Runtime v2

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
2018-07-09 13:27:52 -04:00
parent 6de11ab973
commit da1b5470cd
78 changed files with 9836 additions and 652 deletions
--- a/runtime/v1/linux/proc/init_state.go
+++ b/runtime/v1/linux/proc/init_state.go
@@ -0,0 +1,545 @@
+// +build !windows
+
+/*
+   Copyright The containerd Authors.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+package proc
+
+import (
+	"context"
+	"sync"
+	"syscall"
+
+	"github.com/containerd/console"
+	"github.com/containerd/containerd/errdefs"
+	"github.com/containerd/containerd/runtime/proc"
+	"github.com/containerd/fifo"
+	runc "github.com/containerd/go-runc"
+	google_protobuf "github.com/gogo/protobuf/types"
+	"github.com/pkg/errors"
+)
+
+type initState interface {
+	proc.State
+
+	Pause(context.Context) error
+	Resume(context.Context) error
+	Update(context.Context, *google_protobuf.Any) error
+	Checkpoint(context.Context, *CheckpointConfig) error
+	Exec(context.Context, string, *ExecConfig) (proc.Process, error)
+}
+
+type createdState struct {
+	p *Init
+}
+
+func (s *createdState) 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 *createdState) 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 *createdState) 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 *createdState) Update(context context.Context, r *google_protobuf.Any) error {
+	s.p.mu.Lock()
+	defer s.p.mu.Unlock()
+
+	return s.p.update(context, r)
+}
+
+func (s *createdState) Checkpoint(context context.Context, r *CheckpointConfig) error {
+	s.p.mu.Lock()
+	defer s.p.mu.Unlock()
+
+	return errors.Errorf("cannot checkpoint a task in created state")
+}
+
+func (s *createdState) Resize(ws console.WinSize) error {
+	s.p.mu.Lock()
+	defer s.p.mu.Unlock()
+
+	return s.p.resize(ws)
+}
+
+func (s *createdState) Start(ctx context.Context) error {
+	s.p.mu.Lock()
+	defer s.p.mu.Unlock()
+	if err := s.p.start(ctx); err != nil {
+		return err
+	}
+	return s.transition("running")
+}
+
+func (s *createdState) 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 *createdState) 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 *createdState) 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)
+	}
+}
+
+func (s *createdState) Exec(ctx context.Context, path string, r *ExecConfig) (proc.Process, error) {
+	s.p.mu.Lock()
+	defer s.p.mu.Unlock()
+	return s.p.exec(ctx, path, r)
+}
+
+type createdCheckpointState struct {
+	p    *Init
+	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 *google_protobuf.Any) error {
+	s.p.mu.Lock()
+	defer s.p.mu.Unlock()
+
+	return s.p.update(context, r)
+}
+
+func (s *createdCheckpointState) Checkpoint(context context.Context, r *CheckpointConfig) 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
+	sio := p.stdio
+
+	var (
+		err    error
+		socket *runc.Socket
+	)
+	if sio.Terminal {
+		if socket, err = runc.NewTempConsoleSocket(); err != nil {
+			return errors.Wrap(err, "failed to create OCI runtime console socket")
+		}
+		defer socket.Close()
+		s.opts.ConsoleSocket = socket
+	}
+
+	if _, err := s.p.runtime.Restore(ctx, p.id, p.Bundle, s.opts); err != nil {
+		return p.runtimeError(err, "OCI runtime restore failed")
+	}
+	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 socket != nil {
+		console, err := socket.ReceiveMaster()
+		if err != nil {
+			return errors.Wrap(err, "failed to retrieve console master")
+		}
+		console, err = p.Platform.CopyConsole(ctx, console, sio.Stdin, sio.Stdout, sio.Stderr, &p.wg, &copyWaitGroup)
+		if err != nil {
+			return errors.Wrap(err, "failed to start console copy")
+		}
+		p.console = console
+	} else 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)
+	}
+}
+
+func (s *createdCheckpointState) Exec(ctx context.Context, path string, r *ExecConfig) (proc.Process, error) {
+	s.p.mu.Lock()
+	defer s.p.mu.Unlock()
+
+	return nil, errors.Errorf("cannot exec in a created state")
+}
+
+type runningState struct {
+	p *Init
+}
+
+func (s *runningState) transition(name string) error {
+	switch name {
+	case "stopped":
+		s.p.initState = &stoppedState{p: s.p}
+	case "paused":
+		s.p.initState = &pausedState{p: s.p}
+	default:
+		return errors.Errorf("invalid state transition %q to %q", stateName(s), name)
+	}
+	return nil
+}
+
+func (s *runningState) Pause(ctx context.Context) error {
+	s.p.mu.Lock()
+	defer s.p.mu.Unlock()
+	if err := s.p.pause(ctx); err != nil {
+		return err
+	}
+	return s.transition("paused")
+}
+
+func (s *runningState) Resume(ctx context.Context) error {
+	s.p.mu.Lock()
+	defer s.p.mu.Unlock()
+
+	return errors.Errorf("cannot resume a running process")
+}
+
+func (s *runningState) Update(context context.Context, r *google_protobuf.Any) error {
+	s.p.mu.Lock()
+	defer s.p.mu.Unlock()
+
+	return s.p.update(context, r)
+}
+
+func (s *runningState) Checkpoint(ctx context.Context, r *CheckpointConfig) error {
+	s.p.mu.Lock()
+	defer s.p.mu.Unlock()
+
+	return s.p.checkpoint(ctx, r)
+}
+
+func (s *runningState) Resize(ws console.WinSize) error {
+	s.p.mu.Lock()
+	defer s.p.mu.Unlock()
+
+	return s.p.resize(ws)
+}
+
+func (s *runningState) Start(ctx context.Context) error {
+	s.p.mu.Lock()
+	defer s.p.mu.Unlock()
+
+	return errors.Errorf("cannot start a running process")
+}
+
+func (s *runningState) Delete(ctx context.Context) error {
+	s.p.mu.Lock()
+	defer s.p.mu.Unlock()
+
+	return errors.Errorf("cannot delete a running process")
+}
+
+func (s *runningState) 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 *runningState) 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)
+	}
+}
+
+func (s *runningState) Exec(ctx context.Context, path string, r *ExecConfig) (proc.Process, error) {
+	s.p.mu.Lock()
+	defer s.p.mu.Unlock()
+	return s.p.exec(ctx, path, r)
+}
+
+type pausedState struct {
+	p *Init
+}
+
+func (s *pausedState) transition(name string) error {
+	switch name {
+	case "running":
+		s.p.initState = &runningState{p: s.p}
+	case "stopped":
+		s.p.initState = &stoppedState{p: s.p}
+	default:
+		return errors.Errorf("invalid state transition %q to %q", stateName(s), name)
+	}
+	return nil
+}
+
+func (s *pausedState) Pause(ctx context.Context) error {
+	s.p.mu.Lock()
+	defer s.p.mu.Unlock()
+
+	return errors.Errorf("cannot pause a paused container")
+}
+
+func (s *pausedState) Resume(ctx context.Context) error {
+	s.p.mu.Lock()
+	defer s.p.mu.Unlock()
+
+	if err := s.p.resume(ctx); err != nil {
+		return err
+	}
+	return s.transition("running")
+}
+
+func (s *pausedState) Update(context context.Context, r *google_protobuf.Any) error {
+	s.p.mu.Lock()
+	defer s.p.mu.Unlock()
+
+	return s.p.update(context, r)
+}
+
+func (s *pausedState) Checkpoint(ctx context.Context, r *CheckpointConfig) error {
+	s.p.mu.Lock()
+	defer s.p.mu.Unlock()
+
+	return s.p.checkpoint(ctx, r)
+}
+
+func (s *pausedState) Resize(ws console.WinSize) error {
+	s.p.mu.Lock()
+	defer s.p.mu.Unlock()
+
+	return s.p.resize(ws)
+}
+
+func (s *pausedState) Start(ctx context.Context) error {
+	s.p.mu.Lock()
+	defer s.p.mu.Unlock()
+
+	return errors.Errorf("cannot start a paused process")
+}
+
+func (s *pausedState) Delete(ctx context.Context) error {
+	s.p.mu.Lock()
+	defer s.p.mu.Unlock()
+
+	return errors.Errorf("cannot delete a paused process")
+}
+
+func (s *pausedState) 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 *pausedState) 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)
+	}
+}
+
+func (s *pausedState) Exec(ctx context.Context, path string, r *ExecConfig) (proc.Process, error) {
+	s.p.mu.Lock()
+	defer s.p.mu.Unlock()
+
+	return nil, errors.Errorf("cannot exec in a paused state")
+}
+
+type stoppedState struct {
+	p *Init
+}
+
+func (s *stoppedState) transition(name string) error {
+	switch name {
+	case "deleted":
+		s.p.initState = &deletedState{}
+	default:
+		return errors.Errorf("invalid state transition %q to %q", stateName(s), name)
+	}
+	return nil
+}
+
+func (s *stoppedState) Pause(ctx context.Context) error {
+	s.p.mu.Lock()
+	defer s.p.mu.Unlock()
+
+	return errors.Errorf("cannot pause a stopped container")
+}
+
+func (s *stoppedState) Resume(ctx context.Context) error {
+	s.p.mu.Lock()
+	defer s.p.mu.Unlock()
+
+	return errors.Errorf("cannot resume a stopped container")
+}
+
+func (s *stoppedState) Update(context context.Context, r *google_protobuf.Any) error {
+	s.p.mu.Lock()
+	defer s.p.mu.Unlock()
+
+	return errors.Errorf("cannot update a stopped container")
+}
+
+func (s *stoppedState) Checkpoint(ctx context.Context, r *CheckpointConfig) error {
+	s.p.mu.Lock()
+	defer s.p.mu.Unlock()
+
+	return errors.Errorf("cannot checkpoint a stopped container")
+}
+
+func (s *stoppedState) Resize(ws console.WinSize) error {
+	s.p.mu.Lock()
+	defer s.p.mu.Unlock()
+
+	return errors.Errorf("cannot resize a stopped container")
+}
+
+func (s *stoppedState) Start(ctx context.Context) error {
+	s.p.mu.Lock()
+	defer s.p.mu.Unlock()
+
+	return errors.Errorf("cannot start a stopped process")
+}
+
+func (s *stoppedState) 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 *stoppedState) Kill(ctx context.Context, sig uint32, all bool) error {
+	return errdefs.ToGRPCf(errdefs.ErrNotFound, "process %s not found", s.p.id)
+}
+
+func (s *stoppedState) SetExited(status int) {
+	// no op
+}
+
+func (s *stoppedState) Exec(ctx context.Context, path string, r *ExecConfig) (proc.Process, error) {
+	s.p.mu.Lock()
+	defer s.p.mu.Unlock()
+
+	return nil, errors.Errorf("cannot exec in a stopped state")
+}