Example #1
0
func runRun(cmd *cobra.Command, args []string) (exit int) {
	privateUsers := user.NewBlankUidRange()
	err := parseApps(&rktApps, args, cmd.Flags(), true)
	if err != nil {
		stderr.PrintE("error parsing app image arguments", err)
		return 1
	}

	if flagStoreOnly && flagNoStore {
		stderr.Print("both --store-only and --no-store specified")
		return 1
	}

	if flagPrivateUsers {
		if !common.SupportsUserNS() {
			stderr.Print("--private-users is not supported, kernel compiled without user namespace support")
			return 1
		}
		privateUsers.SetRandomUidRange(user.DefaultRangeCount)
	}

	if len(flagPorts) > 0 && flagNet.None() {
		stderr.Print("--port flag does not work with 'none' networking")
		return 1
	}
	if len(flagPorts) > 0 && flagNet.Host() {
		stderr.Print("--port flag does not work with 'host' networking")
		return 1
	}

	if flagMDSRegister && flagNet.None() {
		stderr.Print("--mds-register flag does not work with --net=none. Please use 'host', 'default' or an equivalent network")
		return 1
	}

	if len(flagPodManifest) > 0 && (len(flagPorts) > 0 || rktApps.Count() > 0 || flagStoreOnly || flagNoStore ||
		flagInheritEnv || !flagExplicitEnv.IsEmpty() || !flagEnvFromFile.IsEmpty() ||
		(*appsVolume)(&rktApps).String() != "" || (*appMount)(&rktApps).String() != "" || (*appExec)(&rktApps).String() != "" ||
		(*appUser)(&rktApps).String() != "" || (*appGroup)(&rktApps).String() != "" ||
		(*appCapsRetain)(&rktApps).String() != "" || (*appCapsRemove)(&rktApps).String() != "") {
		stderr.Print("conflicting flags set with --pod-manifest (see --help)")
		return 1
	}

	if flagInteractive && rktApps.Count() > 1 {
		stderr.Print("interactive option only supports one image")
		return 1
	}

	if rktApps.Count() < 1 && len(flagPodManifest) == 0 {
		stderr.Print("must provide at least one image or specify the pod manifest")
		return 1
	}

	s, err := imagestore.NewStore(storeDir())
	if err != nil {
		stderr.PrintE("cannot open store", err)
		return 1
	}

	ts, err := treestore.NewStore(treeStoreDir(), s)
	if err != nil {
		stderr.PrintE("cannot open treestore", err)
		return 1
	}

	config, err := getConfig()
	if err != nil {
		stderr.PrintE("cannot get configuration", err)
		return 1
	}

	s1img, err := getStage1Hash(s, ts, config)
	if err != nil {
		stderr.Error(err)
		return 1
	}

	fn := &image.Finder{
		S:                  s,
		Ts:                 ts,
		Ks:                 getKeystore(),
		Headers:            config.AuthPerHost,
		DockerAuth:         config.DockerCredentialsPerRegistry,
		InsecureFlags:      globalFlags.InsecureFlags,
		Debug:              globalFlags.Debug,
		TrustKeysFromHTTPS: globalFlags.TrustKeysFromHTTPS,

		StoreOnly: flagStoreOnly,
		NoStore:   flagNoStore,
		WithDeps:  true,
	}
	if err := fn.FindImages(&rktApps); err != nil {
		stderr.Error(err)
		return 1
	}

	p, err := newPod()
	if err != nil {
		stderr.PrintE("error creating new pod", err)
		return 1
	}

	// if requested, write out pod UUID early so "rkt rm" can
	// clean it up even if something goes wrong
	if flagUUIDFileSave != "" {
		if err := writeUUIDToFile(p.uuid, flagUUIDFileSave); err != nil {
			stderr.PrintE("error saving pod UUID to file", err)
			return 1
		}
	}

	processLabel, mountLabel, err := label.InitLabels([]string{"mcsdir:/var/run/rkt/mcs"})
	if err != nil {
		stderr.PrintE("error initialising SELinux", err)
		return 1
	}

	p.mountLabel = mountLabel

	cfg := stage0.CommonConfig{
		MountLabel:   mountLabel,
		ProcessLabel: processLabel,
		Store:        s,
		TreeStore:    ts,
		Stage1Image:  *s1img,
		UUID:         p.uuid,
		Debug:        globalFlags.Debug,
	}

	pcfg := stage0.PrepareConfig{
		CommonConfig:       &cfg,
		UseOverlay:         !flagNoOverlay && common.SupportsOverlay() && common.FSSupportsOverlay(getDataDir()),
		PrivateUsers:       privateUsers,
		SkipTreeStoreCheck: globalFlags.InsecureFlags.SkipOnDiskCheck(),
	}

	if len(flagPodManifest) > 0 {
		pcfg.PodManifest = flagPodManifest
	} else {
		pcfg.Ports = []types.ExposedPort(flagPorts)
		pcfg.InheritEnv = flagInheritEnv
		pcfg.ExplicitEnv = flagExplicitEnv.Strings()
		pcfg.EnvFromFile = flagEnvFromFile.Strings()
		pcfg.Apps = &rktApps
	}

	if globalFlags.Debug {
		stage0.InitDebug()
	}

	keyLock, err := lock.SharedKeyLock(lockDir(), common.PrepareLock)
	if err != nil {
		stderr.PrintE("cannot get shared prepare lock", err)
		return 1
	}
	err = stage0.Prepare(pcfg, p.path(), p.uuid)
	if err != nil {
		stderr.PrintE("error setting up stage0", err)
		keyLock.Close()
		return 1
	}
	keyLock.Close()

	// get the lock fd for run
	lfd, err := p.Fd()
	if err != nil {
		stderr.PrintE("error getting pod lock fd", err)
		return 1
	}

	// skip prepared by jumping directly to run, we own this pod
	if err := p.xToRun(); err != nil {
		stderr.PrintE("unable to transition to run", err)
		return 1
	}

	rktgid, err := common.LookupGid(common.RktGroup)
	if err != nil {
		stderr.Printf("group %q not found, will use default gid when rendering images", common.RktGroup)
		rktgid = -1
	}

	rcfg := stage0.RunConfig{
		CommonConfig: &cfg,
		Net:          flagNet,
		LockFd:       lfd,
		Interactive:  flagInteractive,
		DNS:          flagDNS,
		DNSSearch:    flagDNSSearch,
		DNSOpt:       flagDNSOpt,
		MDSRegister:  flagMDSRegister,
		LocalConfig:  globalFlags.LocalConfigDir,
		RktGid:       rktgid,
		Hostname:     flagHostname,
	}

	apps, err := p.getApps()
	if err != nil {
		stderr.PrintE("cannot get the appList in the pod manifest", err)
		return 1
	}
	rcfg.Apps = apps
	stage0.Run(rcfg, p.path(), getDataDir()) // execs, never returns

	return 1
}
Example #2
0
File: prepare.go Project: nak3/rkt
func runPrepare(cmd *cobra.Command, args []string) (exit int) {
	var err error
	origStdout := os.Stdout
	privateUsers := user.NewBlankUidRange()
	if flagQuiet {
		if os.Stdout, err = os.Open("/dev/null"); err != nil {
			stderr.PrintE("unable to open /dev/null", err)
			return 1
		}
	}

	if flagStoreOnly && flagNoStore {
		stderr.Print("both --store-only and --no-store specified")
		return 1
	}

	if flagPrivateUsers {
		if !common.SupportsUserNS() {
			stderr.Print("--private-users is not supported, kernel compiled without user namespace support")
			return 1
		}
		privateUsers.SetRandomUidRange(user.DefaultRangeCount)
	}

	if err = parseApps(&rktApps, args, cmd.Flags(), true); err != nil {
		stderr.PrintE("error parsing app image arguments", err)
		return 1
	}

	if len(flagPodManifest) > 0 && (len(flagPorts) > 0 || flagStoreOnly || flagNoStore ||
		flagInheritEnv || !flagExplicitEnv.IsEmpty() || !flagEnvFromFile.IsEmpty() ||
		(*appsVolume)(&rktApps).String() != "" || (*appMount)(&rktApps).String() != "" || (*appExec)(&rktApps).String() != "" ||
		(*appUser)(&rktApps).String() != "" || (*appGroup)(&rktApps).String() != "" ||
		(*appCapsRetain)(&rktApps).String() != "" || (*appCapsRemove)(&rktApps).String() != "") {
		stderr.Print("conflicting flags set with --pod-manifest (see --help)")
		return 1
	}

	if rktApps.Count() < 1 && len(flagPodManifest) == 0 {
		stderr.Print("must provide at least one image or specify the pod manifest")
		return 1
	}

	s, err := imagestore.NewStore(storeDir())
	if err != nil {
		stderr.PrintE("cannot open store", err)
		return 1
	}

	ts, err := treestore.NewStore(treeStoreDir(), s)
	if err != nil {
		stderr.PrintE("cannot open treestore", err)
		return 1
	}

	config, err := getConfig()
	if err != nil {
		stderr.PrintE("cannot get configuration", err)
		return 1
	}

	s1img, err := getStage1Hash(s, ts, config)
	if err != nil {
		stderr.Error(err)
		return 1
	}

	fn := &image.Finder{
		S:                  s,
		Ts:                 ts,
		Ks:                 getKeystore(),
		Headers:            config.AuthPerHost,
		DockerAuth:         config.DockerCredentialsPerRegistry,
		InsecureFlags:      globalFlags.InsecureFlags,
		Debug:              globalFlags.Debug,
		TrustKeysFromHTTPS: globalFlags.TrustKeysFromHTTPS,

		StoreOnly: flagStoreOnly,
		NoStore:   flagNoStore,
		WithDeps:  true,
	}
	if err := fn.FindImages(&rktApps); err != nil {
		stderr.PrintE("error finding images", err)
		return 1
	}

	p, err := newPod()
	if err != nil {
		stderr.PrintE("error creating new pod", err)
		return 1
	}

	cfg := stage0.CommonConfig{
		Store:       s,
		TreeStore:   ts,
		Stage1Image: *s1img,
		UUID:        p.uuid,
		Debug:       globalFlags.Debug,
	}

	pcfg := stage0.PrepareConfig{
		CommonConfig:       &cfg,
		UseOverlay:         !flagNoOverlay && common.SupportsOverlay() && common.FSSupportsOverlay(getDataDir()),
		PrivateUsers:       privateUsers,
		SkipTreeStoreCheck: globalFlags.InsecureFlags.SkipOnDiskCheck(),
	}

	if len(flagPodManifest) > 0 {
		pcfg.PodManifest = flagPodManifest
	} else {
		pcfg.Ports = []types.ExposedPort(flagPorts)
		pcfg.InheritEnv = flagInheritEnv
		pcfg.ExplicitEnv = flagExplicitEnv.Strings()
		pcfg.EnvFromFile = flagEnvFromFile.Strings()
		pcfg.Apps = &rktApps
	}

	if globalFlags.Debug {
		stage0.InitDebug()
	}

	keyLock, err := lock.SharedKeyLock(lockDir(), common.PrepareLock)
	if err != nil {
		stderr.PrintE("cannot get shared prepare lock", err)
		return 1
	}
	if err = stage0.Prepare(pcfg, p.path(), p.uuid); err != nil {
		stderr.PrintE("error setting up stage0", err)
		keyLock.Close()
		return 1
	}
	keyLock.Close()

	if err := p.sync(); err != nil {
		stderr.PrintE("error syncing pod data", err)
		return 1
	}

	if err := p.xToPrepared(); err != nil {
		stderr.PrintE("error transitioning to prepared", err)
		return 1
	}

	os.Stdout = origStdout // restore output in case of --quiet
	stdout.Printf("%s", p.uuid.String())

	return 0
}