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runtime-v1: kill shim in cleanupAfterDeadShim

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1. kill shim in cleanupAfterDeadShim avoid shim leak
2. refactor cleanupAfterDeadShim, get pid from bundle
path instead of make pid as a parameter

Signed-off-by: Ace-Tang <aceapril@126.com>
This commit is contained in:
Ace-Tang 2019-04-18 15:12:09 +08:00
parent 835e6d01fb
commit dfa51c9279
2 changed files with 25 additions and 16 deletions
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31
runtime/v1/linux/runtime.go
View File

@ -191,18 +191,13 @@ func (r *Runtime) Create(ctx context.Context, id string, opts runtime.CreateOpts
}
exitHandler := func() {
log.G(ctx).WithField("id", id).Info("shim reaped")
t, err := r.tasks.Get(ctx, id)
if err != nil {
if _, err := r.tasks.Get(ctx, id); err != nil {
// Task was never started or was already successfully deleted
return
}
lc := t.(*Task)
log.G(ctx).WithFields(logrus.Fields{
"id": id,
"namespace": namespace,
}).Warn("cleaning up after killed shim")
if err = r.cleanupAfterDeadShim(context.Background(), bundle, namespace, id, lc.pid); err != nil {
if err = r.cleanupAfterDeadShim(context.Background(), bundle, namespace, id); err != nil {
log.G(ctx).WithError(err).WithFields(logrus.Fields{
"id": id,
"namespace": namespace,
@ -338,12 +333,12 @@ func (r *Runtime) loadTasks(ctx context.Context, ns string) ([]*Task, error) {
ctx = namespaces.WithNamespace(ctx, ns)
pid, _ := runc.ReadPidFile(filepath.Join(bundle.path, proc.InitPidFile))
s, err := bundle.NewShimClient(ctx, ns, ShimConnect(r.config, func() {
_, err := r.tasks.Get(ctx, id)
if err != nil {
if _, err := r.tasks.Get(ctx, id); err != nil {
// Task was never started or was already successfully deleted
return
}
if err := r.cleanupAfterDeadShim(ctx, bundle, ns, id, pid); err != nil {
if err := r.cleanupAfterDeadShim(ctx, bundle, ns, id); err != nil {
log.G(ctx).WithError(err).WithField("bundle", bundle.path).
Error("cleaning up after dead shim")
}
@ -353,7 +348,7 @@ func (r *Runtime) loadTasks(ctx context.Context, ns string) ([]*Task, error) {
"id": id,
"namespace": ns,
}).Error("connecting to shim")
err := r.cleanupAfterDeadShim(ctx, bundle, ns, id, pid)
err := r.cleanupAfterDeadShim(ctx, bundle, ns, id)
if err != nil {
log.G(ctx).WithError(err).WithField("bundle", bundle.path).
Error("cleaning up after dead shim")
@ -395,7 +390,13 @@ func (r *Runtime) loadTasks(ctx context.Context, ns string) ([]*Task, error) {
return o, nil
}
func (r *Runtime) cleanupAfterDeadShim(ctx context.Context, bundle *bundle, ns, id string, pid int) error {
func (r *Runtime) cleanupAfterDeadShim(ctx context.Context, bundle *bundle, ns, id string) error {
log.G(ctx).WithFields(logrus.Fields{
"id": id,
"namespace": ns,
}).Warn("cleaning up after shim dead")
pid, _ := runc.ReadPidFile(filepath.Join(bundle.path, proc.InitPidFile))
ctx = namespaces.WithNamespace(ctx, ns)
if err := r.terminate(ctx, bundle, ns, id); err != nil {
if r.config.ShimDebug {
@ -418,6 +419,10 @@ func (r *Runtime) cleanupAfterDeadShim(ctx context.Context, bundle *bundle, ns,
if err := bundle.Delete(); err != nil {
log.G(ctx).WithError(err).Error("delete bundle")
}
// kill shim
if shimPid, err := runc.ReadPidFile(filepath.Join(bundle.path, "shim.pid")); err == nil && shimPid > 0 {
unix.Kill(shimPid, unix.SIGKILL)
}
r.events.Publish(ctx, runtime.TaskDeleteEventTopic, &eventstypes.TaskDelete{
ContainerID: id,

10
runtime/v1/shim/client/client.go
View File

@ -26,6 +26,7 @@ import (
"os"
"os/exec"
"path/filepath"
"strconv"
"strings"
"sync"
"syscall"
@ -110,7 +111,10 @@ func WithStart(binary, address, daemonAddress, cgroup string, debug bool, exitHa
"debug": debug,
}).Infof("shim %s started", binary)
if err := writeAddress(filepath.Join(config.Path, "address"), address); err != nil {
if err := writeFile(filepath.Join(config.Path, "address"), address); err != nil {
return nil, nil, err
}
if err := writeFile(filepath.Join(config.Path, "shim.pid"), strconv.Itoa(cmd.Process.Pid)); err != nil {
return nil, nil, err
}
// set shim in cgroup if it is provided
@ -172,8 +176,8 @@ func newCommand(binary, daemonAddress string, debug bool, config shim.Config, so
return cmd, nil
}
// writeAddress writes a address file atomically
func writeAddress(path, address string) error {
// writeFile writes a address file atomically
func writeFile(path, address string) error {
path, err := filepath.Abs(path)
if err != nil {
return err