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Add wait API endpoint for waiting on process exit

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Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
This commit is contained in:
Michael Crosby
2017-09-18 15:54:29 -04:00
parent 2f5dda6229
commit d67763d922
23 changed files with 1314 additions and 355 deletions
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13
linux/process.go
View File

@@ -95,3 +95,16 @@ func (p *Process) Start(ctx context.Context) error {
}
return nil
}
func (p *Process) Wait(ctx context.Context) (*runtime.Exit, error) {
r, err := p.t.shim.Wait(ctx, &shim.WaitRequest{
ID: p.id,
})
if err != nil {
return nil, err
}
return &runtime.Exit{
Timestamp: r.ExitedAt,
Status: r.ExitStatus,
}, nil
}

30
linux/runtime.go
View File

@@ -245,19 +245,22 @@ func (r *Runtime) Create(ctx context.Context, id string, opts runtime.CreateOpts
if err != nil {
return nil, errdefs.FromGRPC(err)
}
t, err := newTask(id, namespace, int(cr.Pid), s)
t, err := newTask(id, namespace, int(cr.Pid), s, r.monitor)
if err != nil {
return nil, err
}
if err := r.tasks.Add(ctx, t); err != nil {
return nil, err
}
// after the task is created, add it to the monitor
if err = r.monitor.Monitor(t); err != nil {
if _, err := r.Delete(ctx, t); err != nil {
log.G(ctx).WithError(err).Error("deleting task after failed monitor")
// after the task is created, add it to the monitor if it has a cgroup
// this can be different on a checkpoint/restore
if t.cg != nil {
if err = r.monitor.Monitor(t); err != nil {
if _, err := r.Delete(ctx, t); err != nil {
log.G(ctx).WithError(err).Error("deleting task after failed monitor")
}
return nil, err
}
return nil, err
}
return t, nil
}
@@ -274,9 +277,17 @@ func (r *Runtime) Delete(ctx context.Context, c runtime.Task) (*runtime.Exit, er
if err := r.monitor.Stop(lc); err != nil {
return nil, err
}
bundle := loadBundle(
lc.id,
filepath.Join(r.state, namespace, lc.id),
filepath.Join(r.root, namespace, lc.id),
)
rsp, err := lc.shim.Delete(ctx, empty)
if err != nil {
if cerr := r.cleanupAfterDeadShim(ctx, bundle, namespace, c.ID(), lc.pid, nil); cerr != nil {
log.G(ctx).WithError(err).Error("unable to cleanup task")
}
return nil, errdefs.FromGRPC(err)
}
r.tasks.Delete(ctx, lc)
@@ -284,11 +295,6 @@ func (r *Runtime) Delete(ctx context.Context, c runtime.Task) (*runtime.Exit, er
log.G(ctx).WithError(err).Error("failed to kill shim")
}
bundle := loadBundle(
lc.id,
filepath.Join(r.state, namespace, lc.id),
filepath.Join(r.root, namespace, lc.id),
)
if err := bundle.Delete(); err != nil {
log.G(ctx).WithError(err).Error("failed to delete bundle")
}
@@ -359,7 +365,7 @@ func (r *Runtime) loadTasks(ctx context.Context, ns string) ([]*Task, error) {
continue
}
t, err := newTask(id, ns, pid, s)
t, err := newTask(id, ns, pid, s, r.monitor)
if err != nil {
log.G(ctx).WithError(err).Error("loading task type")
continue

21
linux/shim/exec.go
View File

@@ -24,7 +24,7 @@ import (
)
type execProcess struct {
sync.WaitGroup
wg sync.WaitGroup
processState
@@ -41,7 +41,8 @@ type execProcess struct {
path string
spec specs.Process
parent *initProcess
parent *initProcess
waitBlock chan struct{}
}
func newExecProcess(context context.Context, path string, r *shimapi.ExecProcessRequest, parent *initProcess, id string) (process, error) {
@@ -66,11 +67,16 @@ func newExecProcess(context context.Context, path string, r *shimapi.ExecProcess
stderr: r.Stderr,
terminal: r.Terminal,
},
waitBlock: make(chan struct{}),
}
e.processState = &execCreatedState{p: e}
return e, nil
}
func (e *execProcess) Wait() {
<-e.waitBlock
}
func (e *execProcess) ID() string {
return e.id
}
@@ -97,13 +103,18 @@ func (e *execProcess) setExited(status int) {
e.status = status
e.exited = time.Now()
e.parent.platform.shutdownConsole(context.Background(), e.console)
e.Wait()
close(e.waitBlock)
}
func (e *execProcess) delete(ctx context.Context) error {
e.wg.Wait()
if e.io != nil {
for _, c := range e.closers {
c.Close()
}
e.io.Close()
}
return nil
}
func (e *execProcess) resize(ws console.WinSize) error {
@@ -175,11 +186,11 @@ func (e *execProcess) start(ctx context.Context) (err error) {
if err != nil {
return errors.Wrap(err, "failed to retrieve console master")
}
if e.console, err = e.parent.platform.copyConsole(ctx, console, e.stdio.stdin, e.stdio.stdout, e.stdio.stderr, &e.WaitGroup, &copyWaitGroup); err != nil {
if e.console, err = e.parent.platform.copyConsole(ctx, console, e.stdio.stdin, e.stdio.stdout, e.stdio.stderr, &e.wg, &copyWaitGroup); err != nil {
return errors.Wrap(err, "failed to start console copy")
}
} else if !e.stdio.isNull() {
if err := copyPipes(ctx, e.io, e.stdio.stdin, e.stdio.stdout, e.stdio.stderr, &e.WaitGroup, &copyWaitGroup); err != nil {
if err := copyPipes(ctx, e.io, e.stdio.stdin, e.stdio.stdout, e.stdio.stderr, &e.wg, &copyWaitGroup); err != nil {
return errors.Wrap(err, "failed to start io pipe copy")
}
}

6
linux/shim/exec_state.go
View File

@@ -46,6 +46,9 @@ func (s *execCreatedState) Start(ctx context.Context) error {
func (s *execCreatedState) Delete(ctx context.Context) error {
s.p.mu.Lock()
defer s.p.mu.Unlock()
if err := s.p.delete(ctx); err != nil {
return err
}
return s.transition("deleted")
}
@@ -151,6 +154,9 @@ func (s *execStoppedState) Start(ctx context.Context) error {
func (s *execStoppedState) Delete(ctx context.Context) error {
s.p.mu.Lock()
defer s.p.mu.Unlock()
if err := s.p.delete(ctx); err != nil {
return err
}
return s.transition("deleted")
}

55
linux/shim/init.go
View File

@@ -30,7 +30,7 @@ import (
const InitPidFile = "init.pid"
type initProcess struct {
sync.WaitGroup
wg sync.WaitGroup
initState
// mu is used to ensure that `Start()` and `Exited()` calls return in
@@ -39,6 +39,8 @@ type initProcess struct {
// the reaper interface.
mu sync.Mutex
waitBlock chan struct{}
workDir string
id string
@@ -113,8 +115,10 @@ func (s *Service) newInitProcess(context context.Context, r *shimapi.CreateTaskR
stderr: r.Stderr,
terminal: r.Terminal,
},
rootfs: rootfs,
workDir: s.config.WorkDir,
rootfs: rootfs,
workDir: s.config.WorkDir,
status: 0,
waitBlock: make(chan struct{}),
}
p.initState = &createdState{p: p}
var (
@@ -149,22 +153,24 @@ func (s *Service) newInitProcess(context context.Context, r *shimapi.CreateTaskR
Detach: true,
NoSubreaper: true,
}
if _, err := p.runtime.Restore(context, r.ID, r.Bundle, opts); err != nil {
return nil, p.runtimeError(err, "OCI runtime restore failed")
}
} else {
opts := &runc.CreateOpts{
PidFile: pidFile,
IO: p.io,
NoPivot: options.NoPivotRoot,
NoNewKeyring: options.NoNewKeyring,
}
if socket != nil {
opts.ConsoleSocket = socket
}
if err := p.runtime.Create(context, r.ID, r.Bundle, opts); err != nil {
return nil, p.runtimeError(err, "OCI runtime create failed")
p.initState = &createdCheckpointState{
p: p,
opts: opts,
}
success = true
return p, nil
}
opts := &runc.CreateOpts{
PidFile: pidFile,
IO: p.io,
NoPivot: options.NoPivotRoot,
NoNewKeyring: options.NoNewKeyring,
}
if socket != nil {
opts.ConsoleSocket = socket
}
if err := p.runtime.Create(context, r.ID, r.Bundle, opts); err != nil {
return nil, p.runtimeError(err, "OCI runtime create failed")
}
if r.Stdin != "" {
sc, err := fifo.OpenFifo(context, r.Stdin, syscall.O_WRONLY|syscall.O_NONBLOCK, 0)
@@ -180,13 +186,13 @@ func (s *Service) newInitProcess(context context.Context, r *shimapi.CreateTaskR
if err != nil {
return nil, errors.Wrap(err, "failed to retrieve console master")
}
console, err = s.platform.copyConsole(context, console, r.Stdin, r.Stdout, r.Stderr, &p.WaitGroup, &copyWaitGroup)
console, err = s.platform.copyConsole(context, console, r.Stdin, r.Stdout, r.Stderr, &p.wg, &copyWaitGroup)
if err != nil {
return nil, errors.Wrap(err, "failed to start console copy")
}
p.console = console
} else if !hasNoIO(r) {
if err := copyPipes(context, p.io, r.Stdin, r.Stdout, r.Stderr, &p.WaitGroup, &copyWaitGroup); err != nil {
if err := copyPipes(context, p.io, r.Stdin, r.Stdout, r.Stderr, &p.wg, &copyWaitGroup); err != nil {
return nil, errors.Wrap(err, "failed to start io pipe copy")
}
}
@@ -201,6 +207,10 @@ func (s *Service) newInitProcess(context context.Context, r *shimapi.CreateTaskR
return p, nil
}
func (p *initProcess) Wait() {
<-p.waitBlock
}
func (p *initProcess) ID() string {
return p.id
}
@@ -240,14 +250,15 @@ func (p *initProcess) start(context context.Context) error {
}
func (p *initProcess) setExited(status int) {
p.status = status
p.exited = time.Now()
p.status = status
p.platform.shutdownConsole(context.Background(), p.console)
close(p.waitBlock)
}
func (p *initProcess) delete(context context.Context) error {
p.killAll(context)
p.Wait()
p.wg.Wait()
err := p.runtime.Delete(context, p.id, nil)
// ignore errors if a runtime has already deleted the process
// but we still hold metadata and pipes

119
linux/shim/init_state.go
View File

@@ -4,10 +4,14 @@ package shim
import (
"context"
"sync"
"syscall"
"github.com/containerd/console"
"github.com/containerd/containerd/errdefs"
shimapi "github.com/containerd/containerd/linux/shim/v1"
"github.com/containerd/fifo"
runc "github.com/containerd/go-runc"
"github.com/pkg/errors"
)
@@ -109,6 +113,120 @@ func (s *createdState) SetExited(status int) {
}
}
type createdCheckpointState struct {
p *initProcess
opts *runc.RestoreOpts
}
func (s *createdCheckpointState) transition(name string) error {
switch name {
case "running":
s.p.initState = &runningState{p: s.p}
case "stopped":
s.p.initState = &stoppedState{p: s.p}
case "deleted":
s.p.initState = &deletedState{}
default:
return errors.Errorf("invalid state transition %q to %q", stateName(s), name)
}
return nil
}
func (s *createdCheckpointState) Pause(ctx context.Context) error {
s.p.mu.Lock()
defer s.p.mu.Unlock()
return errors.Errorf("cannot pause task in created state")
}
func (s *createdCheckpointState) Resume(ctx context.Context) error {
s.p.mu.Lock()
defer s.p.mu.Unlock()
return errors.Errorf("cannot resume task in created state")
}
func (s *createdCheckpointState) Update(context context.Context, r *shimapi.UpdateTaskRequest) error {
s.p.mu.Lock()
defer s.p.mu.Unlock()
return s.p.update(context, r)
}
func (s *createdCheckpointState) Checkpoint(context context.Context, r *shimapi.CheckpointTaskRequest) error {
s.p.mu.Lock()
defer s.p.mu.Unlock()
return errors.Errorf("cannot checkpoint a task in created state")
}
func (s *createdCheckpointState) Resize(ws console.WinSize) error {
s.p.mu.Lock()
defer s.p.mu.Unlock()
return s.p.resize(ws)
}
func (s *createdCheckpointState) Start(ctx context.Context) error {
s.p.mu.Lock()
defer s.p.mu.Unlock()
p := s.p
if _, err := s.p.runtime.Restore(ctx, p.id, p.bundle, s.opts); err != nil {
return p.runtimeError(err, "OCI runtime restore failed")
}
sio := p.stdio
if sio.stdin != "" {
sc, err := fifo.OpenFifo(ctx, sio.stdin, syscall.O_WRONLY|syscall.O_NONBLOCK, 0)
if err != nil {
return errors.Wrapf(err, "failed to open stdin fifo %s", sio.stdin)
}
p.stdin = sc
p.closers = append(p.closers, sc)
}
var copyWaitGroup sync.WaitGroup
if !sio.isNull() {
if err := copyPipes(ctx, p.io, sio.stdin, sio.stdout, sio.stderr, &p.wg, &copyWaitGroup); err != nil {
return errors.Wrap(err, "failed to start io pipe copy")
}
}
copyWaitGroup.Wait()
pid, err := runc.ReadPidFile(s.opts.PidFile)
if err != nil {
return errors.Wrap(err, "failed to retrieve OCI runtime container pid")
}
p.pid = pid
return s.transition("running")
}
func (s *createdCheckpointState) Delete(ctx context.Context) error {
s.p.mu.Lock()
defer s.p.mu.Unlock()
if err := s.p.delete(ctx); err != nil {
return err
}
return s.transition("deleted")
}
func (s *createdCheckpointState) Kill(ctx context.Context, sig uint32, all bool) error {
s.p.mu.Lock()
defer s.p.mu.Unlock()
return s.p.kill(ctx, sig, all)
}
func (s *createdCheckpointState) SetExited(status int) {
s.p.mu.Lock()
defer s.p.mu.Unlock()
s.p.setExited(status)
if err := s.transition("stopped"); err != nil {
panic(err)
}
}
type runningState struct {
p *initProcess
}
@@ -278,6 +396,7 @@ func (s *pausedState) SetExited(status int) {
if err := s.transition("stopped"); err != nil {
panic(err)
}
}
type stoppedState struct {

4
linux/shim/local.go
View File

@@ -86,3 +86,7 @@ func (c *local) ShimInfo(ctx context.Context, in *google_protobuf.Empty, opts ..
func (c *local) Update(ctx context.Context, in *shimapi.UpdateTaskRequest, opts ...grpc.CallOption) (*google_protobuf.Empty, error) {
return c.s.Update(ctx, in)
}
func (c *local) Wait(ctx context.Context, in *shimapi.WaitRequest, opts ...grpc.CallOption) (*shimapi.WaitResponse, error) {
return c.s.Wait(ctx, in)
}

6
linux/shim/process.go
View File

@@ -38,7 +38,9 @@ type process interface {
// Stdio returns io information for the container
Stdio() stdio
// Status returns the process status
Status(ctx context.Context) (string, error)
Status(context.Context) (string, error)
// Wait blocks until the process has exited
Wait()
}
type processState interface {
@@ -58,7 +60,7 @@ func stateName(v interface{}) string {
switch v.(type) {
case *runningState, *execRunningState:
return "running"
case *createdState, *execCreatedState:
case *createdState, *execCreatedState, *createdCheckpointState:
return "created"
case *pausedState:
return "paused"

85
linux/shim/service.go
View File

@@ -46,7 +46,7 @@ func NewService(config Config, publisher events.Publisher) (*Service, error) {
config: config,
context: context,
processes: make(map[string]process),
events: make(chan interface{}, 4096),
events: make(chan interface{}, 128),
ec: reaper.Default.Subscribe(),
}
go s.processExits()
@@ -111,7 +111,9 @@ func (s *Service) Create(ctx context.Context, r *shimapi.CreateTaskRequest) (*sh
}
func (s *Service) Start(ctx context.Context, r *shimapi.StartRequest) (*shimapi.StartResponse, error) {
p := s.getProcess(r.ID)
s.mu.Lock()
defer s.mu.Unlock()
p := s.processes[r.ID]
if p == nil {
return nil, errdefs.ToGRPCf(errdefs.ErrNotFound, "process %s not found", r.ID)
}
@@ -138,7 +140,9 @@ func (s *Service) Start(ctx context.Context, r *shimapi.StartRequest) (*shimapi.
}
func (s *Service) Delete(ctx context.Context, r *google_protobuf.Empty) (*shimapi.DeleteResponse, error) {
p := s.getProcess(s.id)
s.mu.Lock()
defer s.mu.Unlock()
p := s.processes[s.id]
if p == nil {
return nil, errdefs.ToGRPCf(errdefs.ErrFailedPrecondition, "container must be created")
}
@@ -146,7 +150,7 @@ func (s *Service) Delete(ctx context.Context, r *google_protobuf.Empty) (*shimap
if err := p.Delete(ctx); err != nil {
return nil, err
}
s.deleteProcess(p.ID())
delete(s.processes, s.id)
s.platform.close()
s.events <- &eventsapi.TaskDelete{
ContainerID: s.id,
@@ -162,17 +166,19 @@ func (s *Service) Delete(ctx context.Context, r *google_protobuf.Empty) (*shimap
}
func (s *Service) DeleteProcess(ctx context.Context, r *shimapi.DeleteProcessRequest) (*shimapi.DeleteResponse, error) {
s.mu.Lock()
defer s.mu.Unlock()
if r.ID == s.id {
return nil, grpc.Errorf(codes.InvalidArgument, "cannot delete init process with DeleteProcess")
}
p := s.getProcess(r.ID)
p := s.processes[r.ID]
if p == nil {
return nil, errors.Wrapf(errdefs.ErrNotFound, "process %s", r.ID)
}
if err := p.Delete(ctx); err != nil {
return nil, err
}
s.deleteProcess(r.ID)
delete(s.processes, r.ID)
return &shimapi.DeleteResponse{
ExitStatus: uint32(p.ExitStatus()),
ExitedAt: p.ExitedAt(),
@@ -207,6 +213,8 @@ func (s *Service) Exec(ctx context.Context, r *shimapi.ExecProcessRequest) (*goo
}
func (s *Service) ResizePty(ctx context.Context, r *shimapi.ResizePtyRequest) (*google_protobuf.Empty, error) {
s.mu.Lock()
defer s.mu.Unlock()
if r.ID == "" {
return nil, errdefs.ToGRPCf(errdefs.ErrInvalidArgument, "id not provided")
}
@@ -214,7 +222,7 @@ func (s *Service) ResizePty(ctx context.Context, r *shimapi.ResizePtyRequest) (*
Width: uint16(r.Width),
Height: uint16(r.Height),
}
p := s.getProcess(r.ID)
p := s.processes[r.ID]
if p == nil {
return nil, errors.Errorf("process does not exist %s", r.ID)
}
@@ -225,7 +233,9 @@ func (s *Service) ResizePty(ctx context.Context, r *shimapi.ResizePtyRequest) (*
}
func (s *Service) State(ctx context.Context, r *shimapi.StateRequest) (*shimapi.StateResponse, error) {
p := s.getProcess(r.ID)
s.mu.Lock()
defer s.mu.Unlock()
p := s.processes[r.ID]
if p == nil {
return nil, errdefs.ToGRPCf(errdefs.ErrNotFound, "process id %s not found", r.ID)
}
@@ -262,7 +272,9 @@ func (s *Service) State(ctx context.Context, r *shimapi.StateRequest) (*shimapi.
}
func (s *Service) Pause(ctx context.Context, r *google_protobuf.Empty) (*google_protobuf.Empty, error) {
p := s.getProcess(s.id)
s.mu.Lock()
defer s.mu.Unlock()
p := s.processes[s.id]
if p == nil {
return nil, errdefs.ToGRPCf(errdefs.ErrFailedPrecondition, "container must be created")
}
@@ -276,7 +288,9 @@ func (s *Service) Pause(ctx context.Context, r *google_protobuf.Empty) (*google_
}
func (s *Service) Resume(ctx context.Context, r *google_protobuf.Empty) (*google_protobuf.Empty, error) {
p := s.getProcess(s.id)
s.mu.Lock()
defer s.mu.Unlock()
p := s.processes[s.id]
if p == nil {
return nil, errdefs.ToGRPCf(errdefs.ErrFailedPrecondition, "container must be created")
}
@@ -290,8 +304,10 @@ func (s *Service) Resume(ctx context.Context, r *google_protobuf.Empty) (*google
}
func (s *Service) Kill(ctx context.Context, r *shimapi.KillRequest) (*google_protobuf.Empty, error) {
s.mu.Lock()
defer s.mu.Unlock()
if r.ID == "" {
p := s.getProcess(s.id)
p := s.processes[s.id]
if p == nil {
return nil, errdefs.ToGRPCf(errdefs.ErrFailedPrecondition, "container must be created")
}
@@ -301,7 +317,7 @@ func (s *Service) Kill(ctx context.Context, r *shimapi.KillRequest) (*google_pro
return empty, nil
}
p := s.getProcess(r.ID)
p := s.processes[r.ID]
if p == nil {
return nil, errdefs.ToGRPCf(errdefs.ErrNotFound, "process id %s not found", r.ID)
}
@@ -322,7 +338,9 @@ func (s *Service) ListPids(ctx context.Context, r *shimapi.ListPidsRequest) (*sh
}
func (s *Service) CloseIO(ctx context.Context, r *shimapi.CloseIORequest) (*google_protobuf.Empty, error) {
p := s.getProcess(r.ID)
s.mu.Lock()
defer s.mu.Unlock()
p := s.processes[r.ID]
if p == nil {
return nil, errdefs.ToGRPCf(errdefs.ErrNotFound, "process does not exist %s", r.ID)
}
@@ -335,7 +353,9 @@ func (s *Service) CloseIO(ctx context.Context, r *shimapi.CloseIORequest) (*goog
}
func (s *Service) Checkpoint(ctx context.Context, r *shimapi.CheckpointTaskRequest) (*google_protobuf.Empty, error) {
p := s.getProcess(s.id)
s.mu.Lock()
defer s.mu.Unlock()
p := s.processes[s.id]
if p == nil {
return nil, errdefs.ToGRPCf(errdefs.ErrFailedPrecondition, "container must be created")
}
@@ -355,7 +375,9 @@ func (s *Service) ShimInfo(ctx context.Context, r *google_protobuf.Empty) (*shim
}
func (s *Service) Update(ctx context.Context, r *shimapi.UpdateTaskRequest) (*google_protobuf.Empty, error) {
p := s.getProcess(s.id)
s.mu.Lock()
defer s.mu.Unlock()
p := s.processes[s.id]
if p == nil {
return nil, errdefs.ToGRPCf(errdefs.ErrFailedPrecondition, "container must be created")
}
@@ -365,23 +387,19 @@ func (s *Service) Update(ctx context.Context, r *shimapi.UpdateTaskRequest) (*go
return empty, nil
}
func (s *Service) addProcess(id string, p process) {
func (s *Service) Wait(ctx context.Context, r *shimapi.WaitRequest) (*shimapi.WaitResponse, error) {
s.mu.Lock()
s.processes[id] = p
p := s.processes[r.ID]
s.mu.Unlock()
}
if p == nil {
return nil, errdefs.ToGRPCf(errdefs.ErrFailedPrecondition, "container must be created")
}
p.Wait()
func (s *Service) getProcess(id string) process {
s.mu.Lock()
p := s.processes[id]
s.mu.Unlock()
return p
}
func (s *Service) deleteProcess(id string) {
s.mu.Lock()
delete(s.processes, id)
s.mu.Unlock()
return &shimapi.WaitResponse{
ExitStatus: uint32(p.ExitStatus()),
ExitedAt: p.ExitedAt(),
}, nil
}
func (s *Service) processExits() {
@@ -402,7 +420,6 @@ func (s *Service) checkProcesses(e runc.Exit) {
Error("failed to kill init's children")
}
}
p.SetExited(e.Status)
s.events <- &eventsapi.TaskExit{
ContainerID: s.id,
@@ -417,7 +434,9 @@ func (s *Service) checkProcesses(e runc.Exit) {
}
func (s *Service) getContainerPids(ctx context.Context, id string) ([]uint32, error) {
p := s.getProcess(s.id)
s.mu.Lock()
defer s.mu.Unlock()
p := s.processes[s.id]
if p == nil {
return nil, errors.Wrapf(errdefs.ErrFailedPrecondition, "container must be created")
}
@@ -436,7 +455,7 @@ func (s *Service) getContainerPids(ctx context.Context, id string) ([]uint32, er
func (s *Service) forward(publisher events.Publisher) {
for e := range s.events {
if err := publisher.Publish(s.context, getTopic(s.context, e), e); err != nil {
log.G(s.context).WithError(err).Error("post event")
logrus.WithError(err).Error("post event")
}
}
}
@@ -464,7 +483,7 @@ func getTopic(ctx context.Context, e interface{}) string {
case *eventsapi.TaskCheckpointed:
return runtime.TaskCheckpointedEventTopic
default:
log.G(ctx).Warnf("no topic for type %#v", e)
logrus.Warnf("no topic for type %#v", e)
}
return runtime.TaskUnknownTopic
}

470
linux/shim/v1/shim.pb.go
View File

@@ -27,6 +27,8 @@
UpdateTaskRequest
StartRequest
StartResponse
WaitRequest
WaitResponse
*/
package shim
@@ -242,6 +244,23 @@ func (m *StartResponse) Reset() { *m = StartResponse{} }
func (*StartResponse) ProtoMessage() {}
func (*StartResponse) Descriptor() ([]byte, []int) { return fileDescriptorShim, []int{17} }
type WaitRequest struct {
ID string `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
}
func (m *WaitRequest) Reset() { *m = WaitRequest{} }
func (*WaitRequest) ProtoMessage() {}
func (*WaitRequest) Descriptor() ([]byte, []int) { return fileDescriptorShim, []int{18} }
type WaitResponse struct {
ExitStatus uint32 `protobuf:"varint,1,opt,name=exit_status,json=exitStatus,proto3" json:"exit_status,omitempty"`
ExitedAt time.Time `protobuf:"bytes,2,opt,name=exited_at,json=exitedAt,stdtime" json:"exited_at"`
}
func (m *WaitResponse) Reset() { *m = WaitResponse{} }
func (*WaitResponse) ProtoMessage() {}
func (*WaitResponse) Descriptor() ([]byte, []int) { return fileDescriptorShim, []int{19} }
func init() {
proto.RegisterType((*CreateTaskRequest)(nil), "containerd.runtime.linux.shim.v1.CreateTaskRequest")
proto.RegisterType((*CreateTaskResponse)(nil), "containerd.runtime.linux.shim.v1.CreateTaskResponse")
@@ -261,6 +280,8 @@ func init() {
proto.RegisterType((*UpdateTaskRequest)(nil), "containerd.runtime.linux.shim.v1.UpdateTaskRequest")
proto.RegisterType((*StartRequest)(nil), "containerd.runtime.linux.shim.v1.StartRequest")
proto.RegisterType((*StartResponse)(nil), "containerd.runtime.linux.shim.v1.StartResponse")
proto.RegisterType((*WaitRequest)(nil), "containerd.runtime.linux.shim.v1.WaitRequest")
proto.RegisterType((*WaitResponse)(nil), "containerd.runtime.linux.shim.v1.WaitResponse")
}
// Reference imports to suppress errors if they are not otherwise used.
@@ -291,6 +312,7 @@ type ShimClient interface {
// ShimInfo returns information about the shim.
ShimInfo(ctx context.Context, in *google_protobuf1.Empty, opts ...grpc.CallOption) (*ShimInfoResponse, error)
Update(ctx context.Context, in *UpdateTaskRequest, opts ...grpc.CallOption) (*google_protobuf1.Empty, error)
Wait(ctx context.Context, in *WaitRequest, opts ...grpc.CallOption) (*WaitResponse, error)
}
type shimClient struct {
@@ -436,6 +458,15 @@ func (c *shimClient) Update(ctx context.Context, in *UpdateTaskRequest, opts ...
return out, nil
}
func (c *shimClient) Wait(ctx context.Context, in *WaitRequest, opts ...grpc.CallOption) (*WaitResponse, error) {
out := new(WaitResponse)
err := grpc.Invoke(ctx, "/containerd.runtime.linux.shim.v1.Shim/Wait", in, out, c.cc, opts...)
if err != nil {
return nil, err
}
return out, nil
}
// Server API for Shim service
type ShimServer interface {
@@ -456,6 +487,7 @@ type ShimServer interface {
// ShimInfo returns information about the shim.
ShimInfo(context.Context, *google_protobuf1.Empty) (*ShimInfoResponse, error)
Update(context.Context, *UpdateTaskRequest) (*google_protobuf1.Empty, error)
Wait(context.Context, *WaitRequest) (*WaitResponse, error)
}
func RegisterShimServer(s *grpc.Server, srv ShimServer) {
@@ -732,6 +764,24 @@ func _Shim_Update_Handler(srv interface{}, ctx context.Context, dec func(interfa
return interceptor(ctx, in, info, handler)
}
func _Shim_Wait_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
in := new(WaitRequest)
if err := dec(in); err != nil {
return nil, err
}
if interceptor == nil {
return srv.(ShimServer).Wait(ctx, in)
}
info := &grpc.UnaryServerInfo{
Server: srv,
FullMethod: "/containerd.runtime.linux.shim.v1.Shim/Wait",
}
handler := func(ctx context.Context, req interface{}) (interface{}, error) {
return srv.(ShimServer).Wait(ctx, req.(*WaitRequest))
}
return interceptor(ctx, in, info, handler)
}
var _Shim_serviceDesc = grpc.ServiceDesc{
ServiceName: "containerd.runtime.linux.shim.v1.Shim",
HandlerType: (*ShimServer)(nil),
@@ -796,6 +846,10 @@ var _Shim_serviceDesc = grpc.ServiceDesc{
MethodName: "Update",
Handler: _Shim_Update_Handler,
},
{
MethodName: "Wait",
Handler: _Shim_Wait_Handler,
},
},
Streams: []grpc.StreamDesc{},
Metadata: "github.com/containerd/containerd/linux/shim/v1/shim.proto",
@@ -1471,6 +1525,61 @@ func (m *StartResponse) MarshalTo(dAtA []byte) (int, error) {
return i, nil
}
func (m *WaitRequest) Marshal() (dAtA []byte, err error) {
size := m.Size()
dAtA = make([]byte, size)
n, err := m.MarshalTo(dAtA)
if err != nil {
return nil, err
}
return dAtA[:n], nil
}
func (m *WaitRequest) MarshalTo(dAtA []byte) (int, error) {
var i int
_ = i
var l int
_ = l
if len(m.ID) > 0 {
dAtA[i] = 0xa
i++
i = encodeVarintShim(dAtA, i, uint64(len(m.ID)))
i += copy(dAtA[i:], m.ID)
}
return i, nil
}
func (m *WaitResponse) Marshal() (dAtA []byte, err error) {
size := m.Size()
dAtA = make([]byte, size)
n, err := m.MarshalTo(dAtA)
if err != nil {
return nil, err
}
return dAtA[:n], nil
}
func (m *WaitResponse) MarshalTo(dAtA []byte) (int, error) {
var i int
_ = i
var l int
_ = l
if m.ExitStatus != 0 {
dAtA[i] = 0x8
i++
i = encodeVarintShim(dAtA, i, uint64(m.ExitStatus))
}
dAtA[i] = 0x12
i++
i = encodeVarintShim(dAtA, i, uint64(github_com_gogo_protobuf_types.SizeOfStdTime(m.ExitedAt)))
n9, err := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.ExitedAt, dAtA[i:])
if err != nil {
return 0, err
}
i += n9
return i, nil
}
func encodeFixed64Shim(dAtA []byte, offset int, v uint64) int {
dAtA[offset] = uint8(v)
dAtA[offset+1] = uint8(v >> 8)
@@ -1791,6 +1900,27 @@ func (m *StartResponse) Size() (n int) {
return n
}
func (m *WaitRequest) Size() (n int) {
var l int
_ = l
l = len(m.ID)
if l > 0 {
n += 1 + l + sovShim(uint64(l))
}
return n
}
func (m *WaitResponse) Size() (n int) {
var l int
_ = l
if m.ExitStatus != 0 {
n += 1 + sovShim(uint64(m.ExitStatus))
}
l = github_com_gogo_protobuf_types.SizeOfStdTime(m.ExitedAt)
n += 1 + l + sovShim(uint64(l))
return n
}
func sovShim(x uint64) (n int) {
for {
n++
@@ -2016,6 +2146,27 @@ func (this *StartResponse) String() string {
}, "")
return s
}
func (this *WaitRequest) String() string {
if this == nil {
return "nil"
}
s := strings.Join([]string{`&WaitRequest{`,
`ID:` + fmt.Sprintf("%v", this.ID) + `,`,
`}`,
}, "")
return s
}
func (this *WaitResponse) String() string {
if this == nil {
return "nil"
}
s := strings.Join([]string{`&WaitResponse{`,
`ExitStatus:` + fmt.Sprintf("%v", this.ExitStatus) + `,`,
`ExitedAt:` + strings.Replace(strings.Replace(this.ExitedAt.String(), "Timestamp", "google_protobuf3.Timestamp", 1), `&`, ``, 1) + `,`,
`}`,
}, "")
return s
}
func valueToStringShim(v interface{}) string {
rv := reflect.ValueOf(v)
if rv.IsNil() {
@@ -4272,6 +4423,184 @@ func (m *StartResponse) Unmarshal(dAtA []byte) error {
}
return nil
}
func (m *WaitRequest) Unmarshal(dAtA []byte) error {
l := len(dAtA)
iNdEx := 0
for iNdEx < l {
preIndex := iNdEx
var wire uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowShim
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
wire |= (uint64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
fieldNum := int32(wire >> 3)
wireType := int(wire & 0x7)
if wireType == 4 {
return fmt.Errorf("proto: WaitRequest: wiretype end group for non-group")
}
if fieldNum <= 0 {
return fmt.Errorf("proto: WaitRequest: illegal tag %d (wire type %d)", fieldNum, wire)
}
switch fieldNum {
case 1:
if wireType != 2 {
return fmt.Errorf("proto: wrong wireType = %d for field ID", wireType)
}
var stringLen uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowShim
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
stringLen |= (uint64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
intStringLen := int(stringLen)
if intStringLen < 0 {
return ErrInvalidLengthShim
}
postIndex := iNdEx + intStringLen
if postIndex > l {
return io.ErrUnexpectedEOF
}
m.ID = string(dAtA[iNdEx:postIndex])
iNdEx = postIndex
default:
iNdEx = preIndex
skippy, err := skipShim(dAtA[iNdEx:])
if err != nil {
return err
}
if skippy < 0 {
return ErrInvalidLengthShim
}
if (iNdEx + skippy) > l {
return io.ErrUnexpectedEOF
}
iNdEx += skippy
}
}
if iNdEx > l {
return io.ErrUnexpectedEOF
}
return nil
}
func (m *WaitResponse) Unmarshal(dAtA []byte) error {
l := len(dAtA)
iNdEx := 0
for iNdEx < l {
preIndex := iNdEx
var wire uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowShim
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
wire |= (uint64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
fieldNum := int32(wire >> 3)
wireType := int(wire & 0x7)
if wireType == 4 {
return fmt.Errorf("proto: WaitResponse: wiretype end group for non-group")
}
if fieldNum <= 0 {
return fmt.Errorf("proto: WaitResponse: illegal tag %d (wire type %d)", fieldNum, wire)
}
switch fieldNum {
case 1:
if wireType != 0 {
return fmt.Errorf("proto: wrong wireType = %d for field ExitStatus", wireType)
}
m.ExitStatus = 0
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowShim
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
m.ExitStatus |= (uint32(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
case 2:
if wireType != 2 {
return fmt.Errorf("proto: wrong wireType = %d for field ExitedAt", wireType)
}
var msglen int
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowShim
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
msglen |= (int(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
if msglen < 0 {
return ErrInvalidLengthShim
}
postIndex := iNdEx + msglen
if postIndex > l {
return io.ErrUnexpectedEOF
}
if err := github_com_gogo_protobuf_types.StdTimeUnmarshal(&m.ExitedAt, dAtA[iNdEx:postIndex]); err != nil {
return err
}
iNdEx = postIndex
default:
iNdEx = preIndex
skippy, err := skipShim(dAtA[iNdEx:])
if err != nil {
return err
}
if skippy < 0 {
return ErrInvalidLengthShim
}
if (iNdEx + skippy) > l {
return io.ErrUnexpectedEOF
}
iNdEx += skippy
}
}
if iNdEx > l {
return io.ErrUnexpectedEOF
}
return nil
}
func skipShim(dAtA []byte) (n int, err error) {
l := len(dAtA)
iNdEx := 0
@@ -4382,73 +4711,76 @@ func init() {
}
var fileDescriptorShim = []byte{
// 1083 bytes of a gzipped FileDescriptorProto
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}

11
linux/shim/v1/shim.proto
View File

@@ -47,6 +47,8 @@ service Shim {
rpc ShimInfo(google.protobuf.Empty) returns (ShimInfoResponse);
rpc Update(UpdateTaskRequest) returns (google.protobuf.Empty);
rpc Wait(WaitRequest) returns (WaitResponse);
}
message CreateTaskRequest {
@@ -152,3 +154,12 @@ message StartResponse {
string id = 1;
uint32 pid = 2;
}
message WaitRequest {
string id = 1;
}
message WaitResponse {
uint32 exit_status = 1;
google.protobuf.Timestamp exited_at = 2 [(gogoproto.stdtime) = true, (gogoproto.nullable) = false];
}

42
linux/task.go
View File

@@ -22,12 +22,18 @@ type Task struct {
shim *client.Client
namespace string
cg cgroups.Cgroup
monitor runtime.TaskMonitor
}
func newTask(id, namespace string, pid int, shim *client.Client) (*Task, error) {
cg, err := cgroups.Load(cgroups.V1, cgroups.PidPath(pid))
if err != nil {
return nil, err
func newTask(id, namespace string, pid int, shim *client.Client, monitor runtime.TaskMonitor) (*Task, error) {
var (
err error
cg cgroups.Cgroup
)
if pid > 0 {
if cg, err = cgroups.Load(cgroups.V1, cgroups.PidPath(pid)); err != nil {
return nil, err
}
}
return &Task{
id: id,
@@ -35,6 +41,7 @@ func newTask(id, namespace string, pid int, shim *client.Client) (*Task, error)
shim: shim,
namespace: namespace,
cg: cg,
monitor: monitor,
}, nil
}
@@ -51,12 +58,24 @@ func (t *Task) Info() runtime.TaskInfo {
}
func (t *Task) Start(ctx context.Context) error {
_, err := t.shim.Start(ctx, &shim.StartRequest{
hasCgroup := t.cg != nil
r, err := t.shim.Start(ctx, &shim.StartRequest{
ID: t.id,
})
if err != nil {
return errdefs.FromGRPC(err)
}
t.pid = int(r.Pid)
if !hasCgroup {
cg, err := cgroups.Load(cgroups.V1, cgroups.PidPath(t.pid))
if err != nil {
return err
}
t.cg = cg
if err := t.monitor.Monitor(t); err != nil {
return err
}
}
return nil
}
@@ -225,3 +244,16 @@ func (t *Task) Metrics(ctx context.Context) (interface{}, error) {
func (t *Task) Cgroup() cgroups.Cgroup {
return t.cg
}
func (t *Task) Wait(ctx context.Context) (*runtime.Exit, error) {
r, err := t.shim.Wait(ctx, &shim.WaitRequest{
ID: t.id,
})
if err != nil {
return nil, err
}
return &runtime.Exit{
Timestamp: r.ExitedAt,
Status: r.ExitStatus,
}, nil
}