MySQL到Doris的StreamingETL实现（Flink CDC 3.0）

1 环境准备

1）安装FlinkCDC

shell 复制代码

[root@hadoop1 software]$ tar -zxvf flink-cdc-3.0.0-bin.tar.gz -C /opt/module/

2）拖入MySQL以及Doris依赖包

将flink-cdc-pipeline-connector-doris-3.0.0.jar以及flink-cdc-pipeline-connector-mysql-3.0.0.jar防止在FlinkCDC的lib目录下

2 同步变更

2）编写MySQL到Doris的同步变更配置文件

在FlinkCDC目录下创建job文件夹，并在该目录下创建同步变更配置文件

shell 复制代码

[root@hadoop1 flink-cdc-3.0.0]$ mkdir job/

[root@hadoop1 flink-cdc-3.0.0]$ cd job

[root@hadoop1 job]$ vim mysql-to-doris.yaml

 

source:

 type: mysql

 hostname: hadoop3

 port: 3306

 username: root

 password: "123456"

 tables: test.\.

 server-id: 5400-5404

 server-time-zone: UTC+8

 

sink:

 type: doris

 fenodes: hadoop1:7030

 username: root

 password: "123456"

 table.create.properties.light_schema_change: true

 table.create.properties.replication_num: 1

 

pipeline:

 name: Sync MySQL Database to Doris

 parallelism: 1

3）启动任务并测试

（1）开启Flink集群，注意：在Flink配置信息中打开CheckPoint

shell 复制代码

[root@hadoop3 flink-1.18.0]$ vim conf/flink-conf.yaml

添加如下配置信息

shell 复制代码

execution.checkpointing.interval: 5000

分发该文件至其他Flink机器并启动Flink集群

shell 复制代码

[root@hadoop3 flink-1.18.0]$ bin/start-cluster.sh

（2）开启Doris FE

shell 复制代码

[root@hadoop1 fe]$ bin/start_fe.sh

（3）开启Doris BE

shell 复制代码

[root@hadoop1 be]$ bin/start_be.sh

（4）在Doris中创建test数据库

shell 复制代码

[root@hadoop3 doris]$ mysql -uroot -p123456 -P9030 -hhadoop1

mysql: [Warning] Using a password on the command line interface can be insecure.

Welcome to the MySQL monitor.  Commands end with ; or g.

Your MySQL connection id is 0

Server version: 5.7.99 Doris version doris-1.2.4-1-Unknown

 

Copyright (c) 2000, 2022, Oracle and/or its affiliates.

 

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

 

Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.

 

mysql> create database test;

Query OK, 1 row affected (0.00 sec)

 

mysql> create database doris_test_route;

Query OK, 1 row affected (0.00 sec)

（5）启动FlinkCDC同步变更任务

shell 复制代码

[root@hadoop3 flink-cdc-3.0.0]$ bin/flink-cdc.sh job/mysql-to-doris.yaml

（6）刷新Doris中test数据库观察结果

（7）在MySQL的test数据中对应的几张表进行新增、修改数据以及新增列操作，并刷新Doris中test数据库观察结果

3 路由变更

1）编写MySQL到Doris的路由变更配置文件

shell 复制代码

source:

 type: mysql

 hostname: hadoop3

 port: 3306

 username: root

 password: "123456"

 tables: test_route.\.

 server-id: 5400-5404

 server-time-zone: UTC+8

 

sink:

 type: doris

 fenodes: hadoop1:7030

 benodes: hadoop1:7040

 username: root

 password: "123456"

 table.create.properties.light_schema_change: true

 table.create.properties.replication_num: 1

 

route:

 - source-table: test_route.t1

  sink-table: doris_test_route.doris_t1

 - source-table: test_route.t2

  sink-table: doris_test_route.doris_t1

 - source-table: test_route.t3

  sink-table: doris_test_route.doris_t3

 

pipeline:

 name: Sync MySQL Database to Doris

 parallelism: 1

2）启动任务并测试

she 复制代码

[root@hadoop3 flink-cdc-3.0.0]$ bin/flink-cdc.sh job/mysql-to-doris-route.yaml

3）刷新Doris中test_route数据库观察结果

4）在MySQL的test_route数据中对应的几张表进行新增、修改数据操作，并刷新Doris中doris_test_route数据库观察结果