コード例 #1
0
	"math/rand"

	"sync"

	"runtime"

	"github.com/cloudfoundry-incubator/garden-linux/repository_fetcher"
	. "github.com/onsi/ginkgo"
	. "github.com/onsi/gomega"
)

var _ = Describe("Graph Lock", func() {
	var lock *repository_fetcher.FetchLock

	BeforeEach(func() {
		lock = repository_fetcher.NewFetchLock()
	})

	Describe("Acquire", func() {
		Context("when the layer is locked", func() {
			BeforeEach(func() {
				lock.Acquire("some-key")
			})

			It("waits for the lock to be released", func() {
				gotLock := make(chan struct{}, 1)

				go func(lock *repository_fetcher.FetchLock, gotLock chan struct{}) {
					go GinkgoRecover()
					lock.Acquire("some-key")
					close(gotLock)
コード例 #2
0
ファイル: main.go プロジェクト: guanglinlv/garden-linux
func main() {
	if reexec.Init() {
		return
	}

	cf_debug_server.AddFlags(flag.CommandLine)
	cf_lager.AddFlags(flag.CommandLine)
	flag.Parse()

	runtime.GOMAXPROCS(runtime.NumCPU())

	logger, reconfigurableSink := cf_lager.New("garden-linux")
	if dbgAddr := cf_debug_server.DebugAddress(flag.CommandLine); dbgAddr != "" {
		debug.Run(dbgAddr, reconfigurableSink)
	}

	initializeDropsonde(logger)

	if *binPath == "" {
		missing("-bin")
	}

	if *depotPath == "" {
		missing("-depot")
	}

	if len(*tag) > 2 {
		println("-tag parameter must be less than 3 characters long")
		println()
		flag.Usage()
		return
	}

	_, dynamicRange, err := net.ParseCIDR(*networkPool)
	if err != nil {
		logger.Fatal("failed-to-parse-network-pool", err)
	}

	subnetPool, err := subnets.NewSubnets(dynamicRange)
	if err != nil {
		logger.Fatal("failed-to-create-subnet-pool", err)
	}

	// TODO: use /proc/sys/net/ipv4/ip_local_port_range by default (end + 1)
	portPool, err := port_pool.New(uint32(*portPoolStart), uint32(*portPoolSize))
	if err != nil {
		logger.Fatal("invalid pool range", err)
	}

	useKernelLogging := true
	switch *iptablesLogMethod {
	case "nflog":
		useKernelLogging = false
	case "kernel":
		/* noop */
	default:
		println("-iptablesLogMethod value not recognized")
		println()
		flag.Usage()
		return
	}

	config := sysconfig.NewConfig(*tag, *allowHostAccess)

	runner := sysconfig.NewRunner(config, linux_command_runner.New())

	if err := os.MkdirAll(*graphRoot, 0755); err != nil {
		logger.Fatal("failed-to-create-graph-directory", err)
	}

	dockerGraphDriver, err := graphdriver.New(*graphRoot, nil)
	if err != nil {
		logger.Fatal("failed-to-construct-graph-driver", err)
	}

	dockerGraph, err := graph.NewGraph(*graphRoot, dockerGraphDriver)
	if err != nil {
		logger.Fatal("failed-to-construct-graph", err)
	}

	graphMountPoint := mountPoint(logger, *graphRoot)

	var cake layercake.Cake = &layercake.Docker{
		Graph:  dockerGraph,
		Driver: dockerGraphDriver,
	}

	if cake.DriverName() == "btrfs" {
		cake = &layercake.BtrfsCleaningCake{
			Cake:            cake,
			Runner:          runner,
			BtrfsMountPoint: graphMountPoint,
			RemoveAll:       os.RemoveAll,
			Logger:          logger.Session("btrfs-cleanup"),
		}
	}

	retainer := layercake.NewRetainer()
	cake = &layercake.OvenCleaner{
		Cake:     cake,
		Retainer: retainer,
		Logger:   logger.Session("oven-cleaner"),
	}

	lock := repository_fetcher.NewFetchLock()
	repoFetcher := repository_fetcher.Retryable{
		repository_fetcher.NewRemote(
			repository_fetcher.NewRepositoryProvider(
				*dockerRegistry,
				strings.Split(*insecureRegistries, ","),
			),
			cake,
			map[registry.APIVersion]repository_fetcher.VersionedFetcher{
				registry.APIVersion1: &repository_fetcher.RemoteV1Fetcher{
					Cake:      cake,
					Retainer:  retainer,
					GraphLock: lock,
				},
				registry.APIVersion2: &repository_fetcher.RemoteV2Fetcher{
					Cake:      cake,
					Retainer:  retainer,
					GraphLock: lock,
				},
			},
			repository_fetcher.EndpointPinger{},
		),
	}

	maxId := sysinfo.Min(sysinfo.MustGetMaxValidUID(), sysinfo.MustGetMaxValidGID())
	mappingList := rootfs_provider.MappingList{
		{
			FromID: 0,
			ToID:   maxId,
			Size:   1,
		},
		{
			FromID: 1,
			ToID:   1,
			Size:   maxId - 1,
		},
	}

	rootFSNamespacer := &rootfs_provider.UidNamespacer{
		Logger: logger,
		Translator: rootfs_provider.NewUidTranslator(
			mappingList, // uid
			mappingList, // gid
		),
	}

	remoteRootFSProvider, err := rootfs_provider.NewDocker(fmt.Sprintf("docker-remote-%s", cake.DriverName()),
		repoFetcher, cake, rootfs_provider.SimpleVolumeCreator{}, rootFSNamespacer, clock.NewClock())
	if err != nil {
		logger.Fatal("failed-to-construct-docker-rootfs-provider", err)
	}

	localRootFSProvider, err := rootfs_provider.NewDocker(fmt.Sprintf("docker-local-%s", cake.DriverName()),
		&repository_fetcher.Local{
			Cake:              cake,
			DefaultRootFSPath: *rootFSPath,
			IDProvider:        repository_fetcher.LayerIDProvider{},
		}, cake, rootfs_provider.SimpleVolumeCreator{}, rootFSNamespacer, clock.NewClock())
	if err != nil {
		logger.Fatal("failed-to-construct-warden-rootfs-provider", err)
	}

	rootFSProviders := map[string]rootfs_provider.RootFSProvider{
		"":       localRootFSProvider,
		"docker": remoteRootFSProvider,
	}

	if *externalIP == "" {
		ip, err := localip.LocalIP()
		if err != nil {
			panic("couldn't determine local IP to use for -externalIP parameter. You can use the -externalIP flag to pass an external IP")
		}

		externalIP = &ip
	}

	parsedExternalIP := net.ParseIP(*externalIP)
	if parsedExternalIP == nil {
		panic(fmt.Sprintf("Value of -externalIP %s could not be converted to an IP", *externalIP))
	}

	var quotaManager linux_container.QuotaManager = quota_manager.DisabledQuotaManager{}
	if !*disableQuotas {
		quotaManager = &quota_manager.BtrfsQuotaManager{
			Runner:     runner,
			MountPoint: graphMountPoint,
		}
	}

	injector := &provider{
		useKernelLogging: useKernelLogging,
		chainPrefix:      config.IPTables.Filter.InstancePrefix,
		runner:           runner,
		log:              logger,
		portPool:         portPool,
		sysconfig:        config,
		quotaManager:     quotaManager,
	}

	currentContainerVersion, err := semver.Make(CurrentContainerVersion)
	if err != nil {
		logger.Fatal("failed-to-parse-container-version", err)
	}

	pool := resource_pool.New(
		logger,
		*binPath,
		*depotPath,
		config,
		rootFSProviders,
		cake,
		mappingList,
		parsedExternalIP,
		*mtu,
		subnetPool,
		bridgemgr.New("w"+config.Tag+"b-", &devices.Bridge{}, &devices.Link{}),
		injector,
		iptables.NewGlobalChain(config.IPTables.Filter.DefaultChain, runner, logger.Session("global-chain")),
		portPool,
		strings.Split(*denyNetworks, ","),
		strings.Split(*allowNetworks, ","),
		runner,
		quotaManager,
		currentContainerVersion,
	)

	systemInfo := sysinfo.NewProvider(*depotPath)

	backend := linux_backend.New(logger, pool, container_repository.New(), injector, systemInfo, *snapshotsPath, int(*maxContainers))

	err = backend.Setup()
	if err != nil {
		logger.Fatal("failed-to-set-up-backend", err)
	}

	graceTime := *containerGraceTime

	gardenServer := server.New(*listenNetwork, *listenAddr, graceTime, backend, logger)

	err = gardenServer.Start()
	if err != nil {
		logger.Fatal("failed-to-start-server", err)
	}

	signals := make(chan os.Signal, 1)

	go func() {
		<-signals
		gardenServer.Stop()
		os.Exit(0)
	}()

	signal.Notify(signals, syscall.SIGINT, syscall.SIGTERM, syscall.SIGHUP)

	logger.Info("started", lager.Data{
		"network": *listenNetwork,
		"addr":    *listenAddr,
	})

	select {}
}