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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"
"sort"
"strconv"
"strings"
"time"
"github.com/mitchellh/hashstructure"
apiv1 "k8s.io/api/core/v1"
networking "k8s.io/api/networking/v1beta1"
apiequality "k8s.io/apimachinery/pkg/api/equality"
"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/ingress-nginx/internal/ingress"
"k8s.io/ingress-nginx/internal/ingress/annotations"
"k8s.io/ingress-nginx/internal/ingress/annotations/class"
"k8s.io/ingress-nginx/internal/ingress/annotations/log"
"k8s.io/ingress-nginx/internal/ingress/annotations/parser"
"k8s.io/ingress-nginx/internal/ingress/annotations/proxy"
ngx_config "k8s.io/ingress-nginx/internal/ingress/controller/config"
"k8s.io/ingress-nginx/internal/ingress/controller/store"
"k8s.io/ingress-nginx/internal/ingress/errors"
"k8s.io/ingress-nginx/internal/k8s"
"k8s.io/ingress-nginx/internal/nginx"
"k8s.io/klog/v2"
)
const (
defUpstreamName = "upstream-default-backend"
defServerName = "_"
rootLocation = "/"
)
// Configuration contains all the settings required by an Ingress controller
type Configuration struct {
APIServerHost string
RootCAFile string
KubeConfigFile string
Client clientset.Interface
ResyncPeriod time.Duration
ConfigMapName string
DefaultService string
Namespace string
// +optional
TCPConfigMapName string
// +optional
UDPConfigMapName string
DefaultSSLCertificate string
// +optional
PublishService string
PublishStatusAddress string
UpdateStatus bool
UseNodeInternalIP bool
ElectionID string
UpdateStatusOnShutdown bool
ListenPorts *ngx_config.ListenPorts
DisableServiceExternalName bool
EnableSSLPassthrough bool
EnableProfiling bool
EnableMetrics bool
MetricsPerHost bool
FakeCertificate *ingress.SSLCert
SyncRateLimit float32
DisableCatchAll bool
ValidationWebhook string
ValidationWebhookCertPath string
ValidationWebhookKeyPath string
GlobalExternalAuth *ngx_config.GlobalExternalAuth
MaxmindEditionFiles *[]string
MonitorMaxBatchSize int
ShutdownGracePeriod int
}
// GetPublishService returns the Service used to set the load-balancer status of Ingresses.
func (n NGINXController) GetPublishService() *apiv1.Service {
s, err := n.store.GetService(n.cfg.PublishService)
if err != nil {
return nil
}
return s
}
// syncIngress collects all the pieces required to assemble the NGINX
// configuration file and passes the resulting data structures to the backend
// (OnUpdate) when a reload is deemed necessary.
func (n *NGINXController) syncIngress(interface{}) error {
n.syncRateLimiter.Accept()
if n.syncQueue.IsShuttingDown() {
return nil
}
ings := n.store.ListIngresses()
hosts, servers, pcfg := n.getConfiguration(ings)
n.metricCollector.SetSSLExpireTime(servers)
if n.runningConfig.Equal(pcfg) {
klog.V(3).Infof("No configuration change detected, skipping backend reload")
return nil
}
n.metricCollector.SetHosts(hosts)
if !n.IsDynamicConfigurationEnough(pcfg) {
klog.InfoS("Configuration changes detected, backend reload required")
hash, _ := hashstructure.Hash(pcfg, &hashstructure.HashOptions{
TagName: "json",
})
pcfg.ConfigurationChecksum = fmt.Sprintf("%v", hash)
err := n.OnUpdate(*pcfg)
if err != nil {
n.metricCollector.IncReloadErrorCount()
n.metricCollector.ConfigSuccess(hash, false)
klog.Errorf("Unexpected failure reloading the backend:\n%v", err)
n.recorder.Eventf(k8s.IngressPodDetails, apiv1.EventTypeWarning, "RELOAD", fmt.Sprintf("Error reloading NGINX: %v", err))
return err
}
klog.InfoS("Backend successfully reloaded")
n.metricCollector.ConfigSuccess(hash, true)
n.metricCollector.IncReloadCount()
n.recorder.Eventf(k8s.IngressPodDetails, apiv1.EventTypeNormal, "RELOAD", "NGINX reload triggered due to a change in configuration")
}
isFirstSync := n.runningConfig.Equal(&ingress.Configuration{})
if isFirstSync {
// For the initial sync it always takes some time for NGINX to start listening
// For large configurations it might take a while so we loop and back off
klog.InfoS("Initial sync, sleeping for 1 second")
time.Sleep(1 * time.Second)
}
retry := wait.Backoff{
Steps: 15,
Duration: 1 * time.Second,
Factor: 0.8,
Jitter: 0.1,
}
err := wait.ExponentialBackoff(retry, func() (bool, error) {
err := n.configureDynamically(pcfg)
if err == nil {
klog.V(2).Infof("Dynamic reconfiguration succeeded.")
return true, nil
}
klog.Warningf("Dynamic reconfiguration failed: %v", err)
return false, err
})
if err != nil {
klog.Errorf("Unexpected failure reconfiguring NGINX:\n%v", err)
return err
}
ri := getRemovedIngresses(n.runningConfig, pcfg)
re := getRemovedHosts(n.runningConfig, pcfg)
n.metricCollector.RemoveMetrics(ri, re)
n.runningConfig = pcfg
return nil
}
// CheckIngress returns an error in case the provided ingress, when added
// to the current configuration, generates an invalid configuration
func (n *NGINXController) CheckIngress(ing *networking.Ingress) error {
if ing == nil {
// no ingress to add, no state change
return nil
}
// Skip checks if the ingress is marked as deleted
if !ing.DeletionTimestamp.IsZero() {
return nil
}
if !class.IsValid(ing) {
klog.Warningf("ignoring ingress %v in %v based on annotation %v", ing.Name, ing.ObjectMeta.Namespace, class.IngressKey)
return nil
}
if n.cfg.Namespace != "" && ing.ObjectMeta.Namespace != n.cfg.Namespace {
klog.Warningf("ignoring ingress %v in namespace %v different from the namespace watched %s", ing.Name, ing.ObjectMeta.Namespace, n.cfg.Namespace)
return nil
}
if n.cfg.DisableCatchAll && ing.Spec.Backend != nil {
return fmt.Errorf("This deployment is trying to create a catch-all ingress while DisableCatchAll flag is set to true. Remove '.spec.backend' or set DisableCatchAll flag to false.")
}
cfg := n.store.GetBackendConfiguration()
cfg.Resolver = n.resolver
for key := range ing.ObjectMeta.GetAnnotations() {
if parser.AnnotationsPrefix != parser.DefaultAnnotationsPrefix {
if strings.HasPrefix(key, fmt.Sprintf("%s/", parser.DefaultAnnotationsPrefix)) {
return fmt.Errorf("This deployment has a custom annotation prefix defined. Use '%s' instead of '%s'", parser.AnnotationsPrefix, parser.DefaultAnnotationsPrefix)
}
}
if !cfg.EnableSnippetDirectives && strings.HasSuffix(key, "-snippet") {
return fmt.Errorf("%s annotation cannot be used. Snippet directives are disabled by the Ingress administrator", key)
}
if len(cfg.GlobalRateLimitMemcachedHost) == 0 && strings.HasPrefix(key, fmt.Sprintf("%s/%s", parser.AnnotationsPrefix, "global-rate-limit")) {
return fmt.Errorf("'global-rate-limit*' annotations require 'global-rate-limit-memcached-host' settings configured in the global configmap")
}
}
k8s.SetDefaultNGINXPathType(ing)
allIngresses := n.store.ListIngresses()
filter := func(toCheck *ingress.Ingress) bool {
return toCheck.ObjectMeta.Namespace == ing.ObjectMeta.Namespace &&
toCheck.ObjectMeta.Name == ing.ObjectMeta.Name
}
ings := store.FilterIngresses(allIngresses, filter)
ings = append(ings, &ingress.Ingress{
Ingress: *ing,
ParsedAnnotations: annotations.NewAnnotationExtractor(n.store).Extract(ing),
})
_, servers, pcfg := n.getConfiguration(ings)
err := checkOverlap(ing, allIngresses, servers)
if err != nil {
n.metricCollector.IncCheckErrorCount(ing.ObjectMeta.Namespace, ing.Name)
return err
}
content, err := n.generateTemplate(cfg, *pcfg)
if err != nil {
n.metricCollector.IncCheckErrorCount(ing.ObjectMeta.Namespace, ing.Name)
return err
}
err = n.testTemplate(content)
if err != nil {
n.metricCollector.IncCheckErrorCount(ing.ObjectMeta.Namespace, ing.Name)
return err
}
n.metricCollector.IncCheckCount(ing.ObjectMeta.Namespace, ing.Name)
return nil
}
func (n *NGINXController) getStreamServices(configmapName string, proto apiv1.Protocol) []ingress.L4Service {
if configmapName == "" {
return []ingress.L4Service{}
}
klog.V(3).Infof("Obtaining information about %v stream services from ConfigMap %q", proto, configmapName)
_, _, err := k8s.ParseNameNS(configmapName)
if err != nil {
klog.Warningf("Error parsing ConfigMap reference %q: %v", configmapName, err)
return []ingress.L4Service{}
}
configmap, err := n.store.GetConfigMap(configmapName)
if err != nil {
klog.Warningf("Error getting ConfigMap %q: %v", configmapName, err)
return []ingress.L4Service{}
}
var svcs []ingress.L4Service
var svcProxyProtocol ingress.ProxyProtocol
rp := []int{
n.cfg.ListenPorts.HTTP,
n.cfg.ListenPorts.HTTPS,
n.cfg.ListenPorts.SSLProxy,
n.cfg.ListenPorts.Health,
n.cfg.ListenPorts.Default,
nginx.ProfilerPort,
nginx.StatusPort,
nginx.StreamPort,
}
reservedPorts := sets.NewInt(rp...)
// svcRef format: <(str)namespace>/<(str)service>:<(intstr)port>[:<("PROXY")decode>:<("PROXY")encode>]
for port, svcRef := range configmap.Data {
externalPort, err := strconv.Atoi(port) // #nosec
if err != nil {
klog.Warningf("%q is not a valid %v port number", port, proto)
continue
}
if reservedPorts.Has(externalPort) {
klog.Warningf("Port %d cannot be used for %v stream services. It is reserved for the Ingress controller.", externalPort, proto)
continue
}
nsSvcPort := strings.Split(svcRef, ":")
if len(nsSvcPort) < 2 {
klog.Warningf("Invalid Service reference %q for %v port %d", svcRef, proto, externalPort)
continue
}
nsName := nsSvcPort[0]
svcPort := nsSvcPort[1]
svcProxyProtocol.Decode = false
svcProxyProtocol.Encode = false
// Proxy Protocol is only compatible with TCP Services
if len(nsSvcPort) >= 3 && proto == apiv1.ProtocolTCP {
if len(nsSvcPort) >= 3 && strings.ToUpper(nsSvcPort[2]) == "PROXY" {
svcProxyProtocol.Decode = true
}
if len(nsSvcPort) == 4 && strings.ToUpper(nsSvcPort[3]) == "PROXY" {
svcProxyProtocol.Encode = true
}
}
svcNs, svcName, err := k8s.ParseNameNS(nsName)
if err != nil {
klog.Warningf("%v", err)
continue
}
svc, err := n.store.GetService(nsName)
if err != nil {
klog.Warningf("Error getting Service %q: %v", nsName, err)
continue
}
var endps []ingress.Endpoint
/* #nosec */
targetPort, err := strconv.Atoi(svcPort) // #nosec
if err != nil {
// not a port number, fall back to using port name
klog.V(3).Infof("Searching Endpoints with %v port name %q for Service %q", proto, svcPort, nsName)
for i := range svc.Spec.Ports {
sp := svc.Spec.Ports[i]
if sp.Name == svcPort {
if sp.Protocol == proto {
endps = getEndpoints(svc, &sp, proto, n.store.GetServiceEndpoints)
break
}
}
}
} else {
klog.V(3).Infof("Searching Endpoints with %v port number %d for Service %q", proto, targetPort, nsName)
for i := range svc.Spec.Ports {
sp := svc.Spec.Ports[i]
if sp.Port == int32(targetPort) {
if sp.Protocol == proto {
endps = getEndpoints(svc, &sp, proto, n.store.GetServiceEndpoints)
break
}
}
}
}
// stream services cannot contain empty upstreams and there is
// no default backend equivalent
if len(endps) == 0 {
klog.Warningf("Service %q does not have any active Endpoint for %v port %v", nsName, proto, svcPort)
continue
}
svcs = append(svcs, ingress.L4Service{
Port: externalPort,
Backend: ingress.L4Backend{
Name: svcName,
Namespace: svcNs,
Port: intstr.FromString(svcPort),
Protocol: proto,
ProxyProtocol: svcProxyProtocol,
},
Endpoints: endps,
Service: svc,
})
}
// Keep upstream order sorted to reduce unnecessary nginx config reloads.
sort.SliceStable(svcs, func(i, j int) bool {
return svcs[i].Port < svcs[j].Port
})
return svcs
}
// getDefaultUpstream returns the upstream associated with the default backend.
// Configures the upstream to return HTTP code 503 in case of error.
func (n *NGINXController) getDefaultUpstream() *ingress.Backend {
upstream := &ingress.Backend{
Name: defUpstreamName,
}
svcKey := n.cfg.DefaultService
if len(svcKey) == 0 {
upstream.Endpoints = append(upstream.Endpoints, n.DefaultEndpoint())
return upstream
}
svc, err := n.store.GetService(svcKey)
if err != nil {
klog.Warningf("Error getting default backend %q: %v", svcKey, err)
upstream.Endpoints = append(upstream.Endpoints, n.DefaultEndpoint())
return upstream
}
endps := getEndpoints(svc, &svc.Spec.Ports[0], apiv1.ProtocolTCP, n.store.GetServiceEndpoints)
if len(endps) == 0 {
klog.Warningf("Service %q does not have any active Endpoint", svcKey)
endps = []ingress.Endpoint{n.DefaultEndpoint()}
}
upstream.Service = svc
upstream.Endpoints = append(upstream.Endpoints, endps...)
return upstream
}
// getConfiguration returns the configuration matching the standard kubernetes ingress
func (n *NGINXController) getConfiguration(ingresses []*ingress.Ingress) (sets.String, []*ingress.Server, *ingress.Configuration) {
upstreams, servers := n.getBackendServers(ingresses)
var passUpstreams []*ingress.SSLPassthroughBackend
hosts := sets.NewString()
for _, server := range servers {
// If a location is defined by a prefix string that ends with the slash character, and requests are processed by one of
// proxy_pass, fastcgi_pass, uwsgi_pass, scgi_pass, memcached_pass, or grpc_pass, then the special processing is performed.
// In response to a request with URI equal to // this string, but without the trailing slash, a permanent redirect with the
// code 301 will be returned to the requested URI with the slash appended. If this is not desired, an exact match of the
// URIand location could be defined like this:
//
// location /user/ {
// proxy_pass http://user.example.com;
// }
// location = /user {
// proxy_pass http://login.example.com;
// }
server.Locations = updateServerLocations(server.Locations)
if !hosts.Has(server.Hostname) {
hosts.Insert(server.Hostname)
}
for _, alias := range server.Aliases {
if !hosts.Has(alias) {
hosts.Insert(alias)
}
}
if !server.SSLPassthrough {
continue
}
for _, loc := range server.Locations {
if loc.Path != rootLocation {
klog.Warningf("Ignoring SSL Passthrough for location %q in server %q", loc.Path, server.Hostname)
continue
}
passUpstreams = append(passUpstreams, &ingress.SSLPassthroughBackend{
Backend: loc.Backend,
Hostname: server.Hostname,
Service: loc.Service,
Port: loc.Port,
})
break
}
}
return hosts, servers, &ingress.Configuration{
Backends: upstreams,
Servers: servers,
TCPEndpoints: n.getStreamServices(n.cfg.TCPConfigMapName, apiv1.ProtocolTCP),
UDPEndpoints: n.getStreamServices(n.cfg.UDPConfigMapName, apiv1.ProtocolUDP),
PassthroughBackends: passUpstreams,
BackendConfigChecksum: n.store.GetBackendConfiguration().Checksum,
DefaultSSLCertificate: n.getDefaultSSLCertificate(),
}
}
func dropSnippetDirectives(anns *annotations.Ingress, ingKey string) {
if anns != nil {
if anns.ConfigurationSnippet != "" {
klog.V(3).Infof("Ingress %q tried to use configuration-snippet and the annotation is disabled by the admin. Removing the annotation", ingKey)
anns.ConfigurationSnippet = ""
}
if anns.ServerSnippet != "" {
klog.V(3).Infof("Ingress %q tried to use server-snippet and the annotation is disabled by the admin. Removing the annotation", ingKey)
anns.ServerSnippet = ""
}
if anns.ModSecurity.Snippet != "" {
klog.V(3).Infof("Ingress %q tried to use modsecurity-snippet and the annotation is disabled by the admin. Removing the annotation", ingKey)
anns.ModSecurity.Snippet = ""
}
if anns.ExternalAuth.AuthSnippet != "" {
klog.V(3).Infof("Ingress %q tried to use auth-snippet and the annotation is disabled by the admin. Removing the annotation", ingKey)
anns.ExternalAuth.AuthSnippet = ""
}
}
}
// 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 (n *NGINXController) getBackendServers(ingresses []*ingress.Ingress) ([]*ingress.Backend, []*ingress.Server) {
du := n.getDefaultUpstream()
upstreams := n.createUpstreams(ingresses, du)
servers := n.createServers(ingresses, upstreams, du)
var canaryIngresses []*ingress.Ingress
for _, ing := range ingresses {
ingKey := k8s.MetaNamespaceKey(ing)
anns := ing.ParsedAnnotations
if !n.store.GetBackendConfiguration().EnableSnippetDirectives {
dropSnippetDirectives(anns, ingKey)
}
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 {
klog.V(3).Infof("Ingress %q does not contain any HTTP rule, using default backend", ingKey)
continue
}
if server.AuthTLSError == "" && anns.CertificateAuth.AuthTLSError != "" {
server.AuthTLSError = anns.CertificateAuth.AuthTLSError
}
if server.CertificateAuth.CAFileName == "" {
server.CertificateAuth = anns.CertificateAuth
if server.CertificateAuth.Secret != "" && server.CertificateAuth.CAFileName == "" {
klog.V(3).Infof("Secret %q has no 'ca.crt' key, mutual authentication disabled for Ingress %q",
server.CertificateAuth.Secret, ingKey)
}
} else {
klog.V(3).Infof("Server %q is already configured for mutual authentication (Ingress %q)",
server.Hostname, ingKey)
}
if !n.store.GetBackendConfiguration().ProxySSLLocationOnly {
if server.ProxySSL.CAFileName == "" {
server.ProxySSL = anns.ProxySSL
if server.ProxySSL.Secret != "" && server.ProxySSL.CAFileName == "" {
klog.V(3).Infof("Secret %q has no 'ca.crt' key, client cert authentication disabled for Ingress %q",
server.ProxySSL.Secret, ingKey)
}
} else {
klog.V(3).Infof("Server %q is already configured for client cert authentication (Ingress %q)",
server.Hostname, ingKey)
}
}
if rule.HTTP == nil {
klog.V(3).Infof("Ingress %q does not contain any HTTP rule, using default backend", ingKey)
continue
}
for _, path := range rule.HTTP.Paths {
upsName := upstreamName(ing.Namespace, path.Backend.ServiceName, path.Backend.ServicePort)
ups := upstreams[upsName]
// Backend is not referenced to by a server
if ups.NoServer {
continue
}
nginxPath := rootLocation
if path.Path != "" {
nginxPath = path.Path
}
addLoc := true
for _, loc := range server.Locations {
if loc.Path != nginxPath {
continue
}
// Same paths but different types are allowed
// (same type means overlap in the path definition)
if !apiequality.Semantic.DeepEqual(loc.PathType, path.PathType) {
break
}
addLoc = false
if !loc.IsDefBackend {
klog.V(3).Infof("Location %q already configured for server %q with upstream %q (Ingress %q)",
loc.Path, server.Hostname, loc.Backend, ingKey)
break
}
klog.V(3).Infof("Replacing location %q for server %q with upstream %q to use upstream %q (Ingress %q)",
loc.Path, server.Hostname, loc.Backend, ups.Name, ingKey)
loc.Backend = ups.Name
loc.IsDefBackend = false
loc.Port = ups.Port
loc.Service = ups.Service
loc.Ingress = ing
locationApplyAnnotations(loc, anns)
if loc.Redirect.FromToWWW {
server.RedirectFromToWWW = true
}
break
}
// new location
if addLoc {
klog.V(3).Infof("Adding location %q for server %q with upstream %q (Ingress %q)",
nginxPath, server.Hostname, ups.Name, ingKey)
loc := &ingress.Location{
Path: nginxPath,
PathType: path.PathType,
Backend: ups.Name,
IsDefBackend: false,
Service: ups.Service,
Port: ups.Port,
Ingress: ing,
}
locationApplyAnnotations(loc, anns)
if loc.Redirect.FromToWWW {
server.RedirectFromToWWW = true
}
server.Locations = append(server.Locations, loc)
}
if ups.SessionAffinity.AffinityType == "" {
ups.SessionAffinity.AffinityType = anns.SessionAffinity.Type
}
if ups.SessionAffinity.AffinityMode == "" {
ups.SessionAffinity.AffinityMode = anns.SessionAffinity.Mode
}
if anns.SessionAffinity.Type == "cookie" {
cookiePath := anns.SessionAffinity.Cookie.Path
if anns.Rewrite.UseRegex && cookiePath == "" {
klog.Warningf("session-cookie-path should be set when use-regex is true")
}
ups.SessionAffinity.CookieSessionAffinity.Name = anns.SessionAffinity.Cookie.Name
ups.SessionAffinity.CookieSessionAffinity.Expires = anns.SessionAffinity.Cookie.Expires
ups.SessionAffinity.CookieSessionAffinity.MaxAge = anns.SessionAffinity.Cookie.MaxAge
ups.SessionAffinity.CookieSessionAffinity.Path = cookiePath
ups.SessionAffinity.CookieSessionAffinity.SameSite = anns.SessionAffinity.Cookie.SameSite
ups.SessionAffinity.CookieSessionAffinity.ConditionalSameSiteNone = anns.SessionAffinity.Cookie.ConditionalSameSiteNone
ups.SessionAffinity.CookieSessionAffinity.ChangeOnFailure = anns.SessionAffinity.Cookie.ChangeOnFailure
locs := ups.SessionAffinity.CookieSessionAffinity.Locations
if _, ok := locs[host]; !ok {
locs[host] = []string{}
}
locs[host] = append(locs[host], path.Path)
if len(server.Aliases) > 0 {
for _, alias := range server.Aliases {
if _, ok := locs[alias]; !ok {
locs[alias] = []string{}
}
locs[alias] = append(locs[alias], path.Path)
}
}
}
}
}
// set aside canary ingresses to merge later
if anns.Canary.Enabled {
canaryIngresses = append(canaryIngresses, ing)
}
}
if nonCanaryIngressExists(ingresses, canaryIngresses) {
for _, canaryIng := range canaryIngresses {
mergeAlternativeBackends(canaryIng, upstreams, servers)
}
}
aUpstreams := make([]*ingress.Backend, 0, len(upstreams))
for _, upstream := range upstreams {
aUpstreams = append(aUpstreams, upstream)
if upstream.Name == defUpstreamName {
continue
}
isHTTPSfrom := []*ingress.Server{}
for _, server := range servers {
for _, location := range server.Locations {
// use default backend
if !shouldCreateUpstreamForLocationDefaultBackend(upstream, location) {
continue
}
if len(location.DefaultBackend.Spec.Ports) == 0 {
klog.Errorf("Custom default backend service %v/%v has no ports. Ignoring", location.DefaultBackend.Namespace, location.DefaultBackend.Name)
continue
}
sp := location.DefaultBackend.Spec.Ports[0]
endps := getEndpoints(location.DefaultBackend, &sp, apiv1.ProtocolTCP, n.store.GetServiceEndpoints)
// custom backend is valid only if contains at least one endpoint
if len(endps) > 0 {
name := fmt.Sprintf("custom-default-backend-%v-%v", location.DefaultBackend.GetNamespace(), location.DefaultBackend.GetName())
klog.V(3).Infof("Creating \"%v\" upstream based on default backend annotation", name)
nb := upstream.DeepCopy()
nb.Name = name
nb.Endpoints = endps
aUpstreams = append(aUpstreams, nb)
location.DefaultBackendUpstreamName = name
if len(upstream.Endpoints) == 0 {
klog.V(3).Infof("Upstream %q has no active Endpoint, so using custom default backend for location %q in server %q (Service \"%v/%v\")",
upstream.Name, location.Path, server.Hostname, location.DefaultBackend.Namespace, location.DefaultBackend.Name)
location.Backend = name
}
}
if server.SSLPassthrough {
if location.Path == rootLocation {
if location.Backend == defUpstreamName {
klog.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
ingKey := k8s.MetaNamespaceKey(ing)
if !n.store.GetBackendConfiguration().EnableSnippetDirectives {
dropSnippetDirectives(anns, ingKey)
}
var defBackend string
if ing.Spec.Backend != nil {
defBackend = upstreamName(ing.Namespace, ing.Spec.Backend.ServiceName, ing.Spec.Backend.ServicePort)
klog.V(3).Infof("Creating upstream %q", defBackend)
upstreams[defBackend] = newUpstream(defBackend)
upstreams[defBackend].UpstreamHashBy.UpstreamHashBy = anns.UpstreamHashBy.UpstreamHashBy
upstreams[defBackend].UpstreamHashBy.UpstreamHashBySubset = anns.UpstreamHashBy.UpstreamHashBySubset
upstreams[defBackend].UpstreamHashBy.UpstreamHashBySubsetSize = anns.UpstreamHashBy.UpstreamHashBySubsetSize
upstreams[defBackend].LoadBalancing = anns.LoadBalancing
if upstreams[defBackend].LoadBalancing == "" {
upstreams[defBackend].LoadBalancing = n.store.GetBackendConfiguration().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 {
klog.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,
HeaderValue: anns.Canary.HeaderValue,
HeaderPattern: anns.Canary.HeaderPattern,
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 {
klog.Warningf("Error creating upstream %q: %v", defBackend, err)
}
}
s, err := n.store.GetService(svcKey)
if err != nil {
klog.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
}
klog.V(3).Infof("Creating upstream %q", name)
upstreams[name] = newUpstream(name)
upstreams[name].Port = path.Backend.ServicePort
upstreams[name].UpstreamHashBy.UpstreamHashBy = anns.UpstreamHashBy.UpstreamHashBy
upstreams[name].UpstreamHashBy.UpstreamHashBySubset = anns.UpstreamHashBy.UpstreamHashBySubset
upstreams[name].UpstreamHashBy.UpstreamHashBySubsetSize = anns.UpstreamHashBy.UpstreamHashBySubsetSize
upstreams[name].LoadBalancing = anns.LoadBalancing
if upstreams[name].LoadBalancing == "" {
upstreams[name].LoadBalancing = n.store.GetBackendConfiguration().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 {
klog.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,
HeaderValue: anns.Canary.HeaderValue,
HeaderPattern: anns.Canary.HeaderPattern,
Cookie: anns.Canary.Cookie,
}
}
if len(upstreams[name].Endpoints) == 0 {
endp, err := n.serviceEndpoints(svcKey, path.Backend.ServicePort.String())
if err != nil {
klog.Warningf("Error obtaining Endpoints for Service %q: %v", svcKey, err)
continue
}
upstreams[name].Endpoints = endp
}
s, err := n.store.GetService(svcKey)
if err != nil {
klog.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 *networking.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) {
var upstreams []ingress.Endpoint
svc, err := n.store.GetService(svcKey)
if err != nil {
return upstreams, err
}
klog.V(3).Infof("Obtaining ports information for Service %q", svcKey)
// Ingress with an ExternalName Service and no port defined for that Service