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-rw-r--r--pkg/shim/service.go953
1 files changed, 953 insertions, 0 deletions
diff --git a/pkg/shim/service.go b/pkg/shim/service.go
new file mode 100644
index 000000000..9aba26ac7
--- /dev/null
+++ b/pkg/shim/service.go
@@ -0,0 +1,953 @@
+// Copyright 2018 The gVisor 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
+//
+// https://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 shim implements Containerd Shim v2 interface.
+package shim
+
+import (
+ "context"
+ "fmt"
+ "io"
+ "os"
+ "os/exec"
+ "path/filepath"
+ "sync"
+ "syscall"
+ "time"
+
+ "github.com/BurntSushi/toml"
+ "github.com/containerd/cgroups"
+ cgroupsstats "github.com/containerd/cgroups/stats/v1"
+ "github.com/containerd/console"
+ "github.com/containerd/containerd/api/events"
+ "github.com/containerd/containerd/api/types/task"
+ "github.com/containerd/containerd/errdefs"
+ "github.com/containerd/containerd/log"
+ "github.com/containerd/containerd/mount"
+ "github.com/containerd/containerd/namespaces"
+ "github.com/containerd/containerd/pkg/process"
+ "github.com/containerd/containerd/pkg/stdio"
+ "github.com/containerd/containerd/runtime"
+ "github.com/containerd/containerd/runtime/linux/runctypes"
+ "github.com/containerd/containerd/runtime/v2/shim"
+ taskAPI "github.com/containerd/containerd/runtime/v2/task"
+ "github.com/containerd/containerd/sys/reaper"
+ "github.com/containerd/typeurl"
+ "github.com/gogo/protobuf/types"
+ "github.com/sirupsen/logrus"
+ "golang.org/x/sys/unix"
+ "gvisor.dev/gvisor/pkg/cleanup"
+
+ "gvisor.dev/gvisor/pkg/shim/proc"
+ "gvisor.dev/gvisor/pkg/shim/runsc"
+ "gvisor.dev/gvisor/pkg/shim/runtimeoptions"
+ "gvisor.dev/gvisor/pkg/shim/utils"
+ "gvisor.dev/gvisor/runsc/specutils"
+)
+
+var (
+ empty = &types.Empty{}
+ bufPool = sync.Pool{
+ New: func() interface{} {
+ buffer := make([]byte, 32<<10)
+ return &buffer
+ },
+ }
+)
+
+var _ = (taskAPI.TaskService)(&service{})
+
+const (
+ // configFile is the default config file name. For containerd 1.2,
+ // we assume that a config.toml should exist in the runtime root.
+ configFile = "config.toml"
+
+ // shimAddressPath is the relative path to a file that contains the address
+ // to the shim UDS. See service.shimAddress.
+ shimAddressPath = "address"
+)
+
+// New returns a new shim service that can be used via GRPC.
+func New(ctx context.Context, id string, publisher shim.Publisher, cancel func()) (shim.Shim, error) {
+ log.L.Debugf("service.New, id: %s", id)
+
+ var opts shim.Opts
+ if ctxOpts := ctx.Value(shim.OptsKey{}); ctxOpts != nil {
+ opts = ctxOpts.(shim.Opts)
+ }
+
+ ep, err := newOOMEpoller(publisher)
+ if err != nil {
+ return nil, err
+ }
+ go ep.run(ctx)
+ s := &service{
+ id: id,
+ processes: make(map[string]process.Process),
+ events: make(chan interface{}, 128),
+ ec: proc.ExitCh,
+ oomPoller: ep,
+ cancel: cancel,
+ genericOptions: opts,
+ }
+ go s.processExits(ctx)
+ runsc.Monitor = &runsc.LogMonitor{Next: reaper.Default}
+ if err := s.initPlatform(); err != nil {
+ cancel()
+ return nil, fmt.Errorf("failed to initialized platform behavior: %w", err)
+ }
+ go s.forward(ctx, publisher)
+
+ if address, err := shim.ReadAddress(shimAddressPath); err == nil {
+ s.shimAddress = address
+ }
+
+ return s, nil
+}
+
+// service is the shim implementation of a remote shim over GRPC. It runs in 2
+// different modes:
+// 1. Service: process runs for the life time of the container and receives
+// calls described in shimapi.TaskService interface.
+// 2. Tool: process is short lived and runs only to perform the requested
+// operations and then exits. It implements the direct functions in
+// shim.Shim interface.
+//
+// When the service is running, it saves a json file with state information so
+// that commands sent to the tool can load the state and perform the operation.
+type service struct {
+ mu sync.Mutex
+
+ // id is the container ID.
+ id string
+
+ // bundle is a path provided by the caller on container creation. Store
+ // because it's needed in commands that don't receive bundle in the request.
+ bundle string
+
+ // task is the main process that is running the container.
+ task *proc.Init
+
+ // processes maps ExecId to processes running through exec.
+ processes map[string]process.Process
+
+ events chan interface{}
+
+ // platform handles operations related to the console.
+ platform stdio.Platform
+
+ // genericOptions are options that come from the shim interface and are common
+ // to all shims.
+ genericOptions shim.Opts
+
+ // opts are configuration options specific for this shim.
+ opts options
+
+ // ex gets notified whenever the container init process or an exec'd process
+ // exits from inside the sandbox.
+ ec chan proc.Exit
+
+ // oomPoller monitors the sandbox's cgroup for OOM notifications.
+ oomPoller *epoller
+
+ // cancel is a function that needs to be called before the shim stops. The
+ // function is provided by the caller to New().
+ cancel func()
+
+ // shimAddress is the location of the UDS used to communicate to containerd.
+ shimAddress string
+}
+
+func (s *service) newCommand(ctx context.Context, containerdBinary, containerdAddress string) (*exec.Cmd, error) {
+ ns, err := namespaces.NamespaceRequired(ctx)
+ if err != nil {
+ return nil, err
+ }
+ self, err := os.Executable()
+ if err != nil {
+ return nil, err
+ }
+ cwd, err := os.Getwd()
+ if err != nil {
+ return nil, err
+ }
+ args := []string{
+ "-namespace", ns,
+ "-address", containerdAddress,
+ "-publish-binary", containerdBinary,
+ }
+ if s.genericOptions.Debug {
+ args = append(args, "-debug")
+ }
+ cmd := exec.Command(self, args...)
+ cmd.Dir = cwd
+ cmd.Env = append(os.Environ(), "GOMAXPROCS=2")
+ cmd.SysProcAttr = &syscall.SysProcAttr{
+ Setpgid: true,
+ }
+ return cmd, nil
+}
+
+func (s *service) StartShim(ctx context.Context, id, containerdBinary, containerdAddress, containerdTTRPCAddress string) (string, error) {
+ log.L.Debugf("StartShim, id: %s, binary: %q, address: %q", id, containerdBinary, containerdAddress)
+
+ cmd, err := s.newCommand(ctx, containerdBinary, containerdAddress)
+ if err != nil {
+ return "", err
+ }
+ address, err := shim.SocketAddress(ctx, containerdAddress, id)
+ if err != nil {
+ return "", err
+ }
+ socket, err := shim.NewSocket(address)
+ if err != nil {
+ // The only time where this would happen is if there is a bug and the socket
+ // was not cleaned up in the cleanup method of the shim or we are using the
+ // grouping functionality where the new process should be run with the same
+ // shim as an existing container.
+ if !shim.SocketEaddrinuse(err) {
+ return "", fmt.Errorf("create new shim socket: %w", err)
+ }
+ if shim.CanConnect(address) {
+ if err := shim.WriteAddress(shimAddressPath, address); err != nil {
+ return "", fmt.Errorf("write existing socket for shim: %w", err)
+ }
+ return address, nil
+ }
+ if err := shim.RemoveSocket(address); err != nil {
+ return "", fmt.Errorf("remove pre-existing socket: %w", err)
+ }
+ if socket, err = shim.NewSocket(address); err != nil {
+ return "", fmt.Errorf("try create new shim socket 2x: %w", err)
+ }
+ }
+ cu := cleanup.Make(func() {
+ socket.Close()
+ _ = shim.RemoveSocket(address)
+ })
+ defer cu.Clean()
+
+ f, err := socket.File()
+ if err != nil {
+ return "", err
+ }
+
+ cmd.ExtraFiles = append(cmd.ExtraFiles, f)
+
+ log.L.Debugf("Executing: %q %s", cmd.Path, cmd.Args)
+ if err := cmd.Start(); err != nil {
+ f.Close()
+ return "", err
+ }
+ cu.Add(func() { cmd.Process.Kill() })
+
+ // make sure to wait after start
+ go cmd.Wait()
+ if err := shim.WritePidFile("shim.pid", cmd.Process.Pid); err != nil {
+ return "", err
+ }
+ if err := shim.WriteAddress(shimAddressPath, address); err != nil {
+ return "", err
+ }
+ if err := shim.SetScore(cmd.Process.Pid); err != nil {
+ return "", fmt.Errorf("failed to set OOM Score on shim: %w", err)
+ }
+ cu.Release()
+ return address, nil
+}
+
+// Cleanup is called from another process (need to reload state) to stop the
+// container and undo all operations done in Create().
+func (s *service) Cleanup(ctx context.Context) (*taskAPI.DeleteResponse, error) {
+ log.L.Debugf("Cleanup")
+
+ path, err := os.Getwd()
+ if err != nil {
+ return nil, err
+ }
+ ns, err := namespaces.NamespaceRequired(ctx)
+ if err != nil {
+ return nil, err
+ }
+ var st state
+ if err := st.load(path); err != nil {
+ return nil, err
+ }
+ r := proc.NewRunsc(s.opts.Root, path, ns, st.Options.BinaryName, nil)
+
+ if err := r.Delete(ctx, s.id, &runsc.DeleteOpts{
+ Force: true,
+ }); err != nil {
+ log.L.Infof("failed to remove runc container: %v", err)
+ }
+ if err := mount.UnmountAll(st.Rootfs, 0); err != nil {
+ log.L.Infof("failed to cleanup rootfs mount: %v", err)
+ }
+ return &taskAPI.DeleteResponse{
+ ExitedAt: time.Now(),
+ ExitStatus: 128 + uint32(unix.SIGKILL),
+ }, nil
+}
+
+// Create creates a new initial process and container with the underlying OCI
+// runtime.
+func (s *service) Create(ctx context.Context, r *taskAPI.CreateTaskRequest) (*taskAPI.CreateTaskResponse, error) {
+ log.L.Debugf("Create, id: %s, bundle: %q", r.ID, r.Bundle)
+
+ s.mu.Lock()
+ defer s.mu.Unlock()
+
+ // Save the main task id and bundle to the shim for additional requests.
+ s.id = r.ID
+ s.bundle = r.Bundle
+
+ ns, err := namespaces.NamespaceRequired(ctx)
+ if err != nil {
+ return nil, fmt.Errorf("create namespace: %w", err)
+ }
+
+ // Read from root for now.
+ if r.Options != nil {
+ v, err := typeurl.UnmarshalAny(r.Options)
+ if err != nil {
+ return nil, err
+ }
+ var path string
+ switch o := v.(type) {
+ case *runctypes.CreateOptions: // containerd 1.2.x
+ s.opts.IoUID = o.IoUid
+ s.opts.IoGID = o.IoGid
+ s.opts.ShimCgroup = o.ShimCgroup
+ case *runctypes.RuncOptions: // containerd 1.2.x
+ root := proc.RunscRoot
+ if o.RuntimeRoot != "" {
+ root = o.RuntimeRoot
+ }
+
+ s.opts.BinaryName = o.Runtime
+
+ path = filepath.Join(root, configFile)
+ if _, err := os.Stat(path); err != nil {
+ if !os.IsNotExist(err) {
+ return nil, fmt.Errorf("stat config file %q: %w", path, err)
+ }
+ // A config file in runtime root is not required.
+ path = ""
+ }
+ case *runtimeoptions.Options: // containerd 1.3.x+
+ if o.ConfigPath == "" {
+ break
+ }
+ if o.TypeUrl != optionsType {
+ return nil, fmt.Errorf("unsupported option type %q", o.TypeUrl)
+ }
+ path = o.ConfigPath
+ default:
+ return nil, fmt.Errorf("unsupported option type %q", r.Options.TypeUrl)
+ }
+ if path != "" {
+ if _, err = toml.DecodeFile(path, &s.opts); err != nil {
+ return nil, fmt.Errorf("decode config file %q: %w", path, err)
+ }
+ }
+ }
+
+ if len(s.opts.LogLevel) != 0 {
+ lvl, err := logrus.ParseLevel(s.opts.LogLevel)
+ if err != nil {
+ return nil, err
+ }
+ logrus.SetLevel(lvl)
+ }
+ if len(s.opts.LogPath) != 0 {
+ logPath := runsc.FormatShimLogPath(s.opts.LogPath, s.id)
+ if err := os.MkdirAll(filepath.Dir(logPath), 0777); err != nil {
+ return nil, fmt.Errorf("failed to create log dir: %w", err)
+ }
+ logFile, err := os.Create(logPath)
+ if err != nil {
+ return nil, fmt.Errorf("failed to create log file: %w", err)
+ }
+ log.L.Debugf("Starting mirror log at %q", logPath)
+ std := logrus.StandardLogger()
+ std.SetOutput(io.MultiWriter(std.Out, logFile))
+
+ log.L.Debugf("Create shim")
+ log.L.Debugf("***************************")
+ log.L.Debugf("Args: %s", os.Args)
+ log.L.Debugf("PID: %d", os.Getpid())
+ log.L.Debugf("ID: %s", s.id)
+ log.L.Debugf("Options: %+v", s.opts)
+ log.L.Debugf("Bundle: %s", r.Bundle)
+ log.L.Debugf("Terminal: %t", r.Terminal)
+ log.L.Debugf("stdin: %s", r.Stdin)
+ log.L.Debugf("stdout: %s", r.Stdout)
+ log.L.Debugf("stderr: %s", r.Stderr)
+ log.L.Debugf("***************************")
+ }
+
+ // Save state before any action is taken to ensure Cleanup() will have all
+ // the information it needs to undo the operations.
+ st := state{
+ Rootfs: filepath.Join(r.Bundle, "rootfs"),
+ Options: s.opts,
+ }
+ if err := st.save(r.Bundle); err != nil {
+ return nil, err
+ }
+
+ if err := os.Mkdir(st.Rootfs, 0711); err != nil && !os.IsExist(err) {
+ return nil, err
+ }
+
+ // Convert from types.Mount to proc.Mount.
+ var mounts []proc.Mount
+ for _, m := range r.Rootfs {
+ mounts = append(mounts, proc.Mount{
+ Type: m.Type,
+ Source: m.Source,
+ Target: m.Target,
+ Options: m.Options,
+ })
+ }
+
+ // Cleans up all mounts in case of failure.
+ cu := cleanup.Make(func() {
+ if err := mount.UnmountAll(st.Rootfs, 0); err != nil {
+ log.L.Infof("failed to cleanup rootfs mount: %v", err)
+ }
+ })
+ defer cu.Clean()
+ for _, rm := range mounts {
+ m := &mount.Mount{
+ Type: rm.Type,
+ Source: rm.Source,
+ Options: rm.Options,
+ }
+ if err := m.Mount(st.Rootfs); err != nil {
+ return nil, fmt.Errorf("failed to mount rootfs component %v: %w", m, err)
+ }
+ }
+
+ config := &proc.CreateConfig{
+ ID: r.ID,
+ Bundle: r.Bundle,
+ Runtime: s.opts.BinaryName,
+ Rootfs: mounts,
+ Terminal: r.Terminal,
+ Stdin: r.Stdin,
+ Stdout: r.Stdout,
+ Stderr: r.Stderr,
+ }
+ process, err := newInit(r.Bundle, filepath.Join(r.Bundle, "work"), ns, s.platform, config, &s.opts, st.Rootfs)
+ if err != nil {
+ return nil, errdefs.ToGRPC(err)
+ }
+ if err := process.Create(ctx, config); err != nil {
+ return nil, errdefs.ToGRPC(err)
+ }
+
+ // Set up OOM notification on the sandbox's cgroup. This is done on
+ // sandbox create since the sandbox process will be created here.
+ pid := process.Pid()
+ if pid > 0 {
+ cg, err := cgroups.Load(cgroups.V1, cgroups.PidPath(pid))
+ if err != nil {
+ return nil, fmt.Errorf("loading cgroup for %d: %w", pid, err)
+ }
+ if err := s.oomPoller.add(s.id, cg); err != nil {
+ return nil, fmt.Errorf("add cg to OOM monitor: %w", err)
+ }
+ }
+
+ // Success
+ cu.Release()
+ s.task = process
+ return &taskAPI.CreateTaskResponse{
+ Pid: uint32(process.Pid()),
+ }, nil
+}
+
+// Start starts a process.
+func (s *service) Start(ctx context.Context, r *taskAPI.StartRequest) (*taskAPI.StartResponse, error) {
+ log.L.Debugf("Start, id: %s, execID: %s", r.ID, r.ExecID)
+
+ p, err := s.getProcess(r.ExecID)
+ if err != nil {
+ return nil, err
+ }
+ if err := p.Start(ctx); err != nil {
+ return nil, err
+ }
+ // TODO: Set the cgroup and oom notifications on restore.
+ // https://github.com/google/gvisor-containerd-shim/issues/58
+ return &taskAPI.StartResponse{
+ Pid: uint32(p.Pid()),
+ }, nil
+}
+
+// Delete deletes the initial process and container.
+func (s *service) Delete(ctx context.Context, r *taskAPI.DeleteRequest) (*taskAPI.DeleteResponse, error) {
+ log.L.Debugf("Delete, id: %s, execID: %s", r.ID, r.ExecID)
+
+ p, err := s.getProcess(r.ExecID)
+ if err != nil {
+ return nil, err
+ }
+ if p == nil {
+ return nil, errdefs.ToGRPCf(errdefs.ErrFailedPrecondition, "container must be created")
+ }
+ if err := p.Delete(ctx); err != nil {
+ return nil, err
+ }
+ if len(r.ExecID) != 0 {
+ s.mu.Lock()
+ delete(s.processes, r.ExecID)
+ s.mu.Unlock()
+ } else if s.platform != nil {
+ s.platform.Close()
+ }
+ return &taskAPI.DeleteResponse{
+ ExitStatus: uint32(p.ExitStatus()),
+ ExitedAt: p.ExitedAt(),
+ Pid: uint32(p.Pid()),
+ }, nil
+}
+
+// Exec spawns an additional process inside the container.
+func (s *service) Exec(ctx context.Context, r *taskAPI.ExecProcessRequest) (*types.Empty, error) {
+ log.L.Debugf("Exec, id: %s, execID: %s", r.ID, r.ExecID)
+
+ s.mu.Lock()
+ p := s.processes[r.ExecID]
+ s.mu.Unlock()
+ if p != nil {
+ return nil, errdefs.ToGRPCf(errdefs.ErrAlreadyExists, "id %s", r.ExecID)
+ }
+ if s.task == nil {
+ return nil, errdefs.ToGRPCf(errdefs.ErrFailedPrecondition, "container must be created")
+ }
+ process, err := s.task.Exec(ctx, s.bundle, &proc.ExecConfig{
+ ID: r.ExecID,
+ Terminal: r.Terminal,
+ Stdin: r.Stdin,
+ Stdout: r.Stdout,
+ Stderr: r.Stderr,
+ Spec: r.Spec,
+ })
+ if err != nil {
+ return nil, errdefs.ToGRPC(err)
+ }
+ s.mu.Lock()
+ s.processes[r.ExecID] = process
+ s.mu.Unlock()
+ return empty, nil
+}
+
+// ResizePty resizes the terminal of a process.
+func (s *service) ResizePty(ctx context.Context, r *taskAPI.ResizePtyRequest) (*types.Empty, error) {
+ log.L.Debugf("ResizePty, id: %s, execID: %s, dimension: %dx%d", r.ID, r.ExecID, r.Height, r.Width)
+
+ p, err := s.getProcess(r.ExecID)
+ if err != nil {
+ return nil, err
+ }
+ ws := console.WinSize{
+ Width: uint16(r.Width),
+ Height: uint16(r.Height),
+ }
+ if err := p.Resize(ws); err != nil {
+ return nil, errdefs.ToGRPC(err)
+ }
+ return empty, nil
+}
+
+// State returns runtime state information for a process.
+func (s *service) State(ctx context.Context, r *taskAPI.StateRequest) (*taskAPI.StateResponse, error) {
+ log.L.Debugf("State, id: %s, execID: %s", r.ID, r.ExecID)
+
+ p, err := s.getProcess(r.ExecID)
+ if err != nil {
+ return nil, err
+ }
+ st, err := p.Status(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
+ }
+ sio := p.Stdio()
+ return &taskAPI.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,
+ ExitStatus: uint32(p.ExitStatus()),
+ ExitedAt: p.ExitedAt(),
+ }, nil
+}
+
+// Pause the container.
+func (s *service) Pause(ctx context.Context, r *taskAPI.PauseRequest) (*types.Empty, error) {
+ log.L.Debugf("Pause, id: %s", r.ID)
+ return empty, errdefs.ToGRPC(errdefs.ErrNotImplemented)
+}
+
+// Resume the container.
+func (s *service) Resume(ctx context.Context, r *taskAPI.ResumeRequest) (*types.Empty, error) {
+ log.L.Debugf("Resume, id: %s", r.ID)
+ return empty, errdefs.ToGRPC(errdefs.ErrNotImplemented)
+}
+
+// Kill a process with the provided signal.
+func (s *service) Kill(ctx context.Context, r *taskAPI.KillRequest) (*types.Empty, error) {
+ log.L.Debugf("Kill, id: %s, execID: %s, signal: %d, all: %t", r.ID, r.ExecID, r.Signal, r.All)
+
+ p, err := s.getProcess(r.ExecID)
+ if err != nil {
+ return nil, err
+ }
+ if p == nil {
+ return nil, errdefs.ToGRPCf(errdefs.ErrFailedPrecondition, "container must be created")
+ }
+ if err := p.Kill(ctx, r.Signal, r.All); err != nil {
+ return nil, errdefs.ToGRPC(err)
+ }
+ return empty, nil
+}
+
+// Pids returns all pids inside the container.
+func (s *service) Pids(ctx context.Context, r *taskAPI.PidsRequest) (*taskAPI.PidsResponse, error) {
+ log.L.Debugf("Pids, id: %s", r.ID)
+
+ pids, err := s.getContainerPids(ctx, r.ID)
+ if err != nil {
+ return nil, errdefs.ToGRPC(err)
+ }
+ var processes []*task.ProcessInfo
+ for _, pid := range pids {
+ pInfo := task.ProcessInfo{
+ Pid: pid,
+ }
+ for _, p := range s.processes {
+ if p.Pid() == int(pid) {
+ d := &runctypes.ProcessDetails{
+ ExecID: p.ID(),
+ }
+ a, err := typeurl.MarshalAny(d)
+ if err != nil {
+ return nil, fmt.Errorf("failed to marshal process %d info: %w", pid, err)
+ }
+ pInfo.Info = a
+ break
+ }
+ }
+ processes = append(processes, &pInfo)
+ }
+ return &taskAPI.PidsResponse{
+ Processes: processes,
+ }, nil
+}
+
+// CloseIO closes the I/O context of a process.
+func (s *service) CloseIO(ctx context.Context, r *taskAPI.CloseIORequest) (*types.Empty, error) {
+ log.L.Debugf("CloseIO, id: %s, execID: %s, stdin: %t", r.ID, r.ExecID, r.Stdin)
+
+ p, err := s.getProcess(r.ExecID)
+ if err != nil {
+ return nil, err
+ }
+ if stdin := p.Stdin(); stdin != nil {
+ if err := stdin.Close(); err != nil {
+ return nil, fmt.Errorf("close stdin: %w", err)
+ }
+ }
+ return empty, nil
+}
+
+// Checkpoint checkpoints the container.
+func (s *service) Checkpoint(ctx context.Context, r *taskAPI.CheckpointTaskRequest) (*types.Empty, error) {
+ log.L.Debugf("Checkpoint, id: %s", r.ID)
+ return empty, errdefs.ToGRPC(errdefs.ErrNotImplemented)
+}
+
+// Connect returns shim information such as the shim's pid.
+func (s *service) Connect(ctx context.Context, r *taskAPI.ConnectRequest) (*taskAPI.ConnectResponse, error) {
+ log.L.Debugf("Connect, id: %s", r.ID)
+
+ var pid int
+ if s.task != nil {
+ pid = s.task.Pid()
+ }
+ return &taskAPI.ConnectResponse{
+ ShimPid: uint32(os.Getpid()),
+ TaskPid: uint32(pid),
+ }, nil
+}
+
+func (s *service) Shutdown(ctx context.Context, r *taskAPI.ShutdownRequest) (*types.Empty, error) {
+ log.L.Debugf("Shutdown, id: %s", r.ID)
+ s.cancel()
+ if s.shimAddress != "" {
+ _ = shim.RemoveSocket(s.shimAddress)
+ }
+ os.Exit(0)
+ panic("Should not get here")
+}
+
+func (s *service) Stats(ctx context.Context, r *taskAPI.StatsRequest) (*taskAPI.StatsResponse, error) {
+ log.L.Debugf("Stats, id: %s", r.ID)
+ if s.task == nil {
+ log.L.Debugf("Stats error, id: %s: container not created", r.ID)
+ return nil, errdefs.ToGRPCf(errdefs.ErrFailedPrecondition, "container must be created")
+ }
+ stats, err := s.task.Runtime().Stats(ctx, s.id)
+ if err != nil {
+ log.L.Debugf("Stats error, id: %s: %v", r.ID, err)
+ return nil, err
+ }
+
+ // gvisor currently (as of 2020-03-03) only returns the total memory
+ // usage and current PID value[0]. However, we copy the common fields here
+ // so that future updates will propagate correct information. We're
+ // using the cgroups.Metrics structure so we're returning the same type
+ // as runc.
+ //
+ // [0]: https://github.com/google/gvisor/blob/277a0d5a1fbe8272d4729c01ee4c6e374d047ebc/runsc/boot/events.go#L61-L81
+ metrics := &cgroupsstats.Metrics{
+ CPU: &cgroupsstats.CPUStat{
+ Usage: &cgroupsstats.CPUUsage{
+ Total: stats.Cpu.Usage.Total,
+ Kernel: stats.Cpu.Usage.Kernel,
+ User: stats.Cpu.Usage.User,
+ PerCPU: stats.Cpu.Usage.Percpu,
+ },
+ Throttling: &cgroupsstats.Throttle{
+ Periods: stats.Cpu.Throttling.Periods,
+ ThrottledPeriods: stats.Cpu.Throttling.ThrottledPeriods,
+ ThrottledTime: stats.Cpu.Throttling.ThrottledTime,
+ },
+ },
+ Memory: &cgroupsstats.MemoryStat{
+ Cache: stats.Memory.Cache,
+ Usage: &cgroupsstats.MemoryEntry{
+ Limit: stats.Memory.Usage.Limit,
+ Usage: stats.Memory.Usage.Usage,
+ Max: stats.Memory.Usage.Max,
+ Failcnt: stats.Memory.Usage.Failcnt,
+ },
+ Swap: &cgroupsstats.MemoryEntry{
+ Limit: stats.Memory.Swap.Limit,
+ Usage: stats.Memory.Swap.Usage,
+ Max: stats.Memory.Swap.Max,
+ Failcnt: stats.Memory.Swap.Failcnt,
+ },
+ Kernel: &cgroupsstats.MemoryEntry{
+ Limit: stats.Memory.Kernel.Limit,
+ Usage: stats.Memory.Kernel.Usage,
+ Max: stats.Memory.Kernel.Max,
+ Failcnt: stats.Memory.Kernel.Failcnt,
+ },
+ KernelTCP: &cgroupsstats.MemoryEntry{
+ Limit: stats.Memory.KernelTCP.Limit,
+ Usage: stats.Memory.KernelTCP.Usage,
+ Max: stats.Memory.KernelTCP.Max,
+ Failcnt: stats.Memory.KernelTCP.Failcnt,
+ },
+ },
+ Pids: &cgroupsstats.PidsStat{
+ Current: stats.Pids.Current,
+ Limit: stats.Pids.Limit,
+ },
+ }
+ data, err := typeurl.MarshalAny(metrics)
+ if err != nil {
+ log.L.Debugf("Stats error, id: %s: %v", r.ID, err)
+ return nil, err
+ }
+ log.L.Debugf("Stats success, id: %s: %+v", r.ID, data)
+ return &taskAPI.StatsResponse{
+ Stats: data,
+ }, nil
+}
+
+// Update updates a running container.
+func (s *service) Update(ctx context.Context, r *taskAPI.UpdateTaskRequest) (*types.Empty, error) {
+ return empty, errdefs.ToGRPC(errdefs.ErrNotImplemented)
+}
+
+// Wait waits for a process to exit.
+func (s *service) Wait(ctx context.Context, r *taskAPI.WaitRequest) (*taskAPI.WaitResponse, error) {
+ log.L.Debugf("Wait, id: %s, execID: %s", r.ID, r.ExecID)
+
+ p, err := s.getProcess(r.ExecID)
+ if err != nil {
+ return nil, err
+ }
+ if p == nil {
+ return nil, errdefs.ToGRPCf(errdefs.ErrFailedPrecondition, "container must be created")
+ }
+ p.Wait()
+
+ return &taskAPI.WaitResponse{
+ ExitStatus: uint32(p.ExitStatus()),
+ ExitedAt: p.ExitedAt(),
+ }, nil
+}
+
+func (s *service) processExits(ctx context.Context) {
+ for e := range s.ec {
+ s.checkProcesses(ctx, e)
+ }
+}
+
+func (s *service) checkProcesses(ctx context.Context, e proc.Exit) {
+ // TODO(random-liu): Add `shouldKillAll` logic if container pid
+ // namespace is supported.
+ for _, p := range s.allProcesses() {
+ if p.ID() == e.ID {
+ if ip, ok := p.(*proc.Init); ok {
+ // Ensure all children are killed.
+ log.L.Debugf("Container init process exited, killing all container processes")
+ if err := ip.KillAll(ctx); err != nil {
+ log.G(ctx).WithError(err).WithField("id", ip.ID()).
+ Error("failed to kill init's children")
+ }
+ }
+ p.SetExited(e.Status)
+ s.events <- &events.TaskExit{
+ ContainerID: s.id,
+ ID: p.ID(),
+ Pid: uint32(p.Pid()),
+ ExitStatus: uint32(e.Status),
+ ExitedAt: p.ExitedAt(),
+ }
+ return
+ }
+ }
+}
+
+func (s *service) allProcesses() (o []process.Process) {
+ s.mu.Lock()
+ defer s.mu.Unlock()
+ for _, p := range s.processes {
+ o = append(o, p)
+ }
+ if s.task != nil {
+ o = append(o, s.task)
+ }
+ return o
+}
+
+func (s *service) getContainerPids(ctx context.Context, id string) ([]uint32, error) {
+ s.mu.Lock()
+ p := s.task
+ s.mu.Unlock()
+ if p == nil {
+ return nil, fmt.Errorf("container must be created: %w", errdefs.ErrFailedPrecondition)
+ }
+ ps, err := p.Runtime().Ps(ctx, id)
+ if err != nil {
+ return nil, err
+ }
+ pids := make([]uint32, 0, len(ps))
+ for _, pid := range ps {
+ pids = append(pids, uint32(pid))
+ }
+ return pids, nil
+}
+
+func (s *service) forward(ctx context.Context, publisher shim.Publisher) {
+ for e := range s.events {
+ err := publisher.Publish(ctx, getTopic(e), e)
+ if err != nil {
+ // Should not happen.
+ panic(fmt.Errorf("post event: %w", err))
+ }
+ }
+}
+
+func (s *service) getProcess(execID string) (process.Process, error) {
+ s.mu.Lock()
+ defer s.mu.Unlock()
+ if execID == "" {
+ return s.task, nil
+ }
+ p := s.processes[execID]
+ if p == nil {
+ return nil, errdefs.ToGRPCf(errdefs.ErrNotFound, "process does not exist %s", execID)
+ }
+ return p, nil
+}
+
+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.TaskExecStarted:
+ return runtime.TaskExecStartedEventTopic
+ default:
+ log.L.Infof("no topic for type %#v", e)
+ }
+ return runtime.TaskUnknownTopic
+}
+
+func newInit(path, workDir, namespace string, platform stdio.Platform, r *proc.CreateConfig, options *options, rootfs string) (*proc.Init, error) {
+ spec, err := utils.ReadSpec(r.Bundle)
+ if err != nil {
+ return nil, fmt.Errorf("read oci spec: %w", err)
+ }
+ if err := utils.UpdateVolumeAnnotations(r.Bundle, spec); err != nil {
+ return nil, fmt.Errorf("update volume annotations: %w", err)
+ }
+ runsc.FormatRunscLogPath(r.ID, options.RunscConfig)
+ runtime := proc.NewRunsc(options.Root, path, namespace, options.BinaryName, options.RunscConfig)
+ p := proc.New(r.ID, runtime, stdio.Stdio{
+ Stdin: r.Stdin,
+ Stdout: r.Stdout,
+ Stderr: r.Stderr,
+ Terminal: r.Terminal,
+ })
+ p.Bundle = r.Bundle
+ p.Platform = platform
+ p.Rootfs = rootfs
+ p.WorkDir = workDir
+ p.IoUID = int(options.IoUID)
+ p.IoGID = int(options.IoGID)
+ p.Sandbox = specutils.SpecContainerType(spec) == specutils.ContainerTypeSandbox
+ p.UserLog = utils.UserLogPath(spec)
+ p.Monitor = reaper.Default
+ return p, nil
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-05 13:40:45 +0000