ruby 批量执行命令

shijiang1130

Ruby很多很酷的gem。下面我们来看一个Capistrano

1. C:\>cap shell
   
2.   * 2013-06-24 19:18:08 executing `shell'
   
3. ====================================================================
   
4. Welcome to the interactive Capistrano shell! This is an experimental
   
5. feature, and is liable to change in future releases. Type 'help' for
   
6. a summary of how to use the shell.
   
7. --------------------------------------------------------------------
   
8. cap> on 127.0.0.1 localhost 192.168.1.1 ruby -v

复制代码

shijiang1130

看下官方的capfile

1. # an esay way to connect to all instances
   
2. # cap shell
   
3. 
   
4. set :user, ENV['USER']
   
5. ssh_options[:keys] = "~/.ssh/id_rsa"
   
6. set :use_sudo, false
   
7. 
   
8. raise "USAGE: source ./config/FOLDER/settings.sh && cap fooo" unless ENV['SG_NAME']
   
9. 
   
10. instances = `as-describe-auto-scaling-groups $SG_NAME --region $REGION|grep ^INSTANCE`.split("\n")
    
11. ids = instances.map{|i| i.split(" ")[1]}
    
12. 
    
13. instance_info = `ec2-describe-instances #{ids.join(" ")} --region $REGION|grep ^INSTANCE`
    
14. addresses = instance_info.map{|i| i.split(" ")[3]}
    
15. 
    
16. #puts "addresses: #{addresses.inspect}"
    
17. addresses.each do |address|
    
18.   role :app, "#{address}:22"
    
19. end
    
20. 
    
21. # example to get current queue from haproxy
    
22. task :current_queue do
    
23.   run "curl 'http://username:password@localhost/haproxy?stats;csv' 2> /dev/null  | grep self | awk '{split($0,a,\",\"); print a[3]}'"
    
24. end

复制代码

rubyish

看看我觉得很酷