bash docker exec 命令的结果
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/34447818/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
The result of docker exec command
提问by Aliance
I need to know in my shell script the output of some docker exec commands, for example I have an nginx container and in my script I run:
我需要在我的 shell 脚本中知道一些 docker exec 命令的输出，例如我有一个 nginx 容器，在我的脚本中我运行：
docker exec -it containerName /etc/init.d/nginx configtest
docker exec -it containerName /etc/init.d/nginx configtest
I want to continue script execution only if nginx config test is success, not when fail.
我想只有在 nginx 配置测试成功时才继续执行脚本，而不是在失败时。
I've tried out to use $?, but it is 0even then configtest output is fail (because docker exec is successfully executed, as I understand).
我试过使用$?，但0即使这样 configtest 输出失败（因为 docker exec 已成功执行，据我所知）。
回答by conradkleinespel
回答by anubhava
Translating my comment into an answer. This should work:
将我的评论翻译成答案。这应该有效：
docker exec -it mynginx /etc/init.d/nginx configtest && echo "pass" || echo "fail"
It works for me.
这个对我有用。
回答by VonC
The api/client/exec.go#L97-L100does get the exit code:
该api/client/exec.go#L97-L100不会得到退出代码：
var status int
if _, status, err = getExecExitCode(cli, execID); err != nil {
return err
}
That comes from api/client/utils.go#L84-L97
那来自 api/client/utils.go#L84-L97
// getExecExitCode perform an inspect on the exec command. It returns
// the running state and the exit code.
func getExecExitCode(cli *DockerCli, execID string) (bool, int, error) {
resp, err := cli.client.ContainerExecInspect(execID)
if err != nil {
// If we can't connect, then the daemon probably died.
if err != lib.ErrConnectionFailed {
return false, -1, err
}
return false, -1, nil
}
return resp.Running, resp.ExitCode, nil
}
So if your command fail, you will get the exit code.
Although, as mentioned here, you could use nginx -tinstead of configtest.
因此，如果您的命令失败，您将获得退出代码。
虽然，正如这里提到的，您可以使用nginx -t代替configtest.
