使用Docker运行单个NodeJS脚本并能够使用Ctrl-C终止它的最简单方法是什么 [英] What is the easiest way to run a single NodeJS script using Docker and be able to terminate it with Ctrl-C

问题描述

从Docker文档中得出的结论是，如果您要运行独立的NodeJS脚本，则应使用以下命令：

Taken from Docker's documentation that if you want to run a standalone NodeJS script you are supposed to use the following command:

docker run- --rm --name my-running-script -v $ PWD：/ usr / src / app -w / usr / src / app node：8节点your-daemon-or-script.js

除了无法使用Ctrl-C停止脚本外，此方法有效。我该如何实现？

This works except that it's not possible to stop the script using Ctrl-C. How can I achieve that?

这是我的script.js：

Here is my script.js:

console.log('Started - now try to kill me...');

setTimeout(function () {
   console.log('End of life.');
}, 10000);

推荐答案

此注释隐藏在扩展了 docker run 文档：

This note is hidden in the extended docker run documentation:

注意： Linux会特别对待在容器内以PID 1运行的进程：默认操作会忽略任何信号。因此，除非经过编码，否则该过程不会在 SIGINT 或 SIGTERM 上终止。

Note: A process running as PID 1 inside a container is treated specially by Linux: it ignores any signal with the default action. So, the process will not terminate on SIGINT or SIGTERM unless it is coded to do so.

主要Docker容器进程（您容器的 ENTRYPOINT 或 CMD 或在命令行上指定的等效项）在容器内作为进程ID 1运行。通常，这是为特殊的init进程保留的，并且在某些方面是特殊的。

The main Docker container process (your container's ENTRYPOINT or CMD or the equivalent specified on the command line) runs as process ID 1 inside the container. This is normally reserved for a special init process and is special in a couple of ways.

可能最简单的答案是让Docker为您注入一个PID为PID的init进程。通过在 docker run 命令中添加-init 。

Possibly the simplest answer is to let Docker inject an init process for you as PID 1 by adding --init to your docker run command.

或者，您可以在Node上注册信号事件显式处理 SIGINT 。例如，如果我将您的脚本扩展为具有

Alternatively, on Node you can register a signal event to explicitly handle SIGINT. For example, if I extend your script to have

process.on('SIGINT', function() {
    process.exit();
});

然后重建图像并重新运行它，它响应^ C。

and then rebuild the image and re-run it, it responds to ^C.

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