为什么我不能用crontab启动delayed_job守护进程？
为什么我不能用crontab启动delayed_job守护进程？
提问于 2012-07-01 14:21:50
我有以下脚本，用于在ruby on rails中启动延迟的作业工作程序
require 'rubygems'
require 'daemon_spawn'
$: << '.'
RAILS_ROOT = File.expand_path(File.join(File.dirname(__FILE__), '..'))
class DelayedJobWorker < DaemonSpawn::Base
def start(args)
ENV['RAILS_ENV'] ||= args.first || 'development'
Dir.chdir RAILS_ROOT
require File.join('config', 'environment')
Delayed::Worker.new.start
end
def stop
system("kill `cat #{RAILS_ROOT}/tmp/pids/delayed_job.pid`")
end
end
DelayedJobWorker.spawn!(:log_file => File.join(RAILS_ROOT, "log", "delayed_job.log"),
:pid_file => File.join(RAILS_ROOT, 'tmp', 'pids', 'delayed_job.pid'),
:sync_log => true,
:working_dir => RAILS_ROOT)它以下面的命令开始
user@mysystem:path/to/my/application$ ruby script/delayed_job start production
DelayedJobWorker started.我正在尝试使用crontab在启动时自动执行此操作
为了做到这一点，我制作了这个脚本
#!/bin/bash
cd path/to/my/application
ruby script/delayed_job start production这是我的crontab
# m h dom mon dow command
SHELL=/bin/bash
@reboot /path/to/my/script/delayed_job_at_startup.sh当我重新启动系统时，脚本不成功，并且我从crontab收到以下消息
X-Cron-Env: <SHELL=/bin/bash>
X-Cron-Env: <HOME=/home/finalsayan>
X-Cron-Env: <PATH=/usr/bin:/bin>
X-Cron-Env: <LOGNAME=finalsayan>
/usr/local/rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require': cannot load such file -- daemon_spawn (LoadError)
from /usr/local/rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
from script/delayed_job:24:in `<main>'谢谢你的帮助
回答 1
Stack Overflow用户
回答已采纳
发布于 2012-07-02 00:24:48
问题在于，要在rvm中使用cron，您必须加载rvm环境以获取文档，请参阅https://rvm.io/integration/cron/。cron在启动时调用的脚本如下所示
#!/bin/bash
source /usr/local/rvm/environments/default
# Go to the app
APP_HOME=/path/to/my/application
cd $APP_HOME
# start the delayed jobs
ruby script/delayed_job start production 页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/11280004
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