123 lines
4.6 KiB
Python
123 lines
4.6 KiB
Python
# (c) 2012, Michael DeHaan <michael.dehaan@gmail.com>
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#
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# This file is part of Ansible
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#
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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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#
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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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#
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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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import os
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import subprocess
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import ansible.constants as C
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from ansible.inventory.host import Host
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from ansible.inventory.group import Group
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from ansible import utils
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from ansible import errors
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import sys
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class InventoryScript(object):
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''' Host inventory parser for ansible using external inventory scripts. '''
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def __init__(self, filename=C.DEFAULT_HOST_LIST):
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# Support inventory scripts that are not prefixed with some
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# path information but happen to be in the current working
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# directory when '.' is not in PATH.
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self.filename = os.path.abspath(filename)
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cmd = [ self.filename, "--list" ]
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try:
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sp = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
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except OSError, e:
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raise errors.AnsibleError("problem running %s (%s)" % (' '.join(cmd), e))
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(stdout, stderr) = sp.communicate()
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self.data = stdout
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# see comment about _meta below
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self.host_vars_from_top = None
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self.groups = self._parse(stderr)
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def _parse(self, err):
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all_hosts = {}
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self.raw = utils.parse_json(self.data)
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all = Group('all')
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groups = dict(all=all)
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group = None
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if 'failed' in self.raw:
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sys.stderr.write(err + "\n")
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raise errors.AnsibleError("failed to parse executable inventory script results: %s" % self.raw)
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for (group_name, data) in self.raw.items():
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# in Ansible 1.3 and later, a "_meta" subelement may contain
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# a variable "hostvars" which contains a hash for each host
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# if this "hostvars" exists at all then do not call --host for each
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# host. This is for efficiency and scripts should still return data
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# if called with --host for backwards compat with 1.2 and earlier.
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if group_name == '_meta':
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if 'hostvars' in data:
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self.host_vars_from_top = data['hostvars']
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continue
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group = groups[group_name] = Group(group_name)
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host = None
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if not isinstance(data, dict):
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data = {'hosts': data}
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elif not any(k in data for k in ('hosts','vars')):
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data = {'hosts': [group_name], 'vars': data}
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if 'hosts' in data:
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for hostname in data['hosts']:
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if not hostname in all_hosts:
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all_hosts[hostname] = Host(hostname)
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host = all_hosts[hostname]
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group.add_host(host)
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if 'vars' in data:
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for k, v in data['vars'].iteritems():
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if group.name == all.name:
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all.set_variable(k, v)
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else:
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group.set_variable(k, v)
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if group.name != all.name:
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all.add_child_group(group)
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# Separate loop to ensure all groups are defined
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for (group_name, data) in self.raw.items():
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if group_name == '_meta':
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continue
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if isinstance(data, dict) and 'children' in data:
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for child_name in data['children']:
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if child_name in groups:
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groups[group_name].add_child_group(groups[child_name])
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return groups
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def get_host_variables(self, host):
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""" Runs <script> --host <hostname> to determine additional host variables """
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if self.host_vars_from_top is not None:
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got = self.host_vars_from_top.get(host.name, {})
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return got
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cmd = [self.filename, "--host", host.name]
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try:
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sp = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
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except OSError, e:
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raise errors.AnsibleError("problem running %s (%s)" % (' '.join(cmd), e))
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(out, err) = sp.communicate()
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return utils.parse_json(out)
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