英文:
How to get exit code for Docker container that is not running
问题
我需要获取处于非运行状态的容器的退出代码。
我知道容器没有在运行，这个信息是从另一个来源获取的。
在Docker的Go SDK中，是否有一种方法可以获取退出代码，而无需等待容器处于特定状态？
例如，ContainerWait的WaitResponse提供了吗？
是否可以简单地使用我已经知道的容器状态调用ContainerWait作为解决方案？还是有更好的解决方案？
我特别希望避免使用ContainerWait，因为我可以看到这个调用非常耗费时间。
如果容器的状态是停止的，每个容器的调用大约需要10毫秒，如果容器处于重新启动状态，则需要20到50毫秒之间的时间。
英文:
I need to get the exit code for containers that are in none running state.
I know the container is not running, I get this information from a different source.
Is there a way in Docker's go SDK to get the exit code, without having to wait for the container to be in a certain state?
As for instance ContainerWait's WaitResponse provide?
Would it be an okay solution to simply call ContainerWait with the state that I already no the container is in? Or is there a better solution?
I am in particular interested in avoiding ContainerWait as I can see the call is quite expensive.
With the call consting ~10ms per container if its state is stopped and a between 20 and 50ms if the contianer is in the restarting state.
答案1
得分: 1
退出代码位于ContainerState结构中。它嵌入在来自(*Client).ContainerInspect()的响应中的State字段中。
例如：
func checkExitStatus(ctx context.Context, client *client.Client, containerID string) error {
inspection, err := client.ContainerInspect(ctx, containerID)
if err != nil {
return err
}
// 可能的值在`ContainerState`文档中列出；似乎没有为这些值定义命名常量。
if inspection.State.Status != "exited" {
return errors.New("容器未退出")
}
if inspection.State.ExitCode != 0 {
return fmt.Errorf("容器以状态 %d 退出", inspection.State.ExitCode)
}
return nil
}
英文:
The exit code is in the ContainerState structure. This is embedded in a State field in the response from (*Client).ContainerInspect().
For example:
func checkExitStatus(ctx context.Context, client *client.Client, containerID string) error {
inspection, err := client.ContainerInspect(ctx, containerID)
if err != nil {
return err
}
// Possible values are listed in the `ContainerState` docs; there do not
// seem to be named constants for these values.
if inspection.State.Status != "exited" {
return errors.New("container is not exited")
}
if inspection.State.ExitCode != 0 {
return fmt.Errorf("container exited with status %d", inspection.State.ExitCode)
}
return nil
}
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