使用fabric切换到不同的用户

我最近开始研究用于远程部署的结构.我需要切换到diff用户(从我登录的用户),我无法弄明白.甚至是可能的,如果是这样的话怎么样？我当前的用户没有sudo权限.

我尝试更改以下环境变量

env.sudo_prefix = "su newUser -c "
env.sudo_prompt = "Password:"

但是Fabric不会等待'newUser'的密码输入而失败.

out: Password: 
[oldUser@ec2-111-11-111-111.compute-1.amazonaws.com] out: su: incorrect password

Fatal error: sudo() received nonzero return code 1 while executing!

Requested: touch x
Executed: su newUser -c  -u "root"  /bin/bash -l -c "cd /home/oldUser/upgrade && touch x"

Aborting.
Disconnecting from oldUser@ec2-111-11-111-111.compute-1.amazonaws.com... done.

更新:

正如JF Sebastian建议的那样,su newUser -c但它会为每个服务器的每个命令提示密码,这会破坏自动化的目的.Fabric中是否有任何方法可以根据提示传递相同的值(在这种情况下,它始终是Password:)

谢谢JF Sebastian,有几次捕获.

Fabric会延迟连接,所以我必须在调用su之前进行虚拟连接以避免上下文切换.

Pwd需要存储在全局范围内,以便可以重复使用.Fabric不会将其放在高速缓存中以覆盖su命令.

这是最终做的事情.它的工作.

pwd = None
@hosts('myhost.com')
def test():
    with cd('/home/oldUser/upgrade'):
        run('ls')  #This is to connect aggressively (instead of lazily)
        global pwd  #Change the scope of pwd
        if pwd is None:
            pwd = getpass.getpass('enter password for newUser')

        execute(su, pwd, 'newUser', 'touch x')  
        run ('ls')
        execute(su, pwd, 'newUser', 'rm x') 
        run ('ls')

def su(pwd, user, command):
    with settings(
        password= "%s" % pwd,
        sudo_prefix="su %s -c " % user,
        sudo_prompt="Password:"
        ):
        sudo(command)

如果你不能ssh as newuser并且不能使用sudo(command, user='newuser'):

import getpass # just for demonstration
from fabric.api import sudo, settings

def su(user, command):
    with settings(password=getpass.getpass('enter password for %s: ' % user),
                  sudo_prefix="su %s -c " % user,
                  sudo_prompt="Password:"):
        sudo(command)