104 lines
2.4 KiB
Go
104 lines
2.4 KiB
Go
/*
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Copyright The containerd Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package monitor
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import (
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"context"
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"fmt"
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"net/url"
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"strconv"
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"syscall"
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containerd "github.com/containerd/containerd/v2/client"
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"github.com/containerd/containerd/v2/core/runtime/restart"
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"github.com/containerd/containerd/v2/pkg/cio"
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)
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type stopChange struct {
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container containerd.Container
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}
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func (s *stopChange) apply(ctx context.Context, client *containerd.Client) error {
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return killTask(ctx, s.container)
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}
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type startChange struct {
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container containerd.Container
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logURI string
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count int
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}
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func (s *startChange) apply(ctx context.Context, client *containerd.Client) error {
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log := cio.NullIO
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spec, err := s.container.Spec(ctx)
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if err != nil {
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return err
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}
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useTTY := spec.Process.Terminal
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if s.logURI != "" {
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uri, err := url.Parse(s.logURI)
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if err != nil {
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return fmt.Errorf("failed to parse %v into url: %w", s.logURI, err)
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}
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if useTTY {
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log = cio.TerminalLogURI(uri)
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} else {
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log = cio.LogURI(uri)
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}
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}
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if s.count > 0 {
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labels := map[string]string{
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restart.CountLabel: strconv.Itoa(s.count),
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}
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opt := containerd.WithAdditionalContainerLabels(labels)
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if err := s.container.Update(ctx, containerd.UpdateContainerOpts(opt)); err != nil {
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return err
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}
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}
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killTask(ctx, s.container)
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task, err := s.container.NewTask(ctx, log)
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if err != nil {
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return err
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}
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return task.Start(ctx)
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}
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func killTask(ctx context.Context, container containerd.Container) error {
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task, err := container.Task(ctx, nil)
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if err == nil {
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wait, err := task.Wait(ctx)
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if err != nil {
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if _, derr := task.Delete(ctx); derr == nil {
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return nil
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}
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return err
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}
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if err := task.Kill(ctx, syscall.SIGKILL, containerd.WithKillAll); err != nil {
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if _, derr := task.Delete(ctx); derr == nil {
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return nil
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}
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return err
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}
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<-wait
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if _, err := task.Delete(ctx); err != nil {
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return err
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}
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}
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return nil
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}
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