Fabric - 在所有任务完成之前和之后在本地运行命令

Question

我正在尝试在我的结构脚本中宣布部署开始和结束。感觉这应该很容易，但对于我的生活，我不知道该怎么做。

env.hosts = ['www1', 'www2', 'www3', 'www4']


def announce_start(): 
    # code to connect to irc server and announce deployment begins
    pass


def announce_finish(): 
    # code to connect to irc server and announce deployment finishes
    pass


def deploy():
    # actual deployment code here
    pass

这是我尝试过的：

如果我让我的部署任务包含“announce_start”和“announce_finish”。它将尝试在每台服务器上运行所有这些任务。

def deploy(): 
    announce_start()
    # actual deployment code here
    announce_finish()

如果我用@hosts('localhost') 装饰announce_start() 和announce_end()，它会在localhost 上运行它，但仍然是四次。每个主机一个。

当我输入这个时，我终于通过在announce_start/end 上使用装饰器@hosts('localhost') 和fab 命令让它工作：

fab announce_start deploy announce_end

但这似乎有点 hacky。我希望它全部包含在一个部署命令中。有没有办法做到这一点？

Answer 1

你可以使用fabric.api.execute，例如

def announce_start(): 
    # code to connect to irc server and announce deployment begins
    pass

def announce_finish(): 
    # code to connect to irc server and announce deployment finishes
    pass

@hosts(...)
def deploy_machine1():
    pass

@hosts(...)
def deploy_machine2():
    pass

def deploy():
    announce_start()
    execute(deploy_machine1)
    execute(deploy_machine2)
    announce_finish()

然后调用 fab deploy