func main() {
if reexec.Init() {
return
}
var insecureRegistries vars.StringList
flag.Var(
&insecureRegistries,
"insecureDockerRegistry",
"Docker registry to allow connecting to even if not secure. (Can be specified multiple times to allow insecure connection to multiple repositories)",
)
var persistentImages vars.StringList
flag.Var(
&persistentImages,
"persistentImage",
"Image which should never be garbage collected. (Can be specified multiple times)",
)
var dnsServers vars.StringList
flag.Var(
&dnsServers,
"dnsServer",
"DNS server IP address to use instead of automatically determined servers. (Can be specified multiple times)",
)
cf_debug_server.AddFlags(flag.CommandLine)
cf_lager.AddFlags(flag.CommandLine)
flag.Parse()
runtime.GOMAXPROCS(runtime.NumCPU())
logger, reconfigurableSink := cf_lager.New("garden-linux")
initializeDropsonde(logger)
if *binPath == "" {
missing("-bin")
}
if *stateDirPath == "" {
missing("-stateDir")
}
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)
}
portPoolState, err := port_pool.LoadState(path.Join(*stateDirPath, "port_pool.json"))
if err != nil {
logger.Error("failed-to-parse-pool-state", err)
}
// TODO: use /proc/sys/net/ipv4/ip_local_port_range by default (end + 1)
portPool, err := port_pool.New(uint32(*portPoolStart), uint32(*portPoolSize), portPoolState)
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, dnsServers.List)
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 := selectGraphDriver(logger, *graphDriverName, *graphRoot)
if err != nil {
logger.Fatal("failed-to-construct-graph-driver", err)
}
backingStoresPath := filepath.Join(*graphRoot, "backing_stores")
if err := os.MkdirAll(backingStoresPath, 0660); err != nil {
logger.Fatal("failed-to-mkdir-backing-stores", err)
}
quotaedGraphDriver := "aed_aufs.QuotaedDriver{
GraphDriver: dockerGraphDriver,
Unmount: quotaed_aufs.Unmount,
BackingStoreMgr: "aed_aufs.BackingStore{
RootPath: backingStoresPath,
Logger: logger.Session("backing-store-mgr"),
},
LoopMounter: "aed_aufs.Loop{
Retrier: retrier.New(retrier.ConstantBackoff(200, 500*time.Millisecond), nil),
Logger: logger.Session("loop-mounter"),
},
Retrier: retrier.New(retrier.ConstantBackoff(200, 500*time.Millisecond), nil),
RootPath: *graphRoot,
Logger: logger.Session("quotaed-driver"),
}
metricsProvider := metrics.NewMetrics(logger, backingStoresPath, *depotPath)
if dbgAddr := cf_debug_server.DebugAddress(flag.CommandLine); dbgAddr != "" {
metrics.StartDebugServer(dbgAddr, reconfigurableSink, metricsProvider)
}
dockerGraph, err := graph.NewGraph(*graphRoot, quotaedGraphDriver)
if err != nil {
logger.Fatal("failed-to-construct-graph", err)
}
var cake layercake.Cake = &layercake.Docker{
Graph: dockerGraph,
Driver: quotaedGraphDriver,
}
if cake.DriverName() == "aufs" {
cake = &layercake.AufsCake{
Cake: cake,
Runner: runner,
GraphRoot: *graphRoot,
}
}
repo := container_repository.New()
retainer := cleaner.NewRetainer()
repoFetcher := &repository_fetcher.Retryable{
RepositoryFetcher: &repository_fetcher.CompositeFetcher{
LocalFetcher: &repository_fetcher.Local{
Cake: cake,
DefaultRootFSPath: *rootFSPath,
IDProvider: repository_fetcher.LayerIDProvider{},
},
RemoteFetcher: repository_fetcher.NewRemote(
logger,
*dockerRegistry,
cake,
distclient.NewDialer(insecureRegistries.List),
repository_fetcher.VerifyFunc(repository_fetcher.Verify),
),
},
Logger: logger,
}
maxId := uint32(sysinfo.Min(sysinfo.MustGetMaxValidUID(), sysinfo.MustGetMaxValidGID()))
mappingList := rootfs_provider.MappingList{
{
ContainerID: 0,
HostID: maxId,
Size: 1,
},
{
ContainerID: 1,
HostID: 1,
Size: maxId - 1,
},
}
rootFSNamespacer := &rootfs_provider.UidNamespacer{
Logger: logger,
Translator: rootfs_provider.NewUidTranslator(
mappingList, // uid
mappingList, // gid
),
}
cleaner := cleaner.NewOvenCleaner(
retainer,
cleaner.NewThreshold(int64(*graphCleanupThreshold)*1024*1024),
)
layerCreator := rootfs_provider.NewLayerCreator(cake, rootfs_provider.SimpleVolumeCreator{}, rootFSNamespacer)
cakeOrdinator := rootfs_provider.NewCakeOrdinator(cake, repoFetcher, layerCreator, nil, cleaner)
imageRetainer := &repository_fetcher.ImageRetainer{
GraphRetainer: retainer,
DirectoryRootfsIDProvider: repository_fetcher.LayerIDProvider{},
DockerImageIDFetcher: repoFetcher,
NamespaceCacheKey: rootFSNamespacer.CacheKey(),
Logger: logger,
}
// spawn off in a go function to avoid blocking startup
// worst case is if an image is immediately created and deleted faster than
// we can retain it we'll garbage collect it when we shouldn't. This
// is an OK trade-off for not having garden startup block on dockerhub.
go imageRetainer.Retain(persistentImages.List)
rootfsCleaner := &linux_backend.RootFSCleaner{
FilePaths: []string{
"/tmp", "/proc", "/sys", "/dev", "/etc", "/etc/config", "/etc/hostname",
"/etc/hosts", "/etc/resolv.conf",
},
}
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 = "a_manager.AUFSQuotaManager{
BaseSizer: quota_manager.NewAUFSBaseSizer(cake),
DiffSizer: "a_manager.AUFSDiffSizer{quotaedGraphDriver},
}
ipTablesMgr := createIPTablesManager(config, runner, logger)
injector := &provider{
useKernelLogging: useKernelLogging,
chainPrefix: config.IPTables.Filter.InstancePrefix,
runner: runner,
log: logger,
portPool: portPool,
ipTablesMgr: ipTablesMgr,
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,
cakeOrdinator,
rootfsCleaner,
mappingList,
parsedExternalIP,
*mtu,
subnetPool,
bridgemgr.New("w"+config.Tag+"b-", &devices.Bridge{}, &devices.Link{}),
ipTablesMgr,
injector,
iptables.NewGlobalChain(config.IPTables.Filter.DefaultChain, runner, logger.Session("global-chain")),
portPool,
strings.Split(*denyNetworks, ","),
strings.Split(*allowNetworks, ","),
runner,
quotaManager,
currentContainerVersion,
system.MkdirChowner{},
)
systemInfo := sysinfo.NewProvider(*depotPath)
backend := linux_backend.New(logger, pool, repo, injector, systemInfo, layercake.GraphPath(*graphRoot), *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)
}
clock := clock.NewClock()
metronNotifier := metrics.NewPeriodicMetronNotifier(logger, metricsProvider, *metricsEmissionInterval, clock)
metronNotifier.Start()
signals := make(chan os.Signal, 1)
go func() {
<-signals
portPoolState = portPool.RefreshState()
port_pool.SaveState(path.Join(*stateDirPath, "port_pool.json"), portPoolState)
gardenServer.Stop()
metronNotifier.Stop()
os.Exit(0)
}()
signal.Notify(signals, syscall.SIGINT, syscall.SIGTERM, syscall.SIGHUP)
logger.Info("started", lager.Data{
"network": *listenNetwork,
"addr": *listenAddr,
})
select {}
}
Expect(ioutil.WriteFile(
filepath.Join(backingStorePath, "bs-1"), []byte("test"), 0660,
)).To(Succeed())
Expect(ioutil.WriteFile(
filepath.Join(backingStorePath, "bs-2"), []byte("test"), 0660,
)).To(Succeed())
depotPath, err = ioutil.TempDir("", "depotDirs")
Expect(err).NotTo(HaveOccurred())
Expect(os.Mkdir(filepath.Join(depotPath, "depot-1"), 0660)).To(Succeed())
Expect(os.Mkdir(filepath.Join(depotPath, "depot-2"), 0660)).To(Succeed())
Expect(os.Mkdir(filepath.Join(depotPath, "depot-3"), 0660)).To(Succeed())
Expect(err).ToNot(HaveOccurred())
logger := lagertest.NewTestLogger("test")
m = metrics.NewMetrics(logger, backingStorePath, depotPath)
})
AfterEach(func() {
Expect(os.RemoveAll(depotPath)).To(Succeed())
Expect(os.RemoveAll(backingStorePath)).To(Succeed())
})
It("should report the number of loop devices, backing store files and depotDirs", func() {
Expect(m.NumCPU()).To(Equal(runtime.NumCPU()))
Expect(m.NumGoroutine()).To(BeNumerically("~", runtime.NumGoroutine(), 2))
Expect(m.LoopDevices()).NotTo(BeNil())
Expect(m.BackingStores()).To(Equal(2))
Expect(m.DepotDirs()).To(Equal(3))
})
})