用capistrano写一个简单的deploy脚本

setp 1:

Ruby代码


gem install capistrano

gem install capistrano-ext

setp 2: 在项目根目录执行

Ruby代码


capify .

这将在根目录创建Capfile 和 config目录下创建deploy.rb 文件

setp 3: 编辑deploy.rb

Ruby代码


require 'bundler/capistrano' #添加之后部署时会调用bundle install， 如果不需要就可以注释掉

require "capistrano/ext/multistage" #多stage部署所需

set :stages, %w(development production)

set :default_stage, "development"

set :application, "crm_app_end" #应用名称

set :repository, "https://chang.abc.com/svn/engineering/vwaccount/mydeploy/trunk"

set :keep_releases, 5 #只保留5个备份

set :deploy_to, "/var/www/#{application}" #部署到远程机器的路径

set :user, "user1" #登录部署机器的用户名

set :password, "user1" #登录部署机器的密码， 如果不设部署时需要输入密码

default_run_options[:pty] = true #pty: 伪登录设备

#default_run_options[:shell] = false #Disable sh wrapping

set :use_sudo, true #执行的命令中含有sudo， 如果设为false， 用户所有操作都有权限

set :runner, "user2" #以user2用户启动服务

set :svn_username, "xxxx"

set :scm, :subversion #

# Or: `accurev`, `bzr`, `cvs`, `darcs`, `git`, `mercurial`, `perforce`, `subversion` or `none`

#set :deploy_via, :copy #如果SCM设为空， 也可通过直接copy本地repo部署

#set :domain, "crm.abc.com" #custom define

role :web, "192.168.0.13", "192.168.0.117" # Your HTTP server, Apache/etc

role :app, "192.168.0.13", "192.168.0.117" # This may be the same as your `Web` server

role :db, "192.168.0.13", :primary => true # This is where Rails migrations will run

#role :db, "your slave db-server here"

#

namespace :deploy do

desc "remove and destory this app"

task :destory, :roles => :app do

run "cd #{deploy_to}/../ && #{try_sudo} mv #{application} /tmp/#{application}_#{Time.now.strftime('%Y%d%m%H%M%S')}" #try_sudo 以sudo权限执行命令

end

after "deploy:update", "deploy:shared:setup" #after， before 表示在特定操作之后或之前执行其他任务

namespace :shared do

desc "setup shared folder symblink"

task :setup do

run "cd #{deploy_to}/current; rm -rf shared; ln -s #{shared_path} ."

end

end

after "deploy:setup", "deploy:setup_chown"

desc "change owner from root to user1"

task :setup_chown do

run "cd #{deploy_to}/../ && #{try_sudo} chown -R #{user}:#{user} #{application}"

end

task :start do

run "cd #{deploy_to}/current && ./crmd.sh start"

#try_sudo "cd #{deploy_to}/current && ./restart.sh"

end

task :stop do

run "cd #{deploy_to}/current && ./crmd.sh stop"

end

task :restart do

run "cd #{deploy_to}/current && ./crmd.sh restart"

end

end

setup 4: 在项目根目录执行

Ruby代码


cap deploy:setup #建立部署路径

cap deploy:update #部署

cap deploy:start #启动服务

cap deploy:stop #停止服务

cap deploy:restart #重启服务

setup 5: 如果有多个stage要部署，则在config下创建deploy文件夹， 在该文件夹下有各stages文件, 文件名和
set :stages, %w(development production) 对应， 如development.rb
production.rb，在各文件中设置相应变量即可， 然后可用 cap production deploy:...
来执行对应production的操作

其实capistrano最终都是转变成shell命令来完成任务的， 所以纯粹用shell脚本也可以完成相应功能，
但相对于晦涩的shell命令， capistrano明显更好懂， 并且它有很多默认操作非常好用， 比如setup， update，
如果自己用shell来实现非常麻烦， capistrano允许在脚本中嵌入shell， 比如上面的start， restart等， 这非常方便，
很多capistrano做不到的就可以用shell去搞定了

这事最近又有了新进展，我在一个django项目中用capistrano来发布，虽然python下也有一个叫fabric的东西，但那个还不熟，先用这个，有时间学习一下fabric再说

require 'bundler/capistrano' #添加之后部署时会调用bundle install， 如果不需要就可以注释掉

Ruby代码


#require "capistrano/ext/multistage" #多stage部署所需

set :application, "app" #应用名称

set :scm, :subversion

set :repository, "svn://0.0.0.0/trunk/src"

set :keep_releases, 5 #只保留5个备份

set :deploy_to, "/var/www/#{application}" #部署到远程机器的路径

set :user, "xxx" #登录部署机器的用户名

set :password, "xxxxx" #登录部署机器的密码， 如果不设部署时需要输入密码

default_run_options[:pty] = true #pty: 伪登录设备

#default_run_options[:shell] = false #Disable sh wrapping

#set :use_sudo, true #执行的命令中含有sudo， 如果设为false， 用户所有操作都有权限

set :runner, "xxxx" #以用户启动服务

#set :deploy_via, :copy #如果SCM设为空， 也可通过直接copy本地repo部署

role :web, "172.16.120.222"#, "192.168.0.117" # Your HTTP server, Apache/etc

role :app, "172.16.120.222"#, "192.168.0.117" # This may be the same as your `Web` server

role :db, "172.16.120.222", :primary => true # This is where Rails migrations will run

#role :db, "your slave db-server here"

#

namespace :deploy do

desc "remove and destory this app"

task :destory, :roles => :app do

run "cd #{deploy_to}/../ && #{try_sudo} mv #{application} /tmp/#{application}_#{Time.now.strftime('%Y%d%m%H%M%S')}" #try_sudo 以sudo权限执行命令

end

# after "deploy:setup", "deploy:setting_link"

# desc "symlink for settings.py"

# task :setting_link do

# run "cd #{deploy_to}; #{try_sudo} touch current; #{try_sudo} ln -s current releases/#{application}"

# end

after "deploy:update", "deploy:shared:setup" #after， before 表示在特定操作之后或之前执行其他任务

namespace :shared do

desc "setup shared folder symblink"

task :setup do

run "cd #{deploy_to}/current; ln -s #{shared_path} x"

run "cd #{deploy_to}/current; rm -rf log; ln -s #{shared_path}/log log"

run "cd #{deploy_to}/releases; rm -f #{application} && __realversion__=`realpath ../current` && ln -s $__realversion__ #{application}"

end

end

after "deploy:setup", "deploy:setup_chown"

desc "change owner from root to user1"

task :setup_chown do

run "cd #{deploy_to}/../ && #{try_sudo} chown -R #{user}:#{user} #{application}"

end

task :default do

transaction do

update_code

symlink

end

end

task :update_code, :except => { :no_release => true } do

on_rollback { run "rm -rf #{release_path}; true" }

strategy.deploy!

end

before "deploy:rollback", "deploy:clean_adaptive"

task :clean_adaptive do

run "cd #{deploy_to}/releases; rm -f #{application}"

end

after "deploy:rollback", "deploy:rollback_set"

task :rollback_set do

run "cd #{deploy_to}/releases; rm -f #{application} && __realversion__=`realpath ../current` && ln -s $__realversion__ #{application}"

end

task :start do

run "cd #{deploy_to}/current && ./adaptive_pool.sh start"

run "cd #{deploy_to}/current && ./adaptive_exam.sh start"

end

task :stop do

run "cd #{deploy_to}/current && ./adaptive_pool.sh stop"

run "cd #{deploy_to}/current && ./adaptive_exam.sh stop"

end

task :restart do

run "cd #{deploy_to}/current && ./adaptive_pool.sh restart"

run "cd #{deploy_to}/current && ./adaptive_exam.sh restart"

end

end

使用Capistrano部署rails: http://beifenggo.iteye.com/blog/1021772
使用 Capistrano 对rails app进行快速部署: /article/4109214.html