MySQL到Doris的StreamingETL实现（Flink CDC 3.0）
1 环境准备
1）安装FlinkCDC
[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
[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
[root@hadoop3 flink-1.18.0]$ vim conf/flink-conf.yaml
添加如下配置信息
execution.checkpointing.interval: 5000
分发该文件至其他Flink机器并启动Flink集群
[root@hadoop3 flink-1.18.0]$ bin/start-cluster.sh
（2）开启Doris FE
[root@hadoop1 fe]$ bin/start_fe.sh
（3）开启Doris BE
[root@hadoop1 be]$ bin/start_be.sh
（4）在Doris中创建test数据库
[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
[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
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
[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
