| # (c) 2012-2014, Michael DeHaan <[email protected]>## This file is part of Ansible## Ansible 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 3 of the License, or# (at your option) any later version.## Ansible 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 Ansible. If not, see <http://www.gnu.org/licenses/>.#############################################import osimport subprocessimport ansible.constants as Cfrom ansible.inventory.host import Hostfrom ansible.inventory.group import Groupfrom ansible import utilsfrom ansible import errorsimport sysclass InventoryScript(object): ''' Host inventory parser for ansible using external inventory scripts. ''' def __init__(self, filename=C.DEFAULT_HOST_LIST): # Support inventory scripts that are not prefixed with some # path information but happen to be in the current working # directory when '.' is not in PATH. self.filename = os.path.abspath(filename) cmd = [ self.filename, "--list" ] try: sp = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE) except OSError, e: raise errors.AnsibleError("problem running %s (%s)" % (' '.join(cmd), e)) (stdout, stderr) = sp.communicate() self.data = stdout # see comment about _meta below self.host_vars_from_top = None self.groups = self._parse(stderr) def _parse(self, err): all_hosts = {} # BUG: CWE-20 Improper Input Validation # self.raw = utils.parse_json(self.data) # FIXED: self.raw = utils.parse_json(self.data, from_remote=True) all = Group('all') groups = dict(all=all) group = None if 'failed' in self.raw: sys.stderr.write(err + "\n") raise errors.AnsibleError("failed to parse executable inventory script results: %s" % self.raw) for (group_name, data) in self.raw.items(): # in Ansible 1.3 and later, a "_meta" subelement may contain # a variable "hostvars" which contains a hash for each host # if this "hostvars" exists at all then do not call --host for each # host. This is for efficiency and scripts should still return data # if called with --host for backwards compat with 1.2 and earlier. if group_name == '_meta': if 'hostvars' in data: self.host_vars_from_top = data['hostvars'] continue if group_name != all.name: group = groups[group_name] = Group(group_name) else: group = all host = None if not isinstance(data, dict): data = {'hosts': data} elif not any(k in data for k in ('hosts','vars')): data = {'hosts': [group_name], 'vars': data} if 'hosts' in data: for hostname in data['hosts']: if not hostname in all_hosts: all_hosts[hostname] = Host(hostname) host = all_hosts[hostname] group.add_host(host) if 'vars' in data: for k, v in data['vars'].iteritems(): if group.name == all.name: all.set_variable(k, v) else: group.set_variable(k, v) if group.name != all.name: all.add_child_group(group) # Separate loop to ensure all groups are defined for (group_name, data) in self.raw.items(): if group_name == '_meta': continue if isinstance(data, dict) and 'children' in data: for child_name in data['children']: if child_name in groups: groups[group_name].add_child_group(groups[child_name]) return groups def get_host_variables(self, host): """ Runs <script> --host <hostname> to determine additional host variables """ if self.host_vars_from_top is not None: got = self.host_vars_from_top.get(host.name, {}) return got cmd = [self.filename, "--host", host.name] try: sp = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE) except OSError, e: raise errors.AnsibleError("problem running %s (%s)" % (' '.join(cmd), e)) (out, err) = sp.communicate() return utils.parse_json(out) |