/
controller.go
1276 lines (1079 loc) · 38.5 KB
/
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"
"sort"
"strconv"
"strings"
"time"
"github.com/golang/glog"
"github.com/mitchellh/hashstructure"
apiv1 "k8s.io/api/core/v1"
extensions "k8s.io/api/extensions/v1beta1"
"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/proxy"
ngx_config "k8s.io/ingress-nginx/internal/ingress/controller/config"
"k8s.io/ingress-nginx/internal/k8s"
)
const (
defUpstreamName = "upstream-default-backend"
defServerName = "_"
rootLocation = "/"
)
// Configuration contains all the settings required by an Ingress controller
type Configuration struct {
APIServerHost string
KubeConfigFile string
Client clientset.Interface
ResyncPeriod time.Duration
ConfigMapName string
DefaultService string
Namespace string
ForceNamespaceIsolation bool
// +optional
TCPConfigMapName string
// +optional
UDPConfigMapName string
DefaultHealthzURL string
HealthCheckTimeout time.Duration
DefaultSSLCertificate string
// +optional
PublishService string
PublishStatusAddress string
UpdateStatus bool
UseNodeInternalIP bool
ElectionID string
UpdateStatusOnShutdown bool
SortBackends bool
ListenPorts *ngx_config.ListenPorts
EnableSSLPassthrough bool
EnableProfiling bool
EnableSSLChainCompletion bool
FakeCertificatePath string
FakeCertificateSHA string
SyncRateLimit float32
DynamicCertificatesEnabled bool
}
// 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
}
// sort Ingresses using the ResourceVersion field
ings := n.store.ListIngresses()
sort.SliceStable(ings, func(i, j int) bool {
ir := ings[i].ResourceVersion
jr := ings[j].ResourceVersion
return ir < jr
})
upstreams, servers := n.getBackendServers(ings)
var passUpstreams []*ingress.SSLPassthroughBackend
hosts := sets.NewString()
for _, server := range servers {
if !hosts.Has(server.Hostname) {
hosts.Insert(server.Hostname)
}
if !server.SSLPassthrough {
continue
}
for _, loc := range server.Locations {
if loc.Path != rootLocation {
glog.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
}
}
pcfg := &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,
}
if n.runningConfig.Equal(pcfg) {
glog.V(3).Infof("No configuration change detected, skipping backend reload.")
return nil
}
if !n.IsDynamicConfigurationEnough(pcfg) {
glog.Infof("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)
glog.Errorf("Unexpected failure reloading the backend:\n%v", err)
return err
}
n.metricCollector.SetHosts(hosts)
glog.Infof("Backend successfully reloaded.")
n.metricCollector.ConfigSuccess(hash, true)
n.metricCollector.IncReloadCount()
n.metricCollector.SetSSLExpireTime(servers)
}
isFirstSync := n.runningConfig.Equal(&ingress.Configuration{})
if isFirstSync {
// For the initial sync it always takes some time for NGINX to
// start listening on the configured port (default 18080)
// For large configurations it might take a while so we loop
// and back off
glog.Info("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 := configureDynamically(pcfg, n.cfg.ListenPorts.Status, n.cfg.DynamicCertificatesEnabled)
if err == nil {
glog.V(2).Infof("Dynamic reconfiguration succeeded.")
return true, nil
}
glog.Warningf("Dynamic reconfiguration failed: %v", err)
return false, err
})
if err != nil {
glog.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
}
func (n *NGINXController) getStreamServices(configmapName string, proto apiv1.Protocol) []ingress.L4Service {
if configmapName == "" {
return []ingress.L4Service{}
}
glog.V(3).Infof("Obtaining information about %v stream services from ConfigMap %q", proto, configmapName)
_, _, err := k8s.ParseNameNS(configmapName)
if err != nil {
glog.Errorf("Error parsing ConfigMap reference %q: %v", configmapName, err)
return []ingress.L4Service{}
}
configmap, err := n.store.GetConfigMap(configmapName)
if err != nil {
glog.Errorf("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.Status,
n.cfg.ListenPorts.Health,
n.cfg.ListenPorts.Default,
}
reserverdPorts := 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)
if err != nil {
glog.Warningf("%q is not a valid %v port number", port, proto)
continue
}
if reserverdPorts.Has(externalPort) {
glog.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 {
glog.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 {
glog.Warningf("%v", err)
continue
}
svc, err := n.store.GetService(nsName)
if err != nil {
glog.Warningf("Error getting Service %q: %v", nsName, err)
continue
}
var endps []ingress.Endpoint
targetPort, err := strconv.Atoi(svcPort)
if err != nil {
// not a port number, fall back to using port name
glog.V(3).Infof("Searching Endpoints with %v port name %q for Service %q", proto, svcPort, nsName)
for _, sp := range svc.Spec.Ports {
if sp.Name == svcPort {
if sp.Protocol == proto {
endps = getEndpoints(svc, &sp, proto, n.store.GetServiceEndpoints)
break
}
}
}
} else {
glog.V(3).Infof("Searching Endpoints with %v port number %d for Service %q", proto, targetPort, nsName)
for _, sp := range svc.Spec.Ports {
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 {
glog.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,
})
}
// 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 {
glog.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 {
glog.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
}
// 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)
for _, ing := range ingresses {
ingKey := k8s.MetaNamespaceKey(ing)
anns := ing.ParsedAnnotations
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 %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 == "" {
glog.V(3).Infof("Secret %q has no 'ca.crt' key, mutual authentication disabled for Ingress %q",
server.CertificateAuth.Secret, ingKey)
}
} else {
glog.V(3).Infof("Server %q is already configured for mutual authentication (Ingress %q)",
server.Hostname, ingKey)
}
if rule.HTTP == nil {
glog.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 {
addLoc = false
if !loc.IsDefBackend {
glog.V(3).Infof("Location %q already configured for server %q with upstream %q (Ingress %q)",
loc.Path, server.Hostname, loc.Backend, ingKey)
break
}
glog.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
loc.BasicDigestAuth = anns.BasicDigestAuth
loc.ClientBodyBufferSize = anns.ClientBodyBufferSize
loc.ConfigurationSnippet = anns.ConfigurationSnippet
loc.CorsConfig = anns.CorsConfig
loc.ExternalAuth = anns.ExternalAuth
loc.Proxy = anns.Proxy
loc.RateLimit = anns.RateLimit
loc.Redirect = anns.Redirect
loc.Rewrite = anns.Rewrite
loc.UpstreamVhost = anns.UpstreamVhost
loc.Whitelist = anns.Whitelist
loc.Denied = anns.Denied
loc.XForwardedPrefix = anns.XForwardedPrefix
loc.UsePortInRedirects = anns.UsePortInRedirects
loc.Connection = anns.Connection
loc.Logs = anns.Logs
loc.LuaRestyWAF = anns.LuaRestyWAF
loc.InfluxDB = anns.InfluxDB
loc.DefaultBackend = anns.DefaultBackend
loc.BackendProtocol = anns.BackendProtocol
loc.CustomHTTPErrors = anns.CustomHTTPErrors
loc.ModSecurity = anns.ModSecurity
if loc.Redirect.FromToWWW {
server.RedirectFromToWWW = true
}
break
}
}
// new location
if addLoc {
glog.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,
Backend: ups.Name,
IsDefBackend: false,
Service: ups.Service,
Port: ups.Port,
Ingress: ing,
BasicDigestAuth: anns.BasicDigestAuth,
ClientBodyBufferSize: anns.ClientBodyBufferSize,
ConfigurationSnippet: anns.ConfigurationSnippet,
CorsConfig: anns.CorsConfig,
ExternalAuth: anns.ExternalAuth,
Proxy: anns.Proxy,
RateLimit: anns.RateLimit,
Redirect: anns.Redirect,
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,