1
0
Fork 0
mirror of https://github.com/ansible-collections/community.general.git synced 2024-09-14 20:13:21 +02:00
community.general/plugins/modules/database/mysql/mysql_replication.py

568 lines
19 KiB
Python
Raw Normal View History

2020-03-09 10:11:07 +01:00
#!/usr/bin/python
# -*- coding: utf-8 -*-
# Copyright: (c) 2013, Balazs Pocze <banyek@gawker.com>
# Copyright: (c) 2019, Andrew Klychkov (@Andersson007) <aaklychkov@mail.ru>
# Certain parts are taken from Mark Theunissen's mysqldb module
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
from __future__ import absolute_import, division, print_function
__metaclass__ = type
DOCUMENTATION = r'''
---
module: mysql_replication
short_description: Manage MySQL replication
description:
- Manages MySQL server replication, slave, master status, get and change master host.
author:
- Balazs Pocze (@banyek)
- Andrew Klychkov (@Andersson007)
options:
mode:
description:
- Module operating mode. Could be
C(changemaster) (CHANGE MASTER TO),
C(getmaster) (SHOW MASTER STATUS),
C(getslave) (SHOW SLAVE STATUS),
C(startslave) (START SLAVE),
C(stopslave) (STOP SLAVE),
C(resetmaster) (RESET MASTER) - supported from Ansible 2.10,
C(resetslave) (RESET SLAVE),
C(resetslaveall) (RESET SLAVE ALL).
type: str
choices:
- changemaster
- getmaster
- getslave
- startslave
- stopslave
- resetmaster
- resetslave
- resetslaveall
default: getslave
master_host:
description:
- Same as mysql variable.
type: str
master_user:
description:
- Same as mysql variable.
type: str
master_password:
description:
- Same as mysql variable.
type: str
master_port:
description:
- Same as mysql variable.
type: int
master_connect_retry:
description:
- Same as mysql variable.
type: int
master_log_file:
description:
- Same as mysql variable.
type: str
master_log_pos:
description:
- Same as mysql variable.
type: int
relay_log_file:
description:
- Same as mysql variable.
type: str
relay_log_pos:
description:
- Same as mysql variable.
type: int
master_ssl:
description:
- Same as mysql variable.
type: bool
master_ssl_ca:
description:
- Same as mysql variable.
type: str
master_ssl_capath:
description:
- Same as mysql variable.
type: str
master_ssl_cert:
description:
- Same as mysql variable.
type: str
master_ssl_key:
description:
- Same as mysql variable.
type: str
master_ssl_cipher:
description:
- Same as mysql variable.
type: str
master_auto_position:
description:
- Whether the host uses GTID based replication or not.
type: bool
master_use_gtid:
description:
- Configures the slave to use the MariaDB Global Transaction ID.
- C(disabled) equals MASTER_USE_GTID=no command.
- To find information about available values see
U(https://mariadb.com/kb/en/library/change-master-to/#master_use_gtid).
- Available since MariaDB 10.0.2.
choices: [current_pos, slave_pos, disabled]
type: str
master_delay:
description:
- Time lag behind the master's state (in seconds).
- Available from MySQL 5.6.
- For more information see U(https://dev.mysql.com/doc/refman/8.0/en/replication-delayed.html).
type: int
connection_name:
description:
- Name of the master connection.
- Supported from MariaDB 10.0.1.
- Mutually exclusive with I(channel).
- For more information see U(https://mariadb.com/kb/en/library/multi-source-replication/).
type: str
channel:
description:
- Name of replication channel.
- Multi-source replication is supported from MySQL 5.7.
- Mutually exclusive with I(connection_name).
- For more information see U(https://dev.mysql.com/doc/refman/8.0/en/replication-multi-source.html).
type: str
fail_on_error:
description:
- Fails on error when calling mysql.
type: bool
default: False
notes:
- If an empty value for the parameter of string type is needed, use an empty string.
extends_documentation_fragment:
- community.general.mysql
seealso:
- module: mysql_info
- name: MySQL replication reference
description: Complete reference of the MySQL replication documentation.
link: https://dev.mysql.com/doc/refman/8.0/en/replication.html
- name: MariaDB replication reference
description: Complete reference of the MariaDB replication documentation.
link: https://mariadb.com/kb/en/library/setting-up-replication/
'''
EXAMPLES = r'''
- name: Stop mysql slave thread
mysql_replication:
mode: stopslave
- name: Get master binlog file name and binlog position
mysql_replication:
mode: getmaster
- name: 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
- name: Check slave status using port 3308
mysql_replication:
mode: getslave
login_host: ansible.example.com
login_port: 3308
- name: On MariaDB change master to use GTID current_pos
mysql_replication:
mode: changemaster
master_use_gtid: current_pos
- name: Change master to use replication delay 3600 seconds
mysql_replication:
mode: changemaster
master_host: 192.0.2.1
master_delay: 3600
- name: Start MariaDB standby with connection name master-1
mysql_replication:
mode: startslave
connection_name: master-1
- name: Stop replication in channel master-1
mysql_replication:
mode: stopslave
channel: master-1
- name: >
Run RESET MASTER command which will delete all existing binary log files
and reset the binary log index file on the master
mysql_replication:
mode: resetmaster
- name: Run start slave and fail the task on errors
mysql_replication:
mode: startslave
connection_name: master-1
fail_on_error: yes
- name: Change master and fail on error (like when slave thread is running)
mysql_replication:
mode: changemaster
fail_on_error: yes
'''
RETURN = r'''
queries:
description: List of executed queries which modified DB's state.
returned: always
type: list
sample: ["CHANGE MASTER TO MASTER_HOST='master2.example.com',MASTER_PORT=3306"]
'''
import os
import warnings
from ansible.module_utils.basic import AnsibleModule
from ansible_collections.community.general.plugins.module_utils.mysql import mysql_connect, mysql_driver, mysql_driver_fail_msg
from ansible.module_utils._text import to_native
executed_queries = []
def get_master_status(cursor):
cursor.execute("SHOW MASTER STATUS")
masterstatus = cursor.fetchone()
return masterstatus
def get_slave_status(cursor, connection_name='', channel=''):
if connection_name:
query = "SHOW SLAVE '%s' STATUS" % connection_name
else:
query = "SHOW SLAVE STATUS"
if channel:
query += " FOR CHANNEL '%s'" % channel
cursor.execute(query)
slavestatus = cursor.fetchone()
return slavestatus
def stop_slave(module, cursor, connection_name='', channel='', fail_on_error=False):
if connection_name:
query = "STOP SLAVE '%s'" % connection_name
else:
query = 'STOP SLAVE'
if channel:
query += " FOR CHANNEL '%s'" % channel
try:
executed_queries.append(query)
cursor.execute(query)
stopped = True
except mysql_driver.Warning as e:
stopped = False
except Exception as e:
if fail_on_error:
module.fail_json(msg="STOP SLAVE failed: %s" % to_native(e))
stopped = False
return stopped
def reset_slave(module, cursor, connection_name='', channel='', fail_on_error=False):
if connection_name:
query = "RESET SLAVE '%s'" % connection_name
else:
query = 'RESET SLAVE'
if channel:
query += " FOR CHANNEL '%s'" % channel
try:
executed_queries.append(query)
cursor.execute(query)
reset = True
except mysql_driver.Warning as e:
reset = False
except Exception as e:
if fail_on_error:
module.fail_json(msg="RESET SLAVE failed: %s" % to_native(e))
reset = False
return reset
def reset_slave_all(module, cursor, connection_name='', channel='', fail_on_error=False):
if connection_name:
query = "RESET SLAVE '%s' ALL" % connection_name
else:
query = 'RESET SLAVE ALL'
if channel:
query += " FOR CHANNEL '%s'" % channel
try:
executed_queries.append(query)
cursor.execute(query)
reset = True
except mysql_driver.Warning as e:
reset = False
except Exception as e:
if fail_on_error:
module.fail_json(msg="RESET SLAVE ALL failed: %s" % to_native(e))
reset = False
return reset
def reset_master(module, cursor, fail_on_error=False):
query = 'RESET MASTER'
try:
executed_queries.append(query)
cursor.execute(query)
reset = True
except mysql_driver.Warning as e:
reset = False
except Exception as e:
if fail_on_error:
module.fail_json(msg="RESET MASTER failed: %s" % to_native(e))
reset = False
return reset
def start_slave(module, cursor, connection_name='', channel='', fail_on_error=False):
if connection_name:
query = "START SLAVE '%s'" % connection_name
else:
query = 'START SLAVE'
if channel:
query += " FOR CHANNEL '%s'" % channel
try:
executed_queries.append(query)
cursor.execute(query)
started = True
except mysql_driver.Warning as e:
started = False
except Exception as e:
if fail_on_error:
module.fail_json(msg="START SLAVE failed: %s" % to_native(e))
started = False
return started
def changemaster(cursor, chm, connection_name='', channel=''):
if connection_name:
query = "CHANGE MASTER '%s' TO %s" % (connection_name, ','.join(chm))
else:
query = 'CHANGE MASTER TO %s' % ','.join(chm)
if channel:
query += " FOR CHANNEL '%s'" % channel
executed_queries.append(query)
cursor.execute(query)
def main():
module = AnsibleModule(
argument_spec=dict(
login_user=dict(type='str'),
login_password=dict(type='str', no_log=True),
login_host=dict(type='str', default='localhost'),
login_port=dict(type='int', default=3306),
login_unix_socket=dict(type='str'),
mode=dict(type='str', default='getslave', choices=[
'getmaster', 'getslave', 'changemaster', 'stopslave',
'startslave', 'resetmaster', 'resetslave', 'resetslaveall']),
master_auto_position=dict(type='bool', default=False),
master_host=dict(type='str'),
master_user=dict(type='str'),
master_password=dict(type='str', no_log=True),
master_port=dict(type='int'),
master_connect_retry=dict(type='int'),
master_log_file=dict(type='str'),
master_log_pos=dict(type='int'),
relay_log_file=dict(type='str'),
relay_log_pos=dict(type='int'),
master_ssl=dict(type='bool', default=False),
master_ssl_ca=dict(type='str'),
master_ssl_capath=dict(type='str'),
master_ssl_cert=dict(type='str'),
master_ssl_key=dict(type='str'),
master_ssl_cipher=dict(type='str'),
connect_timeout=dict(type='int', default=30),
config_file=dict(type='path', default='~/.my.cnf'),
client_cert=dict(type='path', aliases=['ssl_cert']),
client_key=dict(type='path', aliases=['ssl_key']),
ca_cert=dict(type='path', aliases=['ssl_ca']),
master_use_gtid=dict(type='str', choices=['current_pos', 'slave_pos', 'disabled']),
master_delay=dict(type='int'),
connection_name=dict(type='str'),
channel=dict(type='str'),
fail_on_error=dict(type='bool', default=False),
),
mutually_exclusive=[
['connection_name', 'channel']
],
)
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["client_cert"]
ssl_key = module.params["client_key"]
ssl_ca = module.params["ca_cert"]
connect_timeout = module.params['connect_timeout']
config_file = module.params['config_file']
master_delay = module.params['master_delay']
if module.params.get("master_use_gtid") == 'disabled':
master_use_gtid = 'no'
else:
master_use_gtid = module.params["master_use_gtid"]
connection_name = module.params["connection_name"]
channel = module.params['channel']
fail_on_error = module.params['fail_on_error']
if mysql_driver is None:
module.fail_json(msg=mysql_driver_fail_msg)
else:
warnings.filterwarnings('error', category=mysql_driver.Warning)
login_password = module.params["login_password"]
login_user = module.params["login_user"]
try:
cursor, db_conn = mysql_connect(module, login_user, login_password, config_file,
ssl_cert, ssl_key, ssl_ca, None, cursor_class='DictCursor',
connect_timeout=connect_timeout)
except Exception as 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, to_native(e)))
else:
module.fail_json(msg="unable to find %s. Exception message: %s" % (config_file, to_native(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(queries=executed_queries, **status)
elif mode in "getslave":
status = get_slave_status(cursor, connection_name, channel)
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(queries=executed_queries, **status)
elif mode in "changemaster":
chm = []
result = {}
if master_host is not None:
chm.append("MASTER_HOST='%s'" % master_host)
if master_user is not None:
chm.append("MASTER_USER='%s'" % master_user)
if master_password is not None:
chm.append("MASTER_PASSWORD='%s'" % master_password)
if master_port is not None:
chm.append("MASTER_PORT=%s" % master_port)
if master_connect_retry is not None:
chm.append("MASTER_CONNECT_RETRY=%s" % master_connect_retry)
if master_log_file is not None:
chm.append("MASTER_LOG_FILE='%s'" % master_log_file)
if master_log_pos is not None:
chm.append("MASTER_LOG_POS=%s" % master_log_pos)
if master_delay is not None:
chm.append("MASTER_DELAY=%s" % master_delay)
if relay_log_file is not None:
chm.append("RELAY_LOG_FILE='%s'" % relay_log_file)
if relay_log_pos is not None:
chm.append("RELAY_LOG_POS=%s" % relay_log_pos)
if master_ssl:
chm.append("MASTER_SSL=1")
if master_ssl_ca is not None:
chm.append("MASTER_SSL_CA='%s'" % master_ssl_ca)
if master_ssl_capath is not None:
chm.append("MASTER_SSL_CAPATH='%s'" % master_ssl_capath)
if master_ssl_cert is not None:
chm.append("MASTER_SSL_CERT='%s'" % master_ssl_cert)
if master_ssl_key is not None:
chm.append("MASTER_SSL_KEY='%s'" % master_ssl_key)
if master_ssl_cipher is not None:
chm.append("MASTER_SSL_CIPHER='%s'" % master_ssl_cipher)
if master_auto_position:
chm.append("MASTER_AUTO_POSITION=1")
if master_use_gtid is not None:
chm.append("MASTER_USE_GTID=%s" % master_use_gtid)
try:
changemaster(cursor, chm, connection_name, channel)
except mysql_driver.Warning as e:
result['warning'] = to_native(e)
except Exception as e:
module.fail_json(msg='%s. Query == CHANGE MASTER TO %s' % (to_native(e), chm))
result['changed'] = True
module.exit_json(queries=executed_queries, **result)
elif mode in "startslave":
started = start_slave(module, cursor, connection_name, channel, fail_on_error)
if started is True:
module.exit_json(msg="Slave started ", changed=True, queries=executed_queries)
else:
module.exit_json(msg="Slave already started (Or cannot be started)", changed=False, queries=executed_queries)
elif mode in "stopslave":
stopped = stop_slave(module, cursor, connection_name, channel, fail_on_error)
if stopped is True:
module.exit_json(msg="Slave stopped", changed=True, queries=executed_queries)
else:
module.exit_json(msg="Slave already stopped", changed=False, queries=executed_queries)
elif mode in "resetmaster":
reset = reset_master(module, cursor, fail_on_error)
if reset is True:
module.exit_json(msg="Master reset", changed=True, queries=executed_queries)
else:
module.exit_json(msg="Master already reset", changed=False, queries=executed_queries)
elif mode in "resetslave":
reset = reset_slave(module, cursor, connection_name, channel, fail_on_error)
if reset is True:
module.exit_json(msg="Slave reset", changed=True, queries=executed_queries)
else:
module.exit_json(msg="Slave already reset", changed=False, queries=executed_queries)
elif mode in "resetslaveall":
reset = reset_slave_all(module, cursor, connection_name, channel, fail_on_error)
if reset is True:
module.exit_json(msg="Slave reset", changed=True, queries=executed_queries)
else:
module.exit_json(msg="Slave already reset", changed=False, queries=executed_queries)
warnings.simplefilter("ignore")
if __name__ == '__main__':
main()