145 lines
5 KiB
Go
145 lines
5 KiB
Go
/*
|
|
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 main
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
"k8s.io/apimachinery/pkg/util/sets"
|
|
"k8s.io/kubernetes/pkg/api/v1"
|
|
"k8s.io/kubernetes/pkg/client/clientset_generated/clientset"
|
|
"k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset"
|
|
_ "k8s.io/kubernetes/pkg/client/metrics/prometheus" // for client metric registration
|
|
"k8s.io/kubernetes/pkg/client/record"
|
|
"k8s.io/kubernetes/pkg/client/restclient"
|
|
"k8s.io/kubernetes/pkg/client/unversioned/clientcmd"
|
|
cadvisortest "k8s.io/kubernetes/pkg/kubelet/cadvisor/testing"
|
|
"k8s.io/kubernetes/pkg/kubelet/cm"
|
|
"k8s.io/kubernetes/pkg/kubelet/dockertools"
|
|
"k8s.io/kubernetes/pkg/kubemark"
|
|
proxyconfig "k8s.io/kubernetes/pkg/proxy/config"
|
|
"k8s.io/kubernetes/pkg/util/flag"
|
|
fakeiptables "k8s.io/kubernetes/pkg/util/iptables/testing"
|
|
_ "k8s.io/kubernetes/pkg/version/prometheus" // for version metric registration
|
|
|
|
"github.com/golang/glog"
|
|
"github.com/spf13/pflag"
|
|
)
|
|
|
|
type HollowNodeConfig struct {
|
|
KubeconfigPath string
|
|
KubeletPort int
|
|
KubeletReadOnlyPort int
|
|
Morph string
|
|
NodeName string
|
|
ServerPort int
|
|
ContentType string
|
|
}
|
|
|
|
const (
|
|
maxPods = 110
|
|
podsPerCore = 0
|
|
)
|
|
|
|
var knownMorphs = sets.NewString("kubelet", "proxy")
|
|
|
|
func (c *HollowNodeConfig) addFlags(fs *pflag.FlagSet) {
|
|
fs.StringVar(&c.KubeconfigPath, "kubeconfig", "/kubeconfig/kubeconfig", "Path to kubeconfig file.")
|
|
fs.IntVar(&c.KubeletPort, "kubelet-port", 10250, "Port on which HollowKubelet should be listening.")
|
|
fs.IntVar(&c.KubeletReadOnlyPort, "kubelet-read-only-port", 10255, "Read-only port on which Kubelet is listening.")
|
|
fs.StringVar(&c.NodeName, "name", "fake-node", "Name of this Hollow Node.")
|
|
fs.IntVar(&c.ServerPort, "api-server-port", 443, "Port on which API server is listening.")
|
|
fs.StringVar(&c.Morph, "morph", "", fmt.Sprintf("Specifies into which Hollow component this binary should morph. Allowed values: %v", knownMorphs.List()))
|
|
fs.StringVar(&c.ContentType, "kube-api-content-type", "application/vnd.kubernetes.protobuf", "ContentType of requests sent to apiserver.")
|
|
}
|
|
|
|
func (c *HollowNodeConfig) createClientConfigFromFile() (*restclient.Config, error) {
|
|
clientConfig, err := clientcmd.LoadFromFile(c.KubeconfigPath)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("error while loading kubeconfig from file %v: %v", c.KubeconfigPath, err)
|
|
}
|
|
config, err := clientcmd.NewDefaultClientConfig(*clientConfig, &clientcmd.ConfigOverrides{}).ClientConfig()
|
|
if err != nil {
|
|
return nil, fmt.Errorf("error while creating kubeconfig: %v", err)
|
|
}
|
|
config.ContentType = c.ContentType
|
|
config.QPS = 10
|
|
config.Burst = 20
|
|
return config, nil
|
|
}
|
|
|
|
func main() {
|
|
config := HollowNodeConfig{}
|
|
config.addFlags(pflag.CommandLine)
|
|
flag.InitFlags()
|
|
|
|
if !knownMorphs.Has(config.Morph) {
|
|
glog.Fatalf("Unknown morph: %v. Allowed values: %v", config.Morph, knownMorphs.List())
|
|
}
|
|
|
|
// create a client to communicate with API server.
|
|
clientConfig, err := config.createClientConfigFromFile()
|
|
if err != nil {
|
|
glog.Fatalf("Failed to create a ClientConfig: %v. Exiting.", err)
|
|
}
|
|
|
|
clientset, err := clientset.NewForConfig(clientConfig)
|
|
if err != nil {
|
|
glog.Fatalf("Failed to create a ClientSet: %v. Exiting.", err)
|
|
}
|
|
internalClientset, err := internalclientset.NewForConfig(clientConfig)
|
|
if err != nil {
|
|
glog.Fatalf("Failed to create an internal ClientSet: %v. Exiting.", err)
|
|
}
|
|
|
|
if config.Morph == "kubelet" {
|
|
cadvisorInterface := new(cadvisortest.Fake)
|
|
containerManager := cm.NewStubContainerManager()
|
|
|
|
fakeDockerClient := dockertools.NewFakeDockerClient()
|
|
fakeDockerClient.EnableSleep = true
|
|
|
|
hollowKubelet := kubemark.NewHollowKubelet(
|
|
config.NodeName,
|
|
clientset,
|
|
cadvisorInterface,
|
|
fakeDockerClient,
|
|
config.KubeletPort,
|
|
config.KubeletReadOnlyPort,
|
|
containerManager,
|
|
maxPods,
|
|
podsPerCore,
|
|
)
|
|
hollowKubelet.Run()
|
|
}
|
|
|
|
if config.Morph == "proxy" {
|
|
eventBroadcaster := record.NewBroadcaster()
|
|
recorder := eventBroadcaster.NewRecorder(v1.EventSource{Component: "kube-proxy", Host: config.NodeName})
|
|
|
|
iptInterface := fakeiptables.NewFake()
|
|
|
|
serviceConfig := proxyconfig.NewServiceConfig()
|
|
serviceConfig.RegisterHandler(&kubemark.FakeProxyHandler{})
|
|
|
|
endpointsConfig := proxyconfig.NewEndpointsConfig()
|
|
endpointsConfig.RegisterHandler(&kubemark.FakeProxyHandler{})
|
|
|
|
hollowProxy := kubemark.NewHollowProxyOrDie(config.NodeName, internalClientset, endpointsConfig, serviceConfig, iptInterface, eventBroadcaster, recorder)
|
|
hollowProxy.Run()
|
|
}
|
|
}
|