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**
只是记录
软件版本cananl1.0.24,mysql在5.7.21 5.6.38测试通过
[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
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.
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
启动步骤：
1. 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-$version.tar.gz
2. 解压缩
mkdir /tmp/canal
tar zxvf canal.deployer-$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
3. 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
注释：多个客户端的处理方式：
vi canal.properties
######### destinations #############
#################################################
canal.destinations= example,test
# conf root dir
canal.conf.dir = ../conf
# auto scan instance dir add/remove and start/stop instance
canal.auto.scan = true
canal.auto.scan.interval = 5
4. 准备启动
sh bin/startup.sh
5. 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....
6. 关闭
sh bin/stop.sh
it's over.
