreams map[string]*ingress.Backend,
|
|
servers map[string]*ingress.Server) {
|
|
|
|
// merge catch-all alternative backends
|
|
if ing.Spec.Backend != nil {
|
|
upsName := upstreamName(ing.Namespace, ing.Spec.Backend.ServiceName, ing.Spec.Backend.ServicePort)
|
|
|
|
ups := upstreams[upsName]
|
|
|
|
for _, defLoc := range servers[defServerName].Locations {
|
|
if !upstreams[defLoc.Backend].NoServer {
|
|
glog.Infof("matching backend %v found for alternative backend %v",
|
|
upstreams[defLoc.Backend].Name, ups.Name)
|
|
|
|
upstreams[defLoc.Backend].AlternativeBackends =
|
|
append(upstreams[defLoc.Backend].AlternativeBackends, ups.Name)
|
|
}
|
|
}
|
|
}
|
|
|
|
for _, rule := range ing.Spec.Rules {
|
|
for _, path := range rule.HTTP.Paths {
|
|
upsName := upstreamName(ing.Namespace, path.Backend.ServiceName, path.Backend.ServicePort)
|
|
|
|
ups := upstreams[upsName]
|
|
|
|
merged := false
|
|
|
|
server := servers[rule.Host]
|
|
|
|
// find matching paths
|
|
for _, location := range server.Locations {
|
|
if location.Backend == defUpstreamName {
|
|
continue
|
|
}
|
|
|
|
if location.Path == path.Path && !upstreams[location.Backend].NoServer {
|
|
glog.Infof("matching backend %v found for alternative backend %v",
|
|
upstreams[location.Backend].Name, ups.Name)
|
|
|
|
upstreams[location.Backend].AlternativeBackends =
|
|
append(upstreams[location.Backend].AlternativeBackends, ups.Name)
|
|
|
|
merged = true
|
|
}
|
|
}
|
|
|
|
if !merged {
|
|
glog.Warningf("unable to find real backend for alternative backend %v. Deleting.", ups.Name)
|
|
delete(upstreams, ups.Name)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// extractTLSSecretName returns the name of the Secret containing a SSL
|
|
// certificate for the given host name, or an empty string.
|
|
func extractTLSSecretName(host string, ing *ingress.Ingress,
|
|
getLocalSSLCert func(string) (*ingress.SSLCert, error)) string {
|
|
|
|
if ing == nil {
|
|
return ""
|
|
}
|
|
|
|
// naively return Secret name from TLS spec if host name matches
|
|
for _, tls := range ing.Spec.TLS {
|
|
if sets.NewString(tls.Hosts...).Has(host) {
|
|
return tls.SecretName
|
|
}
|
|
}
|
|
|
|
// no TLS host matching host name, try each TLS host for matching SAN or CN
|
|
for _, tls := range ing.Spec.TLS {
|
|
|
|
if tls.SecretName == "" {
|
|
// There's no secretName specified, so it will never be available
|
|
continue
|
|
}
|
|
|
|
secrKey := fmt.Sprintf("%v/%v", ing.Namespace, tls.SecretName)
|
|
|
|
cert, err := getLocalSSLCert(secrKey)
|
|
if err != nil {
|
|
glog.Warningf("Error getting SSL certificate %q: %v", secrKey, err)
|
|
continue
|
|
}
|
|
|
|
if cert == nil { // for tests
|
|
continue
|
|
}
|
|
|
|
err = cert.Certificate.VerifyHostname(host)
|
|
if err != nil {
|
|
continue
|
|
}
|
|
glog.V(3).Infof("Found SSL certificate matching host %q: %q", host, secrKey)
|
|
return tls.SecretName
|
|
}
|
|
|
|
return ""
|
|
}
|
|
|
|
// getRemovedHosts returns a list of the hostsnames
|
|
// that are not associated anymore to the NGINX configuration.
|
|
func getRemovedHosts(rucfg, newcfg *ingress.Configuration) []string {
|
|
old := sets.NewString()
|
|
new := sets.NewString()
|
|
|
|
for _, s := range rucfg.Servers {
|
|
if !old.Has(s.Hostname) {
|
|
old.Insert(s.Hostname)
|
|
}
|
|
}
|
|
|
|
for _, s := range newcfg.Servers {
|
|
if !new.Has(s.Hostname) {
|
|
new.Insert(s.Hostname)
|
|
}
|
|
}
|
|
|
|
return old.Difference(new).List()
|
|
}
|
|
|
|
func getRemovedIngresses(rucfg, newcfg *ingress.Configuration) []string {
|
|
oldIngresses := sets.NewString()
|
|
newIngresses := sets.NewString()
|
|
|
|
for _, server := range rucfg.Servers {
|
|
for _, location := range server.Locations {
|
|
if location.Ingress == nil {
|
|
continue
|
|
}
|
|
|
|
ingKey := k8s.MetaNamespaceKey(location.Ingress)
|
|
if !oldIngresses.Has(ingKey) {
|
|
oldIngresses.Insert(ingKey)
|
|
}
|
|
}
|
|
}
|
|
|
|
for _, server := range newcfg.Servers {
|
|
for _, location := range server.Locations {
|
|
if location.Ingress == nil {
|
|
continue
|
|
}
|
|
|
|
ingKey := k8s.MetaNamespaceKey(location.Ingress)
|
|
if !newIngresses.Has(ingKey) {
|
|
newIngresses.Insert(ingKey)
|
|
}
|
|
}
|
|
}
|
|
|
|
return oldIngresses.Difference(newIngresses).List()
|
|
}
|