使用Faric+Git進行分散式程式碼管理

from fabric.api import *
from fabric.colors import *

#伺服器主機列表
#env.hosts=[`username1@host1:port`,`username2@host2:port`]
#如果多個伺服器密碼相同直接使用
#env.password=`password`
#可以使用ssh金鑰來代替密碼訪問遠端主機（更安全），前提是需要將公鑰儲存在遠端主機的authorized_keys檔案中
#env.key_filename=‘~/.ssh/id_rsa`

#若伺服器之間密碼不同，使用passwords變數儲存鍵值對
#env.passwords = {`username1@host1:port`:`password1`,`username2@host2:port`:`password2`}

#使用roledefs進行伺服器角色分組
#env.roledefs = {
#    `role1`: [`username1@host1:port`],[`username2@host2:port`]
#    `role2`: [`[`username3@host3:port`]`]
#}   

#稱為任務函式，可在命令列使用fab local_update:msg=msg 直接呼叫
def local_update(msg):
    #列印紅色字型
    print red(`local host:ali_ibignose`)
    #列印綠色字型
    print green(`local git pushing...`)
    #lcd為本地的cd操作
    with lcd(`/home/omniREST/`):
        #如果當前沒有新的更改直接使用commit會終止任務進行，所以將此中斷設定僅為輸出警告資訊
        with settings(warn_only=True):
            #local為在本地執行命令
            local(`git add *`)
            local(`git commit -m "%s"` % msg)
        local(`git push -u origin master`)
    print green(`local git push complete!`)

#parallel註解的作用是可以使函式並行執行，可用在多個伺服器同時進行同一個任務函式     
#@parallel                                                            
def local_docker_restart():
    print red(`local host:ali_ibignose`)
    print green(`local docker restarting...`)
    local(`docker restart omniREST ./root/run.sh`)
    print green(`local docker restart complete!`)

#設定角色使用roles註解，那麼該任務函式將會在所有角色為role1的機器上執行
#@roles(`role1`)
def remote1_update():
    #也可直接在任務函式中指明連線主機的資訊
    env.user=`username`
    env.host_string=`username@host:port`
    env.password=`password`
    print red(`remote host:nc_test`)
    print green(`remote git pulling...`)
    #cd為遠端cd操作
    with cd(`/home/omniREST/tomcat/webapps/ROOT`):
        #run為遠端執行命令操作
        run(`git pull origin master`)
    print green(`remote git pull complete!`)
    print ``
    print green(`remote tomcat restarting...`)
    with cd(`/home/omniREST/tomcat/bin`):
        run(`./shutdown.sh`)
        run(`nohup ./startup.sh`)
    print green(`remote tomcat restart complete!`)

def remote2_update():
    print red(`remote host:ibignose`)
    print green(`remote git pulling...`)
    with cd(`/data2/usr/ibignose/tomcat/webapps/ROOT`):
        run(`git pull origin master`)
    print green(`remote git pull complete!`)
    print ``
    print green(`remote tomcat restarting...`)
    with cd(`/data2/usr/ibignose/tomcat/bin`):
        run(`./shutdown.sh`)
        run(`nohup ./startup.sh`)
    print green(`remote tomcat restart complete!`)

#可以在命令列直接使用fab update:msg=msg 來呼叫所有任務函式
#執行流程為從上到下，一旦遇到終止性的錯誤將不會繼續執行
def update(msg):
    local_update(msg)
    print ``
    local_docker_restart
    print ``
    remote1_update()
    print ``
    remote2_update()

#遍歷字典方式操作多伺服器
dict_host={`ibignose`:`root@42.62.50.218:22`,`nc_test`:`root@54.223.196.153:22`}
dict_user={`ibignose`:`root`,`nc_test`:`root`}
dict_pwd={`ibignose`:`richardg@b83a6fa8`,`nc_test`:`T6yuj&hg`}
dict_path={`ibignose`:`/data2/usr/ibignose/tomcat`,`nc_test`:`/home/omniREST/tomcat`}

  
def remote_update():
    for hostname,host in dict_host.iteritems():
        env.user=`%s` % dict_user[hostname]
        env.host_string=`%s` % host
        env.password=`%s` % dict_pwd[hostname]
        print red(`remote hostname:%s` % hostname)
        print green(`remote git pulling...`)
        with cd(`%s/webapps/ROOT` % dict_path[hostname]):  
            run(`git pull origin master`)  
        print green(`remote git pull complete!`)  
        print ``  
        print green(`remote tomcat restarting...`)  
        with cd(`%s/bin` % dict_path[hostname]):  
            run(`./shutdown.sh`)  
            run(`nohup ./startup.sh`)  
        print green(`remote tomcat restart complete!`)