Merge pull request #433 from bradobro/authorized_key
Renamed module, fixed idempotency, removed debug param.
This commit is contained in:
Michael DeHaan
commit
960e7c331c
1 changed files with 188 additions and 0 deletions
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library/authorized_key
Executable file
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library/authorized_key
Executable file
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#!/usr/bin/env python
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"""Ansible module to add authorized_keys for ssh logins.
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(c) 2012, Brad Olson <brado@movedbylight.com>
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Results: Makes sure the public key line is present or absent in the user's .ssh/authorized_keys.
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Arguments
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=========
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user = username
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key = line to add to authorized_keys for user
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state = absent|present (default: present)
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Command Line Example
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====================
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ansible somehost -m authorized_key -a user=charlie key="ssh-dss AAAABUfOL+8BTwaRYr/rycsBF1D8e5pTxEsXHQs4iq+mZdyWqlW++L6pMiam1A8yweP+rKtgjK2httVS6GigVsuWWfOd7/sdWippefq74nppVUELHPKkaIOjJNN1zUHFoL/YMwAAAEBALnAsQN10TNGsRDe5arBsW8cTOjqLyYBcIqgPYTZW8zENErFxt7ij3fW3Jh/sCpnmy8rkS7FyK8ULX0PEy/2yDx8/5rXgMIICbRH/XaBy9Ud5bRBFVkEDu/r+rXP33wFPHjWjwvHAtfci1NRBAudQI/98DbcGQw5HmE89CjgZRo5ktkC5yu/8agEPocVjdHyZr7PaHfxZGUDGKtGRL2QzRYukCmWo1cZbMBHcI5FzImvTHS9/8B3SATjXMPgbfBuEeBwuBK5EjL+CtHY5bWs9kmYjmeo0KfUMH8hY4MAXDoKhQ7DhBPIrcjS5jPtoGxIREZjba67r6/P2XKXaCZH6Fc= charlie@somemail.org 2011-01-17"
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Playbook Example
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================
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---
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# include like this:
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# - include: tasks/logins.yaml users=charlie,sue
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- name: create user charlie
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action: user name=charlie shell=/bin/bash createhome=yes groups=www-data
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only_if: "'charlie' in '$users'"
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- name: add public key for charlie
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action: authorized_key user=charlie key="ssh-dss AAAABUfOL+8BTwaRYr/rycsBF1D8e5pTxEsXHQs4iq+mZdyWqlW++L6pMiam1A8yweP+rKtgjK2httVS6GigVsuWWfOd7/sdWippefq74nppVUELHPKkaIOjJNN1zUHFoL/YMwAAAEBALnAsQN10TNGsRDe5arBsW8cTOjqLyYBcIqgPYTZW8zENErFxt7ij3fW3Jh/sCpnmy8rkS7FyK8ULX0PEy/2yDx8/5rXgMIICbRH/XaBy9Ud5bRBFVkEDu/r+rXP33wFPHjWjwvHAtfci1NRBAudQI/98DbcGQw5HmE89CjgZRo5ktkC5yu/8agEPocVjdHyZr7PaHfxZGUDGKtGRL2QzRYukCmWo1cZbMBHcI5FzImvTHS9/8B3SATjXMPgbfBuEeBwuBK5EjL+CtHY5bWs9kmYjmeo0KfUMH8hY4MAXDoKhQ7DhBPIrcjS5jPtoGxIREZjba67r6/P2XKXaCZH6Fc= charlie@somemail.org 2011-01-17"
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only_if: "'charlie' in '$users'"
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This file is part of Ansible
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Ansible is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Ansible is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Ansible. If not, see <http://www.gnu.org/licenses/>.
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"""
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try:
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import json
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except ImportError:
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import simplejson as json
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import sys, os, shlex, pwd, syslog
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from os.path import expanduser, exists, isfile, join
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params = {}
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msg=""
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def exit_json(rc=0, **kwargs):
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if 'name' in kwargs:
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add_user_info(kwargs)
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print json.dumps(kwargs)
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sys.exit(rc)
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def fail_json(**kwargs):
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kwargs['failed'] = True
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exit_json(rc=1, **kwargs)
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def get_params():
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"""Startup tasks and read params.
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:return: parameters as dictionary.
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"""
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global msg
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msg = "reading params"
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with file(sys.argv[1]) as f: #read the args file
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args = f.read()
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msg = "writing syslog."
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syslog.openlog('ansible-%s' % os.path.basename(__file__))
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syslog.syslog(syslog.LOG_NOTICE, 'Invoked with %s' % args)
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msg = "parsing params"
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params = dict( # make a dictionary of...
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[ arg.split("=", 1) # assignment pairs
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for arg in shlex.split(args) # using shell lexing
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if "=" in arg # ignoring tokens without assignment
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])
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return params
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def keyfile(user, create=False):
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"""Calculate name of authorized keys file, optionally creating the
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directories and file, properly setting permissions.
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:param str user: name of user in passwd file
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:param bool create: make directories and authorized key file if True
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:return: full path string to authorized_keys for user
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"""
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global msg
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msg = "Reading system user entry."
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user_entry = pwd.getpwnam(user)
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homedir = user_entry.pw_dir
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sshdir = join(homedir, ".ssh")
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keysfile = join(sshdir, "authorized_keys")
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if not create: return keysfile
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#create directories and files for authorized keys
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msg = "Reading user and group info."
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uid = user_entry.pw_uid
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gid = user_entry.pw_gid
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msg = "Making ~/.ssh."
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if not exists(sshdir): os.mkdir(sshdir, 0700)
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os.chown(sshdir, uid, gid)
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os.chmod(sshdir, 0700)
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msg = "Touching authorized keys file."
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if not exists( keysfile):
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with file(keysfile, "w") as f:
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f.write("#Authorized Keys File created by Ansible.")
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os.chown(keysfile, uid, gid)
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os.chmod(keysfile, 0600)
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return keysfile
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def readkeys( filename):
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global msg
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msg = "Reading authorized_keys."
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if not isfile(filename): return []
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with file(filename) as f:
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keys = [line.rstrip() for line in f.readlines()]
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return keys
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def writekeys( filename, keys):
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global msg
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msg = "Writing authorized_keys."
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with file(filename,"w") as f:
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f.writelines( (key + "\n" for key in keys) )
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def enforce_state( params):
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"""Add or remove key.
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:return: True=changed, False=unchanged
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"""
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global msg
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#== scrub params
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msg = "Invalid or missing param: user."
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user = params["user"]
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msg = "Invalid or missing param: key."
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key = params["key"]
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state = params.get("state", "present")
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#== check current state
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params["keyfile"] = keyfile(user)
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keys = readkeys( params["keyfile"])
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present = key in keys
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#== handle idempotent state=present
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if state=="present":
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if present: return False #nothing to do
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keys.append(key)
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writekeys(keyfile(user,create=True), keys)
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elif state=="absent":
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if not present: return False #nothing to do
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keys.remove(key)
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writekeys(keyfile(user,create=True), keys)
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else:
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msg = "Invalid param: state."
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raise StandardError(msg)
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return True
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#===== MAIN SCRIPT ===================================================
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try:
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params = get_params()
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changed = enforce_state( params)
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msg = ""
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except:
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msg = "Error %s" % msg
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# Don't do sys.exit() within try...except
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if msg:
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fail_json(msg=msg)
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else:
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exit_json( user=params["user"], changed=changed)
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