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# -*- coding: utf-8 -*-
# Copyright (c) 2013, Jan-Piet Mens <jpmens(at)gmail.com>
# (m) 2016, Mihai Moldovanu <mihaim@tfm.ro>
# (m) 2017, Juan Manuel Parrilla <jparrill@redhat.com>
# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
# SPDX-License-Identifier: GPL-3.0-or-later
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type
DOCUMENTATION = '''
author:
- Jan-Piet Mens (@jpmens)
name: etcd
short_description: get info from an etcd server
description:
- Retrieves data from an etcd server
options:
_terms:
description:
- the list of keys to lookup on the etcd server
type: list
elements: string
required: true
url:
description:
- Environment variable with the url for the etcd server
default: 'http://127.0.0.1:4001'
env:
- name: ANSIBLE_ETCD_URL
version:
description:
- Environment variable with the etcd protocol version
default: 'v1'
env:
- name: ANSIBLE_ETCD_VERSION
validate_certs:
description:
- toggle checking that the ssl certificates are valid, you normally only want to turn this off with self-signed certs.
default: true
type: boolean
'''
EXAMPLES = '''
- name: "a value from a locally running etcd"
ansible.builtin.debug:
msg: "{{ lookup('community.general.etcd', 'foo/bar') }}"
- name: "values from multiple folders on a locally running etcd"
ansible.builtin.debug:
msg: "{{ lookup('community.general.etcd', 'foo', 'bar', 'baz') }}"
- name: "since Ansible 2.5 you can set server options inline"
ansible.builtin.debug:
msg: "{{ lookup('community.general.etcd', 'foo', version='v2', url='http://192.168.0.27:4001') }}"
'''
RETURN = '''
_raw:
description:
- list of values associated with input keys
type: list
elements: string
'''
import 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
#
# Made module configurable from playbooks:
# If etcd v2 running on host 192.168.1.21 on port 2379
# we can use the following in a playbook to retrieve /tfm/network/config key
#
# - ansible.builtin.debug: msg={{lookup('etcd','/tfm/network/config', url='http://192.168.1.21:2379' , version='v2')}}
#
# Example Output:
#
# TASK [debug] *******************************************************************
# ok: [localhost] => {
# "msg": {
# "Backend": {
# "Type": "vxlan"
# },
# "Network": "172.30.0.0/16",
# "SubnetLen": 24
# }
# }
#
#
#
#
class Etcd:
def __init__(self, url, version, validate_certs):
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 Exception:
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 Exception:
raise
return value
class LookupModule(LookupBase):
def run(self, terms, variables, **kwargs):
self.set_options(var_options=variables, direct=kwargs)
validate_certs = self.get_option('validate_certs')
url = self.get_option('url')
version = self.get_option('version')
etcd = Etcd(url=url, version=version, 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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