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/*
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 v2
import (
"bytes"
"context"
"io"
"os"
gruntime "runtime"
"strings"
"github.com/containerd/containerd/events/exchange"
"github.com/containerd/containerd/log"
"github.com/containerd/containerd/namespaces"
"github.com/containerd/containerd/runtime"
client "github.com/containerd/containerd/runtime/v2/shim"
"github.com/containerd/containerd/runtime/v2/task"
"github.com/containerd/ttrpc"
"github.com/gogo/protobuf/types"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
func shimBinary(ctx context.Context, bundle *Bundle, runtime, containerdAddress string, containerdTTRPCAddress string, events *exchange.Exchange, rt *runtime.TaskList) *binary {
return &binary{
bundle: bundle,
runtime: runtime,
containerdAddress: containerdAddress,
containerdTTRPCAddress: containerdTTRPCAddress,
events: events,
rtTasks: rt,
}
}
type binary struct {
runtime string
containerdAddress string
containerdTTRPCAddress string
bundle *Bundle
events *exchange.Exchange
rtTasks *runtime.TaskList
}
func (b *binary) Start(ctx context.Context, opts *types.Any, onClose func()) (_ *shim, err error) {
args := []string{"-id", b.bundle.ID}
if logrus.GetLevel() == logrus.DebugLevel {
args = append(args, "-debug")
}
args = append(args, "start")
cmd, err := client.Command(
ctx,
b.runtime,
b.containerdAddress,
b.containerdTTRPCAddress,
b.bundle.Path,
opts,
args...,
)
if err != nil {
return nil, err
}
// Windows needs a namespace when openShimLog
ns, _ := namespaces.Namespace(ctx)
shimCtx, cancelShimLog := context.WithCancel(namespaces.WithNamespace(context.Background(), ns))
defer func() {
if err != nil {
cancelShimLog()
}
}()
f, err := openShimLog(shimCtx, b.bundle, client.AnonDialer)
if err != nil {
return nil, errors.Wrap(err, "open shim log pipe")
}
defer func() {
if err != nil {
f.Close()
}
}()
// open the log pipe and block until the writer is ready
// this helps with synchronization of the shim
// copy the shim's logs to containerd's output
go func() {
defer f.Close()
_, err := io.Copy(os.Stderr, f)
err = checkCopyShimLogError(ctx, err)
if err != nil {
log.G(ctx).WithError(err).Error("copy shim log")
}
}()
out, err := cmd.CombinedOutput()
if err != nil {
return nil, errors.Wrapf(err, "%s", out)
}
address := strings.TrimSpace(string(out))
conn, err := client.Connect(address, client.AnonDialer)
if err != nil {
return nil, err
}
onCloseWithShimLog := func() {
onClose()
cancelShimLog()
f.Close()
}
client := ttrpc.NewClient(conn, ttrpc.WithOnClose(onCloseWithShimLog))
return &shim{
bundle: b.bundle,
client: client,
task: task.NewTaskClient(client),
events: b.events,
rtTasks: b.rtTasks,
}, nil
}
func (b *binary) Delete(ctx context.Context) (*runtime.Exit, error) {
log.G(ctx).Info("cleaning up dead shim")
// Windows cannot delete the current working directory while an
// executable is in use with it. For the cleanup case we invoke with the
// default work dir and forward the bundle path on the cmdline.
var bundlePath string
if gruntime.GOOS != "windows" {
bundlePath = b.bundle.Path
}
cmd, err := client.Command(ctx,
b.runtime,
b.containerdAddress,
b.containerdTTRPCAddress,
bundlePath,
nil,
"-id", b.bundle.ID,
"-bundle", b.bundle.Path,
"delete")
if err != nil {
return nil, err
}
var (
out = bytes.NewBuffer(nil)
errb = bytes.NewBuffer(nil)
)
cmd.Stdout = out
cmd.Stderr = errb
if err := cmd.Run(); err != nil {
return nil, errors.Wrapf(err, "%s", errb.String())
}
s := errb.String()
if s != "" {
log.G(ctx).Warnf("cleanup warnings %s", s)
}
var response task.DeleteResponse
if err := response.Unmarshal(out.Bytes()); err != nil {
return nil, err
}
if err := b.bundle.Delete(); err != nil {
return nil, err
}
return &runtime.Exit{
Status: response.ExitStatus,
Timestamp: response.ExitedAt,
Pid: response.Pid,
}, nil
}
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