2ca265ae3b
All the distros that use this have been updated, or have PRs out to update them, or owners have been asked to fix RPMs. Removing this prevents further use of this model. Remove now dead code: EtcdClientOrDie Remove now dead pkg/proxy/config/etcd.go. Remove unused imports.
122 lines
4.0 KiB
Go
122 lines
4.0 KiB
Go
/*
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Copyright 2014 Google Inc. All rights reserved.
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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 app does all of the work necessary to configure and run a
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// Kubernetes app process.
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package app
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import (
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"net"
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"net/http"
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"strconv"
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"time"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/client"
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_ "github.com/GoogleCloudPlatform/kubernetes/pkg/healthz"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/proxy"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/proxy/config"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/util/exec"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/util/iptables"
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"github.com/golang/glog"
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"github.com/spf13/pflag"
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)
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// ProxyServer contains configures and runs a Kubernetes proxy server
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type ProxyServer struct {
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BindAddress util.IP
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ClientConfig client.Config
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HealthzPort int
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OOMScoreAdj int
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}
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// NewProxyServer creates a new ProxyServer object with default parameters
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func NewProxyServer() *ProxyServer {
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return &ProxyServer{
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BindAddress: util.IP(net.ParseIP("0.0.0.0")),
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HealthzPort: 10249,
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OOMScoreAdj: -899,
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}
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}
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// AddFlags adds flags for a specific ProxyServer to the specified FlagSet
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func (s *ProxyServer) AddFlags(fs *pflag.FlagSet) {
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fs.Var(&s.BindAddress, "bind_address", "The IP address for the proxy server to serve on (set to 0.0.0.0 for all interfaces)")
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client.BindClientConfigFlags(fs, &s.ClientConfig)
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fs.IntVar(&s.HealthzPort, "healthz_port", s.HealthzPort, "The port to bind the health check server. Use 0 to disable.")
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fs.IntVar(&s.OOMScoreAdj, "oom_score_adj", s.OOMScoreAdj, "The oom_score_adj value for kube-proxy process. Values must be within the range [-1000, 1000]")
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}
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// Run runs the specified ProxyServer. This should never exit.
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func (s *ProxyServer) Run(_ []string) error {
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if err := util.ApplyOomScoreAdj(0, s.OOMScoreAdj); err != nil {
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glog.Info(err)
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}
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serviceConfig := config.NewServiceConfig()
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endpointsConfig := config.NewEndpointsConfig()
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protocol := iptables.ProtocolIpv4
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if net.IP(s.BindAddress).To4() == nil {
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protocol = iptables.ProtocolIpv6
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}
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loadBalancer := proxy.NewLoadBalancerRR()
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proxier := proxy.NewProxier(loadBalancer, net.IP(s.BindAddress), iptables.New(exec.New(), protocol))
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if proxier == nil {
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glog.Fatalf("failed to create proxier, aborting")
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}
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// Wire proxier to handle changes to services
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serviceConfig.RegisterHandler(proxier)
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// And wire loadBalancer to handle changes to endpoints to services
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endpointsConfig.RegisterHandler(loadBalancer)
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// Note: RegisterHandler() calls need to happen before creation of Sources because sources
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// only notify on changes, and the initial update (on process start) may be lost if no handlers
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// are registered yet.
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// define api config source
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if s.ClientConfig.Host != "" {
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glog.Infof("Using API calls to get config %v", s.ClientConfig.Host)
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client, err := client.New(&s.ClientConfig)
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if err != nil {
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glog.Fatalf("Invalid API configuration: %v", err)
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}
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config.NewSourceAPI(
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client.Services(api.NamespaceAll),
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client.Endpoints(api.NamespaceAll),
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30*time.Second,
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serviceConfig.Channel("api"),
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endpointsConfig.Channel("api"),
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)
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}
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if s.HealthzPort > 0 {
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go util.Forever(func() {
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err := http.ListenAndServe(s.BindAddress.String()+":"+strconv.Itoa(s.HealthzPort), nil)
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if err != nil {
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glog.Errorf("Starting health server failed: %v", err)
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}
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}, 5*time.Second)
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}
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// Just loop forever for now...
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proxier.SyncLoop()
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return nil
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}
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