[Fab-user] skip "No route to host"

[address@hidden]

Hi all,

how can I avoid or skip "Fatal error: Low level socket error connecting to host 
xyz: No route to host" when one host is down / not reachable ?


e.g.

from fabric.api import env,sudo,roles,run,task,cd
 
env.roledefs = {
    'lamp':['www','www-b','www-f'],
    }
 
def updatenupgrade():
    if run("lsb_release -i| egrep -i '(Debian|Ubuntu)'"):
        sudo('aptitude update && aptitude upgrade')
    else:
        sudo('yum update')





If host 'www-b' is down 'www-f' unfortunately never gets treated. 

(--warn-only does not help)


thanks, 


Jan