mirror of
https://github.com/thegeeklab/ansible-later.git
synced 2024-07-03 23:50:58 +02:00
270 lines
8.7 KiB
Python
270 lines
8.7 KiB
Python
#!/usr/bin/python
|
|
# -*- coding: utf-8 -*-
|
|
|
|
# Copyright: (c) 2015, Steve Gargan <steve.gargan@gmail.com>
|
|
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
|
|
|
|
from __future__ import absolute_import, division, print_function
|
|
__metaclass__ = type
|
|
|
|
ANSIBLE_METADATA = {'metadata_version': '1.1',
|
|
'status': ['preview'],
|
|
'supported_by': 'community'}
|
|
|
|
DOCUMENTATION = """
|
|
module: consul_session
|
|
short_description: Manipulate consul sessions
|
|
description:
|
|
- Allows the addition, modification and deletion of sessions in a consul
|
|
cluster. These sessions can then be used in conjunction with key value pairs
|
|
to implement distributed locks. In depth documentation for working with
|
|
sessions can be found at http://www.consul.io/docs/internals/sessions.html
|
|
requirements:
|
|
- python >= 2.6
|
|
- python-consul
|
|
- requests
|
|
version_added: "2.0"
|
|
author:
|
|
- Steve Gargan (@sgargan)
|
|
options:
|
|
state:
|
|
description:
|
|
- Whether the session should be present i.e. created if it doesn't
|
|
exist, or absent, removed if present. If created, the ID for the
|
|
session is returned in the output. If absent, the name or ID is
|
|
required to remove the session. Info for a single session, all the
|
|
sessions for a node or all available sessions can be retrieved by
|
|
specifying info, node or list for the state; for node or info, the
|
|
node name or session id is required as parameter.
|
|
choices: [ absent, info, list, node, present ]
|
|
default: present
|
|
name:
|
|
description:
|
|
- The name that should be associated with the session. This is opaque
|
|
to Consul and not required.
|
|
delay:
|
|
description:
|
|
- The optional lock delay that can be attached to the session when it
|
|
is created. Locks for invalidated sessions ar blocked from being
|
|
acquired until this delay has expired. Durations are in seconds.
|
|
default: 15
|
|
node:
|
|
description:
|
|
- The name of the node that with which the session will be associated.
|
|
by default this is the name of the agent.
|
|
datacenter:
|
|
description:
|
|
- The name of the datacenter in which the session exists or should be
|
|
created.
|
|
checks:
|
|
description:
|
|
- A list of checks that will be used to verify the session health. If
|
|
all the checks fail, the session will be invalidated and any locks
|
|
associated with the session will be release and can be acquired once
|
|
the associated lock delay has expired.
|
|
host:
|
|
description:
|
|
- The host of the consul agent defaults to localhost.
|
|
default: localhost
|
|
port:
|
|
description:
|
|
- The port on which the consul agent is running.
|
|
default: 8500
|
|
scheme:
|
|
description:
|
|
- The protocol scheme on which the consul agent is running.
|
|
default: http
|
|
version_added: "2.1"
|
|
validate_certs:
|
|
description:
|
|
- Whether to verify the tls certificate of the consul agent.
|
|
type: bool
|
|
default: True
|
|
version_added: "2.1"
|
|
behavior:
|
|
description:
|
|
- The optional behavior that can be attached to the session when it
|
|
is created. This controls the behavior when a session is invalidated.
|
|
choices: [ delete, release ]
|
|
default: release
|
|
version_added: "2.2"
|
|
"""
|
|
|
|
EXAMPLES = '''
|
|
- name: register basic session with consul
|
|
consul_session:
|
|
name: session1
|
|
|
|
- name: register a session with an existing check
|
|
consul_session:
|
|
name: session_with_check
|
|
checks:
|
|
- existing_check_name
|
|
|
|
- name: register a session with lock_delay
|
|
consul_session:
|
|
name: session_with_delay
|
|
delay: 20s
|
|
|
|
- name: retrieve info about session by id
|
|
consul_session:
|
|
id: session_id
|
|
state: info
|
|
|
|
- name: retrieve active sessions
|
|
consul_session:
|
|
state: list
|
|
'''
|
|
|
|
try:
|
|
import consul
|
|
from requests.exceptions import ConnectionError
|
|
python_consul_installed = True
|
|
except ImportError:
|
|
python_consul_installed = False
|
|
|
|
from ansible.module_utils.basic import AnsibleModule
|
|
|
|
|
|
def execute(module):
|
|
|
|
state = module.params.get('state')
|
|
|
|
if state in ['info', 'list', 'node']:
|
|
lookup_sessions(module)
|
|
elif state == 'present':
|
|
update_session(module)
|
|
else:
|
|
remove_session(module)
|
|
|
|
|
|
def lookup_sessions(module):
|
|
|
|
datacenter = module.params.get('datacenter')
|
|
|
|
state = module.params.get('state')
|
|
consul_client = get_consul_api(module)
|
|
try:
|
|
if state == 'list':
|
|
sessions_list = consul_client.session.list(dc=datacenter)
|
|
# Ditch the index, this can be grabbed from the results
|
|
if sessions_list and sessions_list[1]:
|
|
sessions_list = sessions_list[1]
|
|
module.exit_json(changed=True,
|
|
sessions=sessions_list)
|
|
elif state == 'node':
|
|
node = module.params.get('node')
|
|
if not node:
|
|
module.fail_json(
|
|
msg="node name is required to retrieve sessions for node")
|
|
sessions = consul_client.session.node(node, dc=datacenter)
|
|
module.exit_json(changed=True,
|
|
node=node,
|
|
sessions=sessions)
|
|
elif state == 'info':
|
|
session_id = module.params.get('id')
|
|
if not session_id:
|
|
module.fail_json(
|
|
msg="session_id is required to retrieve indvidual session info")
|
|
|
|
session_by_id = consul_client.session.info(session_id, dc=datacenter)
|
|
module.exit_json(changed=True,
|
|
session_id=session_id,
|
|
sessions=session_by_id)
|
|
|
|
except Exception as e:
|
|
module.fail_json(msg="Could not retrieve session info %s" % e)
|
|
|
|
|
|
def update_session(module):
|
|
|
|
name = module.params.get('name')
|
|
delay = module.params.get('delay')
|
|
checks = module.params.get('checks')
|
|
datacenter = module.params.get('datacenter')
|
|
node = module.params.get('node')
|
|
behavior = module.params.get('behavior')
|
|
|
|
consul_client = get_consul_api(module)
|
|
|
|
try:
|
|
session = consul_client.session.create(
|
|
name=name,
|
|
behavior=behavior,
|
|
node=node,
|
|
lock_delay=delay,
|
|
dc=datacenter,
|
|
checks=checks
|
|
)
|
|
module.exit_json(changed=True,
|
|
session_id=session,
|
|
name=name,
|
|
behavior=behavior,
|
|
delay=delay,
|
|
checks=checks,
|
|
node=node)
|
|
except Exception as e:
|
|
module.fail_json(msg="Could not create/update session %s" % e)
|
|
|
|
|
|
def remove_session(module):
|
|
session_id = module.params.get('id')
|
|
if not session_id:
|
|
module.fail_json(msg="""A session id must be supplied in order to
|
|
remove a session.""")
|
|
|
|
consul_client = get_consul_api(module)
|
|
|
|
try:
|
|
consul_client.session.destroy(session_id)
|
|
|
|
module.exit_json(changed=True,
|
|
session_id=session_id)
|
|
except Exception as e:
|
|
module.fail_json(msg="Could not remove session with id '%s' %s" % (
|
|
session_id, e))
|
|
|
|
|
|
def get_consul_api(module):
|
|
return consul.Consul(host=module.params.get('host'),
|
|
port=module.params.get('port'))
|
|
|
|
|
|
def test_dependencies(module):
|
|
if not python_consul_installed:
|
|
module.fail_json(msg="python-consul required for this module. "
|
|
"see https://python-consul.readthedocs.io/en/latest/#installation")
|
|
|
|
|
|
def main():
|
|
argument_spec = dict(
|
|
checks=dict(type='list'),
|
|
delay=dict(type='int', default='15'),
|
|
behavior=dict(type='str', default='release', choices=['release', 'delete']),
|
|
host=dict(type='str', default='localhost'),
|
|
port=dict(type='int', default=8500),
|
|
scheme=dict(type='str', default='http'),
|
|
validate_certs=dict(type='bool', default=True),
|
|
id=dict(type='str'),
|
|
name=dict(type='str'),
|
|
node=dict(type='str'),
|
|
state=dict(type='str', default='present', choices=['absent', 'info', 'list', 'node', 'present']),
|
|
datacenter=dict(type='str'),
|
|
)
|
|
|
|
module = AnsibleModule(argument_spec, supports_check_mode=False)
|
|
|
|
test_dependencies(module)
|
|
|
|
try:
|
|
execute(module)
|
|
except ConnectionError as e:
|
|
module.fail_json(msg='Could not connect to consul agent at %s:%s, error was %s' % (
|
|
module.params.get('host'), module.params.get('port'), e))
|
|
except Exception as e:
|
|
module.fail_json(msg=str(e))
|
|
|
|
|
|
if __name__ == '__main__':
|
|
main()
|