Doris通过Flink CDC接入MySQL实战

1. 创建MySQL库表，写入demo数据

1. 登录测试MySQL

 mysql -u root -pnew_password

2. 创建MySQL库表，写入demo数据

CREATE DATABASE emp_1;
 USE emp_1;
CREATE TABLE employees_1 (
    emp_no      INT             NOT NULL,
    birth_date  DATE            NOT NULL,
    first_name  VARCHAR(14)     NOT NULL,
    last_name   VARCHAR(16)     NOT NULL,
    gender      ENUM ('M','F')  NOT NULL,    
    hire_date   DATE            NOT NULL,
    PRIMARY KEY (emp_no)
);

INSERT INTO `employees_1` VALUES (10001,'1953-09-02','Georgi','Facello','M','1986-06-26'),
(10002,'1964-06-02','Bezalel','Simmel','F','1985-11-21'),
(10036,'1959-08-10','Adamantios','Portugali','M','1992-01-03');

注意：MySQL需要开通bin-log

• log_bin=mysql_bin
• binlog-format=Row
• server-id=1

2. 创建Doris库表

1. 创建Doris表

mysql -uroot -P9030 -h127.0.0.1
create database demo;
use demo;
CREATE TABLE all_employees_info (
    emp_no       int NOT NULL,
    birth_date   date,
    first_name   varchar(20),
    last_name    varchar(20),
    gender       char(2),
    hire_date    date
)
UNIQUE KEY(`emp_no`, `birth_date`)
DISTRIBUTED BY HASH(`birth_date`) BUCKETS 1
PROPERTIES (
"replication_allocation" = "tag.location.default: 1"
);

3. 启动Flink

1. 启动flink

cd /mnt/apps/flink-1.15.3/ 
#启动flink，这里服务已经启动
bin/start-cluster.sh 
#进入SQL控制台
bin/sql-client.sh embedded

2. 创建Flink 任务：

SET 'execution.checkpointing.interval' = '10s';

CREATE TABLE employees_source (
    database_name STRING METADATA VIRTUAL,
    table_name STRING METADATA VIRTUAL,
    emp_no int NOT NULL,
    birth_date date,
    first_name STRING,
    last_name STRING,
    gender STRING,
    hire_date date,
    PRIMARY KEY (`emp_no`) NOT ENFORCED
  ) WITH (
    'connector' = 'mysql-cdc',
    'hostname' = 'localhost',
    'port' = '3306',
    'username' = 'root',
    'password' = 'new_password',
    'database-name' = 'emp_1',
    'table-name' = 'employees_1'
  );

CREATE TABLE cdc_doris_sink (
    emp_no       int ,
    birth_date   STRING,
    first_name   STRING,
    last_name    STRING,
    gender       STRING,
    hire_date    STRING
) 
WITH (
  'connector' = 'doris',
  'fenodes' = '172.16.64.9:8030',
  'table.identifier' = 'demo.all_employees_info',
  'username' = 'root',
  'password' = '',
  'sink.properties.two_phase_commit'='true',
  'sink.label-prefix'='doris_demo_emp_002'
);

insert into cdc_doris_sink (emp_no,birth_date,first_name,last_name,gender,hire_date) 
select emp_no,cast(birth_date as string) as birth_date ,first_name,last_name,gender,cast(hire_date as string) as hire_date  from employees_source;

3. 输入如下地址，查看flink任务
   http://localhost:8081/#/job/running

4. 数据验证：启动后可以看到有数据实时进入Doris了

mysql -uroot -P9030 -h127.0.0.1
mysql> select * from all_employees_info;
+--------+------------+------------+-----------+--------+------------+
| emp_no | birth_date | first_name | last_name | gender | hire_date  |
+--------+------------+------------+-----------+--------+------------+
|  10001 | 1953-09-02 | Georgi     | Facello   | M      | 1986-06-26 |
|  10002 | 1964-06-02 | Bezalel    | Simmel    | F      | 1985-11-21 |
|  10036 | 1959-08-10 | Adamantios | Portugali | M      | 1992-01-03 |
|  20001 | 1953-09-02 | Georgi     | Facello   | M      | 1986-06-26 |
+--------+------------+------------+-----------+--------+------------+
4 rows in set (0.02 sec)

Link

• https://zhuanlan.zhihu.com/p/532913664
• https://www.runoob.com/mysql/mysql-install.html
• https://repo.maven.apache.org/maven2/org/apache/doris/flink-doris-connector-1.15/1.2.1/
• https://repo1.maven.org/maven2/com/ververica/flink-sql-connector-mysql-cdc/2.2.1/

Jar包地址：

flink 环境：1.15.3

• https://dlcdn.apache.org/flink/flink-1.15.3/flink-1.15.3-bin-scala_2.12.tgz
  解压并将jar包防止在Flink 的lib下
  flink-doris-connector：1.15
• https://repo.maven.apache.org/maven2/org/apache/doris/flink-doris-connector-1.15/1.2.1/flink-doris-connector-1.15-1.2.1.jar
  cdc mysql：flink-sql-connector-mysql-cdc-2.2.1.jar
• https://repo1.maven.org/maven2/com/ververica/flink-sql-connector-mysql-cdc/2.2.1/flink-sql-connector-mysql-cdc-2.2.1.jar