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