#!/usr/bin/python # -*- coding: utf-8 -*- """ Ansible module to manage mysql variables (c) 2013, Balazs Pocze 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 . """ DOCUMENTATION = ''' --- module: mysql_variables short_description: Manage MySQL global variables description: - Query / Set MySQL variables version_added: 1.3 author: "Balazs Pocze (@banyek)" options: variable: description: - Variable name to operate required: True value: description: - If set, then sets variable value to this required: False extends_documentation_fragment: mysql ''' EXAMPLES = ''' # Check for sync_binlog setting - mysql_variables: variable=sync_binlog # Set read_only variable to 1 - mysql_variables: variable=read_only value=1 ''' import os import warnings from re import match try: import MySQLdb except ImportError: mysqldb_found = False else: mysqldb_found = True def typedvalue(value): """ Convert value to number whenever possible, return same value otherwise. >>> typedvalue('3') 3 >>> typedvalue('3.0') 3.0 >>> typedvalue('foobar') 'foobar' """ try: return int(value) except ValueError: pass try: return float(value) except ValueError: pass return value def getvariable(cursor, mysqlvar): cursor.execute("SHOW VARIABLES WHERE Variable_name = %s", (mysqlvar,)) mysqlvar_val = cursor.fetchall() if len(mysqlvar_val) is 1: return mysqlvar_val[0][1] else: return None def setvariable(cursor, mysqlvar, value): """ Set a global mysql variable to a given value The DB driver will handle quoting of the given value based on its type, thus numeric strings like '3.0' or '8' are illegal, they should be passed as numeric literals. """ query = "SET GLOBAL %s = " % mysql_quote_identifier(mysqlvar, 'vars') try: cursor.execute(query + "%s", (value,)) cursor.fetchall() result = True except Exception, e: result = str(e) return result def main(): module = AnsibleModule( argument_spec = dict( login_user=dict(default=None), login_password=dict(default=None), login_host=dict(default="127.0.0.1"), login_port=dict(default="3306", type='int'), login_unix_socket=dict(default=None), variable=dict(default=None), value=dict(default=None), ssl_cert=dict(default=None), ssl_key=dict(default=None), ssl_ca=dict(default=None), config_file=dict(default="~/.my.cnf") ) ) user = module.params["login_user"] password = module.params["login_password"] host = module.params["login_host"] port = module.params["login_port"] ssl_cert = module.params["ssl_cert"] ssl_key = module.params["ssl_key"] ssl_ca = module.params["ssl_ca"] config_file = module.params['config_file'] config_file = os.path.expanduser(os.path.expandvars(config_file)) db = 'mysql' mysqlvar = module.params["variable"] value = module.params["value"] if mysqlvar is None: module.fail_json(msg="Cannot run without variable to operate with") if match('^[0-9a-z_]+$', mysqlvar) is None: module.fail_json(msg="invalid variable name \"%s\"" % mysqlvar) if not mysqldb_found: module.fail_json(msg="the python mysqldb module is required") else: warnings.filterwarnings('error', category=MySQLdb.Warning) try: cursor = mysql_connect(module, user, password, config_file, ssl_cert, ssl_key, ssl_ca, db) 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)) mysqlvar_val = getvariable(cursor, mysqlvar) if mysqlvar_val is None: module.fail_json(msg="Variable not available \"%s\"" % mysqlvar, changed=False) if value is None: module.exit_json(msg=mysqlvar_val) else: # Type values before using them value_wanted = typedvalue(value) value_actual = typedvalue(mysqlvar_val) if value_wanted == value_actual: module.exit_json(msg="Variable already set to requested value", changed=False) try: result = setvariable(cursor, mysqlvar, value_wanted) except SQLParseError, e: result = str(e) if result is True: module.exit_json(msg="Variable change succeeded prev_value=%s" % value_actual, changed=True) else: module.fail_json(msg=result, changed=False) # import module snippets from ansible.module_utils.basic import * from ansible.module_utils.database import * from ansible.module_utils.mysql import * main()