#!/usr/bin/python # (c) 2012, Mark Theunissen # Sponsored by Four Kitchens http://fourkitchens.com. # # 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_user short_description: Adds or removes a user from a MySQL database. description: - Adds or removes a user from a MySQL database. version_added: "0.6" options: name: description: - name of the user (role) to add or remove required: true default: null password: description: - set the user's password required: false default: null host: description: - the 'host' part of the MySQL username required: false default: localhost login_user: description: - The username used to authenticate with required: false default: null login_password: description: - The password used to authenticate with required: false default: null login_host: description: - Host running the database required: false default: localhost login_port: description: - Port of the MySQL server required: false default: 3306 version_added: '1.4' login_unix_socket: description: - The path to a Unix domain socket for local connections required: false default: null priv: description: - "MySQL privileges string in the format: C(db.table:priv1,priv2)" required: false default: null append_privs: description: - Append the privileges defined by priv to the existing ones for this user instead of overwriting existing ones. required: false choices: [ "yes", "no" ] default: "no" version_added: "1.4" state: description: - Whether the user should exist. When C(absent), removes the user. required: false default: present choices: [ "present", "absent" ] check_implicit_admin: description: - Check if mysql allows login as root/nopassword before trying supplied credentials. required: false default: false version_added: "1.3" notes: - Requires the MySQLdb Python package on the remote host. For Ubuntu, this is as easy as apt-get install python-mysqldb. - Both C(login_password) and C(login_username) are required when you are passing credentials. If none are present, the module will attempt to read the credentials from C(~/.my.cnf), and finally fall back to using the MySQL default login of 'root' with no password. - "MySQL server installs with default login_user of 'root' and no password. To secure this user as part of an idempotent playbook, you must create at least two tasks: the first must change the root user's password, without providing any login_user/login_password details. The second must drop a ~/.my.cnf file containing the new root credentials. Subsequent runs of the playbook will then succeed by reading the new credentials from the file." requirements: [ "ConfigParser", "MySQLdb" ] author: Mark Theunissen ''' EXAMPLES = """ # Create database user with name 'bob' and password '12345' with all database privileges - mysql_user: name=bob password=12345 priv=*.*:ALL state=present # Ensure no user named 'sally' exists, also passing in the auth credentials. - mysql_user: login_user=root login_password=123456 name=sally state=absent # Example privileges string format mydb.*:INSERT,UPDATE/anotherdb.*:SELECT/yetanotherdb.*:ALL # Example using login_unix_socket to connect to server - mysql_user: name=root password=abc123 login_unix_socket=/var/run/mysqld/mysqld.sock # Example .my.cnf file for setting the root password # Note: don't use quotes around the password, because the mysql_user module # will include them in the password but the mysql client will not [client] user=root password=n<_665{vS43y """ import ConfigParser import getpass import tempfile try: import MySQLdb except ImportError: mysqldb_found = False else: mysqldb_found = True # =========================================== # MySQL module specific support methods. # def user_exists(cursor, user, host): cursor.execute("SELECT count(*) FROM user WHERE user = %s AND host = %s", (user,host)) count = cursor.fetchone() return count[0] > 0 def load_plugin(cursor, plugin): cursor.execute("SELECT count(*) FROM plugin WHERE name = %s", plugin) count = cursor.fetchone() if count[0] == 0: so = "%s.so" % plugin cursor.execute("INSTALL PLUGIN %s SONAME %s", (plugin, so)) def user_add(cursor, user, host, password, new_priv, auth_plugin): if password is None: # Automatically loaded on first first use. load_plugin(cursor, auth_plugin) cursor.execute("CREATE USER %s@%s IDENTIFIED WITH %s", (user,host,auth_plugin)) else: cursor.execute("CREATE USER %s@%s IDENTIFIED BY %s", (user,host,password)) if new_priv is not None: for db_table, priv in new_priv.iteritems(): privileges_grant(cursor, user,host,db_table,priv) return True def user_mod(cursor, user, host, password, new_priv, append_privs, auth_plugin): changed = False grant_option = False # Handle plugin. if auth_plugin is not None: cursor.execute("SELECT plugin FROM user WHERE user = %s AND host = %s", (user,host)) if cursor.fetchone()[0] != auth_plugin: # Sadly there is no proper way to updade the authentication plugin: # http://bugs.mysql.com/bug.php?id=67449 cursor.execute( "UPDATE user SET plugin = %s, password = '' WHERE user = %s AND host = %s" , (auth_plugin,user,host)) cursor.execute("FLUSH PRIVILEGES") changed = True # Handle passwords. if password is not None: cursor.execute("SELECT password FROM user WHERE user = %s AND host = %s", (user,host)) current_pass_hash = cursor.fetchone() cursor.execute("SELECT PASSWORD(%s)", (password,)) new_pass_hash = cursor.fetchone() if current_pass_hash[0] != new_pass_hash[0]: cursor.execute("SET PASSWORD FOR %s@%s = PASSWORD(%s)", (user,host,password)) changed = True # Handle privileges. if new_priv is not None: curr_priv = privileges_get(cursor, user,host) # If the user has privileges on a db.table that doesn't appear at all in # the new specification, then revoke all privileges on it. for db_table, priv in curr_priv.iteritems(): # If the user has the GRANT OPTION on a db.table, revoke it first. if "GRANT" in priv: grant_option = True if db_table not in new_priv: if user != "root" and "PROXY" not in priv and not append_privs: privileges_revoke(cursor, user,host,db_table,grant_option) changed = True # If the user doesn't currently have any privileges on a db.table, then # we can perform a straight grant operation. for db_table, priv in new_priv.iteritems(): if db_table not in curr_priv: privileges_grant(cursor, user,host,db_table,priv) changed = True # If the db.table specification exists in both the user's current privileges # and in the new privileges, then we need to see if there's a difference. db_table_intersect = set(new_priv.keys()) & set(curr_priv.keys()) for db_table in db_table_intersect: priv_diff = set(new_priv[db_table]) ^ set(curr_priv[db_table]) if (len(priv_diff) > 0): privileges_revoke(cursor, user,host,db_table,grant_option) privileges_grant(cursor, user,host,db_table,new_priv[db_table]) changed = True return changed def user_delete(cursor, user, host): cursor.execute("DROP USER %s@%s", (user,host)) return True def privileges_get(cursor, user,host): """ MySQL doesn't have a better method of getting privileges aside from the SHOW GRANTS query syntax, which requires us to then parse the returned string. Here's an example of the string that is returned from MySQL: GRANT USAGE ON *.* TO 'user'@'localhost' IDENTIFIED BY 'pass'; This function makes the query and returns a dictionary containing the results. The dictionary format is the same as that returned by privileges_unpack() below. """ output = {} cursor.execute("SHOW GRANTS FOR %s@%s", (user,host)) grants = cursor.fetchall() def pick(x): if x == 'ALL PRIVILEGES': return 'ALL' else: return x for grant in grants: res = re.match("GRANT (.+) ON (.+) TO '.+'@'.+'( IDENTIFIED BY PASSWORD '.+')? ?(.*)", grant[0]) if res is None: module.fail_json(msg="unable to parse the MySQL grant string") privileges = res.group(1).split(", ") privileges = [ pick(x) for x in privileges] if "WITH GRANT OPTION" in res.group(4): privileges.append('GRANT') db = res.group(2) output[db] = privileges return output def privileges_unpack(priv): """ Take a privileges string, typically passed as a parameter, and unserialize it into a dictionary, the same format as privileges_get() above. We have this custom format to avoid using YAML/JSON strings inside YAML playbooks. Example of a privileges string: mydb.*:INSERT,UPDATE/anotherdb.*:SELECT/yetanother.*:ALL The privilege USAGE stands for no privileges, so we add that in on *.* if it's not specified in the string, as MySQL will always provide this by default. """ output = {} for item in priv.split('/'): pieces = item.split(':') if pieces[0].find('.') != -1: pieces[0] = pieces[0].split('.') for idx, piece in enumerate(pieces): if pieces[0][idx] != "*": pieces[0][idx] = "`" + pieces[0][idx] + "`" pieces[0] = '.'.join(pieces[0]) output[pieces[0]] = pieces[1].upper().split(',') if '*.*' not in output: output['*.*'] = ['USAGE'] return output def privileges_revoke(cursor, user,host,db_table,grant_option): if grant_option: query = "REVOKE GRANT OPTION ON %s FROM '%s'@'%s'" % (db_table,user,host) cursor.execute(query) query = "REVOKE ALL PRIVILEGES ON %s FROM '%s'@'%s'" % (db_table,user,host) cursor.execute(query) def privileges_grant(cursor, user,host,db_table,priv): priv_string = ",".join(filter(lambda x: x != 'GRANT', priv)) query = "GRANT %s ON %s TO '%s'@'%s'" % (priv_string,db_table,user,host) if 'GRANT' in priv: query = query + " WITH GRANT OPTION" cursor.execute(query) def strip_quotes(s): """ Remove surrounding single or double quotes >>> print strip_quotes('hello') hello >>> print strip_quotes('"hello"') hello >>> print strip_quotes("'hello'") hello >>> print strip_quotes("'hello") 'hello """ single_quote = "'" double_quote = '"' if s.startswith(single_quote) and s.endswith(single_quote): s = s.strip(single_quote) elif s.startswith(double_quote) and s.endswith(double_quote): s = s.strip(double_quote) return s def config_get(config, section, option): """ Calls ConfigParser.get and strips quotes See: http://dev.mysql.com/doc/refman/5.0/en/option-files.html """ return strip_quotes(config.get(section, option)) def _safe_cnf_load(config, path): data = {'user':'', 'password':''} # read in user/pass f = open(path, 'r') for line in f.readlines(): line = line.strip() if line.startswith('user='): data['user'] = line.split('=', 1)[1].strip() if line.startswith('password=') or line.startswith('pass='): data['password'] = line.split('=', 1)[1].strip() f.close() # write out a new cnf file with only user/pass fh, newpath = tempfile.mkstemp(prefix=path + '.') f = open(newpath, 'wb') f.write('[client]\n') f.write('user=%s\n' % data['user']) f.write('password=%s\n' % data['password']) f.close() config.readfp(open(newpath)) os.remove(newpath) return config def load_mycnf(): config = ConfigParser.RawConfigParser() mycnf = os.path.expanduser('~/.my.cnf') if not os.path.exists(mycnf): return False try: config.readfp(open(mycnf)) except (IOError): return False except: config = _safe_cnf_load(config, mycnf) # We support two forms of passwords in .my.cnf, both pass= and password=, # as these are both supported by MySQL. try: passwd = config_get(config, 'client', 'password') except (ConfigParser.NoOptionError): try: passwd = config_get(config, 'client', 'pass') except (ConfigParser.NoOptionError): return False # If .my.cnf doesn't specify a user, default to user login name try: user = config_get(config, 'client', 'user') except (ConfigParser.NoOptionError): user = getpass.getuser() creds = dict(user=user,passwd=passwd) return creds def connect(module, login_user, login_password): if module.params["login_unix_socket"]: db_connection = MySQLdb.connect(host=module.params["login_host"], unix_socket=module.params["login_unix_socket"], user=login_user, passwd=login_password, db="mysql") else: db_connection = MySQLdb.connect(host=module.params["login_host"], port=int(module.params["login_port"]), user=login_user, passwd=login_password, db="mysql") return db_connection.cursor() # =========================================== # Module execution. # 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"), login_unix_socket=dict(default=None), user=dict(required=True, aliases=['name']), password=dict(default=None), host=dict(default="localhost"), state=dict(default="present", choices=["absent", "present"]), priv=dict(default=None), append_privs=dict(type="bool", default="no"), check_implicit_admin=dict(default=False), auth_plugin=dict(default=None) ) ) user = module.params["user"] password = module.params["password"] host = module.params["host"] state = module.params["state"] priv = module.params["priv"] check_implicit_admin = module.params['check_implicit_admin'] append_privs = module.boolean(module.params["append_privs"]) auth_plugin = module.params['auth_plugin'] if not mysqldb_found: module.fail_json(msg="the python mysqldb module is required") if priv is not None: try: priv = privileges_unpack(priv) except: module.fail_json(msg="invalid privileges string") # Either the caller passes both a username and password with which to connect to # mysql, or they pass neither and allow this module to read the credentials from # ~/.my.cnf. login_password = module.params["login_password"] login_user = module.params["login_user"] if login_user is None and login_password is None: mycnf_creds = load_mycnf() if mycnf_creds is False: login_user = "root" login_password = "" else: login_user = mycnf_creds["user"] login_password = mycnf_creds["passwd"] elif login_password is None or login_user is None: module.fail_json(msg="when supplying login arguments, both login_user and login_password must be provided") cursor = None try: if check_implicit_admin: try: cursor = connect(module, 'root', '') except: pass if not cursor: cursor = connect(module, login_user, login_password) except Exception, e: module.fail_json(msg="unable to connect to database, check login_user and login_password are correct or ~/.my.cnf has the credentials") if state == "present": if user_exists(cursor, user, host): changed = user_mod(cursor, user, host, password, priv, append_privs, auth_plugin) else: if (password is None and auth_plugin is None) or (password is not None and auth_plugin is not None): module.fail_json(msg="password xor auth_plugin is required when adding a user") changed = user_add(cursor, user, host, password, priv, auth_plugin) elif state == "absent": if user_exists(cursor, user, host): changed = user_delete(cursor, user, host) else: changed = False module.exit_json(changed=changed, user=user) # this is magic, see lib/ansible/module_common.py #<> main()