cron为什么不执行我的node.js脚本？

问题描述

我希望我的服务器每分钟执行一次节点脚本。如果我手动执行文件（ ./ main.js ），该程序将完美执行，因此，我确定这不是问题。但是，当我将其交给cron执行时，什么也没发生。

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文件中的行。

Here's the line from the cron file.

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

这是示例日志：

10月11日15:21:01服务器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);

有人知道我为什么要保持无线电静音吗？

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

更新：

我相信问题与我的问题有关相对文件路径，并且main.js从其自己的目录外部执行。

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

所以现在，我将 exe.sh 放入了 wudu 目录。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，并且按预期工作。但是，cron仍然没有接过。

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

在shell脚本中封装执行，很可能在cron中执行的脚本没有设置相同的环境

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中开始执行shell脚本。 & PATH

（如果需要这些值，请在命令行上输入： 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条目如下：

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

只需确保将实际值替换为 NODE_PATH & PATH 以及您从第一次执行的 echo 命令获得的内容。

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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