一 ：flinkcdc官网链接。

https://ververica.github.io/flink-cdc-connectors/release-2.1/content/about.html

二：在flink中添加jar包。

在flink lib目录下增加你所需要的包。

https://kdocs.cn/join/gv467qi?f=101
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三：申请资源。

cd /opt/app/flink/flink-1.13.6/bin
yarn-session.sh  -s 1 -jm 1024m -tm 1024m -nm test_cdc -d
yarn application -list

四：配置dlink。

五：编写代码。

set execution.checkpointing.interval=30s;
set state.checkpoints.dir=hdfs://cluster/flink/mysql_es1;
set state.savepoints.dir=hdfs://cluster/flink/mysql_es1;



CREATE TABLE `mobile_device`( 
`id` int, 
`user_id` string, 
`app_id` string, 
`group_id` string, 
`app_version` string, 
`sdk_version` string, 
`mobile` string, 
`brand` string, 
`model_identifier` string, 
`model` string, 
`system` string, 
`device_id` string, 
`secret_key` string, 
`pkd` string, 
`access_token` string, 
`refresh_token`string, 
`iot_device_secret` string, 
`status` int, 
`expiration_timeout` timestamp, 
`login_type` int, 
`create_time` timestamp, 
`update_time` timestamp, 
PRIMARY KEY (id) NOT ENFORCED
) WITH (
 'connector' = 'mysql-cdc',
 'hostname' = 'xx.xx.xx.xx',
 'port' = '3306',
 'username' = 'xxxx',
 'password' = 'xxxxx',
 'database-name' = 'xx',
 'table-name' = 'xxxx'
);


select * from mobile_device;

注意：大小写会影响数据的读取。

六：查看具体的任务。