Python Fabric - No hosts found. Please specify (single) host string for connection:


Python Fabric - No hosts found. Please specify (single) host string for connection:



How do I get No hosts found. Please specify (single) host string for connection: ?



How to a resolve with fabric?


def bootstrap():
host = 'ec2-54-xxx.xxx.xxx.compute-1.amazonaws.com'
env.hosts = [host]
env.user = "ubuntu"
env.key_filename = "/home/ubuntu/omg.pem"

> command run
>> fab bootstrap
> No hosts found. Please specify (single) host string for connection:




3 Answers
3



Instead of setting hosts inside your task, do it before it gets called with a decorator:


from fabric.api import hosts, env

@hosts(['ec2-54-xxx.xxx.xxx.compute-1.amazonaws.com'])
def bootstrap():
env.user = "ubuntu"
env.key_filename = "/home/ubuntu/omg.pem"



For more information on this, check out Defining host lists - there are a lot of different ways to do it depending on what you need.





Thanks for this solution. I was having an issue where i need to define different type of hosts to a different function. With this solution i was able to fix my problem.
– fear_matrix
Jan 9 '17 at 10:17



Also you can use env.host_string instead of env.hosts:


def bootstrap():
env.host_string # 'ec2-54-xxx.xxx.xxx.compute-1.amazonaws.com'
env.user = "ubuntu"
env.key_filename = "/home/ubuntu/omg.pem"





Thanks!, I also needed env.disable_known_hosts = True
– Montaro
Jan 5 '17 at 12:36


env.disable_known_hosts = True



Alternatevly you can set env settings in outside your functions


from fabric.api import env, run

host = 'ec2-54-xxx.xxx.xxx.compute-1.amazonaws.com'
env.hosts = [host]
env.user = "ubuntu"
env.key_filename = "/home/ubuntu/omg.pem"

def test():
run('ls -la')






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