Pure Python Implementation of MySQL replication protocol build on top of PyMYSQL. This allow you to receive event like insert, update, delete with their datas and raw SQL queries.
- MySQL to NoSQL database replication
- MySQL to search engine replication
- Invalidate cache when something change in database
- Audit
- Real time analytics
A work in progress documentation is available here: https://python-mysql-replication.readthedocs.org/en/latest/
Instruction about building documentation is available here: https://python-mysql-replication.readthedocs.org/en/latest/developement.html
pip install mysql-replication
You can get support and discuss about new features on: https://groups.google.com/d/forum/python-mysql-replication
The current project is a proof of concept of what you can do with the MySQL replication log.
The project is test with:
- MySQL 5.5 and 5.6
- Python >= 2.6.7
- Python 3.3 and 3.4 (3.2 is not supported)
It's not tested in real production situation.
https://python-mysql-replication.readthedocs.org/en/latest/limitations.html
- MySQL River Plugin for ElasticSearch: https://github.com/scharron/elasticsearch-river-mysql
- Ditto: MySQL to MemSQL replicator https://github.com/memsql/ditto
- ElasticMage: Full Magento integration with ElasticSearch https://github.com/ElasticMage/elasticmage
- Cache buster: an automatic cache invalidation system https://github.com/rackerlabs/cache-busters
In your MySQL server configuration file you need to enable replication:
[mysqld]
server-id = 1
log_bin = /var/log/mysql/mysql-bin.log
expire_logs_days = 10
max_binlog_size = 100M
binlog-format = row #Very important if you want to receive write, update and delete row events
All examples are available in the examples directory
This example will dump all replication events to the console:
from pymysqlreplication import BinLogStreamReader
mysql_settings = {'host': '127.0.0.1', 'port': 3306, 'user': 'root', 'passwd': ''}
stream = BinLogStreamReader(connection_settings = mysql_settings)
for binlogevent in stream:
binlogevent.dump()
stream.close()For this SQL sessions:
CREATE DATABASE test;
use test;
CREATE TABLE test4 (id int NOT NULL AUTO_INCREMENT, data VARCHAR(255), data2 VARCHAR(255), PRIMARY KEY(id));
INSERT INTO test4 (data,data2) VALUES ("Hello", "World");
UPDATE test4 SET data = "World", data2="Hello" WHERE id = 1;
DELETE FROM test4 WHERE id = 1;Output will be:
=== RotateEvent ===
Date: 1970-01-01T01:00:00
Event size: 24
Read bytes: 0
=== FormatDescriptionEvent ===
Date: 2012-10-07T15:03:06
Event size: 84
Read bytes: 0
=== QueryEvent ===
Date: 2012-10-07T15:03:16
Event size: 64
Read bytes: 64
Schema: test
Execution time: 0
Query: CREATE DATABASE test
=== QueryEvent ===
Date: 2012-10-07T15:03:16
Event size: 151
Read bytes: 151
Schema: test
Execution time: 0
Query: CREATE TABLE test4 (id int NOT NULL AUTO_INCREMENT, data VARCHAR(255), data2 VARCHAR(255), PRIMARY KEY(id))
=== QueryEvent ===
Date: 2012-10-07T15:03:16
Event size: 49
Read bytes: 49
Schema: test
Execution time: 0
Query: BEGIN
=== TableMapEvent ===
Date: 2012-10-07T15:03:16
Event size: 31
Read bytes: 30
Table id: 781
Schema: test
Table: test4
Columns: 3
=== WriteRowsEvent ===
Date: 2012-10-07T15:03:16
Event size: 27
Read bytes: 10
Table: test.test4
Affected columns: 3
Changed rows: 1
Values:
--
* data : Hello
* id : 1
* data2 : World
=== XidEvent ===
Date: 2012-10-07T15:03:16
Event size: 8
Read bytes: 8
Transaction ID: 14097
=== QueryEvent ===
Date: 2012-10-07T15:03:17
Event size: 49
Read bytes: 49
Schema: test
Execution time: 0
Query: BEGIN
=== TableMapEvent ===
Date: 2012-10-07T15:03:17
Event size: 31
Read bytes: 30
Table id: 781
Schema: test
Table: test4
Columns: 3
=== UpdateRowsEvent ===
Date: 2012-10-07T15:03:17
Event size: 45
Read bytes: 11
Table: test.test4
Affected columns: 3
Changed rows: 1
Affected columns: 3
Values:
--
* data : Hello => World
* id : 1 => 1
* data2 : World => Hello
=== XidEvent ===
Date: 2012-10-07T15:03:17
Event size: 8
Read bytes: 8
Transaction ID: 14098
=== QueryEvent ===
Date: 2012-10-07T15:03:17
Event size: 49
Read bytes: 49
Schema: test
Execution time: 1
Query: BEGIN
=== TableMapEvent ===
Date: 2012-10-07T15:03:17
Event size: 31
Read bytes: 30
Table id: 781
Schema: test
Table: test4
Columns: 3
=== DeleteRowsEvent ===
Date: 2012-10-07T15:03:17
Event size: 27
Read bytes: 10
Table: test.test4
Affected columns: 3
Changed rows: 1
Values:
--
* data : World
* id : 1
* data2 : Hello
=== XidEvent ===
Date: 2012-10-07T15:03:17
Event size: 8
Read bytes: 8
Transaction ID: 14099
When it's possible we have an unit test.
More information is available here: https://python-mysql-replication.readthedocs.org/en/latest/developement.html
https://python-mysql-replication.readthedocs.org/en/latest/changelog.html
- Kodoma: Ruby-binlog based MySQL replication listener https://github.com/y310/kodama
- MySQL Hadoop Applier: C++ version http://dev.mysql.com/tech-resources/articles/mysql-hadoop-applier.html
- MySQL binlog from Jeremy Cole was a great source of knowledge about MySQL replication protocol https://github.com/jeremycole/mysql_binlog
- Samuel Charron for his help https://github.com/scharron
Major contributor:
- bjoernhaeuser for his bugs fixing, improvements and community support https://github.com/bjoernhaeuser
Other contributors:
- Dvir Volk for bug fix https://github.com/dvirsky
- Lior Sion code cleanup and improvements https://github.com/liorsion
- Lx Yu code improvements, primary keys detections https://github.com/lxyu
- Young King for pymysql 0.6 support https://github.com/youngking
- David Reid checksum checking fix https://github.com/dreid
- Alex Gaynor fix smallint24 https://github.com/alex
- lifei NotImplementedEvent https://github.com/lifei
- Maralla Python 3.4 fix https://github.com/maralla
- Daniel Gavrila more MySQL error codes https://github.com/danielduduta
- Bernardo Sulzbach code cleanup https://github.com/mafagafo
Copyright 2012-2014 Julien Duponchelle
Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.