每当gem：我设置：output，但日志文件没有显示在我期望的位置 [英] whenever gem: I set :output but the logfile doesn't show up where I'd expect it to

问题描述

在我的 schedule.rb 文件中，有以下几行：

In my schedule.rb file I have the following lines:

set :output, '/log/cron_log.log'

every 5.minutes do
  command 'echo "hello"'
end

我每次在的情况下都运行 Rails，无论何时在开发中使用gem ，我都假定cronfile已编写并正在运行。 （我也尝试过重新启动Rails服务器。）

I ran whenever -w as suggested in this question Rails, using whenever gem in development, and I assume the cronfile is written and running. (I tried restarting the Rails server as well.)

当我运行 $ crontab -l <​​/ code>时，我看到了以下：

And when I run $ crontab -l I see the following:

0,5,10,15,20,25,30,35,40,45,50,55 * * * * /bin/bash
-l -c 'echo "hello" >> /log/cron_log.log 2>&1'

但我找不到日志文件。我检查了rails_project / log，〜/ log和/ log无济于事。在OSX btw上。

But I can't find the log file. I checked in rails_project/log, ~/log and /log to no avail. On OSX btw.

如何将日志文件写入Rails项目日志文件夹？

推荐答案

您的日志在哪里？

您要将输出文件放在最高目录级别：

Where is your log?

You're putting the output file at the highest directory level:

$ cd /log

要查看文件是否存在以及文件中是否包含数据：

To see if the file exists and if it has data in it:

$ ls -la cron_log.log

根据需要创建日志文件：

To create the log file if needed:

$ touch cron_log.log

打开您的权限自己的本地调试（请勿在生产环境中执行！）

To open up permissions for your own local debugging (do NOT do this in production!)

$ chmod +rw cron_log.log  

命令是​​否正在运行？

要手动运行命令以找出答案如果它按您的预期工作：

Is your command running?

To run the command manually to find out if it works as you expect:

$ /bin/bash -l -c 'echo "hello" >> /log/cron_log.log 2>&1'

为提高安全性并保护您的路径，使用完整路径：

To improve your security and protect your path, use full paths:

wrong: command 'echo "hello"'
right: command '/bin/echo "hello"'

查找命令的完整路径：

$ which echo

$ sudo grep CRON /var/log/syslog

grep结果中应包含以下内容：

The grep result should have lines that something like this:

Jan 1 12:00:00 example.com CRON[123]: (root) CMD (... your command here ...)

您在Mac上吗？

如果您未在系统日志中看到输出，而您正在使用Mac，您可能需要阅读有关Mac OSX从 cron 转换为 launchd 的信息。

请参阅cron plist（/System/Library/LaunchDaemons/com.vix.cron.plist）并用作tdout / stderr调试cron本身的路径。我不记得是否足以启动launchctl并加载plist来启动launchctl，或者因为它是系统守护程序，所以您必须完全重新启动。 （请参阅狮子中的cron日志文件在哪里 ）

See the cron plist (/System/Library/LaunchDaemons/com.vix.cron.plist) and use a stdout/stderr path to debug cron itself. I don't recall if launchctl unloading and launchctl loading the plist is sufficient, or since it's a system daemon if you'd have to restart entirely. (see where is the cron log file in lion)

要相对于Rails应用程序记录日志，请省略斜杠（通常称为cron.log）

To put the log relative to a Rails app, omit the leading slash (and typically call it cron.log)

set :output, "log/cron.log"

要将日志放入特定的标准目录中：

To put the log in a specific fully-qualified directory:

set :output, '/abc/def/ghi/log/cron.log'

Theeverever Wiki提供了一些有关重定向输出的很好的示例：

The Whenever wiki has some good examples about redirecting output:

https://github.com/javan/whenever/wiki/Output-redirection-aka-logging-your-cron-jobs

示例：

every 3.hours do
  runner "MyModel.some_process", :output => 'cron.log'     
  rake "my:rake:task", :output => {:error => 'error.log', :standard => 'cron.log'}
  command "/usr/bin/cmd"
end  

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