mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-11-10 16:30:19 +00:00
168 lines
5.4 KiB
Go
168 lines
5.4 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 main
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import (
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"fmt"
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"k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/util/sets"
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"k8s.io/apiserver/pkg/util/flag"
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clientset "k8s.io/client-go/kubernetes"
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restclient "k8s.io/client-go/rest"
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"k8s.io/client-go/tools/clientcmd"
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"k8s.io/client-go/tools/record"
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"k8s.io/kubernetes/pkg/api/legacyscheme"
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"k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset"
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_ "k8s.io/kubernetes/pkg/client/metrics/prometheus" // for client metric registration
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cadvisortest "k8s.io/kubernetes/pkg/kubelet/cadvisor/testing"
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"k8s.io/kubernetes/pkg/kubelet/cm"
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"k8s.io/kubernetes/pkg/kubelet/dockershim"
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"k8s.io/kubernetes/pkg/kubelet/dockershim/libdocker"
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"k8s.io/kubernetes/pkg/kubemark"
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fakeiptables "k8s.io/kubernetes/pkg/util/iptables/testing"
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fakesysctl "k8s.io/kubernetes/pkg/util/sysctl/testing"
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_ "k8s.io/kubernetes/pkg/version/prometheus" // for version metric registration
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fakeexec "k8s.io/utils/exec/testing"
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"github.com/golang/glog"
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"github.com/spf13/pflag"
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)
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type HollowNodeConfig struct {
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KubeconfigPath string
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KubeletPort int
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KubeletReadOnlyPort int
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Morph string
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NodeName string
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ServerPort int
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ContentType string
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UseRealProxier bool
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}
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const (
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maxPods = 110
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podsPerCore = 0
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)
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var knownMorphs = sets.NewString("kubelet", "proxy")
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func (c *HollowNodeConfig) addFlags(fs *pflag.FlagSet) {
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fs.StringVar(&c.KubeconfigPath, "kubeconfig", "/kubeconfig/kubeconfig", "Path to kubeconfig file.")
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fs.IntVar(&c.KubeletPort, "kubelet-port", 10250, "Port on which HollowKubelet should be listening.")
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fs.IntVar(&c.KubeletReadOnlyPort, "kubelet-read-only-port", 10255, "Read-only port on which Kubelet is listening.")
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fs.StringVar(&c.NodeName, "name", "fake-node", "Name of this Hollow Node.")
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fs.IntVar(&c.ServerPort, "api-server-port", 443, "Port on which API server is listening.")
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fs.StringVar(&c.Morph, "morph", "", fmt.Sprintf("Specifies into which Hollow component this binary should morph. Allowed values: %v", knownMorphs.List()))
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fs.StringVar(&c.ContentType, "kube-api-content-type", "application/vnd.kubernetes.protobuf", "ContentType of requests sent to apiserver.")
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fs.BoolVar(&c.UseRealProxier, "use-real-proxier", true, "Set to true if you want to use real proxier inside hollow-proxy.")
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}
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func (c *HollowNodeConfig) createClientConfigFromFile() (*restclient.Config, error) {
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clientConfig, err := clientcmd.LoadFromFile(c.KubeconfigPath)
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if err != nil {
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return nil, fmt.Errorf("error while loading kubeconfig from file %v: %v", c.KubeconfigPath, err)
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}
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config, err := clientcmd.NewDefaultClientConfig(*clientConfig, &clientcmd.ConfigOverrides{}).ClientConfig()
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if err != nil {
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return nil, fmt.Errorf("error while creating kubeconfig: %v", err)
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}
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config.ContentType = c.ContentType
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config.QPS = 10
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config.Burst = 20
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return config, nil
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}
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func main() {
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config := HollowNodeConfig{}
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config.addFlags(pflag.CommandLine)
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flag.InitFlags()
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if !knownMorphs.Has(config.Morph) {
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glog.Fatalf("Unknown morph: %v. Allowed values: %v", config.Morph, knownMorphs.List())
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}
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// create a client to communicate with API server.
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clientConfig, err := config.createClientConfigFromFile()
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if err != nil {
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glog.Fatalf("Failed to create a ClientConfig: %v. Exiting.", err)
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}
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client, err := clientset.NewForConfig(clientConfig)
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if err != nil {
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glog.Fatalf("Failed to create a ClientSet: %v. Exiting.", err)
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}
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internalClientset, err := internalclientset.NewForConfig(clientConfig)
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if err != nil {
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glog.Fatalf("Failed to create an internal ClientSet: %v. Exiting.", err)
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}
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if config.Morph == "kubelet" {
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cadvisorInterface := &cadvisortest.Fake{
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NodeName: config.NodeName,
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}
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containerManager := cm.NewStubContainerManager()
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fakeDockerClientConfig := &dockershim.ClientConfig{
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DockerEndpoint: libdocker.FakeDockerEndpoint,
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EnableSleep: true,
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WithTraceDisabled: true,
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}
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hollowKubelet := kubemark.NewHollowKubelet(
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config.NodeName,
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client,
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cadvisorInterface,
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fakeDockerClientConfig,
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config.KubeletPort,
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config.KubeletReadOnlyPort,
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containerManager,
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maxPods,
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podsPerCore,
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)
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hollowKubelet.Run()
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}
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if config.Morph == "proxy" {
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client, err := clientset.NewForConfig(clientConfig)
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if err != nil {
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glog.Fatalf("Failed to create API Server client: %v", err)
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}
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iptInterface := fakeiptables.NewFake()
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sysctl := fakesysctl.NewFake()
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execer := &fakeexec.FakeExec{}
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eventBroadcaster := record.NewBroadcaster()
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recorder := eventBroadcaster.NewRecorder(legacyscheme.Scheme, v1.EventSource{Component: "kube-proxy", Host: config.NodeName})
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hollowProxy, err := kubemark.NewHollowProxyOrDie(
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config.NodeName,
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internalClientset,
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client.CoreV1(),
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iptInterface,
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sysctl,
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execer,
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eventBroadcaster,
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recorder,
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config.UseRealProxier,
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)
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if err != nil {
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glog.Fatalf("Failed to create hollowProxy instance: %v", err)
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}
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hollowProxy.Run()
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}
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}
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