问题

以前就用 whenever + backup 备份，貌似没什么问题。 这次服务器迁移，就想着要不把 whenever 与 capistrano 3 结合，可是一键部署的时候出错了，错误信息摘要如下

INFO : Running ~/.rvm/bin/rvm 2.2.0 do bundle exec whenever --update-crontab weekly_production --set environment=production --roles=app,web,db as deploy@xxx
DEBUG:  Command: cd /app/www/weekly/releases/20150408084632 && ~/.rvm/bin/rvm 2.2.0 do bundle exec whenever --update-crontab weekly_production --set environment=production --roles=app,web,db

  DEBUG           .../whenever-0.9.4/lib/whenever/numeric_seconds.rb:12:in `gsub'
  DEBUG             invalid byte sequence in US-ASCII (ArgumentError)
  DEBUG     
  DEBUG         from .../whenever-0.9.4/lib/whenever/numeric_seconds.rb:12:in `process_string'
  DEBUG         from .../whenever-0.9.4/lib/whenever/job_list.rb:25:in `initialize'
  DEBUG         from .../whenever-0.9.4/lib/whenever.rb:10:in `new' 
  DEBUG             from .../whenever-0.9.4/lib/whenever.rb:10:in `cron'    
  DEBUG             from .../whenever-0.9.4/lib/whenever/command_line.rb:54:in `whenever_cron'
  DEBUG         from .../whenever-0.9.4/lib/whenever/command_line.rb:106:in `updated_crontab'       
  DEBUG             from .../whenever-0.9.4/lib/whenever/command_line.rb:35:in `run'    
  DEBUG             from .../whenever-0.9.4/lib/whenever/command_line.rb:6:in `execute'
  DEBUG         from .../whenever-0.9.4/bin/whenever:41:in `<top (required)>'
  DEBUG         from /app/www/weekly/shared/bundle/ruby/2.2.0/bin/whenever:23:in `load'
  DEBUG         from /app/www/weekly/shared/bundle/ruby/2.2.0/bin/whenever:23:in `<main>'
(Backtrace restricted to imported tasks)
cap aborted!

Tasks: TOP => whenever:update_crontab

然后我就看了看，貌似系统是 utf8 的啊，哪来的 US-ASCII？

$locale

LANG=en_US.UTF-8
LANGUAGE=en_US:
LC_CTYPE=zh_CN.UTF-8
LC_NUMERIC="en_US.UTF-8"
LC_TIME="en_US.UTF-8"
LC_COLLATE="en_US.UTF-8"
LC_MONETARY="en_US.UTF-8"
LC_MESSAGES="en_US.UTF-8"
LC_PAPER="en_US.UTF-8"
LC_NAME="en_US.UTF-8"
LC_ADDRESS="en_US.UTF-8"
LC_TELEPHONE="en_US.UTF-8"
LC_MEASUREMENT="en_US.UTF-8"
LC_IDENTIFICATION="en_US.UTF-8"
LC_ALL=

到底是哪里出错了？没想明白……

解决方案

后来看了看，想是不是

LANGUAGE=en_US:
LC_CTYPE=zh_CN.UTF-8

两句有冲突。本来我是改为用 en_US.UTF-8 的，但不知道为什么说 LC_CTYPE 修改不了。 我就决定要不全改为 zh_CN.UTF-8 吧。

1. 修改 locale 文件

   sudo vi /etc/default/locale
   

   修改为： LANG="zh_CN.UTF-8" LANGUAGE="zh_CN:"

2. 执行 shell 命令

   export LANGUAGE=zh_CN.UTF-8
   export LANG=zh_CN.UTF-8
   sudo locale-gen zh_CN.UTF-8
   

3. 检查

$ locale
LANG=zh_CN.UTF-8
LANGUAGE=zh_CN:
LC_CTYPE=zh_CN.UTF-8
LC_NUMERIC="zh_CN.UTF-8"
LC_TIME="zh_CN.UTF-8"
LC_COLLATE="zh_CN.UTF-8"
LC_MONETARY="zh_CN.UTF-8"
LC_MESSAGES="zh_CN.UTF-8"
LC_PAPER="zh_CN.UTF-8"
LC_NAME="zh_CN.UTF-8"
LC_ADDRESS="zh_CN.UTF-8"
LC_TELEPHONE="zh_CN.UTF-8"
LC_MEASUREMENT="zh_CN.UTF-8"
LC_IDENTIFICATION="zh_CN.UTF-8"
LC_ALL=

再 capistrano 一键部署就成功了