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ansible/database/mysql/mysql_replication.py
Robin Schneider 67a1bebbd3 Use addresses and names reserved for documentation (#2894) 
Trying to preserve the meaning of the examples.

Related to: https://github.com/ansible/ansible/issues/17479
2016-09-12 11:27:45 +02:00

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#!/usr/bin/python
# -*- coding: utf-8 -*-
"""
Ansible module to manage mysql replication
(c) 2013, Balazs Pocze <banyek@gawker.com>
Certain parts are taken from Mark Theunissen's mysqldb module
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: mysql_replication
short_description: Manage MySQL replication
description:
- Manages MySQL server replication, slave, master status get and change master host.
version_added: "1.3"
author: "Balazs Pocze (@banyek)"
options:
mode:
description:
- module operating mode. Could be getslave (SHOW SLAVE STATUS), getmaster (SHOW MASTER STATUS), changemaster (CHANGE MASTER TO), startslave (START SLAVE), stopslave (STOP SLAVE), resetslave (RESET SLAVE), resetslaveall (RESET SLAVE ALL)
required: False
choices:
- getslave
- getmaster
- changemaster
- stopslave
- startslave
- resetslave
- resetslaveall
default: getslave
master_host:
description:
- same as mysql variable
master_user:
description:
- same as mysql variable
master_password:
description:
- same as mysql variable
master_port:
description:
- same as mysql variable
master_connect_retry:
description:
- same as mysql variable
master_log_file:
description:
- same as mysql variable
master_log_pos:
description:
- same as mysql variable
relay_log_file:
description:
- same as mysql variable
relay_log_pos:
description:
- same as mysql variable
master_ssl:
description:
- same as mysql variable
choices: [ 0, 1 ]
master_ssl_ca:
description:
- same as mysql variable
master_ssl_capath:
description:
- same as mysql variable
master_ssl_cert:
description:
- same as mysql variable
master_ssl_key:
description:
- same as mysql variable
master_ssl_cipher:
description:
- same as mysql variable
master_auto_position:
description:
- does the host uses GTID based replication or not
required: false
default: null
version_added: "2.0"
extends_documentation_fragment: mysql
'''
EXAMPLES = '''
# Stop mysql slave thread
- mysql_replication: mode=stopslave
# Get master binlog file name and binlog position
- mysql_replication: mode=getmaster
# Change master to master server 192.0.2.1 and use binary log 'mysql-bin.000009' with position 4578
- mysql_replication: mode=changemaster master_host=192.0.2.1 master_log_file=mysql-bin.000009 master_log_pos=4578
# Check slave status using port 3308
- mysql_replication: mode=getslave login_host=ansible.example.com login_port=3308
'''
import os
import warnings
try:
import MySQLdb
except ImportError:
mysqldb_found = False
else:
mysqldb_found = True
def get_master_status(cursor):
cursor.execute("SHOW MASTER STATUS")
masterstatus = cursor.fetchone()
return masterstatus
def get_slave_status(cursor):
cursor.execute("SHOW SLAVE STATUS")
slavestatus = cursor.fetchone()
return slavestatus
def stop_slave(cursor):
try:
cursor.execute("STOP SLAVE")
stopped = True
except:
stopped = False
return stopped
def reset_slave(cursor):
try:
cursor.execute("RESET SLAVE")
reset = True
except:
reset = False
return reset
def reset_slave_all(cursor):
try:
cursor.execute("RESET SLAVE ALL")
reset = True
except:
reset = False
return reset
def start_slave(cursor):
try:
cursor.execute("START SLAVE")
started = True
except:
started = False
return started
def changemaster(cursor, chm, chm_params):
sql_param = ",".join(chm)
query = 'CHANGE MASTER TO %s' % sql_param
cursor.execute(query, chm_params)
def main():
module = AnsibleModule(
argument_spec = dict(
login_user=dict(default=None),
login_password=dict(default=None),
login_host=dict(default="localhost"),
login_port=dict(default=3306, type='int'),
login_unix_socket=dict(default=None),
mode=dict(default="getslave", choices=["getmaster", "getslave", "changemaster", "stopslave", "startslave", "resetslave", "resetslaveall"]),
master_auto_position=dict(default=False, type='bool'),
master_host=dict(default=None),
master_user=dict(default=None),
master_password=dict(default=None),
master_port=dict(default=None, type='int'),
master_connect_retry=dict(default=None, type='int'),
master_log_file=dict(default=None),
master_log_pos=dict(default=None, type='int'),
relay_log_file=dict(default=None),
relay_log_pos=dict(default=None, type='int'),
master_ssl=dict(default=False, type='bool'),
master_ssl_ca=dict(default=None),
master_ssl_capath=dict(default=None),
master_ssl_cert=dict(default=None),
master_ssl_key=dict(default=None),
master_ssl_cipher=dict(default=None),
connect_timeout=dict(default=30, type='int'),
config_file=dict(default="~/.my.cnf"),
ssl_cert=dict(default=None),
ssl_key=dict(default=None),
ssl_ca=dict(default=None),
)
)
user = module.params["login_user"]
password = module.params["login_password"]
host = module.params["login_host"]
port = module.params["login_port"]
mode = module.params["mode"]
master_host = module.params["master_host"]
master_user = module.params["master_user"]
master_password = module.params["master_password"]
master_port = module.params["master_port"]
master_connect_retry = module.params["master_connect_retry"]
master_log_file = module.params["master_log_file"]
master_log_pos = module.params["master_log_pos"]
relay_log_file = module.params["relay_log_file"]
relay_log_pos = module.params["relay_log_pos"]
master_ssl = module.params["master_ssl"]
master_ssl_ca = module.params["master_ssl_ca"]
master_ssl_capath = module.params["master_ssl_capath"]
master_ssl_cert = module.params["master_ssl_cert"]
master_ssl_key = module.params["master_ssl_key"]
master_ssl_cipher = module.params["master_ssl_cipher"]
master_auto_position = module.params["master_auto_position"]
ssl_cert = module.params["ssl_cert"]
ssl_key = module.params["ssl_key"]
ssl_ca = module.params["ssl_ca"]
connect_timeout = module.params['connect_timeout']
config_file = module.params['config_file']
config_file = os.path.expanduser(os.path.expandvars(config_file))
if not mysqldb_found:
module.fail_json(msg="the python mysqldb module is required")
else:
warnings.filterwarnings('error', category=MySQLdb.Warning)
login_password = module.params["login_password"]
login_user = module.params["login_user"]
try:
cursor = mysql_connect(module, login_user, login_password, config_file, ssl_cert, ssl_key, ssl_ca, None, 'MySQLdb.cursors.DictCursor',
connect_timeout=connect_timeout)
except Exception, e:
if os.path.exists(config_file):
module.fail_json(msg="unable to connect to database, check login_user and login_password are correct or %s has the credentials. Exception message: %s" % (config_file, e))
else:
module.fail_json(msg="unable to find %s. Exception message: %s" % (config_file, e))
if mode in "getmaster":
status = get_master_status(cursor)
if not isinstance(status, dict):
status = dict(Is_Master=False, msg="Server is not configured as mysql master")
else:
status['Is_Master'] = True
module.exit_json(**status)
elif mode in "getslave":
status = get_slave_status(cursor)
if not isinstance(status, dict):
status = dict(Is_Slave=False, msg="Server is not configured as mysql slave")
else:
status['Is_Slave'] = True
module.exit_json(**status)
elif mode in "changemaster":
chm=[]
chm_params = {}
result = {}
if master_host:
chm.append("MASTER_HOST=%(master_host)s")
chm_params['master_host'] = master_host
if master_user:
chm.append("MASTER_USER=%(master_user)s")
chm_params['master_user'] = master_user
if master_password:
chm.append("MASTER_PASSWORD=%(master_password)s")
chm_params['master_password'] = master_password
if master_port is not None:
chm.append("MASTER_PORT=%(master_port)s")
chm_params['master_port'] = master_port
if master_connect_retry is not None:
chm.append("MASTER_CONNECT_RETRY=%(master_connect_retry)s")
chm_params['master_connect_retry'] = master_connect_retry
if master_log_file:
chm.append("MASTER_LOG_FILE=%(master_log_file)s")
chm_params['master_log_file'] = master_log_file
if master_log_pos is not None:
chm.append("MASTER_LOG_POS=%(master_log_pos)s")
chm_params['master_log_pos'] = master_log_pos
if relay_log_file:
chm.append("RELAY_LOG_FILE=%(relay_log_file)s")
chm_params['relay_log_file'] = relay_log_file
if relay_log_pos is not None:
chm.append("RELAY_LOG_POS=%(relay_log_pos)s")
chm_params['relay_log_pos'] = relay_log_pos
if master_ssl:
chm.append("MASTER_SSL=1")
if master_ssl_ca:
chm.append("MASTER_SSL_CA=%(master_ssl_ca)s")
chm_params['master_ssl_ca'] = master_ssl_ca
if master_ssl_capath:
chm.append("MASTER_SSL_CAPATH=%(master_ssl_capath)s")
chm_params['master_ssl_capath'] = master_ssl_capath
if master_ssl_cert:
chm.append("MASTER_SSL_CERT=%(master_ssl_cert)s")
chm_params['master_ssl_cert'] = master_ssl_cert
if master_ssl_key:
chm.append("MASTER_SSL_KEY=%(master_ssl_key)s")
chm_params['master_ssl_key'] = master_ssl_key
if master_ssl_cipher:
chm.append("MASTER_SSL_CIPHER=%(master_ssl_cipher)s")
chm_params['master_ssl_cipher'] = master_ssl_cipher
if master_auto_position:
chm.append("MASTER_AUTO_POSITION = 1")
try:
changemaster(cursor, chm, chm_params)
except MySQLdb.Warning, e:
result['warning'] = str(e)
except Exception, e:
module.fail_json(msg='%s. Query == CHANGE MASTER TO %s' % (e, chm))
result['changed']=True
module.exit_json(**result)
elif mode in "startslave":
started = start_slave(cursor)
if started is True:
module.exit_json(msg="Slave started ", changed=True)
else:
module.exit_json(msg="Slave already started (Or cannot be started)", changed=False)
elif mode in "stopslave":
stopped = stop_slave(cursor)
if stopped is True:
module.exit_json(msg="Slave stopped", changed=True)
else:
module.exit_json(msg="Slave already stopped", changed=False)
elif mode in "resetslave":
reset = reset_slave(cursor)
if reset is True:
module.exit_json(msg="Slave reset", changed=True)
else:
module.exit_json(msg="Slave already reset", changed=False)
elif mode in "resetslaveall":
reset = reset_slave_all(cursor)
if reset is True:
module.exit_json(msg="Slave reset", changed=True)
else:
module.exit_json(msg="Slave already reset", changed=False)
# import module snippets
from ansible.module_utils.basic import *
from ansible.module_utils.mysql import *
main()
warnings.simplefilter("ignore")
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