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Add ssh.set_config() convenience function

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This commit is contained in:
Lance Edgar 2019-08-10 02:41:26 -05:00
parent 5a7a122e2d
commit 3771688660
1 changed files with 23 additions and 20 deletions
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43
rattail_fabric2/ssh.py
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@ -47,24 +47,27 @@ def configure(c, allow_root=False):
"""
Configure the OpenSSH service
"""
path = '/etc/ssh/sshd_config'
# PermitRootLogin no (or without-password)
# TODO: this probably needs the same treatment as PasswordAuthentication got
if c.run("grep '^PermitRootLogin ' {}".format(path), warn=True).failed:
c.sudo('sed -i.bak -e "s/^#PermitRootLogin .*/PermitRootLogin {}/" {}'.format(
'without-password' if allow_root else 'no', path))
else:
c.sudo('sed -i.bak -e "s/^PermitRootLogin .*/PermitRootLogin {}/" {}'.format(
'without-password' if allow_root else 'no', path))
# PasswordAuthentication no
if c.run("grep '^PasswordAuthentication ' {}".format(path), warn=True).failed:
if c.run("grep '^#PasswordAuthentication ' {}".format(path), warn=True).failed:
c.sudo("""bash -c 'echo "PasswordAuthentication no" >> /etc/ssh/sshd_config'""")
else:
c.sudo("sed -i.bak -e 's/^#PasswordAuthentication .*/PasswordAuthentication no/' {}".format(path))
else:
c.sudo("sed -i.bak -e 's/^PasswordAuthentication .*/PasswordAuthentication no/' {}".format(path))
set_config(c, 'PermitRootLogin', 'without-password' if allow_root else 'no')
set_config(c, 'PasswordAuthentication', 'no')
restart(c)
def set_config(c, setting, value, path='/etc/ssh/sshd_config'):
"""
Configure the given SSH setting with the given value.
"""
# first check if the setting is already defined
if c.run("grep '^{} ' {}".format(setting, path), warn=True).failed:
# nope, not yet defined. maybe we can uncomment a definition?
# (note, this looks only for '#Foo' and not '# Foo' for instance)
if c.run("grep '^#{} ' {}".format(setting, path), warn=True).failed:
# nope, must tack on a new definition at end of file
c.sudo("""bash -c 'echo "{} {}" >> {}'""".format(setting, value, path))
else: # yep, uncomment existing definition, but also overwrite
c.sudo("sed -i .bak -e 's/^#{0} .*/{0} {1}/' {2}".format(setting, value, path))
else: # setting is defined, so overwrite it
c.sudo("sed -i.bak -e 's/^{0} .*/{0} {1}/' {2}".format(setting, value, path))