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canal同步mysql数据

admin

11月 28, 2021

整体架构图:

canal.depoyer端配置

 1、mysql开启 Binlog 写入功能,配置 binlog-format 为 ROW 模式,my.cnf 中配置如下

[mysqld]
log-bin=mysql-bin # 开启 binlog
binlog-format=ROW # 选择 ROW 模式
server_id=1 # 配置 MySQL replaction 需要定义,不要和 canal 的 slaveId 重复

2、授权 canal 链接 MySQL 账号具有作为 MySQL slave 的权限, 如果已有账户可直接 grant

CREATE USER canal IDENTIFIED BY 'canal';  
GRANT SELECT, REPLICATION SLAVE, REPLICATION CLIENT ON *.* TO 'canal'@'%';
-- GRANT ALL PRIVILEGES ON *.* TO 'canal'@'%' ;
FLUSH PRIVILEGES;

3、配置canal.deployer  将canal server接收到的binlog数据直接投递到MQ

参考文档:https://github.com/alibaba/canal/wiki/Canal-Kafka-RocketMQ-QuickStart

下载 https://github.com/alibaba/canal/releases/download/canal-1.1.5/canal.deployer-1.1.5.tar.gz 

解压canal.deployer-1.1.5.tar.gz 后结构如下:

a、修改canal 配置文件   conf/canal.properties

# tcp, kafka, rocketMQ, rabbitMQ
canal.serverMode = kafka
..........
##################################################
#########                    Kafka                   #############
##################################################
kafka.bootstrap.servers = 127.0.0.1:9092 #修改成实际的kafka地址
kafka.acks = all
kafka.compression.type = none
kafka.batch.size = 16384
kafka.linger.ms = 1
kafka.max.request.size = 1048576
kafka.buffer.memory = 33554432
kafka.max.in.flight.requests.per.connection = 1
kafka.retries = 0

kafka.kerberos.enable = false
kafka.kerberos.krb5.file = "../conf/kerberos/krb5.conf"
kafka.kerberos.jaas.file = "../conf/kerberos/jaas.conf"

b、修改instance 配置文件 conf/example/instance.properties

#  按需修改成自己的数据库信息
#################################################
...
canal.instance.master.address=127.0.0.1:3306
# username/password,数据库的用户名和密码
...
canal.instance.dbUsername = canal
canal.instance.dbPassword = canal
...
#table regex
canal.instance.filter.regex=sam_cms\..* #配置哪个数据库需要同步
  # mq config
  canal.mq.topic=sam_cms
4、启动
sh bin/startup.sh

配置canal.adapter

1、下载 canal.adapter

     https://github.com/alibaba/canal/releases/download/canal-1.1.5/canal.adapter-1.1.5.tar.gz

解压后目录结构

2、配置canal.adapter 接收kafka 消息,把数据同步到mysql

参考文档:https://github.com/alibaba/canal/wiki/ClientAdapter

a、修改 conf/application.yml

canal.conf:
   mode: kafka #tcp kafka rocketMQ rabbitMQ
   consumerProperties:
        # kafka consumer
        kafka.bootstrap.servers: 192.168.0.103:9092 #实际地址
   canalAdapters:
   - instance: sam_cms # canal instance Name or mq topic name
     groups:
     - groupId: g1
       outerAdapters:
       - name: logger
       - name: rdb
         key: mysql1
         properties:
           jdbc.driverClassName: com.mysql.jdbc.Driver
           jdbc.url: jdbc:mysql://127.0.0.1:3306/sam_cms?useUnicode=true
           jdbc.username: root
           jdbc.password: 123456

b、修改配置文件 /conf/rdb/mytest_user.yml

destination: sam_cms #cannal的instance或者MQ的topic
groupId: g1 #对应MQ模式下的groupId, 只会同步对应groupId的数据
outerAdapterKey: mysql1  #adapter key, 对应上面配置outAdapters中的key
concurrent: true #是否按主键hash并行同步, 并行同步的表必须保证主键不会更改及主键不能为其他同步表的外键!!
dbMapping:
 mirrorDb: true
 database: sam_cms #源数据源的database/shcema

3、启动

bin/startup.sh

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