几点说明:(mysql初始化)
a. canal的原理是基于mysql binlog技术,所以这里一定需要开启mysql的binlog写入功能,建议配置binlog模式为row.
针对阿里云RDS账号默认已经有binlog dump权限,不需要任何权限或者binlog设置,可以直接跳过这一步
b. canal的原理是模拟自己为mysql slave,所以这里一定需要做为mysql slave的相关权限.
- [mysqld]
- log-bin=mysql-bin #添加这一行就ok
- binlog-format=ROW #选择row模式
- server_id=1 #配置mysql replaction需要定义,不能和canal的slaveId重复
- CREATE USER canal IDENTIFIED BY 'canal';
- GRANT SELECT, REPLICATION SLAVE, REPLICATION CLIENT ON *.* TO 'canal'@'%';
- -- GRANT ALL PRIVILEGES ON *.* TO 'canal'@'%' ;
- FLUSH PRIVILEGES;
针对已有的账户可直接通过grant
其他场景的使用
- 基于canal的docker模式快速启动,参考:Docker QuickStart
- 如何将canal链接aliyun rds,参考:Aliyun RDS QuickStart
启动步骤:
- 下载canal
直接下载
访问:https://github.com/alibaba/canal/releases ,会列出所有历史的发布版本包下载方式,比如以1.0.17版本为例子:
- wget https://github.com/alibaba/canal/releases/download/canal-1.0.17/canal.deployer-1.0.17.tar.gz
or
自己编译
- git clone git@github.com:alibaba/canal.git
- cd canal;
- mvn clean install -Dmaven.test.skip -Denv=release
编译完成后,会在根目录下产生target/canal.deployer-$version.tar.gz
- 解压缩
- mkdir /tmp/canal
- tar zxvf canal.deployer-$version.tar.gz -C /tmp/canal
解压完成后,进入/tmp/canal目录,可以看到如下结构:
- drwxr-xr-x 2 jianghang jianghang 136 2013-02-05 21:51 bin
- drwxr-xr-x 4 jianghang jianghang 160 2013-02-05 21:51 conf
- drwxr-xr-x 2 jianghang jianghang 1.3K 2013-02-05 21:51 lib
- drwxr-xr-x 2 jianghang jianghang 48 2013-02-05 21:29 logs
- 配置修改
应用参数:
- vi conf/example/instance.properties
- #################################################
- ## mysql serverId
- canal.instance.mysql.slaveId = 1234
- #position info,需要改成自己的数据库信息
- canal.instance.master.address = 127.0.0.1:3306
- canal.instance.master.journal.name =
- canal.instance.master.position =
- canal.instance.master.timestamp =
- #canal.instance.standby.address =
- #canal.instance.standby.journal.name =
- #canal.instance.standby.position =
- #canal.instance.standby.timestamp =
- #username/password,需要改成自己的数据库信息
- canal.instance.dbUsername = canal
- canal.instance.dbPassword = canal
- canal.instance.defaultDatabaseName =
- canal.instance.connectionCharset = UTF-8
- #table regex
- canal.instance.filter.regex = ._\.._
- #################################################
说明:
- canal.instance.connectionCharset 代表数据库的编码方式对应到java中的编码类型,比如UTF-8,GBK , ISO-8859-1
- 准备启动
- sh bin/startup.sh
- 查看日志
- vi logs/canal/canal.log
- 2013-02-05 22:45:27.967 [main] INFO com.alibaba.otter.canal.deployer.CanalLauncher - ## start the canal server.
- 2013-02-05 22:45:28.113 [main] INFO com.alibaba.otter.canal.deployer.CanalController - ## start the canal server[10.1.29.120:11111]
- 2013-02-05 22:45:28.210 [main] INFO com.alibaba.otter.canal.deployer.CanalLauncher - ## the canal server is running now ......
具体instance的日志:
- vi logs/example/example.log
- 2013-02-05 22:50:45.636 [main] INFO c.a.o.c.i.spring.support.PropertyPlaceholderConfigurer - Loading properties file from class path resource [canal.properties]
- 2013-02-05 22:50:45.641 [main] INFO c.a.o.c.i.spring.support.PropertyPlaceholderConfigurer - Loading properties file from class path resource [example/instance.properties]
- 2013-02-05 22:50:45.803 [main] INFO c.a.otter.canal.instance.spring.CanalInstanceWithSpring - start CannalInstance for 1-example
- 2013-02-05 22:50:45.810 [main] INFO c.a.otter.canal.instance.spring.CanalInstanceWithSpring - start successful....
- 关闭
- sh bin/stop.sh
it's over.