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Add port and user kwargs for ssh.cache_host_key()

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deprecate the `for_user` kwarg.  this also will now try a basic command over
ssh before bothering with an update/cache for the host key
This commit is contained in:
Lance Edgar 2020-10-08 13:15:06 -05:00
parent 97ed8eeff0
commit caf94ac65a
1 changed files with 26 additions and 5 deletions
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31
rattail_fabric2/ssh.py
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@ -2,7 +2,7 @@
################################################################################ ################################################################################
# #
# Rattail -- Retail Software Framework # Rattail -- Retail Software Framework
# Copyright © 2010-2019 Lance Edgar # Copyright © 2010-2020 Lance Edgar
# #
# This file is part of Rattail. # This file is part of Rattail.
# #
@ -25,13 +25,34 @@ Fabric Library for SSH
""" """
def cache_host_key(c, host, for_user='root'): def cache_host_key(c, host, port=None, user=None, **kwargs):
""" """
Cache the SSH host key for the given host, for the given user. Cache the SSH host key for the given host, for the given user.
""" """
cmd = 'ssh -o StrictHostKeyChecking=no {} echo'.format(host) if 'for_user' in kwargs:
user = None if for_user == 'root' else for_user pass # TODO: deprecation warning
c.sudo(cmd, user=user, warn=True)
if not user and kwargs.get('for_user'):
user = kwargs['for_user']
port = '-p {}'.format(port) if port else ''
# first try to run basic command over ssh; if it works then we don't
# actually need to update/cache the host key
cmd = 'ssh {} {} whoami'.format(port, host)
if user:
result = c.sudo(cmd, warn=True, user=None if user == 'root' else user)
else:
result = c.run(cmd, warn=True)
if result.failed:
# basic command failed, which presumably means we *do* need to cache
# the host key, so try that now
cmd = 'ssh -o StrictHostKeyChecking=no {} {} echo'.format(port, host)
if user:
c.sudo(cmd, user=None if user == 'root' else user)
else:
c.run(cmd)
def restart(c): def restart(c):