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Cobler module for Chef
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| """ | |
| (C) 2010 Pragmatic Source | |
| Farzad FARID <ffarid@pragmatic-source.com> | |
| register_chef.py: Register the server being installed on the Chef server | |
| We assume that the 'knife' is installed locally on the Cobbler server. | |
| Check https://fedorahosted.org/cobbler/wiki/CobblerTriggers for | |
| documentation on Cobbler's triggers and API. | |
| This program is free software; you can redistribute it and/or modify | |
| it under the terms of the GNU General Public License as published by | |
| the Free Software Foundation; either version 2 of the License, or | |
| (at your option) any later version. | |
| This program is distributed in the hope that it will be useful, | |
| but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| GNU General Public License for more details. | |
| You should have received a copy of the GNU General Public License | |
| along with this program; if not, write to the Free Software | |
| Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
| 02110-1301 USA | |
| """ | |
| import utils | |
| import sys | |
| import os | |
| # Configuration settings | |
| # ---------------------- | |
| # * home: | |
| # The HOME environment variable is undefined in the cobblerd process, we | |
| # have to set it here for 'knife' to be able to find its configuration | |
| # file, '~/.chef/knife.rb'. | |
| # * knife_config_path: | |
| # If the 'knife.rb' configuration file is in an unusual place, define the | |
| # full path here. | |
| # * chef_roles: | |
| # List of compulsory Chef Roles to prepend to the management classes extracted | |
| # from the Cobbler configuration. | |
| # Only the 'home' setting is compulsory. | |
| CHEF_CONFIG = { | |
| #'home': '/root', | |
| 'knife_config_path': '/root/.chef/knife.rb', | |
| 'chef_roles': [ 'Linux' ] | |
| } | |
| def register(): | |
| # this pure python trigger acts as if it were a legacy shell-trigger, but is much faster. | |
| # the return of this method indicates the trigger type | |
| return "/var/lib/cobbler/triggers/install/post/*" | |
| def run(api, args, logger): | |
| objtype = args[0] # "system" or "profile" | |
| name = args[1] # name of system or profile | |
| boot_ip = args[2] # ip or "?" | |
| # Handle only systems, not profiles | |
| if objtype != "system": | |
| return 0 | |
| # Lookup the node in Cobbler's database | |
| node = api.find_system(name) | |
| # Find its fully qualified hostname and the management classes, to which we | |
| # add "Linux" unconditionnaly. We directly map cobbler's Management Classes to | |
| # Chef Roles' names. | |
| hostname = node.hostname | |
| roles = node.mgmt_classes | |
| roles = CHEF_CONFIG.get('chef_roles', []) + roles | |
| logger.info("Registering %s (%s) in Chef" % (name, hostname)) | |
| # Create the node in Chef, deleting it first if necessary, and | |
| # add roles one by one. | |
| # Note: "knife node delete" does not destroy the node's RSA key. We don't | |
| # need to delete it as it will be recreated by chef-client on the first | |
| # run. | |
| if CHEF_CONFIG.has_key('home'): | |
| os.environ['HOME'] = CHEF_CONFIG['home'] | |
| knife_opts = '' | |
| if CHEF_CONFIG.has_key('knife_config_path'): | |
| knife_opts = '--config ' + CHEF_CONFIG['knife_config_path'] | |
| # Delete the node | |
| # Ignore stderr too, as usually this command should fail. | |
| rc = utils.subprocess_call(logger, | |
| "knife node delete %(hostname)s --yes %(knife_opts)s >/dev/null 2>&1" % { 'hostname': hostname, 'knife_opts': knife_opts }, | |
| shell=True) | |
| if rc != 0: | |
| logger.warning("Failed to delete node %s in Chef" % hostname) | |
| # Add the node | |
| rc = utils.subprocess_call(logger, "knife node create %(hostname)s --no-editor %(knife_opts)s >/dev/null" % | |
| { 'hostname': hostname, 'knife_opts': knife_opts}, | |
| shell=True) | |
| if rc != 0: | |
| logger.error("Failed to create node %s in Chef" % hostname) | |
| # Add roles to the node | |
| for role in roles: | |
| rc = utils.subprocess_call(logger, | |
| "knife node run_list add %(hostname)s \"role[%(role)s]\" %(knife_opts)s >/dev/null" % { 'hostname': hostname, 'knife_opts': knife_opts, 'role': role }, | |
| shell=True) | |
| if rc != 0: | |
| logger.error("Failed to add role %(role)s to node %(hostname)s in Chef" % { 'hostname': hostname, 'role': role }) | |
| return 0 |
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