// AppsForPod returns the apps of the pod with the given uuid in the given data directory.
// If appName is non-empty, then only the app with the given name will be returned.
func AppsForPod(uuid, dataDir string, appName string) ([]*App, error) {
p, err := pkgPod.PodFromUUIDString(dataDir, uuid)
if err != nil {
return nil, err
}
defer p.Close()
_, podManifest, err := p.PodManifest()
if err != nil {
return nil, err
}
var apps []*App
for _, ra := range podManifest.Apps {
if appName != "" && appName != ra.Name.String() {
continue
}
app, err := newApp(&ra, podManifest, p)
if err != nil {
fmt.Fprintf(os.Stderr, "Cannot get app status: %v", err)
continue
}
apps = append(apps, app)
}
return apps, nil
}
func runStatus(cmd *cobra.Command, args []string) (exit int) {
if len(args) != 1 {
cmd.Usage()
return 254
}
p, err := pkgPod.PodFromUUIDString(getDataDir(), args[0])
if err != nil {
stderr.PrintE("problem retrieving pod", err)
return 254
}
defer p.Close()
if flagWait {
if err := p.WaitExited(); err != nil {
stderr.PrintE("unable to wait for pod", err)
return 254
}
}
if err = printStatus(p); err != nil {
stderr.PrintE("unable to print status", err)
return 254
}
return 0
}
func runAppStart(cmd *cobra.Command, args []string) (exit int) {
if len(args) < 1 {
stderr.Print("must provide the pod UUID")
return 1
}
if flagAppName == "" {
stderr.Print("must provide the app to start")
return 1
}
p, err := pkgPod.PodFromUUIDString(getDataDir(), args[0])
if err != nil {
stderr.PrintE("problem retrieving pod", err)
return 1
}
defer p.Close()
if p.State() != pkgPod.Running {
stderr.Printf("pod %q isn't currently running", p.UUID)
return 1
}
appName, err := types.NewACName(flagAppName)
if err != nil {
stderr.PrintE("invalid app name", err)
}
podPID, err := p.ContainerPid1()
if err != nil {
stderr.PrintE(fmt.Sprintf("unable to determine the pid for pod %q", p.UUID), err)
return 1
}
cfg := stage0.CommonConfig{
DataDir: getDataDir(),
UUID: p.UUID,
Debug: globalFlags.Debug,
}
scfg := stage0.StartConfig{
CommonConfig: &cfg,
PodPath: p.Path(),
AppName: appName,
PodPID: podPID,
}
if globalFlags.Debug {
stage0.InitDebug()
}
err = stage0.StartApp(scfg)
if err != nil {
stderr.PrintE("error starting app", err)
return 1
}
return 0
}
func runStop(cmd *cobra.Command, args []string) (exit int) {
var podUUIDs []string
var errors int
ret := 0
switch {
case len(args) == 0 && flagUUIDFile != "":
podUUID, err := pkgPod.ReadUUIDFromFile(flagUUIDFile)
if err != nil {
stderr.PrintE("unable to resolve UUID from file", err)
ret = 1
} else {
podUUIDs = append(podUUIDs, podUUID)
}
case len(args) > 0 && flagUUIDFile == "":
podUUIDs = args
default:
cmd.Usage()
return 254
}
for _, podUUID := range podUUIDs {
p, err := pkgPod.PodFromUUIDString(getDataDir(), podUUID)
if err != nil {
errors++
stderr.PrintE("cannot get pod", err)
continue
}
if p.AfterRun() {
stdout.Printf("pod %q is already stopped", p.UUID)
continue
}
if p.State() != pkgPod.Running {
stderr.Error(fmt.Errorf("pod %q is not running", p.UUID))
errors++
continue
}
if err := stage0.StopPod(p.Path(), flagForce, p.UUID); err == nil {
stdout.Printf("%q", p.UUID)
} else {
stderr.PrintE(fmt.Sprintf("error stopping %q", p.UUID), err)
errors++
}
}
if errors > 0 {
stderr.Error(fmt.Errorf("failed to stop %d pod(s)", errors))
return 254
}
return ret
}
func StopApp(cfg StopConfig) error {
pod, err := pkgPod.PodFromUUIDString(cfg.DataDir, cfg.UUID.String())
if err != nil {
return errwrap.Wrap(errors.New("error loading pod manifest"), err)
}
defer pod.Close()
_, pm, err := pod.PodManifest()
if err != nil {
return errwrap.Wrap(errors.New("error loading pod manifest"), err)
}
var mutable bool
ms, ok := pm.Annotations.Get("coreos.com/rkt/stage1/mutable")
if ok {
mutable, err = strconv.ParseBool(ms)
if err != nil {
return errwrap.Wrap(errors.New("error parsing mutable annotation"), err)
}
}
if !mutable {
return errors.New("immutable pod: cannot start application")
}
app := pm.Apps.Get(*cfg.AppName)
if app == nil {
return fmt.Errorf("error: nonexistent app %q", *cfg.AppName)
}
args := []string{
fmt.Sprintf("--app=%s", cfg.AppName),
}
ce := CrossingEntrypoint{
PodPath: cfg.PodPath,
PodPID: cfg.PodPID,
AppName: cfg.AppName.String(),
EntrypointName: appStopEntrypoint,
EntrypointArgs: args,
Interactive: false,
}
if err := ce.Run(); err != nil {
status, err := common.GetExitStatus(err)
// exit status 5 comes from systemctl and means the unit doesn't exist
if status == 5 {
return fmt.Errorf("app %q is not running", app.Name)
}
return err
}
return nil
}
func StartApp(cfg StartConfig) error {
pod, err := pkgPod.PodFromUUIDString(cfg.DataDir, cfg.UUID.String())
if err != nil {
return errwrap.Wrap(errors.New("error loading pod"), err)
}
defer pod.Close()
_, pm, err := pod.PodManifest()
if err != nil {
return errwrap.Wrap(errors.New("error loading pod manifest"), err)
}
var mutable bool
ms, ok := pm.Annotations.Get("coreos.com/rkt/stage1/mutable")
if ok {
mutable, err = strconv.ParseBool(ms)
if err != nil {
return errwrap.Wrap(errors.New("error parsing mutable annotation"), err)
}
}
if !mutable {
return errors.New("immutable pod: cannot start application")
}
app := pm.Apps.Get(*cfg.AppName)
if app == nil {
return fmt.Errorf("error: nonexistent app %q", *cfg.AppName)
}
args := []string{
fmt.Sprintf("--app=%s", cfg.AppName),
}
if _, err := os.Create(common.AppStartedPath(cfg.PodPath, cfg.AppName.String())); err != nil {
log.FatalE(fmt.Sprintf("error creating %s-started file", cfg.AppName.String()), err)
}
ce := CrossingEntrypoint{
PodPath: cfg.PodPath,
PodPID: cfg.PodPID,
AppName: cfg.AppName.String(),
EntrypointName: appStartEntrypoint,
EntrypointArgs: args,
Interactive: false,
}
if err := ce.Run(); err != nil {
return err
}
return nil
}
func (s *v1AlphaAPIServer) InspectPod(ctx context.Context, request *v1alpha.InspectPodRequest) (*v1alpha.InspectPodResponse, error) {
p, err := pkgPod.PodFromUUIDString(getDataDir(), request.Id)
if err != nil {
stderr.PrintE(fmt.Sprintf("failed to get pod %q", request.Id), err)
return nil, err
}
defer p.Close()
pod := s.getBasicPod(p)
fillPodDetails(s.store, p, pod)
return &v1alpha.InspectPodResponse{Pod: pod}, nil
}
func (s *v1AlphaAPIServer) constrainedGetLogs(request *v1alpha.GetLogsRequest, server v1alpha.PublicAPI_GetLogsServer) error {
pod, err := pkgPod.PodFromUUIDString(getDataDir(), request.PodId)
if err != nil {
return err
}
defer pod.Close()
path, err := pod.JournalLogPath()
if _, err := os.Stat(path); os.IsNotExist(err) {
return fmt.Errorf("logging unsupported for pod %q", request.PodId)
}
jconf := sdjournal.JournalReaderConfig{
Path: path,
}
if request.AppName != "" {
jconf.Matches = []sdjournal.Match{
{
Field: sdjournal.SD_JOURNAL_FIELD_SYSLOG_IDENTIFIER,
Value: request.AppName,
},
}
}
if request.SinceTime != 0 {
t := time.Unix(request.SinceTime, 0)
jconf.Since = -time.Since(t)
}
if request.Lines != 0 {
jconf.NumFromTail = uint64(request.Lines)
}
jr, err := sdjournal.NewJournalReader(jconf)
if err != nil {
return err
}
defer jr.Close()
if request.Follow {
return jr.Follow(nil, LogsStreamWriter{server: server})
}
data, err := ioutil.ReadAll(jr)
if err != nil {
return err
}
return server.Send(&v1alpha.GetLogsResponse{Lines: common.RemoveEmptyLines(string(data))})
}
func runStatus(cmd *cobra.Command, args []string) (exit int) {
if len(args) != 1 {
cmd.Usage()
return 254
}
dWait, err := parseDuration(flagWait)
if err != nil {
cmd.Usage()
return 254
}
dReady, err := parseDuration(flagWaitReady)
if err != nil {
cmd.Usage()
return 254
}
p, err := pkgPod.PodFromUUIDString(getDataDir(), args[0])
if err != nil {
stderr.PrintE("problem retrieving pod", err)
return 254
}
defer p.Close()
if dReady != 0 {
if err := p.WaitReady(newContext(dReady)); err != nil {
stderr.PrintE("error waiting for pod readiness", err)
return 254
}
}
if dWait != 0 {
if err := p.WaitFinished(newContext(dWait)); err != nil {
stderr.PrintE("error waiting for pod to finish", err)
return 254
}
}
if err = printStatus(p); err != nil {
stderr.PrintE("unable to print status", err)
return 254
}
return 0
}
func StopApp(cfg StopConfig) error {
pod, err := pkgPod.PodFromUUIDString(cfg.DataDir, cfg.UUID.String())
if err != nil {
return errwrap.Wrap(errors.New("error loading pod manifest"), err)
}
defer pod.Close()
pm, err := pod.SandboxManifest()
if err != nil {
return errwrap.Wrap(errors.New("cannot stop application"), err)
}
app := pm.Apps.Get(*cfg.AppName)
if app == nil {
return fmt.Errorf("error: nonexistent app %q", *cfg.AppName)
}
args := []string{
fmt.Sprintf("--debug=%t", cfg.Debug),
fmt.Sprintf("--app=%s", cfg.AppName),
}
ce := CrossingEntrypoint{
PodPath: cfg.PodPath,
PodPID: cfg.PodPID,
AppName: cfg.AppName.String(),
EntrypointName: appStopEntrypoint,
EntrypointArgs: args,
Interactive: false,
}
if err := ce.Run(); err != nil {
status, err := common.GetExitStatus(err)
// exit status 5 comes from systemctl and means the unit doesn't exist
if status == 5 {
return fmt.Errorf("app %q is not running", app.Name)
}
return err
}
return nil
}
func StartApp(cfg StartConfig) error {
pod, err := pkgPod.PodFromUUIDString(cfg.DataDir, cfg.UUID.String())
if err != nil {
return errwrap.Wrap(errors.New("error loading pod"), err)
}
defer pod.Close()
pm, err := pod.SandboxManifest()
if err != nil {
return errwrap.Wrap(errors.New("cannot start application"), err)
}
app := pm.Apps.Get(*cfg.AppName)
if app == nil {
return fmt.Errorf("error: nonexistent app %q", *cfg.AppName)
}
args := []string{
fmt.Sprintf("--debug=%t", cfg.Debug),
fmt.Sprintf("--app=%s", cfg.AppName),
}
if _, err := os.Create(common.AppStartedPath(cfg.PodPath, cfg.AppName.String())); err != nil {
log.FatalE(fmt.Sprintf("error creating %s-started file", cfg.AppName.String()), err)
}
ce := CrossingEntrypoint{
PodPath: cfg.PodPath,
PodPID: cfg.PodPID,
AppName: cfg.AppName.String(),
EntrypointName: appStartEntrypoint,
EntrypointArgs: args,
Interactive: false,
}
if err := ce.Run(); err != nil {
return err
}
return nil
}
func RmApp(cfg RmConfig) error {
pod, err := pkgPod.PodFromUUIDString(cfg.DataDir, cfg.UUID.String())
if err != nil {
return errwrap.Wrap(errors.New("error loading pod"), err)
}
defer pod.Close()
debug("locking sandbox manifest")
if err := pod.ExclusiveLockManifest(); err != nil {
return errwrap.Wrap(errors.New("failed to lock sandbox manifest"), err)
}
defer pod.UnlockManifest()
pm, err := pod.SandboxManifest()
if err != nil {
return errwrap.Wrap(errors.New("cannot remove application, sandbox validation failed"), err)
}
app := pm.Apps.Get(*cfg.AppName)
if app == nil {
return fmt.Errorf("error: nonexistent app %q", *cfg.AppName)
}
if cfg.PodPID > 0 {
// Call app-stop and app-rm entrypoint only if the pod is still running.
// Otherwise, there's not much we can do about it except unmounting/removing
// the file system.
args := []string{
fmt.Sprintf("--debug=%t", cfg.Debug),
fmt.Sprintf("--app=%s", cfg.AppName),
}
ce := CrossingEntrypoint{
PodPath: cfg.PodPath,
PodPID: cfg.PodPID,
AppName: cfg.AppName.String(),
EntrypointName: appStopEntrypoint,
EntrypointArgs: args,
Interactive: false,
}
if err := ce.Run(); err != nil {
status, err := common.GetExitStatus(err)
// ignore nonexistent units failing to stop. Exit status 5
// comes from systemctl and means the unit doesn't exist
if err != nil {
return err
} else if status != 5 {
return fmt.Errorf("exit status %d", status)
}
}
ce.EntrypointName = appRmEntrypoint
if err := ce.Run(); err != nil {
return err
}
}
if cfg.UsesOverlay {
treeStoreID, err := ioutil.ReadFile(common.AppTreeStoreIDPath(cfg.PodPath, *cfg.AppName))
if err != nil {
return err
}
appRootfs := common.AppRootfsPath(cfg.PodPath, *cfg.AppName)
if err := syscall.Unmount(appRootfs, 0); err != nil {
return err
}
ts := filepath.Join(cfg.PodPath, "overlay", string(treeStoreID))
if err := os.RemoveAll(ts); err != nil {
return errwrap.Wrap(errors.New("error removing app info directory"), err)
}
}
appInfoDir := common.AppInfoPath(cfg.PodPath, *cfg.AppName)
if err := os.RemoveAll(appInfoDir); err != nil {
return errwrap.Wrap(errors.New("error removing app info directory"), err)
}
if err := os.RemoveAll(common.AppPath(cfg.PodPath, *cfg.AppName)); err != nil {
return err
}
appStatusPath := filepath.Join(common.Stage1RootfsPath(cfg.PodPath), "rkt", "status", cfg.AppName.String())
if err := os.Remove(appStatusPath); err != nil && !os.IsNotExist(err) {
return err
}
envPath := filepath.Join(common.Stage1RootfsPath(cfg.PodPath), "rkt", "env", cfg.AppName.String())
if err := os.Remove(envPath); err != nil && !os.IsNotExist(err) {
return err
}
for i, app := range pm.Apps {
if app.Name == *cfg.AppName {
pm.Apps = append(pm.Apps[:i], pm.Apps[i+1:]...)
break
}
}
return pod.UpdateManifest(pm, cfg.PodPath)
}
func runAppAdd(cmd *cobra.Command, args []string) (exit int) {
if len(args) < 2 {
stderr.Print("must provide the pod UUID and an IMAGEID")
return 254
}
err := parseApps(&rktApps, args[1:], cmd.Flags(), true)
if err != nil {
stderr.PrintE("error parsing app image arguments", err)
return 254
}
if rktApps.Count() > 1 {
stderr.Print("must give only one app")
return 254
}
p, err := pkgPod.PodFromUUIDString(getDataDir(), args[0])
if err != nil {
stderr.PrintE("problem retrieving pod", err)
return 254
}
defer p.Close()
if p.State() != pkgPod.Running {
stderr.Printf("pod %q isn't currently running", p.UUID)
return 254
}
if !p.IsSupervisorReady() {
stderr.Printf("supervisor for pod %q is not yet ready", p.UUID)
return 254
}
s, err := imagestore.NewStore(storeDir())
if err != nil {
stderr.PrintE("cannot open store", err)
return 254
}
ts, err := treestore.NewStore(treeStoreDir(), s)
if err != nil {
stderr.PrintE("cannot open treestore", err)
return 254
}
fn := &image.Finder{
S: s,
Ts: ts,
Ks: getKeystore(),
StoreOnly: true,
NoStore: false,
}
img, err := fn.FindImage(args[1], "")
if err != nil {
stderr.PrintE("error finding images", err)
return 254
}
podPID, err := p.ContainerPid1()
if err != nil {
stderr.PrintE(fmt.Sprintf("unable to determine the pid for pod %q", p.UUID), err)
return 254
}
ccfg := stage0.CommonConfig{
DataDir: getDataDir(),
Store: s,
TreeStore: ts,
UUID: p.UUID,
Debug: globalFlags.Debug,
}
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
}
cfg := stage0.AddConfig{
CommonConfig: &ccfg,
Image: *img,
Apps: &rktApps,
RktGid: rktgid,
UsesOverlay: p.UsesOverlay(),
PodPath: p.Path(),
PodPID: podPID,
}
if globalFlags.Debug {
stage0.InitDebug()
}
err = stage0.AddApp(cfg)
if err != nil {
stderr.PrintE("error adding app to pod", err)
return 254
}
return 0
}
func runRunPrepared(cmd *cobra.Command, args []string) (exit int) {
if len(args) != 1 {
cmd.Usage()
return 254
}
p, err := pkgPod.PodFromUUIDString(getDataDir(), args[0])
if err != nil {
stderr.PrintE("problem retrieving pod", err)
return 254
}
defer p.Close()
s, err := imagestore.NewStore(storeDir())
if err != nil {
stderr.PrintE("cannot open store", err)
return 254
}
ts, err := treestore.NewStore(treeStoreDir(), s)
if err != nil {
stderr.PrintE("cannot open treestore", err)
return 254
}
if p.State() != pkgPod.Prepared {
stderr.Printf("pod %q is not prepared", p.UUID)
return 254
}
_, manifest, err := p.PodManifest()
if err != nil {
stderr.PrintE("cannot read pod manifest", err)
return 254
}
if flagInteractive {
if len(manifest.Apps) > 1 {
stderr.Print("interactive option only supports pods with one app")
return 254
}
}
// Make sure we have a metadata service available before we move to
// run state so that the user can rerun the command without needing
// to prepare the image again.
if flagMDSRegister {
if err := stage0.CheckMdsAvailability(); err != nil {
stderr.Error(err)
return 254
}
}
if err := p.ToRun(); err != nil {
stderr.PrintE("cannot transition to run", err)
return 254
}
lfd, err := p.Fd()
if err != nil {
stderr.PrintE("unable to get lock fd", err)
return 254
}
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
}
ovlOk := true
if err := common.PathSupportsOverlay(getDataDir()); err != nil {
if oerr, ok := err.(common.ErrOverlayUnsupported); ok {
stderr.Printf("disabling overlay support: %q", oerr.Error())
ovlOk = false
} else {
stderr.PrintE("error determining overlay support", err)
return 254
}
}
ovlPrep := p.UsesOverlay()
// should not happen, maybe the data directory moved from an overlay-enabled fs to another location
// between prepare and run-prepared
if ovlPrep && !ovlOk {
stderr.Print("unable to run prepared overlay-enabled pod: overlay not supported")
return 254
}
DNSConfMode, DNSConfig, HostsEntries, err := parseDNSFlags(flagHostsEntries, flagDNS, flagDNSSearch, flagDNSOpt, flagDNSDomain)
if err != nil {
stderr.PrintE("error with dns flags", err)
return 254
}
rcfg := stage0.RunConfig{
CommonConfig: &stage0.CommonConfig{
DataDir: getDataDir(),
Store: s,
TreeStore: ts,
UUID: p.UUID,
Debug: globalFlags.Debug,
},
Net: flagNet,
LockFd: lfd,
Interactive: flagInteractive,
DNSConfMode: DNSConfMode,
DNSConfig: DNSConfig,
HostsEntries: *HostsEntries,
MDSRegister: flagMDSRegister,
Apps: manifest.Apps,
RktGid: rktgid,
Hostname: flagHostname,
InsecureCapabilities: globalFlags.InsecureFlags.SkipCapabilities(),
InsecurePaths: globalFlags.InsecureFlags.SkipPaths(),
InsecureSeccomp: globalFlags.InsecureFlags.SkipSeccomp(),
UseOverlay: ovlPrep && ovlOk,
}
if globalFlags.Debug {
stage0.InitDebug()
}
stage0.Run(rcfg, p.Path(), getDataDir()) // execs, never returns
return 254
}
func runEnter(cmd *cobra.Command, args []string) (exit int) {
if len(args) < 1 {
cmd.Usage()
return 254
}
p, err := pkgPod.PodFromUUIDString(getDataDir(), args[0])
if err != nil {
stderr.PrintE("problem retrieving pod", err)
return 254
}
defer p.Close()
if p.State() != pkgPod.Running {
stderr.Printf("pod %q isn't currently running", p.UUID)
return 254
}
podPID, err := p.ContainerPid1()
if err != nil {
stderr.PrintE(fmt.Sprintf("unable to determine the pid for pod %q", p.UUID), err)
return 254
}
appName, err := getAppName(p)
if err != nil {
stderr.PrintE("unable to determine app name", err)
return 254
}
argv, err := getEnterArgv(p, args)
if err != nil {
stderr.PrintE("enter failed", err)
return 254
}
s, err := imagestore.NewStore(storeDir())
if err != nil {
stderr.PrintE("cannot open store", err)
return 254
}
ts, err := treestore.NewStore(treeStoreDir(), s)
if err != nil {
stderr.PrintE("cannot open store", err)
return 254
}
stage1TreeStoreID, err := p.GetStage1TreeStoreID()
if err != nil {
stderr.PrintE("error getting stage1 treeStoreID", err)
return 254
}
stage1RootFS := ts.GetRootFS(stage1TreeStoreID)
if err = stage0.Enter(p.Path(), podPID, *appName, stage1RootFS, argv); err != nil {
stderr.PrintE("enter failed", err)
return 254
}
// not reached when stage0.Enter execs /enter
return 0
}
func AddApp(cfg AddConfig) error {
// there should be only one app in the config
app := cfg.Apps.Last()
if app == nil {
return errors.New("no image specified")
}
am, err := cfg.Store.GetImageManifest(cfg.Image.String())
if err != nil {
return err
}
var appName *types.ACName
if app.Name != "" {
appName, err = types.NewACName(app.Name)
if err != nil {
return err
}
} else {
appName, err = imageNameToAppName(am.Name)
if err != nil {
return err
}
}
pod, err := pkgPod.PodFromUUIDString(cfg.DataDir, cfg.UUID.String())
if err != nil {
return errwrap.Wrap(errors.New("error loading pod"), err)
}
defer pod.Close()
debug("locking pod manifest")
if err := pod.ExclusiveLockManifest(); err != nil {
return errwrap.Wrap(errors.New("failed to lock pod manifest"), err)
}
defer pod.UnlockManifest()
pm, err := pod.SandboxManifest()
if err != nil {
return errwrap.Wrap(errors.New("cannot add application"), err)
}
if pm.Apps.Get(*appName) != nil {
return fmt.Errorf("error: multiple apps with name %s", *appName)
}
if am.App == nil && app.Exec == "" {
return fmt.Errorf("error: image %s has no app section and --exec argument is not provided", cfg.Image)
}
appInfoDir := common.AppInfoPath(cfg.PodPath, *appName)
if err := os.MkdirAll(appInfoDir, common.DefaultRegularDirPerm); err != nil {
return errwrap.Wrap(errors.New("error creating apps info directory"), err)
}
pcfg := PrepareConfig{
CommonConfig: cfg.CommonConfig,
PrivateUsers: user.NewBlankUidRange(),
}
if cfg.UsesOverlay {
privateUsers, err := preparedWithPrivateUsers(cfg.PodPath)
if err != nil {
log.FatalE("error reading user namespace information", err)
}
if err := pcfg.PrivateUsers.Deserialize([]byte(privateUsers)); err != nil {
return err
}
}
treeStoreID, err := prepareAppImage(pcfg, *appName, cfg.Image, cfg.PodPath, cfg.UsesOverlay)
if err != nil {
return errwrap.Wrap(fmt.Errorf("error preparing image %s", cfg.Image), err)
}
rcfg := RunConfig{
CommonConfig: cfg.CommonConfig,
UseOverlay: cfg.UsesOverlay,
RktGid: cfg.RktGid,
}
if err := setupAppImage(rcfg, *appName, cfg.Image, cfg.PodPath, cfg.UsesOverlay); err != nil {
return fmt.Errorf("error setting up app image: %v", err)
}
if cfg.UsesOverlay {
imgDir := filepath.Join(cfg.PodPath, "overlay", treeStoreID)
if err := os.Chown(imgDir, -1, cfg.RktGid); err != nil {
return err
}
}
ra := schema.RuntimeApp{
Name: *appName,
App: am.App,
Image: schema.RuntimeImage{
Name: &am.Name,
ID: cfg.Image,
Labels: am.Labels,
},
Mounts: MergeMounts(cfg.Apps.Mounts, app.Mounts),
ReadOnlyRootFS: app.ReadOnlyRootFS,
}
if app.Exec != "" {
// Create a minimal App section if not present
if am.App == nil {
ra.App = &types.App{
User: strconv.Itoa(os.Getuid()),
Group: strconv.Itoa(os.Getgid()),
}
}
ra.App.Exec = []string{app.Exec}
}
if app.Args != nil {
ra.App.Exec = append(ra.App.Exec, app.Args...)
}
if app.WorkingDir != "" {
ra.App.WorkingDirectory = app.WorkingDir
}
if err := prepareIsolators(app, ra.App); err != nil {
return err
}
if app.User != "" {
ra.App.User = app.User
}
if app.Group != "" {
ra.App.Group = app.Group
}
if app.SupplementaryGIDs != nil {
ra.App.SupplementaryGIDs = app.SupplementaryGIDs
}
if app.UserAnnotations != nil {
ra.App.UserAnnotations = app.UserAnnotations
}
if app.UserLabels != nil {
ra.App.UserLabels = app.UserLabels
}
if app.Environments != nil {
envs := make([]string, 0, len(app.Environments))
for name, value := range app.Environments {
envs = append(envs, fmt.Sprintf("%s=%s", name, value))
}
// Let the app level environment override the environment variables.
mergeEnvs(&ra.App.Environment, envs, true)
}
env := ra.App.Environment
env.Set("AC_APP_NAME", appName.String())
envFilePath := filepath.Join(common.Stage1RootfsPath(cfg.PodPath), "rkt", "env", appName.String())
if err := common.WriteEnvFile(env, pcfg.PrivateUsers, envFilePath); err != nil {
return err
}
debug("adding app to sandbox")
pm.Apps = append(pm.Apps, ra)
if err := pod.UpdateManifest(pm, cfg.PodPath); err != nil {
return err
}
args := []string{
fmt.Sprintf("--debug=%t", cfg.Debug),
fmt.Sprintf("--uuid=%s", cfg.UUID),
fmt.Sprintf("--app=%s", appName),
}
if _, err := os.Create(common.AppCreatedPath(pod.Path(), appName.String())); err != nil {
return err
}
ce := CrossingEntrypoint{
PodPath: cfg.PodPath,
PodPID: cfg.PodPID,
AppName: appName.String(),
EntrypointName: appAddEntrypoint,
EntrypointArgs: args,
Interactive: false,
}
if err := ce.Run(); err != nil {
return err
}
return nil
}
func runExport(cmd *cobra.Command, args []string) (exit int) {
if len(args) != 2 {
cmd.Usage()
return 254
}
outACI := args[1]
ext := filepath.Ext(outACI)
if ext != schema.ACIExtension {
stderr.Printf("extension must be %s (given %s)", schema.ACIExtension, outACI)
return 254
}
p, err := pkgPod.PodFromUUIDString(getDataDir(), args[0])
if err != nil {
stderr.PrintE("problem retrieving pod", err)
return 254
}
defer p.Close()
state := p.State()
if state != pkgPod.Exited && state != pkgPod.ExitedGarbage {
stderr.Print("pod is not exited. Only exited pods can be exported")
return 254
}
app, err := getApp(p)
if err != nil {
stderr.PrintE("unable to find app", err)
return 254
}
root := common.AppPath(p.Path(), app.Name)
manifestPath := filepath.Join(common.AppInfoPath(p.Path(), app.Name), aci.ManifestFile)
if p.UsesOverlay() {
tmpDir := filepath.Join(getDataDir(), "tmp")
if err := os.MkdirAll(tmpDir, common.DefaultRegularDirPerm); err != nil {
stderr.PrintE("unable to create temp directory", err)
return 254
}
podDir, err := ioutil.TempDir(tmpDir, fmt.Sprintf("rkt-export-%s", p.UUID))
if err != nil {
stderr.PrintE("unable to create export temp directory", err)
return 254
}
defer func() {
if err := os.RemoveAll(podDir); err != nil {
stderr.PrintE("problem removing temp directory", err)
exit = 1
}
}()
mntDir := filepath.Join(podDir, "rootfs")
if err := os.Mkdir(mntDir, common.DefaultRegularDirPerm); err != nil {
stderr.PrintE("unable to create rootfs directory inside temp directory", err)
return 254
}
if err := mountOverlay(p, app, mntDir); err != nil {
stderr.PrintE(fmt.Sprintf("couldn't mount directory at %s", mntDir), err)
return 254
}
defer func() {
if err := syscall.Unmount(mntDir, 0); err != nil {
stderr.PrintE(fmt.Sprintf("error unmounting directory %s", mntDir), err)
exit = 1
}
}()
root = podDir
} else {
hasMPs, err := appHasMountpoints(p.Path(), app.Name)
if err != nil {
stderr.PrintE("error parsing mountpoints", err)
return 254
}
if hasMPs {
stderr.Printf("pod has remaining mountpoints. Only pods using overlayfs or with no mountpoints can be exported")
return 254
}
}
// Check for user namespace (--private-user), if in use get uidRange
var uidRange *user.UidRange
privUserFile := filepath.Join(p.Path(), common.PrivateUsersPreparedFilename)
privUserContent, err := ioutil.ReadFile(privUserFile)
if err == nil {
uidRange = user.NewBlankUidRange()
// The file was found, save uid & gid shift and count
if err := uidRange.Deserialize(privUserContent); err != nil {
stderr.PrintE(fmt.Sprintf("problem deserializing the content of %s", common.PrivateUsersPreparedFilename), err)
return 254
}
}
if err = buildAci(root, manifestPath, outACI, uidRange); err != nil {
stderr.PrintE("error building aci", err)
return 254
}
return 0
}
func RmApp(cfg RmConfig) error {
pod, err := pkgPod.PodFromUUIDString(cfg.DataDir, cfg.UUID.String())
if err != nil {
return errwrap.Wrap(errors.New("error loading pod"), err)
}
defer pod.Close()
debug("locking pod manifest")
if err := pod.ExclusiveManifestLock(); err != nil {
return errwrap.Wrap(errors.New("failed to lock pod manifest"), err)
}
defer pod.ManifestUnlock()
_, pm, err := pod.PodManifest()
if err != nil {
return errwrap.Wrap(errors.New("error loading pod manifest"), err)
}
var mutable bool
ms, ok := pm.Annotations.Get("coreos.com/rkt/stage1/mutable")
if ok {
mutable, err = strconv.ParseBool(ms)
if err != nil {
return errwrap.Wrap(errors.New("error parsing mutable annotation"), err)
}
}
if !mutable {
return errors.New("immutable pod: cannot remove application")
}
app := pm.Apps.Get(*cfg.AppName)
if app == nil {
return fmt.Errorf("error: nonexistent app %q", *cfg.AppName)
}
if cfg.PodPID > 0 {
// Call app-stop and app-rm entrypoint only if the pod is still running.
// Otherwise, there's not much we can do about it except unmounting/removing
// the file system.
args := []string{
fmt.Sprintf("--app=%s", cfg.AppName),
}
ce := CrossingEntrypoint{
PodPath: cfg.PodPath,
PodPID: cfg.PodPID,
AppName: cfg.AppName.String(),
EntrypointName: appStopEntrypoint,
EntrypointArgs: args,
Interactive: false,
}
if err := ce.Run(); err != nil {
status, err := common.GetExitStatus(err)
// ignore nonexistent units failing to stop. Exit status 5
// comes from systemctl and means the unit doesn't exist
if err != nil {
return err
} else if status != 5 {
return fmt.Errorf("exit status %d", status)
}
}
ce.EntrypointName = appRmEntrypoint
if err := ce.Run(); err != nil {
return err
}
}
if cfg.UsesOverlay {
treeStoreID, err := ioutil.ReadFile(common.AppTreeStoreIDPath(cfg.PodPath, *cfg.AppName))
if err != nil {
return err
}
appRootfs := common.AppRootfsPath(cfg.PodPath, *cfg.AppName)
if err := syscall.Unmount(appRootfs, 0); err != nil {
return err
}
ts := filepath.Join(cfg.PodPath, "overlay", string(treeStoreID))
if err := os.RemoveAll(ts); err != nil {
return errwrap.Wrap(errors.New("error removing app info directory"), err)
}
}
appInfoDir := common.AppInfoPath(cfg.PodPath, *cfg.AppName)
if err := os.RemoveAll(appInfoDir); err != nil {
return errwrap.Wrap(errors.New("error removing app info directory"), err)
}
if err := os.RemoveAll(common.AppPath(cfg.PodPath, *cfg.AppName)); err != nil {
return err
}
appStatusPath := filepath.Join(common.Stage1RootfsPath(cfg.PodPath), "rkt", "status", cfg.AppName.String())
if err := os.Remove(appStatusPath); err != nil && !os.IsNotExist(err) {
return err
}
envPath := filepath.Join(common.Stage1RootfsPath(cfg.PodPath), "rkt", "env", cfg.AppName.String())
if err := os.Remove(envPath); err != nil && !os.IsNotExist(err) {
return err
}
removeAppFromPodManifest(pm, cfg.AppName)
if err := updatePodManifest(cfg.PodPath, pm); err != nil {
return err
}
return nil
}
