为什么 cron 不会执行我的 node.js 脚本? [英] Why won't cron execute my node.js script?

问题描述

我希望我的服务器每分钟执行一个节点脚本.如果我手动执行文件 (./main.js)，程序会完美执行，所以我很确定这不是问题.但是当我将它交给 cron 执行时，什么也没有发生.

I want my server to execute a node script every minute. The program executes perfectly if I execute the file manually (./main.js), so I'm pretty sure it's not the problem. But when I hand it over to cron to execute, nothing happens.

这是 cron 文件中的一行.

Here's the line from the cron file.

*/1 * * * */home/bryce/scripts/wudu/main.js

这是一个示例日志:

Oct 11 15:21:01 server CROND[2564]: (root) CMD (/home/bryce/scripts/wudu/main.js)

可执行文件:home/bryce/scripts/wudu/main.js

#!/usr/bin/env node

var program = require('commander');
var v = require('./cli/validation');
var a = require('./cli/actions');

program
  .version('0.0.1')
  .option('-u, --url', 'Register url')
  .option('-s, --selector', 'Register selector')
  .option('-p, --pagination', 'Register pagination')
  .option('-i, --index', 'Pass an index, to destroy')
  .parse(process.argv);

var args = process.argv.slice(2),
        mode = v.mode(args[0]),
        options = v.hasArgs(mode, program);

a.init(mode, options);

知道为什么我的无线电静音了吗?我应该在其他地方调试吗?

Any idea why I'm getting radio silence? Somewhere else I should be looking to debug?

更新:

我相信问题与我的相对文件路径有关，并且 main.js 是从它自己的目录之外执行的.

I believe the problem has to do with my relative filepaths, and main.js being executed from outside its own directory.

现在，我已经将 exe.sh 放在 wudu 目录中.它看起来像这样:

So now, I've placed exe.sh in the wudu directory. It looks like this:

#!/bin/bash

cd ${0%/*}
./main.js mail

exit

现在，我已将 cron 设置为每分钟执行一次此文件.我尝试从其他文件夹执行此文件，它按预期工作.但是，cron 并没有发现它.

Now, I've set cron to execute this file every minute. I tried executing this file from other folders, and it works as expected. But again, cron isn't picking it up.

推荐答案

将执行包装在一个 shell 脚本中，很可能该脚本在 cron 中的执行与从命令行运行时的环境设置不同.

Wrapping the execution in a shell script, it's likely the execution of the script in cron doesn't have the same environment set as when you run from the command line.

尝试通过设置 NODE_PATH & 在 cron 中预先执行 shell 脚本<代码>路径
(如果您需要这些值，请在命令行输入:echo $NODE_PATH 和 echo $PATH)

Try prefacing the execution of the shell script in cron with setting NODE_PATH & PATH
(if you need these values, on a command line type: echo $NODE_PATH and echo $PATH)

因此，您的 cron 条目将如下所示:

So, your cron entry would look like:

*/1 * * * * NODE_PATH=/usr/local/lib/node_modules PATH=/opt/local/bin:ABC:XYZ /home/bryce/scripts/wudu/exe.sh

只需确保用实际值替换 NODE_PATH &PATH 包含您从第一次执行的 echo 命令中获得的内容.

Just make sure to substitute the actual values for NODE_PATH & PATH with what you get from the echo commands that you first did.

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