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ansible/library/notification/mqtt

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#!/usr/bin/python
# -*- coding: utf-8 -*-
# (c) 2013, 2014, Jan-Piet Mens <jpmens () gmail.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 = '''
---
module: mqtt
short_description: Publish a message on an MQTT topic for the IoT
version_added: "1.2"
description:
- Publish a message on an MQTT topic.
options:
server:
description:
- MQTT broker address/name
required: false
default: localhost
port:
description:
- MQTT broker port number
required: false
default: 1883
username:
description:
- Username to authenticate against the broker.
required: false
password:
description:
- Password for C(username) to authenticate against the broker.
required: false
client_id:
description:
- MQTT client identifier
required: false
default: hostname + pid
topic:
description:
- MQTT topic name
required: true
default: null
payload:
description:
- Payload. The special string C("None") may be used to send a NULL
(i.e. empty) payload which is useful to simply notify with the I(topic)
or to clear previously retained messages.
required: true
default: null
qos:
description:
- QoS (Quality of Service)
required: false
default: 0
choices: [ "0", "1", "2" ]
retain:
description:
- Setting this flag causes the broker to retain (i.e. keep) the message so that
applications that subsequently subscribe to the topic can received the last
retained message immediately.
required: false
default: False
# informational: requirements for nodes
requirements: [ mosquitto ]
notes:
- This module requires a connection to an MQTT broker such as Mosquitto
U(http://mosquitto.org) and the I(Paho) C(mqtt) Python client (U(https://pypi.python.org/pypi/paho-mqtt)).
author: Jan-Piet Mens
'''
EXAMPLES = '''
- local_action: mqtt
topic=service/ansible/{{ ansible_hostname }}
payload="Hello at {{ ansible_date_time.iso8601 }}"
qos=0
retain=false
client_id=ans001
'''
# ===========================================
# MQTT module support methods.
#
HAS_PAHOMQTT = True
try:
import socket
import paho.mqtt.publish as mqtt
except ImportError:
HAS_PAHOMQTT = False
# ===========================================
# Main
#
def main():
module = AnsibleModule(
argument_spec=dict(
server = dict(default = 'localhost'),
port = dict(default = 1883),
topic = dict(required = True),
payload = dict(required = True),
client_id = dict(default = None),
qos = dict(default="0", choices=["0", "1", "2"]),
retain = dict(default=False, type='bool'),
username = dict(default = None),
password = dict(default = None),
),
supports_check_mode=True
)
if not HAS_PAHOMQTT:
module.fail_json(msg="Paho MQTT is not installed")
server = module.params.get("server", 'localhost')
port = module.params.get("port", 1883)
topic = module.params.get("topic")
payload = module.params.get("payload")
client_id = module.params.get("client_id", '')
qos = int(module.params.get("qos", 0))
retain = module.params.get("retain")
username = module.params.get("username", None)
password = module.params.get("password", None)
if client_id is None:
client_id = "%s_%s" % (socket.getfqdn(), os.getpid())
if payload and payload == 'None':
payload = None
auth=None
if username is not None:
auth = { 'username' : username, 'password' : password }
try:
rc = mqtt.single(topic, payload,
qos=qos,
retain=retain,
client_id=client_id,
hostname=server,
port=port,
auth=auth)
except Exception, e:
module.fail_json(msg="unable to publish to MQTT broker %s" % (e))
module.exit_json(changed=False, topic=topic)
# import module snippets
from ansible.module_utils.basic import *
main()