368 lines
12 KiB
Python
368 lines
12 KiB
Python
#!/usr/bin/python
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# -*- coding: utf-8 -*-
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"""
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Ansible module to manage mysql replication
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(c) 2013, Balazs Pocze <banyek@gawker.com>
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Certain parts are taken from Mark Theunissen's mysqldb module
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This file is part of Ansible
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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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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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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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"""
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DOCUMENTATION = '''
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---
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module: mysql_replication
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short_description: Manage MySQL replication
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description:
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- Manages MySQL server replication, slave, master status get and change master host.
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version_added: "1.3"
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options:
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mode:
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description:
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- module operating mode. Could be getslave (SHOW SLAVE STATUS), getmaster (SHOW MASTER STATUS), changemaster (CHANGE MASTER TO), startslave (START SLAVE), stopslave (STOP SLAVE)
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required: False
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choices:
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- getslave
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- getmaster
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- changemaster
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- stopslave
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- startslave
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default: getslave
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login_user:
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description:
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- username to connect mysql host, if defined login_password also needed.
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required: False
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login_password:
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description:
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- password to connect mysql host, if defined login_user also needed.
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required: False
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login_host:
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description:
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- mysql host to connect
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required: False
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login_unix_socket:
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description:
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- unix socket to connect mysql server
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master_host:
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description:
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- same as mysql variable
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master_user:
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description:
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- same as mysql variable
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master_password:
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description:
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- same as mysql variable
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master_port:
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description:
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- same as mysql variable
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master_connect_retry:
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description:
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- same as mysql variable
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master_log_file:
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description:
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- same as mysql variable
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master_log_pos:
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description:
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- same as mysql variable
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relay_log_file:
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description:
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- same as mysql variable
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relay_log_pos:
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description:
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- same as mysql variable
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master_ssl:
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description:
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- same as mysql variable
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possible values: 0,1
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master_ssl_ca:
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description:
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- same as mysql variable
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master_ssl_capath:
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description:
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- same as mysql variable
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master_ssl_cert:
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description:
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- same as mysql variable
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master_ssl_key:
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description:
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- same as mysql variable
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master_ssl_cipher:
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description:
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- same as mysql variable
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'''
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EXAMPLES = '''
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# Stop mysql slave thread
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- mysql_replication: mode=stopslave
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# Get master binlog file name and binlog position
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- mysql_replication: mode=getmaster
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# Change master to master server 192.168.1.1 and use binary log 'mysql-bin.000009' with position 4578
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- mysql_replication: mode=changemaster master_host=192.168.1.1 master_log_file=mysql-bin.000009 master_log_pos=4578
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'''
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import ConfigParser
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import os
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import warnings
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try:
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import MySQLdb
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except ImportError:
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mysqldb_found = False
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else:
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mysqldb_found = True
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def get_master_status(cursor):
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cursor.execute("SHOW MASTER STATUS")
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masterstatus = cursor.fetchone()
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return masterstatus
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def get_slave_status(cursor):
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cursor.execute("SHOW SLAVE STATUS")
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slavestatus = cursor.fetchone()
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return slavestatus
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def stop_slave(cursor):
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try:
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cursor.execute("STOP SLAVE")
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stopped = True
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except:
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stopped = False
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return stopped
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def start_slave(cursor):
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try:
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cursor.execute("START SLAVE")
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started = True
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except:
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started = False
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return started
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def changemaster(cursor, chm):
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SQLPARAM = ",".join(chm)
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cursor.execute("CHANGE MASTER TO " + SQLPARAM)
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def strip_quotes(s):
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""" Remove surrounding single or double quotes
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>>> print strip_quotes('hello')
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hello
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>>> print strip_quotes('"hello"')
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hello
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>>> print strip_quotes("'hello'")
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hello
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>>> print strip_quotes("'hello")
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'hello
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"""
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single_quote = "'"
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double_quote = '"'
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if s.startswith(single_quote) and s.endswith(single_quote):
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s = s.strip(single_quote)
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elif s.startswith(double_quote) and s.endswith(double_quote):
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s = s.strip(double_quote)
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return s
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def config_get(config, section, option):
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""" Calls ConfigParser.get and strips quotes
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See: http://dev.mysql.com/doc/refman/5.0/en/option-files.html
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"""
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return strip_quotes(config.get(section, option))
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def load_mycnf():
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config = ConfigParser.RawConfigParser()
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mycnf = os.path.expanduser('~/.my.cnf')
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if not os.path.exists(mycnf):
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return False
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try:
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config.readfp(open(mycnf))
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except (IOError):
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return False
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# We support two forms of passwords in .my.cnf, both pass= and password=,
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# as these are both supported by MySQL.
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try:
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passwd = config_get(config, 'client', 'password')
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except (ConfigParser.NoOptionError):
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try:
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passwd = config_get(config, 'client', 'pass')
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except (ConfigParser.NoOptionError):
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return False
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# If .my.cnf doesn't specify a user, default to user login name
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try:
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user = config_get(config, 'client', 'user')
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except (ConfigParser.NoOptionError):
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user = getpass.getuser()
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creds = dict(user=user, passwd=passwd)
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return creds
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def main():
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module = AnsibleModule(
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argument_spec = dict(
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login_user=dict(default=None),
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login_password=dict(default=None),
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login_host=dict(default="localhost"),
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login_unix_socket=dict(default=None),
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mode=dict(default="getslave", choices=["getmaster", "getslave", "changemaster", "stopslave", "startslave"]),
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master_host=dict(default=None),
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master_user=dict(default=None),
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master_password=dict(default=None),
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master_port=dict(default=None),
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master_connect_retry=dict(default=None),
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master_log_file=dict(default=None),
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master_log_pos=dict(default=None),
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relay_log_file=dict(default=None),
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relay_log_pos=dict(default=None),
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master_ssl=dict(default=False, type='bool'),
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master_ssl_ca=dict(default=None),
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master_ssl_capath=dict(default=None),
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master_ssl_cert=dict(default=None),
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master_ssl_key=dict(default=None),
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master_ssl_cipher=dict(default=None),
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)
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)
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user = module.params["login_user"]
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password = module.params["login_password"]
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host = module.params["login_host"]
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mode = module.params["mode"]
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master_host = module.params["master_host"]
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master_user = module.params["master_user"]
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master_password = module.params["master_password"]
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master_port = module.params["master_port"]
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master_connect_retry = module.params["master_connect_retry"]
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master_log_file = module.params["master_log_file"]
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master_log_pos = module.params["master_log_pos"]
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relay_log_file = module.params["relay_log_file"]
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relay_log_pos = module.params["relay_log_pos"]
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master_ssl = module.params["master_ssl"]
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master_ssl_ca = module.params["master_ssl_ca"]
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master_ssl_capath = module.params["master_ssl_capath"]
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master_ssl_cert = module.params["master_ssl_cert"]
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master_ssl_key = module.params["master_ssl_key"]
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master_ssl_cipher = module.params["master_ssl_cipher"]
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if not mysqldb_found:
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module.fail_json(msg="the python mysqldb module is required")
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else:
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warnings.filterwarnings('error', category=MySQLdb.Warning)
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# Either the caller passes both a username and password with which to connect to
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# mysql, or they pass neither and allow this module to read the credentials from
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# ~/.my.cnf.
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login_password = module.params["login_password"]
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login_user = module.params["login_user"]
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if login_user is None and login_password is None:
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mycnf_creds = load_mycnf()
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if mycnf_creds is False:
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login_user = "root"
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login_password = ""
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else:
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login_user = mycnf_creds["user"]
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login_password = mycnf_creds["passwd"]
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elif login_password is None or login_user is None:
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module.fail_json(msg="when supplying login arguments, both login_user and login_password must be provided")
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try:
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if module.params["login_unix_socket"]:
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db_connection = MySQLdb.connect(host=module.params["login_host"], unix_socket=module.params["login_unix_socket"], user=login_user, passwd=login_password, db="mysql")
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else:
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db_connection = MySQLdb.connect(host=module.params["login_host"], user=login_user, passwd=login_password, db="mysql")
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except Exception, e:
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module.fail_json(msg="unable to connect to database, check login_user and login_password are correct or ~/.my.cnf has the credentials")
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try:
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cursor = db_connection.cursor(cursorclass=MySQLdb.cursors.DictCursor)
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except Exception, e:
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module.fail_json(msg="Trouble getting DictCursor from db_connection: %s" % e)
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if mode in "getmaster":
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masterstatus = get_master_status(cursor)
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try:
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module.exit_json( **masterstatus )
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except TypeError:
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module.fail_json(msg="Server is not configured as mysql master")
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elif mode in "getslave":
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slavestatus = get_slave_status(cursor)
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try:
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module.exit_json( **slavestatus )
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except TypeError:
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module.fail_json(msg="Server is not configured as mysql slave")
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elif mode in "changemaster":
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print "Change master"
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chm=[]
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if master_host:
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chm.append("MASTER_HOST='" + master_host + "'")
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if master_user:
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chm.append("MASTER_USER='" + master_user + "'")
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if master_password:
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chm.append("MASTER_PASSWORD='" + master_password + "'")
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if master_port:
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chm.append("MASTER_PORT=" + master_port)
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if master_connect_retry:
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chm.append("MASTER_CONNECT_RETRY='" + master_connect_retry + "'")
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if master_log_file:
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chm.append("MASTER_LOG_FILE='" + master_log_file + "'")
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if master_log_pos:
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chm.append("MASTER_LOG_POS=" + master_log_pos)
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if relay_log_file:
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chm.append("RELAY_LOG_FILE='" + relay_log_file + "'")
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if relay_log_pos:
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chm.append("RELAY_LOG_POS=" + relay_log_pos)
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if master_ssl:
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chm.append("MASTER_SSL=1")
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if master_ssl_ca:
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chm.append("MASTER_SSL_CA='" + master_ssl_ca + "'")
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if master_ssl_capath:
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chm.append("MASTER_SSL_CAPATH='" + master_ssl_capath + "'")
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if master_ssl_cert:
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chm.append("MASTER_SSL_CERT='" + master_ssl_cert + "'")
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if master_ssl_key:
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chm.append("MASTER_SSL_KEY='" + master_ssl_key + "'")
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if master_ssl_cipher:
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chm.append("MASTER_SSL_CIPHER='" + master_ssl_cipher + "'")
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changemaster(cursor,chm)
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module.exit_json(changed=True)
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elif mode in "startslave":
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started = start_slave(cursor)
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if started is True:
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module.exit_json(msg="Slave started ", changed=True)
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else:
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module.exit_json(msg="Slave already started (Or cannot be started)", changed=False)
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elif mode in "stopslave":
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stopped = stop_slave(cursor)
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if stopped is True:
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module.exit_json(msg="Slave stopped", changed=True)
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else:
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module.exit_json(msg="Slave already stopped", changed=False)
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# import module snippets
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from ansible.module_utils.basic import *
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main()
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