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ansible/library/database/mysql_user

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#!/usr/bin/python
# (c) 2012, Mark Theunissen <mark.theunissen@gmail.com>
# 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 <http://www.gnu.org/licenses/>.
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 user_add(cursor, user, host, password, new_priv):
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):
changed = False
grant_option = False
# 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),
)
)
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"])
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)
else:
if password is None:
module.fail_json(msg="password parameter required when adding a user")
changed = user_add(cursor, user, host, password, priv)
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
from ansible.module_utils.basic import *
main()
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