428 lines
11 KiB
Go
428 lines
11 KiB
Go
// +build !windows
|
|
|
|
package shim
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
"sync"
|
|
"time"
|
|
|
|
"google.golang.org/grpc"
|
|
"google.golang.org/grpc/codes"
|
|
|
|
"github.com/containerd/console"
|
|
events "github.com/containerd/containerd/api/services/events/v1"
|
|
"github.com/containerd/containerd/api/types/task"
|
|
"github.com/containerd/containerd/errdefs"
|
|
evt "github.com/containerd/containerd/events"
|
|
shimapi "github.com/containerd/containerd/linux/shim/v1"
|
|
"github.com/containerd/containerd/log"
|
|
"github.com/containerd/containerd/namespaces"
|
|
"github.com/containerd/containerd/reaper"
|
|
"github.com/containerd/containerd/runtime"
|
|
"github.com/containerd/containerd/typeurl"
|
|
google_protobuf "github.com/golang/protobuf/ptypes/empty"
|
|
"github.com/pkg/errors"
|
|
"golang.org/x/net/context"
|
|
)
|
|
|
|
const (
|
|
ErrContainerNotCreated = "container hasn't been created yet"
|
|
)
|
|
|
|
var empty = &google_protobuf.Empty{}
|
|
|
|
const RuncRoot = "/run/containerd/runc"
|
|
|
|
// NewService returns a new shim service that can be used via GRPC
|
|
func NewService(path, namespace, address string) (*Service, error) {
|
|
if namespace == "" {
|
|
return nil, fmt.Errorf("shim namespace cannot be empty")
|
|
}
|
|
context := namespaces.WithNamespace(context.Background(), namespace)
|
|
var client poster
|
|
if address != "" {
|
|
conn, err := connect(address, dialer)
|
|
if err != nil {
|
|
return nil, errors.Wrapf(err, "failed to dial %q", address)
|
|
}
|
|
client = events.NewEventsClient(conn)
|
|
} else {
|
|
client = &localEventsClient{
|
|
emitter: evt.GetPoster(context),
|
|
}
|
|
}
|
|
s := &Service{
|
|
path: path,
|
|
processes: make(map[string]process),
|
|
events: make(chan interface{}, 4096),
|
|
namespace: namespace,
|
|
context: context,
|
|
}
|
|
go s.forward(client)
|
|
return s, nil
|
|
}
|
|
|
|
type Service struct {
|
|
initProcess *initProcess
|
|
path string
|
|
id string
|
|
bundle string
|
|
mu sync.Mutex
|
|
processes map[string]process
|
|
events chan interface{}
|
|
eventsMu sync.Mutex
|
|
deferredEvent interface{}
|
|
namespace string
|
|
context context.Context
|
|
}
|
|
|
|
func (s *Service) Create(ctx context.Context, r *shimapi.CreateTaskRequest) (*shimapi.CreateTaskResponse, error) {
|
|
process, err := newInitProcess(ctx, s.path, s.namespace, r)
|
|
if err != nil {
|
|
return nil, errdefs.ToGRPC(err)
|
|
}
|
|
s.mu.Lock()
|
|
// save the main task id and bundle to the shim for additional requests
|
|
s.id = r.ID
|
|
s.bundle = r.Bundle
|
|
s.initProcess = process
|
|
pid := process.Pid()
|
|
s.processes[r.ID] = process
|
|
s.mu.Unlock()
|
|
cmd := &reaper.Cmd{
|
|
ExitCh: make(chan int, 1),
|
|
}
|
|
reaper.Default.Register(pid, cmd)
|
|
s.events <- &events.TaskCreate{
|
|
ContainerID: r.ID,
|
|
Bundle: r.Bundle,
|
|
Rootfs: r.Rootfs,
|
|
IO: &events.TaskIO{
|
|
Stdin: r.Stdin,
|
|
Stdout: r.Stdout,
|
|
Stderr: r.Stderr,
|
|
Terminal: r.Terminal,
|
|
},
|
|
Checkpoint: r.Checkpoint,
|
|
Pid: uint32(pid),
|
|
}
|
|
go s.waitExit(process, pid, cmd)
|
|
return &shimapi.CreateTaskResponse{
|
|
Pid: uint32(pid),
|
|
}, nil
|
|
}
|
|
|
|
func (s *Service) Start(ctx context.Context, r *google_protobuf.Empty) (*google_protobuf.Empty, error) {
|
|
if s.initProcess == nil {
|
|
return nil, errors.New(ErrContainerNotCreated)
|
|
}
|
|
if err := s.initProcess.Start(ctx); err != nil {
|
|
return nil, err
|
|
}
|
|
s.events <- &events.TaskStart{
|
|
ContainerID: s.id,
|
|
Pid: uint32(s.initProcess.Pid()),
|
|
}
|
|
return empty, nil
|
|
}
|
|
|
|
func (s *Service) Delete(ctx context.Context, r *google_protobuf.Empty) (*shimapi.DeleteResponse, error) {
|
|
if s.initProcess == nil {
|
|
return nil, errors.New(ErrContainerNotCreated)
|
|
}
|
|
p := s.initProcess
|
|
// TODO (@crosbymichael): how to handle errors here
|
|
p.Delete(ctx)
|
|
s.mu.Lock()
|
|
delete(s.processes, p.ID())
|
|
s.mu.Unlock()
|
|
s.events <- &events.TaskDelete{
|
|
ContainerID: s.id,
|
|
ExitStatus: uint32(p.Status()),
|
|
ExitedAt: p.ExitedAt(),
|
|
Pid: uint32(p.Pid()),
|
|
}
|
|
return &shimapi.DeleteResponse{
|
|
ExitStatus: uint32(p.Status()),
|
|
ExitedAt: p.ExitedAt(),
|
|
Pid: uint32(p.Pid()),
|
|
}, nil
|
|
}
|
|
|
|
func (s *Service) DeleteProcess(ctx context.Context, r *shimapi.DeleteProcessRequest) (*shimapi.DeleteResponse, error) {
|
|
if s.initProcess == nil {
|
|
return nil, errors.New(ErrContainerNotCreated)
|
|
}
|
|
if r.ID == s.initProcess.id {
|
|
return nil, grpc.Errorf(codes.InvalidArgument, "cannot delete init process with DeleteProcess")
|
|
}
|
|
s.mu.Lock()
|
|
p, ok := s.processes[r.ID]
|
|
s.mu.Unlock()
|
|
if !ok {
|
|
return nil, fmt.Errorf("process %s not found", r.ID)
|
|
}
|
|
// TODO (@crosbymichael): how to handle errors here
|
|
p.Delete(ctx)
|
|
s.mu.Lock()
|
|
delete(s.processes, p.ID())
|
|
s.mu.Unlock()
|
|
return &shimapi.DeleteResponse{
|
|
ExitStatus: uint32(p.Status()),
|
|
ExitedAt: p.ExitedAt(),
|
|
Pid: uint32(p.Pid()),
|
|
}, nil
|
|
}
|
|
|
|
func (s *Service) Exec(ctx context.Context, r *shimapi.ExecProcessRequest) (*shimapi.ExecProcessResponse, error) {
|
|
if s.initProcess == nil {
|
|
return nil, errors.New(ErrContainerNotCreated)
|
|
}
|
|
s.mu.Lock()
|
|
defer s.mu.Unlock()
|
|
|
|
process, err := newExecProcess(ctx, s.path, r, s.initProcess, r.ID)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
pid := process.Pid()
|
|
cmd := &reaper.Cmd{
|
|
ExitCh: make(chan int, 1),
|
|
}
|
|
reaper.Default.Register(pid, cmd)
|
|
s.processes[r.ID] = process
|
|
|
|
s.events <- &events.TaskExecAdded{
|
|
ContainerID: s.id,
|
|
ExecID: r.ID,
|
|
Pid: uint32(pid),
|
|
}
|
|
go s.waitExit(process, pid, cmd)
|
|
return &shimapi.ExecProcessResponse{
|
|
Pid: uint32(pid),
|
|
}, nil
|
|
}
|
|
|
|
func (s *Service) ResizePty(ctx context.Context, r *shimapi.ResizePtyRequest) (*google_protobuf.Empty, error) {
|
|
if r.ID == "" {
|
|
return nil, grpc.Errorf(codes.InvalidArgument, "id not provided")
|
|
}
|
|
ws := console.WinSize{
|
|
Width: uint16(r.Width),
|
|
Height: uint16(r.Height),
|
|
}
|
|
s.mu.Lock()
|
|
p, ok := s.processes[r.ID]
|
|
s.mu.Unlock()
|
|
if !ok {
|
|
return nil, errors.Errorf("process does not exist %s", r.ID)
|
|
}
|
|
if err := p.Resize(ws); err != nil {
|
|
return nil, err
|
|
}
|
|
return empty, nil
|
|
}
|
|
|
|
func (s *Service) State(ctx context.Context, r *shimapi.StateRequest) (*shimapi.StateResponse, error) {
|
|
if s.initProcess == nil {
|
|
return nil, errors.New(ErrContainerNotCreated)
|
|
}
|
|
p, ok := s.processes[r.ID]
|
|
if !ok {
|
|
return nil, grpc.Errorf(codes.NotFound, "process id %s not found", r.ID)
|
|
}
|
|
st, err := s.initProcess.ContainerStatus(ctx)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
status := task.StatusUnknown
|
|
switch st {
|
|
case "created":
|
|
status = task.StatusCreated
|
|
case "running":
|
|
status = task.StatusRunning
|
|
case "stopped":
|
|
status = task.StatusStopped
|
|
case "paused":
|
|
status = task.StatusPaused
|
|
}
|
|
sio := p.Stdio()
|
|
return &shimapi.StateResponse{
|
|
ID: p.ID(),
|
|
Bundle: s.bundle,
|
|
Pid: uint32(p.Pid()),
|
|
Status: status,
|
|
Stdin: sio.stdin,
|
|
Stdout: sio.stdout,
|
|
Stderr: sio.stderr,
|
|
Terminal: sio.terminal,
|
|
}, nil
|
|
}
|
|
|
|
func (s *Service) Pause(ctx context.Context, r *google_protobuf.Empty) (*google_protobuf.Empty, error) {
|
|
if s.initProcess == nil {
|
|
return nil, errors.New(ErrContainerNotCreated)
|
|
}
|
|
if err := s.initProcess.Pause(ctx); err != nil {
|
|
return nil, err
|
|
}
|
|
s.events <- &events.TaskPaused{
|
|
ContainerID: s.id,
|
|
}
|
|
return empty, nil
|
|
}
|
|
|
|
func (s *Service) Resume(ctx context.Context, r *google_protobuf.Empty) (*google_protobuf.Empty, error) {
|
|
if s.initProcess == nil {
|
|
return nil, errors.New(ErrContainerNotCreated)
|
|
}
|
|
if err := s.initProcess.Resume(ctx); err != nil {
|
|
return nil, err
|
|
}
|
|
s.events <- &events.TaskResumed{
|
|
ContainerID: s.id,
|
|
}
|
|
return empty, nil
|
|
}
|
|
|
|
func (s *Service) Kill(ctx context.Context, r *shimapi.KillRequest) (*google_protobuf.Empty, error) {
|
|
if s.initProcess == nil {
|
|
return nil, errors.New(ErrContainerNotCreated)
|
|
}
|
|
if r.ID == "" {
|
|
if err := s.initProcess.Kill(ctx, r.Signal, r.All); err != nil {
|
|
return nil, err
|
|
}
|
|
return empty, nil
|
|
}
|
|
p, ok := s.processes[r.ID]
|
|
if !ok {
|
|
return nil, grpc.Errorf(codes.NotFound, "process id %s not found", r.ID)
|
|
}
|
|
if err := p.Kill(ctx, r.Signal, r.All); err != nil {
|
|
return nil, err
|
|
}
|
|
return empty, nil
|
|
}
|
|
|
|
func (s *Service) ListPids(ctx context.Context, r *shimapi.ListPidsRequest) (*shimapi.ListPidsResponse, error) {
|
|
pids, err := s.getContainerPids(ctx, r.ID)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return &shimapi.ListPidsResponse{
|
|
Pids: pids,
|
|
}, nil
|
|
}
|
|
|
|
func (s *Service) CloseIO(ctx context.Context, r *shimapi.CloseIORequest) (*google_protobuf.Empty, error) {
|
|
p, ok := s.processes[r.ID]
|
|
if !ok {
|
|
return nil, grpc.Errorf(codes.NotFound, "process does not exist %s", r.ID)
|
|
}
|
|
if err := p.Stdin().Close(); err != nil {
|
|
return nil, err
|
|
}
|
|
return empty, nil
|
|
}
|
|
|
|
func (s *Service) Checkpoint(ctx context.Context, r *shimapi.CheckpointTaskRequest) (*google_protobuf.Empty, error) {
|
|
if s.initProcess == nil {
|
|
return nil, errors.New(ErrContainerNotCreated)
|
|
}
|
|
if err := s.initProcess.Checkpoint(ctx, r); err != nil {
|
|
return nil, err
|
|
}
|
|
s.events <- &events.TaskCheckpointed{
|
|
ContainerID: s.id,
|
|
}
|
|
return empty, nil
|
|
}
|
|
|
|
func (s *Service) ShimInfo(ctx context.Context, r *google_protobuf.Empty) (*shimapi.ShimInfoResponse, error) {
|
|
return &shimapi.ShimInfoResponse{
|
|
ShimPid: uint32(os.Getpid()),
|
|
}, nil
|
|
}
|
|
|
|
func (s *Service) Update(ctx context.Context, r *shimapi.UpdateTaskRequest) (*google_protobuf.Empty, error) {
|
|
if s.initProcess == nil {
|
|
return nil, errors.New(ErrContainerNotCreated)
|
|
}
|
|
if err := s.initProcess.Update(ctx, r); err != nil {
|
|
return nil, err
|
|
}
|
|
return empty, nil
|
|
}
|
|
|
|
func (s *Service) waitExit(p process, pid int, cmd *reaper.Cmd) {
|
|
status := <-cmd.ExitCh
|
|
p.Exited(status)
|
|
|
|
reaper.Default.Delete(pid)
|
|
s.events <- &events.TaskExit{
|
|
ContainerID: s.id,
|
|
ID: p.ID(),
|
|
Pid: uint32(pid),
|
|
ExitStatus: uint32(status),
|
|
ExitedAt: p.ExitedAt(),
|
|
}
|
|
}
|
|
|
|
func (s *Service) getContainerPids(ctx context.Context, id string) ([]uint32, error) {
|
|
p, err := s.initProcess.runtime.Ps(ctx, id)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
pids := make([]uint32, 0, len(p))
|
|
for _, pid := range p {
|
|
pids = append(pids, uint32(pid))
|
|
}
|
|
return pids, nil
|
|
}
|
|
|
|
func (s *Service) forward(client poster) {
|
|
for e := range s.events {
|
|
a, err := typeurl.MarshalAny(e)
|
|
if err != nil {
|
|
log.G(s.context).WithError(err).Error("marshal event")
|
|
continue
|
|
}
|
|
if _, err := client.Post(s.context, &events.PostEventRequest{
|
|
Envelope: &events.Envelope{
|
|
Timestamp: time.Now(),
|
|
Topic: "/task/" + getTopic(e),
|
|
Event: a,
|
|
},
|
|
}); err != nil {
|
|
log.G(s.context).WithError(err).Error("post event")
|
|
}
|
|
}
|
|
}
|
|
|
|
func getTopic(e interface{}) string {
|
|
switch e.(type) {
|
|
case *events.TaskCreate:
|
|
return runtime.TaskCreateEventTopic
|
|
case *events.TaskStart:
|
|
return runtime.TaskStartEventTopic
|
|
case *events.TaskOOM:
|
|
return runtime.TaskOOMEventTopic
|
|
case *events.TaskExit:
|
|
return runtime.TaskExitEventTopic
|
|
case *events.TaskDelete:
|
|
return runtime.TaskDeleteEventTopic
|
|
case *events.TaskExecAdded:
|
|
return runtime.TaskExecAddedEventTopic
|
|
case *events.TaskPaused:
|
|
return runtime.TaskPausedEventTopic
|
|
case *events.TaskResumed:
|
|
return runtime.TaskResumedEventTopic
|
|
case *events.TaskCheckpointed:
|
|
return runtime.TaskCheckpointedEventTopic
|
|
}
|
|
return "?"
|
|
}
|