Merge branch 'redis-config' of https://github.com/slok/ansible into slok-redis-config
This commit is contained in:
James Cammarata
commit
60e7da2031
1 changed files with 281 additions and 0 deletions
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database/redis
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database/redis
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#!/usr/bin/python
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# -*- coding: utf-8 -*-
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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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DOCUMENTATION = '''
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---
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module: redis
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short_description: Various redis commands, slave and flush
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description:
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- Unified utility to interact with redis instances.
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'slave' Sets a redis instance in slave or master mode.
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'flush' Flushes all the instance or ans specified db.
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version_added: "1.3"
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options:
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command:
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description:
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- The selected redis command
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required: true
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default: null
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choices: [ "slave", "flush" ]
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login_password:
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description:
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- The password used to authenticate with (usually not used)
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required: false
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default: null
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login_host:
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description:
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- The host running the database
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required: false
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default: localhost
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login_port:
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description:
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- The port to connect to
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required: false
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default: 6379
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master_host:
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description:
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- The host of the master instance [slave command]
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required: false
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default: null
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master_port:
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description:
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- The port of the master instance [slave command]
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required: false
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default: null
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slave_mode:
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description:
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- the mode of the redis instance [slave command]
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required: false
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default: slave
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choices: [ "master", "slave" ]
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db:
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description:
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- The database to flush (used in db mode) [flush command]
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required: false
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default: null
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flush_mode:
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description:
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- Type of flush (all the dbs in a redis instance or a specific one)
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[flush command]
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required: false
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default: all
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choices: [ "all", "db" ]
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notes:
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- Requires the redis-py Python package on the remote host. You can
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install it with pip (pip install redis) or with a package manager.
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https://github.com/andymccurdy/redis-py
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- If the redis master instance we are making slave of is password protected
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this needs to be in the redis.conf in the masterauth variable
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requirements: [ redis ]
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author: Xabier Larrakoetxea
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'''
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EXAMPLES = '''
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# Set local redis instance to be slave of melee.island on port 6377
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- redis: command=slave master_host=melee.island master_port=6377
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# Deactivate slave mode
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- redis: command=slave slave_mode=master
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# Flush all the redis db
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- redis: command=flush flush_mode=all
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# Flush only one db in a redis instance
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- redis: command=flush db=1 flush_mode=db
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'''
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try:
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import redis
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except ImportError:
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redis_found = False
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else:
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redis_found = True
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# ===========================================
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# Redis module specific support methods.
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#
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def set_slave_mode(client, master_host, master_port):
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try:
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return client.slaveof(master_host, master_port)
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except Exception:
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return False
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def set_master_mode(client):
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try:
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return client.slaveof()
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except Exception:
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return False
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def flush(client, db=None):
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try:
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if type(db) != int:
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return client.flushall()
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else:
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# The passed client has been connected to the database already
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return client.flushdb()
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except Exception:
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return False
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# ===========================================
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# Module execution.
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#
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def main():
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module = AnsibleModule(
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argument_spec = dict(
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command=dict(default=None, choices=['slave', 'flush']),
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login_password=dict(default=None),
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login_host=dict(default='localhost'),
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login_port=dict(default='6379'),
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master_host=dict(default=None),
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master_port=dict(default=None),
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slave_mode=dict(default='slave', choices=['master', 'slave']),
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db=dict(default=None),
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flush_mode=dict(default='all', choices=['all', 'db']),
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),
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supports_check_mode = True
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)
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if not redis_found:
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module.fail_json(msg="python redis module is required")
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login_password = module.params['login_password']
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login_host = module.params['login_host']
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login_port = int(module.params['login_port'])
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command = module.params['command']
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# Slave Command section -----------
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if command == "slave":
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master_host = module.params['master_host']
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master_port = module.params['master_port']
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try:
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master_port = int(module.params['master_port'])
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except Exception:
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pass
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mode = module.params['slave_mode']
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#Check if we ahve all the data
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if mode == "slave": # Only need data if we want to be slave
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if not master_host:
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module.fail_json(
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msg='In slave mode master host must be provided')
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if not master_port:
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module.fail_json(
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msg='In slave mode master port must be provided')
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#Connect and check
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r = redis.StrictRedis(host=login_host,
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port=login_port,
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password=login_password)
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try:
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r.ping()
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except Exception, e:
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module.fail_json(msg="unable to connect to database: %s" % e)
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#Check if we are already in the mode that we want
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info = r.info()
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if mode == "master" and info["role"] == "master":
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module.exit_json(changed=False, mode=mode)
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elif mode == "slave" and\
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info["role"] == "slave" and\
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info["master_host"] == master_host and\
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info["master_port"] == master_port:
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status = {
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'status': mode,
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'master_host': master_host,
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'master_port': master_port,
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}
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module.exit_json(changed=False, mode=status)
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else:
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# Do the stuff
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# (Check Check_mode before commands so the commands aren't evaluated
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# if not necesary)
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if mode == "slave":
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if module.check_mode or\
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set_slave_mode(r, master_host, master_port):
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info = r.info()
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status = {
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'status': mode,
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'master_host': master_host,
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'master_port': master_port,
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}
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module.exit_json(changed=True, mode=status)
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else:
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module.fail_json(msg='Unable to set slave mode')
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else:
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if module.check_mode or set_master_mode(r):
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module.exit_json(changed=True, mode=mode)
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else:
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module.fail_json(msg='Unable to set master mode')
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# flush Command section -----------
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elif command == "flush":
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try:
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db = int(module.params['db'])
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except Exception:
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db = 0
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mode = module.params['flush_mode']
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#Check if we have all the data
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if mode == "db":
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if type(db) != int:
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module.fail_json(
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msg="In db mode the db number must be provided")
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#Connect and check
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r = redis.StrictRedis(host=login_host,
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port=login_port,
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password=login_password,
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db=db)
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try:
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r.ping()
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except Exception, e:
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module.fail_json(msg="unable to connect to database: %s" % e)
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# Do the stuff
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# (Check Check_mode before commands so the commands aren't evaluated
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# if not necesary)
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if mode == "all":
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if module.check_mode or flush(r):
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module.exit_json(changed=True, flushed=True)
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else: # Flush never fails :)
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module.fail_json(msg="Unable to flush all databases")
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else:
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if module.check_mode or flush(r, db):
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module.exit_json(changed=True, flushed=True, db=db)
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else: # Flush never fails :)
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module.fail_json(msg="Unable to flush '%d' database" % db)
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else:
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module.fail_json(msg='A valid command must be provided')
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# this is magic, see lib/ansible/module_common.py
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#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
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main()
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