Use fabric and svn to deploy code to multi servers.

fabfile.py

import os
from fabric.api import task, run, env, cd

'''
* fab version
* fab deploy user:password:version
* fab reload_ui
'''
__author__ = 'notsobad'

env.key_filename = '~/.ssh/ui.rsa'
env.hosts = ['ui1', 'ui2']

def run_app(cmd):
	if env.user == 'root':
		cmd = 'sudo -u app %s' % cmd
	return run(cmd)

@task
def version():
	run_app('svnversion /home/notsobad/ui')

@task
def reload_ui():
	run_app('touch /tmp/.ui-reload')

@task
def deploy(username, password, to_version):
	with cd('/home/notsobad/ui'):
		cmd = 'svn up -r {to_version} --username {username} --password "{password}" .'.format(username=username, password=password, to_version=to_version)
		run_app(cmd)