github.com/demonoid81/containerd@v1.3.4/runtime/restart/monitor/change.go (about)

     1  /*
     2     Copyright The containerd Authors.
     3  
     4     Licensed under the Apache License, Version 2.0 (the "License");
     5     you may not use this file except in compliance with the License.
     6     You may obtain a copy of the License at
     7  
     8         http://www.apache.org/licenses/LICENSE-2.0
     9  
    10     Unless required by applicable law or agreed to in writing, software
    11     distributed under the License is distributed on an "AS IS" BASIS,
    12     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13     See the License for the specific language governing permissions and
    14     limitations under the License.
    15  */
    16  
    17  package monitor
    18  
    19  import (
    20  	"context"
    21  	"syscall"
    22  
    23  	"github.com/containerd/containerd"
    24  	"github.com/containerd/containerd/cio"
    25  )
    26  
    27  type stopChange struct {
    28  	container containerd.Container
    29  }
    30  
    31  func (s *stopChange) apply(ctx context.Context, client *containerd.Client) error {
    32  	return killTask(ctx, s.container)
    33  }
    34  
    35  type startChange struct {
    36  	container containerd.Container
    37  	logPath   string
    38  }
    39  
    40  func (s *startChange) apply(ctx context.Context, client *containerd.Client) error {
    41  	log := cio.NullIO
    42  	if s.logPath != "" {
    43  		log = cio.LogFile(s.logPath)
    44  	}
    45  	killTask(ctx, s.container)
    46  	task, err := s.container.NewTask(ctx, log)
    47  	if err != nil {
    48  		return err
    49  	}
    50  	return task.Start(ctx)
    51  }
    52  
    53  func killTask(ctx context.Context, container containerd.Container) error {
    54  	task, err := container.Task(ctx, nil)
    55  	if err == nil {
    56  		wait, err := task.Wait(ctx)
    57  		if err != nil {
    58  			if _, derr := task.Delete(ctx); derr == nil {
    59  				return nil
    60  			}
    61  			return err
    62  		}
    63  		if err := task.Kill(ctx, syscall.SIGKILL, containerd.WithKillAll); err != nil {
    64  			if _, derr := task.Delete(ctx); derr == nil {
    65  				return nil
    66  			}
    67  			return err
    68  		}
    69  		<-wait
    70  		if _, err := task.Delete(ctx); err != nil {
    71  			return err
    72  		}
    73  	}
    74  	return nil
    75  }