簡單實現MySQL數據實時增量同步到Kafka————Maxwell

任務需求：將MySQL裏的數據實時增量同步到Kafka

1、準備工作

1.1、MySQL方面：開啓BinLog

1.1.1、修改my.cnf文件

vi /etc/my.cnf
[mysqld]
server-id  = 1
binlog_format = ROW

1.1.2、重啓MySQL,然後登陸到MySQL之後，查看是否已經修改過來:

mysql> show variables like 'binlog_format';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| binlog_format | ROW   |
+---------------+-------+

1.1.3、創建Maxwell用戶，並賦予 maxwell 庫的一些權限

CREATE USER 'maxwell'@'%' IDENTIFIED BY '123456';
GRANT ALL ON maxwell.* TO 'maxwell'@'%';
GRANT SELECT, REPLICATION CLIENT, REPLICATION SLAVE on *.* to 'maxwell'@'%'; 

1.2、Kafka準備工作
1.2.1、啓動Zookeeper

zookeeper-server-start /usr/local/etc/kafka/zookeeper.properties 

1.2.2、啓動kafka

kafka-server-start /usr/local/etc/kafka/server.properties 

2、Maxwell

2.1、下載安裝包
https://github.com/zendesk/maxwell/releases/download/v1.20.0/maxwell-1.20.0.tar.gz
2.2、解壓到指定位置

tar -zxvf maxwell-1.20.0.tar.gz 

2.3、在MYSQL中創建測試用表（前提你要進入一個庫）

CREATE TABLE `test` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `age` int(11) DEFAULT NULL,
  `name` varchar(255) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

2.4、打開Maxwell（要在maxwell安裝目錄下）

bin/maxwell --user=maxwell --password=123456 --host='127.0.0.1' --producer=stdout

2.5、對數據進行操作

insert into test values(1,22,"小明");
update test set name='whirly' where id=1;
delete from test where id=1;

可以看到Maxwell控制檯的輸出，測試成功！

{"database":"test","table":"test","type":"insert","ts":1552153502,"xid":832,"commit":true,"data":{"id":1,"age":22,"name":"小明鋒"}}
{"database":"test","table":"test","type":"update","ts":1552153502,"xid":833,"commit":true,"data":{"id":1,"age":22,"name":"whirly"},"old":{"name":"小明"}}
{"database":"test","table":"test","type":"delete","ts":1552153502,"xid":834,"commit":true,"data":{"id":1,"age":22,"name":"whirly"}}

3、實現MySQL數據實時增量同步到Kafka

3.1、開啓指定到Kafka的MaxWell

bin/maxwell --user='maxwell' --password='123456' --host='127.0.0.1' \
   --producer=kafka --kafka.bootstrap.servers=localhost:9092 --kafka_topic=maxwell --kafka_version=0.10.2.1

3.2、對數據庫進行操作

insert into test values(1,22,"小明");
update test set name='whirly' where id=1;
delete from test where id=1;

3.3、啓動一個消費者來消費 maxwell topic的消息，觀察其輸出；

kafka-console-consumer --bootstrap-server 127.0.0.1:9092 --topic test --from-beginning

3.4、再次執行數據庫結果觀察，仍然可以得到相同的輸出