Delete shim v1

gvisor-containerd-shim is not compatible with containerd 1.1 or earlier.
Starting from containerd 1.2, shim v2 is the preferred interface.

PiperOrigin-RevId: 351485556

1 files changed, 0 insertions, 266 deletions

diff --git a/shim/v1/cli/cli.go b/shim/v1/cli/cli.go
deleted file mode 100644
index cdf60cc2e..000000000
--- a/shim/v1/cli/cli.go
+++ /dev/null
@@ -1,266 +0,0 @@
-// Copyright 2018 The containerd Authors.
-// Copyright 2019 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 cli defines the command line interface for the V1 shim.
-package cli
-
-import (
-	"bytes"
-	"context"
-	"flag"
-	"fmt"
-	"log"
-	"net"
-	"os"
-	"os/exec"
-	"os/signal"
-	"path/filepath"
-	"strings"
-	"sync"
-	"syscall"
-
-	"github.com/containerd/containerd/events"
-	"github.com/containerd/containerd/namespaces"
-	"github.com/containerd/containerd/sys"
-	"github.com/containerd/containerd/sys/reaper"
-	"github.com/containerd/ttrpc"
-	"github.com/containerd/typeurl"
-	"github.com/gogo/protobuf/types"
-	"golang.org/x/sys/unix"
-
-	"gvisor.dev/gvisor/pkg/shim/runsc"
-	"gvisor.dev/gvisor/pkg/shim/v1/shim"
-)
-
-var (
-	debugFlag            bool
-	namespaceFlag        string
-	socketFlag           string
-	addressFlag          string
-	workdirFlag          string
-	runtimeRootFlag      string
-	containerdBinaryFlag string
-	shimConfigFlag       string
-)
-
-// Containerd defaults to runc, unless another runtime is explicitly specified.
-// We keep the same default to make the default behavior consistent.
-const defaultRoot = "/run/containerd/runc"
-
-func init() {
-	flag.BoolVar(&debugFlag, "debug", false, "enable debug output in logs")
-	flag.StringVar(&namespaceFlag, "namespace", "", "namespace that owns the shim")
-	flag.StringVar(&socketFlag, "socket", "", "abstract socket path to serve")
-	flag.StringVar(&addressFlag, "address", "", "grpc address back to main containerd")
-	flag.StringVar(&workdirFlag, "workdir", "", "path used to storge large temporary data")
-	flag.StringVar(&runtimeRootFlag, "runtime-root", defaultRoot, "root directory for the runtime")
-
-	// Currently, the `containerd publish` utility is embedded in the
-	// daemon binary.  The daemon invokes `containerd-shim
-	// -containerd-binary ...` with its own os.Executable() path.
-	flag.StringVar(&containerdBinaryFlag, "containerd-binary", "containerd", "path to containerd binary (used for `containerd publish`)")
-	flag.StringVar(&shimConfigFlag, "config", "/etc/containerd/runsc.toml", "path to the shim configuration file")
-}
-
-// Main is the main entrypoint.
-func Main() {
-	flag.Parse()
-
-	// This is a hack. Exec current process to run standard containerd-shim
-	// if runtime root is not `runsc`. We don't need this for shim v2 api.
-	if filepath.Base(runtimeRootFlag) != "runsc" {
-		if err := executeRuncShim(); err != nil {
-			fmt.Fprintf(os.Stderr, "gvisor-containerd-shim: %s\n", err)
-			os.Exit(1)
-		}
-	}
-
-	// Run regular shim if needed.
-	if err := executeShim(); err != nil {
-		fmt.Fprintf(os.Stderr, "gvisor-containerd-shim: %s\n", err)
-		os.Exit(1)
-	}
-}
-
-// executeRuncShim execs current process to a containerd-shim process and
-// retains all flags and envs.
-func executeRuncShim() error {
-	c, err := loadConfig(shimConfigFlag)
-	if err != nil && !os.IsNotExist(err) {
-		return fmt.Errorf("failed to load shim config: %w", err)
-	}
-	shimPath := c.RuncShim
-	if shimPath == "" {
-		shimPath, err = exec.LookPath("containerd-shim")
-		if err != nil {
-			return fmt.Errorf("lookup containerd-shim failed: %w", err)
-		}
-	}
-
-	args := append([]string{shimPath}, os.Args[1:]...)
-	if err := syscall.Exec(shimPath, args, os.Environ()); err != nil {
-		return fmt.Errorf("exec containerd-shim @ %q failed: %w", shimPath, err)
-	}
-	return nil
-}
-
-func executeShim() error {
-	// start handling signals as soon as possible so that things are
-	// properly reaped or if runtime exits before we hit the handler.
-	signals, err := setupSignals()
-	if err != nil {
-		return err
-	}
-	path, err := os.Getwd()
-	if err != nil {
-		return err
-	}
-	server, err := ttrpc.NewServer(ttrpc.WithServerHandshaker(ttrpc.UnixSocketRequireSameUser()))
-	if err != nil {
-		return fmt.Errorf("failed creating server: %w", err)
-	}
-	c, err := loadConfig(shimConfigFlag)
-	if err != nil && !os.IsNotExist(err) {
-		return fmt.Errorf("failed to load shim config: %w", err)
-	}
-	sv, err := shim.NewService(
-		shim.Config{
-			Path:        path,
-			Namespace:   namespaceFlag,
-			WorkDir:     workdirFlag,
-			RuntimeRoot: runtimeRootFlag,
-			RunscConfig: c.RunscConfig,
-		},
-		&remoteEventsPublisher{address: addressFlag},
-	)
-	if err != nil {
-		return err
-	}
-	registerShimService(server, sv)
-	if err := serve(server, socketFlag); err != nil {
-		return err
-	}
-	return handleSignals(signals, server, sv)
-}
-
-// serve serves the ttrpc API over a unix socket at the provided path this
-// function does not block.
-func serve(server *ttrpc.Server, path string) error {
-	var (
-		l   net.Listener
-		err error
-	)
-	if path == "" {
-		l, err = net.FileListener(os.NewFile(3, "socket"))
-	} else {
-		if len(path) > 106 {
-			return fmt.Errorf("%q: unix socket path too long (> 106)", path)
-		}
-		l, err = net.Listen("unix", "\x00"+path)
-	}
-	if err != nil {
-		return err
-	}
-	go func() {
-		defer l.Close()
-		err := server.Serve(context.Background(), l)
-		if err != nil && !strings.Contains(err.Error(), "use of closed network connection") {
-			log.Fatalf("ttrpc server failure: %v", err)
-		}
-	}()
-	return nil
-}
-
-// setupSignals creates a new signal handler for all signals and sets the shim
-// as a sub-reaper so that the container processes are reparented.
-func setupSignals() (chan os.Signal, error) {
-	signals := make(chan os.Signal, 32)
-	signal.Notify(signals, unix.SIGTERM, unix.SIGINT, unix.SIGCHLD, unix.SIGPIPE)
-	// make sure runc is setup to use the monitor for waiting on processes.
-	// TODO(random-liu): Move shim/reaper.go to a separate package.
-	runsc.Monitor = reaper.Default
-	// Set the shim as the subreaper for all orphaned processes created by
-	// the container.
-	if err := unix.Prctl(unix.PR_SET_CHILD_SUBREAPER, 1, 0, 0, 0); err != nil {
-		return nil, err
-	}
-	return signals, nil
-}
-
-func handleSignals(signals chan os.Signal, server *ttrpc.Server, sv *shim.Service) error {
-	var (
-		termOnce sync.Once
-		done     = make(chan struct{})
-	)
-
-	for {
-		select {
-		case <-done:
-			return nil
-		case s := <-signals:
-			switch s {
-			case unix.SIGCHLD:
-				if _, err := sys.Reap(false); err != nil {
-					log.Printf("reap error: %v", err)
-				}
-			case unix.SIGTERM, unix.SIGINT:
-				go termOnce.Do(func() {
-					ctx := context.TODO()
-					if err := server.Shutdown(ctx); err != nil {
-						log.Printf("failed to shutdown server: %v", err)
-					}
-					// Ensure our child is dead if any.
-					sv.Kill(ctx, &KillRequest{
-						Signal: uint32(syscall.SIGKILL),
-						All:    true,
-					})
-					sv.Delete(context.Background(), &types.Empty{})
-					close(done)
-				})
-			case unix.SIGPIPE:
-			}
-		}
-	}
-}
-
-type remoteEventsPublisher struct {
-	address string
-}
-
-func (l *remoteEventsPublisher) Publish(ctx context.Context, topic string, event events.Event) error {
-	ns, _ := namespaces.Namespace(ctx)
-	encoded, err := typeurl.MarshalAny(event)
-	if err != nil {
-		return err
-	}
-	data, err := encoded.Marshal()
-	if err != nil {
-		return err
-	}
-	cmd := exec.CommandContext(ctx, containerdBinaryFlag, "--address", l.address, "publish", "--topic", topic, "--namespace", ns)
-	cmd.Stdin = bytes.NewReader(data)
-	c, err := reaper.Default.Start(cmd)
-	if err != nil {
-		return err
-	}
-	status, err := reaper.Default.Wait(cmd, c)
-	if err != nil {
-		return fmt.Errorf("failed to publish event: %w", err)
-	}
-	if status != 0 {
-		return fmt.Errorf("failed to publish event: status %d", status)
-	}
-	return nil
-}