Example #1
0
// TODO: move this into the kubelet itself
func InitHealthChecking(k *Kubelet) {
	// TODO: These should probably become more plugin-ish: register a factory func
	// in each checker's init(), iterate those here.
	health.AddHealthChecker(health.NewExecHealthChecker(k))
	health.AddHealthChecker(health.NewHTTPHealthChecker(&http.Client{}))
	health.AddHealthChecker(&health.TCPHealthChecker{})
}
Example #2
0
func main() {
	flag.Parse()
	util.InitLogs()
	defer util.FlushLogs()
	rand.Seed(time.Now().UTC().UnixNano())

	verflag.PrintAndExitIfRequested()

	if *runonce {
		exclusiveFlag := "invalid option: --runonce and %s are mutually exclusive"
		if len(etcdServerList) > 0 {
			glog.Fatalf(exclusiveFlag, "--etcd_servers")
		}
		if *enableServer {
			glog.Infof("--runonce is set, disabling server")
			*enableServer = false
		}
	}

	etcd.SetLogger(util.NewLogger("etcd "))

	// Log the events locally too.
	record.StartLogging(glog.Infof)

	capabilities.Initialize(capabilities.Capabilities{
		AllowPrivileged: *allowPrivileged,
	})

	dockerClient, err := docker.NewClient(getDockerEndpoint())
	if err != nil {
		glog.Fatal("Couldn't connect to docker.")
	}

	hostname := getHostname()

	if *rootDirectory == "" {
		glog.Fatal("Invalid root directory path.")
	}
	*rootDirectory = path.Clean(*rootDirectory)
	if err := os.MkdirAll(*rootDirectory, 0750); err != nil {
		glog.Fatalf("Error creating root directory: %v", err)
	}

	// source of all configuration
	cfg := kconfig.NewPodConfig(kconfig.PodConfigNotificationSnapshotAndUpdates)

	// define file config source
	if *config != "" {
		kconfig.NewSourceFile(*config, *fileCheckFrequency, cfg.Channel("file"))
	}

	// define url config source
	if *manifestURL != "" {
		kconfig.NewSourceURL(*manifestURL, *httpCheckFrequency, cfg.Channel("http"))
	}

	// define etcd config source and initialize etcd client
	var etcdClient *etcd.Client
	if len(etcdServerList) > 0 {
		etcdClient = etcd.NewClient(etcdServerList)
	} else if *etcdConfigFile != "" {
		var err error
		etcdClient, err = etcd.NewClientFromFile(*etcdConfigFile)
		if err != nil {
			glog.Fatalf("Error with etcd config file: %v", err)
		}
	}

	if etcdClient != nil {
		glog.Infof("Watching for etcd configs at %v", etcdClient.GetCluster())
		kconfig.NewSourceEtcd(kconfig.EtcdKeyForHost(hostname), etcdClient, cfg.Channel("etcd"))
	}

	// TODO: block until all sources have delivered at least one update to the channel, or break the sync loop
	// up into "per source" synchronizations

	k := kubelet.NewMainKubelet(
		getHostname(),
		dockerClient,
		etcdClient,
		*rootDirectory,
		*networkContainerImage,
		*syncFrequency,
		float32(*registryPullQPS),
		*registryBurst,
		*minimumGCAge,
		*maxContainerCount)

	k.BirthCry()

	go func() {
		util.Forever(func() {
			err := k.GarbageCollectContainers()
			if err != nil {
				glog.Errorf("Garbage collect failed: %v", err)
			}
		}, time.Minute*1)
	}()

	go func() {
		defer util.HandleCrash()
		// TODO: Monitor this connection, reconnect if needed?
		glog.V(1).Infof("Trying to create cadvisor client.")
		cadvisorClient, err := cadvisor.NewClient("http://127.0.0.1:4194")
		if err != nil {
			glog.Errorf("Error on creating cadvisor client: %v", err)
			return
		}
		glog.V(1).Infof("Successfully created cadvisor client.")
		k.SetCadvisorClient(cadvisorClient)
	}()

	// TODO: These should probably become more plugin-ish: register a factory func
	// in each checker's init(), iterate those here.
	health.AddHealthChecker(health.NewExecHealthChecker(k))
	health.AddHealthChecker(health.NewHTTPHealthChecker(&http.Client{}))
	health.AddHealthChecker(&health.TCPHealthChecker{})

	// process pods and exit.
	if *runonce {
		if _, err := k.RunOnce(cfg.Updates()); err != nil {
			glog.Fatalf("--runonce failed: %v", err)
		}
		return
	}

	// start the kubelet
	go util.Forever(func() { k.Run(cfg.Updates()) }, 0)

	// start the kubelet server
	if *enableServer {
		go util.Forever(func() {
			kubelet.ListenAndServeKubeletServer(k, cfg.Channel("http"), net.IP(address), *port, *enableDebuggingHandlers)
		}, 0)
	}

	// runs forever
	select {}
}
Example #3
0
func main() {
	flag.Parse()
	util.InitLogs()
	defer util.FlushLogs()
	rand.Seed(time.Now().UTC().UnixNano())

	verflag.PrintAndExitIfRequested()

	etcd.SetLogger(util.NewLogger("etcd "))

	dockerClient, err := docker.NewClient(getDockerEndpoint())
	if err != nil {
		glog.Fatal("Couldn't connect to docker.")
	}

	cadvisorClient, err := cadvisor.NewClient("http://127.0.0.1:4194")
	if err != nil {
		glog.Errorf("Error on creating cadvisor client: %v", err)
	}

	hostname := getHostname()

	if *rootDirectory == "" {
		glog.Fatal("Invalid root directory path.")
	}
	*rootDirectory = path.Clean(*rootDirectory)
	os.MkdirAll(*rootDirectory, 0750)

	// source of all configuration
	cfg := kconfig.NewPodConfig(kconfig.PodConfigNotificationSnapshotAndUpdates)

	// define file config source
	if *config != "" {
		kconfig.NewSourceFile(*config, *fileCheckFrequency, cfg.Channel("file"))
	}

	// define url config source
	if *manifestURL != "" {
		kconfig.NewSourceURL(*manifestURL, *httpCheckFrequency, cfg.Channel("http"))
	}

	// define etcd config source and initialize etcd client
	var etcdClient tools.EtcdClient
	if len(etcdServerList) > 0 {
		glog.Infof("Watching for etcd configs at %v", etcdServerList)
		etcdClient = etcd.NewClient(etcdServerList)
		kconfig.NewSourceEtcd(kconfig.EtcdKeyForHost(hostname), etcdClient, cfg.Channel("etcd"))
	}

	// TODO: block until all sources have delivered at least one update to the channel, or break the sync loop
	// up into "per source" synchronizations

	k := kubelet.NewMainKubelet(
		getHostname(),
		dockerClient,
		cadvisorClient,
		etcdClient,
		*rootDirectory,
		*syncFrequency,
		*allowPrivileged)

	health.AddHealthChecker("exec", health.NewExecHealthChecker(k))
	health.AddHealthChecker("http", health.NewHTTPHealthChecker(&http.Client{}))
	health.AddHealthChecker("tcp", &health.TCPHealthChecker{})

	// start the kubelet
	go util.Forever(func() { k.Run(cfg.Updates()) }, 0)

	// start the kubelet server
	if *enableServer {
		go util.Forever(func() {
			kubelet.ListenAndServeKubeletServer(k, cfg.Channel("http"), *address, *port)
		}, 0)
	}

	// runs forever
	select {}
}