mirror of
https://github.com/k3s-io/kubernetes.git
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126 lines
3.8 KiB
Go
126 lines
3.8 KiB
Go
/*
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Copyright 2014 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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// A binary that can morph into all of the other kubernetes binaries. You can
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// also soft-link to it busybox style.
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//
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package main
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import (
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goflag "flag"
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"math/rand"
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"os"
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"path/filepath"
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"time"
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"github.com/spf13/cobra"
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"github.com/spf13/pflag"
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cliflag "k8s.io/component-base/cli/flag"
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"k8s.io/component-base/logs"
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_ "k8s.io/component-base/metrics/prometheus/restclient" // for client metric registration
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_ "k8s.io/component-base/metrics/prometheus/version" // for version metric registration
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cloudcontrollermanager "k8s.io/kubernetes/cmd/cloud-controller-manager/app"
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kubeapiserver "k8s.io/kubernetes/cmd/kube-apiserver/app"
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kubecontrollermanager "k8s.io/kubernetes/cmd/kube-controller-manager/app"
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kubeproxy "k8s.io/kubernetes/cmd/kube-proxy/app"
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kubescheduler "k8s.io/kubernetes/cmd/kube-scheduler/app"
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kubelet "k8s.io/kubernetes/cmd/kubelet/app"
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kubectl "k8s.io/kubernetes/pkg/kubectl/cmd"
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)
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func main() {
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rand.Seed(time.Now().UnixNano())
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hyperkubeCommand, allCommandFns := NewHyperKubeCommand()
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// TODO: once we switch everything over to Cobra commands, we can go back to calling
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// cliflag.InitFlags() (by removing its pflag.Parse() call). For now, we have to set the
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// normalize func and add the go flag set by hand.
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pflag.CommandLine.SetNormalizeFunc(cliflag.WordSepNormalizeFunc)
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pflag.CommandLine.AddGoFlagSet(goflag.CommandLine)
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// cliflag.InitFlags()
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logs.InitLogs()
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defer logs.FlushLogs()
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basename := filepath.Base(os.Args[0])
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if err := commandFor(basename, hyperkubeCommand, allCommandFns).Execute(); err != nil {
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os.Exit(1)
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}
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}
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func commandFor(basename string, defaultCommand *cobra.Command, commands []func() *cobra.Command) *cobra.Command {
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for _, commandFn := range commands {
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command := commandFn()
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if command.Name() == basename {
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return command
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}
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for _, alias := range command.Aliases {
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if alias == basename {
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return command
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}
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}
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}
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return defaultCommand
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}
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// NewHyperKubeCommand is the entry point for hyperkube
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func NewHyperKubeCommand() (*cobra.Command, []func() *cobra.Command) {
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// these have to be functions since the command is polymorphic. Cobra wants you to be top level
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// command to get executed
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apiserver := func() *cobra.Command { return kubeapiserver.NewAPIServerCommand() }
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controller := func() *cobra.Command { return kubecontrollermanager.NewControllerManagerCommand() }
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proxy := func() *cobra.Command { return kubeproxy.NewProxyCommand() }
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scheduler := func() *cobra.Command { return kubescheduler.NewSchedulerCommand() }
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kubectlCmd := func() *cobra.Command { return kubectl.NewDefaultKubectlCommand() }
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kubelet := func() *cobra.Command { return kubelet.NewKubeletCommand() }
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cloudController := func() *cobra.Command {
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cmd := cloudcontrollermanager.NewCloudControllerManagerCommand()
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cmd.Deprecated = "please use the cloud controller manager specific " +
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"to your external cloud provider"
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return cmd
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}
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commandFns := []func() *cobra.Command{
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apiserver,
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controller,
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proxy,
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scheduler,
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kubectlCmd,
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kubelet,
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cloudController,
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}
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cmd := &cobra.Command{
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Use: "hyperkube",
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Short: "Request a new project",
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Run: func(cmd *cobra.Command, args []string) {
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if len(args) != 0 {
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cmd.Help()
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os.Exit(1)
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}
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},
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}
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for i := range commandFns {
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cmd.AddCommand(commandFns[i]())
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}
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return cmd, commandFns
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}
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