Ruby-on-rails 随时使用 Rails cron，设置环境

Rails cron with whenever, setting the environment

提问by Tony

This question will probably only make sense if you know about the whenever gem for creating cron jobs. I have a task in my schedule.rb like

这个问题可能只有在您了解用于创建 cron 作业的每当 gem 时才有意义。我的 schedule.rb 中有一个任务，比如

every 1.day, :at => '4am' do
  command "cd #{RAILS_ROOT} && rake thinking_sphinx:stop RAILS_ENV=#{RAILS_ENV}"
  command "cd #{RAILS_ROOT} && rake thinking_sphinx:index RAILS_ENV=#{RAILS_ENV}"
  command "cd #{RAILS_ROOT} && rake thinking_sphinx:start RAILS_ENV=#{RAILS_ENV}"
end

However when I update my crontab using

但是，当我使用更新我的 crontab 时

whenever --update-crontab appname --set environment=production

the cron jobs still have RAILS_ENV=development. My tasks on production and development are the same right now, I just need to change the environment variable because thinking_sphinx needs to know the current environment. Any ideas on how to do this?

cron 作业仍然有 RAILS_ENV=development。我现在的生产和开发任务是一样的，我只需要更改环境变量，因为 thinking_sphinx 需要知道当前环境。关于如何做到这一点的任何想法？

Thanks!

谢谢！

采纳答案by Snips

I would consider using the "rake" shortcut to make it even cleaner:

我会考虑使用“耙子”快捷方式使其更干净：

every 1.day, :at => '4am' do
  rake "thinking_sphinx:stop"
  rake "thinking_sphinx:index"
  rake "thinking_sphinx:start"
end

回答by Trung LE

Whenever doesn't detect your environment, it just defaults to using production. You can set the environment for all jobs using set:

只要没有检测到您的环境，它就会默认使用生产。您可以使用 set 为所有作业设置环境：

set :environment, 'staging' 

Or per job:

或每个工作：

every 2.hours do 
  runner 'My.runner', :environment => 'staging' 
end 

回答by Simone Carletti

Don't write the RAILS_ENV variable. It should set it automatically.

不要写 RAILS_ENV 变量。它应该自动设置它。

every 1.day, :at => '4am' do
  command "cd #{RAILS_ROOT} && rake thinking_sphinx:stop"
  command "cd #{RAILS_ROOT} && rake thinking_sphinx:index"
  command "cd #{RAILS_ROOT} && rake thinking_sphinx:start"
end

It works in my app:

它适用于我的应用程序：

every 4.days do
  runner "AnotherModel.prune_old_records"
end

$ whenever --set environment=production
0 0 1,5,9,13,17,21,25,29 * * /Users/weppos/Sites/git/app/script/runner -e production "AnotherModel.prune_old_records"

$ whenever --set environment=development
0 0 1,5,9,13,17,21,25,29 * * /Users/weppos/Sites/git/app/script/runner -e development "AnotherModel.prune_old_records"

回答by yogendra689

For Whenever (0.9.2)

为了 Whenever (0.9.2)

Use the @environmentvariable for environment check:

使用@environment变量进行环境检查：

case @environment

when 'production'

every 1.minutes do

   rake "user:take_sample"

  end

when 'development'

every 1.minutes do

  rake "user:dev_sample"

  end

end

回答by Tim Lowrimore

Something else you may want to try if you're using bundler and capistrano.

如果您使用的是 bundler 和 capistrano，您可能还想尝试其他一些东西。

In your deploy.rb file, when you set the :whenever_command, DO NOTsimply do this:

在您的 deploy.rb 文件中，当您设置 :whenever_command 时，不要简单地执行以下操作：

set :whenever_command, "bundle exec whenever"

Instead, do this:

相反，请执行以下操作：

set(:whenever_command) { "RAILS_ENV=#{rails_env} bundle exec whenever" }

Now, the RAILS_ENV environment variable will be available when the schedule.rb file is loaded, so in schedule.rb you can now do this:

现在，在加载 schedule.rb 文件时，RAILS_ENV 环境变量将可用，因此您现在可以在 schedule.rb 中执行以下操作：

set :environment, ENV['RAILS_ENV']

Voila! You're ready to go.

瞧！你准备好了。

回答by kaczor1984

Watch out if you want to pass more than one param to whenever.
You have to do it like that:

如果您想在任何时候传递多个参数，请注意。
你必须这样做：

whenever --update-crontab appname --set 'environment=production&cron_log=/path/to/log'

回答by Jon R.

This questions has been open a long time so I thought I would share what worked with whenever 0.9.7, Ruby 2.4.0, and RAILS 5.0.1. In the previously mentioned answer there are a lot of close tries but syntax error plagues them. Below is what worked and is very simple approach.

这个问题已经开放了很长时间，所以我想我会在 0.9.7、Ruby 2.4.0 和 RAILS 5.0.1 时分享哪些有用的东西。在前面提到的答案中有很多尝试，但语法错误困扰着他们。以下是有效且非常简单的方法。

schedule.rb

日程表

require File.expand_path(File.dirname(__FILE__) + '/environment')
set :output, {:standard => 'log/cron_log.log', :error => 'log/cron_error_log.log'}
env :PATH, ENV['PATH']

every :day, :at => '10am' do
     rake "somejob:run", :environment => @environment
end

Update the crontab(dev)

更新 crontab(dev)

whenever --set 'environment=development' --update-crontab

Results(dev)

结果（开发）

0 10 * * * /bin/bash -l -c 'cd /my/rails/app && RAILS_ENV=development bundle exec rake somejob:run --silent >> log/cron_log.log 2>> log/cron_error_log.log'

0 10 * * * /bin/bash -l -c 'cd /my/rails/app && RAILS_ENV=development bundle exec rake somejob:run --silent >> log/cron_log.log 2>> log/cron_error_log.log'

Update the crontab(prod)

更新 crontab(prod)

whenever --set 'environment=production' --update-crontab

Results(prod)

结果（产品）

0 10 * * * /bin/bash -l -c 'cd /my/rails/app && RAILS_ENV=production bundle exec rake somejob:run --silent >> log/cron_log.log 2>> log/cron_error_log.log'

0 10 * * * /bin/bash -l -c 'cd /my/rails/app && RAILS_ENV=production bundle exec rake somejob:run --silent >> log/cron_log.log 2>> log/cron_error_log.log'

Hopefully this can help someone out. Happy Coding this!

希望这可以帮助某人。快乐编码这个！

回答by Laurynas

Latest whenever allows easy Capistrano integration. You can add following to deploy.rb:

最新的任何时候都允许轻松的 Capistrano 集成。您可以在 deploy.rb 中添加以下内容：

set :whenever_environment, defer { stage }
set :whenever_identifier, defer { "#{application}-#{stage}" }

require "whenever/capistrano"

回答by Satishakumar Awati

Add the following line of code at top of config/schedule.rb.

在 config/schedule.rb 的顶部添加以下代码行。

 ENV['RAILS_ENV'] = "#{@pre_set_variables[:environment]}"

and update the crontab using following command.

并使用以下命令更新 crontab。

whenever --update-crontab pvcnxt --set 'environment=production'

and then finally restart crontab using command

然后最后使用命令重新启动 crontab

service crond restart

Thats it!

就是这样！

Final config/schedule.rblooks this way

最终的config/schedule.rb看起来像这样

 ENV['RAILS_ENV'] = "#{@pre_set_variables[:environment]}"

 env :PATH, ENV['PATH']

 require File.expand_path(File.dirname(__FILE__) + "/environment")

 set :output, "#{Rails.root}/logs/cron_log_#{ENV['RAILS_ENV']}.log"

 every 1.day, :at => '00:00 am' do
  command "cd #{Rails.root}/lib/tasks && rake clean__posts_table_rake"
 end

回答by Snips

I was having an issue where environment wasn't being set up for whenever cron jobs - /usr/bin/bundle was being picked up instead of /usr/local/bin/bundle.

我遇到了一个问题，即每当 cron 作业时都没有设置环境 - /usr/bin/bundle 而不是 /usr/local/bin/bundle。

The solution was to add following to top of schedule.rb

解决方案是在 schedule.rb 的顶部添加以下内容

env 'PATH', ENV['PATH']