160 lines
4.8 KiB
Python
160 lines
4.8 KiB
Python
# (c) 2013, Jan-Piet Mens <jpmens(at)gmail.com>
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# (m) 2017, Juan Manuel Parrilla <jparrill@redhat.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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from __future__ import (absolute_import, division, print_function)
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__metaclass__ = type
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DOCUMENTATION = '''
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author:
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- Jan-Piet Mens (@jpmens)
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lookup: etcd
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version_added: "2.1"
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short_description: get info from etcd server
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description:
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- Retrieves data from an etcd server
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options:
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_terms:
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description:
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- the list of keys to lookup on the etcd server
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type: list
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elements: string
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required: True
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_etcd_url:
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description:
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- Environment variable with the url for the etcd server
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default: 'http://127.0.0.1:4001'
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env:
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- name: ANSIBLE_ETCD_URL
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yaml:
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- key: etcd.url
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_etcd_version:
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description:
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- Environment variable with the etcd protocol version
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default: 'v1'
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env:
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- name: ANSIBLE_ETCD_VERSION
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yaml:
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- key: etcd.version
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'''
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EXAMPLES = '''
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- name: "a value from a locally running etcd"
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debug: msg={{ lookup('etcd', 'foo/bar') }}
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- name: "a values from a folder on a locally running etcd"
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debug: msg={{ lookup('etcd', 'foo') }}
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'''
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RETURN = '''
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_raw:
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description:
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- list of values associated with input keys
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type: list
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elements: strings
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'''
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import os
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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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from ansible.plugins.lookup import LookupBase
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from ansible.module_utils.urls import open_url
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# this can be made configurable, not should not use ansible.cfg
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ANSIBLE_ETCD_URL = 'http://127.0.0.1:4001'
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if os.getenv('ANSIBLE_ETCD_URL') is not None:
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ANSIBLE_ETCD_URL = os.environ['ANSIBLE_ETCD_URL']
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ANSIBLE_ETCD_VERSION = 'v1'
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if os.getenv('ANSIBLE_ETCD_VERSION') is not None:
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ANSIBLE_ETCD_VERSION = os.environ['ANSIBLE_ETCD_VERSION']
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class Etcd:
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def __init__(self, url=ANSIBLE_ETCD_URL, version=ANSIBLE_ETCD_VERSION,
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validate_certs=True):
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self.url = url
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self.version = version
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self.baseurl = '%s/%s/keys' % (self.url, self.version)
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self.validate_certs = validate_certs
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def _parse_node(self, node):
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# This function will receive all etcd tree,
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# if the level requested has any node, the recursion starts
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# create a list in the dir variable and it is passed to the
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# recursive function, and so on, if we get a variable,
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# the function will create a key-value at this level and
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# undoing the loop.
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path = {}
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if node.get('dir', False):
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for n in node.get('nodes', []):
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path[n['key'].split('/')[-1]] = self._parse_node(n)
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else:
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path = node['value']
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return path
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def get(self, key):
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url = "%s/%s?recursive=true" % (self.baseurl, key)
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data = None
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value = {}
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try:
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r = open_url(url, validate_certs=self.validate_certs)
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data = r.read()
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except:
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return None
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try:
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# I will not support Version 1 of etcd for folder parsing
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item = json.loads(data)
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if self.version == 'v1':
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# When ETCD are working with just v1
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if 'value' in item:
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value = item['value']
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else:
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if 'node' in item:
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# When a usual result from ETCD
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value = self._parse_node(item['node'])
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if 'errorCode' in item:
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# Here return an error when an unknown entry responds
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value = "ENOENT"
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except:
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raise
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return value
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class LookupModule(LookupBase):
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def run(self, terms, variables, **kwargs):
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validate_certs = kwargs.get('validate_certs', True)
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etcd = Etcd(validate_certs=validate_certs)
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ret = []
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for term in terms:
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key = term.split()[0]
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value = etcd.get(key)
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ret.append(value)
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return ret
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