基于 Dinky + FlinkSQL + Flink CDC 同步 MySQL 数据到 Elasticsearch、Kafka

only°夏至besos2025-12-25 8:46

一、概述

Dinky是一个开箱即用的一站式实时计算平台以 Apache Flink 为基础，连接 OLAP 和数据湖等众多框架致力于流批一体和湖仓一体的建设与实践。本文以此为FlinkSQL可视化工具。

Flink SQL使得使用标准 SQL 开发流式应用变得简单，免去代码开发。

Flink CDC 本文使用 MySQL CDC 连接器 允许从 MySQL 数据库读取快照数据和增量数据。

环境及主要软件版本说明

二、软件安装部署

本文全部采用单机最简环境。

复制代码 
tar -xzf flink-1.14.6-bin-scala_2.12.tgz
cd flink-1.14.6 && ls -l
### 修改配置 flink-1.14.6/conf/flink-conf.yaml,修改成本机的IP、位置
jobmanager.rpc.address: 192.168.xxx.xxx
taskmanager.host: 192.168.xxx.xxx
jobmanager.memory.process.size: 2048m
taskmanager.memory.process.size: 2048m
taskmanager.numberOfTaskSlots: 10
rest.port: 8888
rest.address: 0.0.0.0
web.tmpdir: /home/soft/flink_/flink-1.14.6/tmp
akka.ask.timeout: 600s
### 将flink-sql-connector-kafka_2.12-1.14.6.jar、flink-sql-connector-elasticsearch7_2.12-1.14.6.jar、
### flink-sql-connector-mysql-cdc-2.3.0.jar、放到flink-1.14.6/lib/ 下
### 启动
./

启动成功后，即可访问Flink UI 可视化界面 http://192.168.xxx.xxx:8888/

2.Kafka

复制代码 
tar -xzf kafka_2.12-3.4.0.tgz
cd kafka_2.12-3.4.0
bin/ random-uuid > uuid
vi config/kraft/server.properties
controller.quorum.voters=1@192.168.XXX.XXX:9093
advertised.listeners=PLAINTEXT://192.168.XXX.XXX:9092
log.dirs=/home/soft/kafka_2.12-3.4.0/kraft-combined-logs
### 使用前面生成的uuid格式化Kafka日志目录
bin/ format -t `cat uuid` -c config/kraft/server.properties
Formatting /home/soft/kafka_2.12-3.4.0/kraft-combined-logs with metadata.version 3.4-IV0.

### Start the Kafka Server
bin/ -daemon config/kraft/server.properties
### Kafka 服务器成功启动后，您将拥有一个正在运行并可以使用的基本 Kafka 环境。
jps -l
14085 kafka.Kafka
#### 启动命令说明###############################################################
### 1、前台启动命令:
### bin/ config/server.properties
### 描述：
### 此种方式是窗口运行。一旦窗口关闭或者执行了CTR+C，那么kafka进程就被kill了，kafka服务端就被关闭了
### 2、后台启动命令：
### (1) nohup bin/ config/server.properties 2>&1 &
### (2)bin/ -daemon config/server.properties

3.Dinky

部署参考：http://www.dlink.top/docs/next/deploy_guide/build

  1. 数据库初始化

    复制代码 
     #登录mysql
 mysql -uroot -p123456
 #创建数据库
 mysql>
 create database dinky;
 #授权
 mysql>
 grant all privileges on dinky.* to 'dinky'@'%' identified by 'dinky@123' with grant option;
 mysql>
 flush privileges;
 #此处用 dinky 用户登录
 mysql -h fdw1 -udinky -pdinky@123
 mysql>
 use dinky;
 # sql文件在下载的压缩包中获取即可
 mysql> source /home/soft/dinky/sql/dinky.sql

  2. Dinky部署

    tar -zxvf dlink-release-0.7.3.tar.gz
    mv dlink-release-0.7.3.tar.gz dinky
    #切换目录,修改数据库配置及端口信息
    cd /home/soft/dinky/config/
    vi application.yml

    -------------------------------------------------------------------------------

    spring:
    datasource:
    url: jdbc:mysql://{MYSQL_ADDR:192.168.XXX.XXX:3306}/{MYSQL_DATABASE:dinky}?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true&useSSL=false&zeroDateTimeBehavior=convertToNull&serverTime
    zone=Asia/Shanghai&allowPublicKeyRetrieval=true
    username: {MYSQL_USERNAME:dinky} password: {MYSQL_PASSWORD:dinky@123}
    server:
    port: 8899

    -------------------------------------------------------------------------------

    加载依赖Dinky 需要具备自身的 Flink 环境，该 Flink 环境的实现需要用户自己在 Dinky 根目录下

    plugins/flink${FLINK_VERSION} 文件夹并上传相关的 Flink 依赖，如 flink-dist, flink-table 等

    复制代码 
     cp ${FLINK_HOME}/lib/flink-*.jar  /home/soft/dinky/plugins/flink1.14/

    包含如下的jar

    flink-csv-1.14.6.jar
    flink-dist_2.12-1.14.6.jar
    flink-json-1.14.6.jar
    flink-shaded-zookeeper-3.4.14.jar
    flink-sql-connector-elasticsearch7_2.12-1.14.6.jar
    flink-sql-connector-kafka_2.12-1.14.6.jar
    flink-sql-connector-mysql-cdc-2.3.0.jar

    完成后启动

    sh auto.sh start 1.14

启动完成后访问 http://192.168.XXX.XXX:8899/ 通过admin/admin即可登录进系统进行可视化操作。

三、任务创建提交

场景说明：目前 MySQL 中有四张表，t1、t2、t3、t4。需要将 t1、t2 关联查询后结果同步到 Elasticsearch 索引 search01_index，t3、t4 关联查询后结果也同步到Elasticsearch索引 search01_index。Elasticsearch 索引信息是通过Spring Elasticsearch Data 项目启动时自动生成好了。只需要将数据同步即可。另外推送 Kafka 供给其他源处理。

Flink SQL和数据库字段类型对照说明：https://nightlies.apache.org/flink/flink-docs-release-1.14/docs/connectors/table/jdbc/#data-type-mapping

MySQL 同步到 Elasticsearch
复制代码 
### 进入flink/bin 目录下，通过 ./ 命令启动sql客户端工具                 
Flink SQL> SET execution.checkpointing.interval = 3s;

### source 1
Flink SQL> CREATE TABLE IF NOT EXISTS test1 (
    id STRING,
    name STRING,
    del_flag TINYINT,
    PRIMARY KEY (id) NOT ENFORCED
) WITH (
    'connector' = 'mysql-cdc',
    'hostname' = '192.168.XXX.XXX',
    'port' = '3306',
    'username' = 'root',
    'password' = '123456',
    'database-name' = 'test1的schame',
    'table-name' = 'test1'
);

### source 2
Flink SQL> CREATE TABLE IF NOT EXISTS test2 (
    id   STRING,
    doc_id STRING,
    event_detail STRING,
    country STRING,
    `time` STRING,
    entity_type STRING,
    entity_name STRING,
    type TINYINT,
    del_flag TINYINT,
    PRIMARY KEY (id) NOT ENFORCED
) WITH (
    'connector' = 'mysql-cdc',
    'hostname' = '192.168.XXX.XXX',
    'port' = '3306',
    'username' = 'root',
    'password' = '123456',
    'database-name' = 'test2的schame',
    'table-name' = 'test2'
);

### source 3
Flink SQL>CREATE TABLE IF NOT EXISTS test3 (
    id STRING,
    title STRING,
    type TINYINT,
    del_flag TINYINT,
    PRIMARY KEY (id) NOT ENFORCED
) WITH (
    'connector' = 'mysql-cdc',
    'hostname' = '192.168.XXX.XXX',
    'port' = '3306',
    'username' = 'root',
    'password' = '123456',
    'database-name' = 'test3的schame',
    'table-name' = 'test3'
);

### source 4
Flink SQL>CREATE TABLE IF NOT EXISTS test4 (
     id STRING,
     `time` STRING,
     country STRING,
     entity_type STRING,
     entity_name STRING,
     detail STRING,
     fo_id STRING,
     del_flag TINYINT,
     PRIMARY KEY (id) NOT ENFORCED
) WITH (
    'connector' = 'mysql-cdc',
    'hostname' = '192.168.XXX.XXX',
    'port' = '3306',
    'username' = 'root',
    'password' = '123456',
    'database-name' = 'test4的schame',
    'table-name' = 'test4'
);

### sink
Flink SQL>CREATE TABLE IF NOT EXISTS search01_index (
    id           STRING,
    name         STRING,
    eventDetail STRING,
    country      STRING,
    `time`       STRING,
    entityType  STRING,
    entityName  STRING,
    type         TINYINT,
    PRIMARY KEY (id) NOT ENFORCED
) WITH (
    'connector' = 'elasticsearch-7',
    'hosts' = 'http://192.168.XXX.XXX:9200',
    'index' = 'search01_index',
    'sink.bulk-flush.max-actions' = '1'
);

### transform 1 ，防止进同一个索引时表 t1 和 t3 的 ID 相同，将 ID 进行拼接处理。
Flink SQL>INSERT INTO search01_index
    SELECT CONCAT('doc_', , '_', ) AS id,
    ,
    t2.event_detail                   AS eventDetail,
    t2.country,
    t2.`time`,
    t2.entity_type                    AS entityType,
    t2.entity_name                    AS entityName,
    t2.type
    FROM test1 t1
    LEFT JOIN test2 t2 ON  = t2.doc_id
    WHERE t1.del_flag = 0
    AND t2.del_flag = 0;
    
### transform 2 ，防止进同一个索引时表 t1 和 t3 的 ID 相同，将 ID 进行拼接处理。
Flink SQL>INSERT INTO search01_index
    SELECT CONCAT('fo_', , '_', ) AS id,
    t3.title                         AS name,
    t4.detail                        AS eventDetail,
    t4.country,
    t4.`time`,
    t4.entity_type                   AS entityType,
    t4.entity_name                   AS entityName,
    t3.type
    FROM test3 t3
    LEFT JOIN test4 t4 ON  = t4.fo_id
    WHERE t3.del_flag = 0
    AND t4.del_flag = 0;

执行完成后访问Flink UI http://192.168.XXX.XXX:8888/#/job/running 可以看到正在运行的

Running Jobs，然后对MySQL 表数据进行增删改操作，可以看到 Elasticsearch 中数据同步效果。

MySQL 同步到 Kafka
复制代码 
### 进入flink/bin 目录下，通过 ./ 命令启动sql客户端工具                 
Flink SQL> SET execution.checkpointing.interval = 3s;

### source 1
Flink SQL> CREATE TABLE IF NOT EXISTS test1 (
    id STRING,
    name STRING,
    del_flag TINYINT,
    PRIMARY KEY (id) NOT ENFORCED
) WITH (
    'connector' = 'mysql-cdc',
    'hostname' = '192.168.XXX.XXX',
    'port' = '3306',
    'username' = 'root',
    'password' = '123456',
    'database-name' = 'test1的schame',
    'table-name' = 'test1'
);

### source 2
Flink SQL> CREATE TABLE IF NOT EXISTS test2 (
    id   STRING,
    doc_id STRING,
    event_detail STRING,
    country STRING,
    `time` STRING,
    entity_type STRING,
    entity_name STRING,
    type TINYINT,
    del_flag TINYINT,
    PRIMARY KEY (id) NOT ENFORCED
) WITH (
    'connector' = 'mysql-cdc',
    'hostname' = '192.168.XXX.XXX',
    'port' = '3306',
    'username' = 'root',
    'password' = '123456',
    'database-name' = 'test2的schame',
    'table-name' = 'test2'
);

### source 3
Flink SQL>CREATE TABLE IF NOT EXISTS test3 (
    id STRING,
    title STRING,
    type TINYINT,
    del_flag TINYINT,
    PRIMARY KEY (id) NOT ENFORCED
) WITH (
    'connector' = 'mysql-cdc',
    'hostname' = '192.168.XXX.XXX',
    'port' = '3306',
    'username' = 'root',
    'password' = '123456',
    'database-name' = 'test3的schame',
    'table-name' = 'test3'
);

### source 4
Flink SQL>CREATE TABLE IF NOT EXISTS test4 (
     id STRING,
     `time` STRING,
     country STRING,
     entity_type STRING,
     entity_name STRING,
     detail STRING,
     fo_id STRING,
     del_flag TINYINT,
     PRIMARY KEY (id) NOT ENFORCED
) WITH (
    'connector' = 'mysql-cdc',
    'hostname' = '192.168.XXX.XXX',
    'port' = '3306',
    'username' = 'root',
    'password' = '123456',
    'database-name' = 'test4的schame',
    'table-name' = 'test4'
);

### sink
Flink SQL>CREATE TABLE IF NOT EXISTS test_kakfa (
    id           STRING,
    name         STRING,
    eventDetail STRING,
    country      STRING,
    `time`       STRING,
    entityType  STRING,
    entityName  STRING,
    type         TINYINT,
    PRIMARY KEY (id) NOT ENFORCED
) WITH (
    'connector' = 'kafka',
    'topic' = 'test_kakfa',
    'properties.bootstrap.servers' = '192.168.XXX.XXX:9092',
    '' = 'testGroup',
    'scan.startup.mode' = 'earliest-offset',
    'format' = 'debezium-json',
    'debezium-json.ignore-parse-errors'='true'
);

### transform 1 ，防止进同一个索引时表 t1 和 t3 的 ID 相同，将 ID 进行拼接处理。
Flink SQL>INSERT INTO test_kakfa
    SELECT CONCAT('doc_', , '_', ) AS id,
    ,
    t2.event_detail                   AS eventDetail,
    t2.country,
    t2.`time`,
    t2.entity_type                    AS entityType,
    t2.entity_name                    AS entityName,
    t2.type
    FROM test1 t1
    LEFT JOIN test2 t2 ON  = t2.doc_id
    WHERE t1.del_flag = 0
    AND t2.del_flag = 0;
    
### transform 2 ，防止进同一个索引时表 t1 和 t3 的 ID 相同，将 ID 进行拼接处理。
Flink SQL>INSERT INTO test_kakfa
    SELECT CONCAT('fo_', , '_', ) AS id,
    t3.title                         AS name,
    t4.detail                        AS eventDetail,
    t4.country,
    t4.`time`,
    t4.entity_type                   AS entityType,
    t4.entity_name                   AS entityName,
    t3.type
    FROM test3 t3
    LEFT JOIN test4 t4 ON  = t4.fo_id
    WHERE t3.del_flag = 0
    AND t4.del_flag = 0;

执行完成后访问 Kafka-map UI 可以看到数据已经进入Kafka，数据格式为：

复制代码 
{"before":null,"after":{"id":"fo_48_50","name":"标题啊","eventDetail":"内容2","country":"日本","time":"2023-06-01","entityType":"实体2","entityName":"名称2","type":3},"op":"c"}

2. 通过 Dinky 方式

登录Dinky可视化界面后选择【注册中心】菜单添加flink的环境

然后选择【数据开发】菜单配置SQL任务

  • mysql2kafka-1 内容

    复制代码 
    CREATE TABLE IF NOT EXISTS test1 (
    id STRING,
    name STRING,
    del_flag TINYINT,
    PRIMARY KEY (id) NOT ENFORCED
) WITH (
    'connector' = 'mysql-cdc',
    'hostname' = '192.168.XXX.XXX',
    'port' = '3306',
    'username' = 'root',
    'password' = '123456',
    'database-name' = 'test1的schame',
    'table-name' = 'test1'
);
 CREATE TABLE IF NOT EXISTS test2 (
    id   STRING,
    doc_id STRING,
    event_detail STRING,
    country STRING,
    `time` STRING,
    entity_type STRING,
    entity_name STRING,
    type TINYINT,
    del_flag TINYINT,
    PRIMARY KEY (id) NOT ENFORCED
) WITH (
    'connector' = 'mysql-cdc',
    'hostname' = '192.168.XXX.XXX',
    'port' = '3306',
    'username' = 'root',
    'password' = '123456',
    'database-name' = 'test2的schame',
    'table-name' = 'test2'
);

CREATE TABLE IF NOT EXISTS test_kakfa (
    id           STRING,
    name         STRING,
    eventDetail STRING,
    country      STRING,
    `time`       STRING,
    entityType  STRING,
    entityName  STRING,
    type         TINYINT,
    PRIMARY KEY (id) NOT ENFORCED
) WITH (
    'connector' = 'kafka',
    'topic' = 'test_kakfa',
    'properties.bootstrap.servers' = '192.168.XXX.XXX:9092',
    '' = 'testGroup',
    'scan.startup.mode' = 'earliest-offset',
    'format' = 'debezium-json',
    'debezium-json.ignore-parse-errors'='true'
);
INSERT INTO test_kakfa
SELECT CONCAT('doc_', , '_', ) AS id,
    ,
    t2.event_detail                   AS eventDetail,
    t2.country,
    t2.`time`,
    t2.entity_type                    AS entityType,
    t2.entity_name                    AS entityName,
    t2.type
FROM test1 t1
LEFT JOIN test2 t2 ON  = t2.doc_id
WHERE t1.del_flag = 0
AND t2.del_flag = 0;

  • mysql2kafka-2 内容

    复制代码 
    CREATE TABLE IF NOT EXISTS test3 (
    id STRING,
    title STRING,
    type TINYINT,
    del_flag TINYINT,
    PRIMARY KEY (id) NOT ENFORCED
) WITH (
    'connector' = 'mysql-cdc',
    'hostname' = '192.168.XXX.XXX',
    'port' = '3306',
    'username' = 'root',
    'password' = '123456',
    'database-name' = 'test3的schame',
    'table-name' = 'test3'
);
CREATE TABLE IF NOT EXISTS test4 (
     id STRING,
     `time` STRING,
     country STRING,
     entity_type STRING,
     entity_name STRING,
     detail STRING,
     fo_id STRING,
     del_flag TINYINT,
     PRIMARY KEY (id) NOT ENFORCED
) WITH (
    'connector' = 'mysql-cdc',
    'hostname' = '192.168.XXX.XXX',
    'port' = '3306',
    'username' = 'root',
    'password' = '123456',
    'database-name' = 'test4的schame',
    'table-name' = 'test4'
);
CREATE TABLE IF NOT EXISTS test_kakfa (
    id           STRING,
    name         STRING,
    eventDetail STRING,
    country      STRING,
    `time`       STRING,
    entityType  STRING,
    entityName  STRING,
    type         TINYINT,
    PRIMARY KEY (id) NOT ENFORCED
) WITH (
    'connector' = 'kafka',
    'topic' = 'test_kakfa',
    'properties.bootstrap.servers' = '192.168.6.36:9092',
    '' = 'testGroup',
    'scan.startup.mode' = 'earliest-offset',
    'format' = 'debezium-json',
    'debezium-json.ignore-parse-errors'='true'
);
INSERT INTO test_kakfa
SELECT CONCAT('fo_', , '_', ) AS id,
    t3.title                         AS name,
    t4.detail                        AS eventDetail,
    t4.country,
    t4.`time`,
    t4.entity_type                   AS entityType,
    t4.entity_name                   AS entityName,
    t3.type
FROM test3 t3
LEFT JOIN test4 t4 ON  = t4.fo_id
WHERE t3.del_flag = 0
AND t4.del_flag = 0;

  • mysql2es-1 内容

    复制代码 
    CREATE TABLE IF NOT EXISTS test1 (
    id STRING,
    name STRING,
    del_flag TINYINT,
    PRIMARY KEY (id) NOT ENFORCED
) WITH (
    'connector' = 'mysql-cdc',
    'hostname' = '192.168.XXX.XXX',
    'port' = '3306',
    'username' = 'root',
    'password' = '123456',
    'database-name' = 'test1的schame',
    'table-name' = 'test1'
);
 CREATE TABLE IF NOT EXISTS test2 (
    id   STRING,
    doc_id STRING,
    event_detail STRING,
    country STRING,
    `time` STRING,
    entity_type STRING,
    entity_name STRING,
    type TINYINT,
    del_flag TINYINT,
    PRIMARY KEY (id) NOT ENFORCED
) WITH (
    'connector' = 'mysql-cdc',
    'hostname' = '192.168.XXX.XXX',
    'port' = '3306',
    'username' = 'root',
    'password' = '123456',
    'database-name' = 'test2的schame',
    'table-name' = 'test2'
);
CREATE TABLE IF NOT EXISTS search01_index (
    id           STRING,
    name         STRING,
    eventDetail STRING,
    country      STRING,
    `time`       STRING,
    entityType  STRING,
    entityName  STRING,
    type         TINYINT,
    PRIMARY KEY (id) NOT ENFORCED
) WITH (
    'connector' = 'elasticsearch-7',
    'hosts' = 'http://192.168.XXX.XXX:9200',
    'index' = 'search01_index',
    'sink.bulk-flush.max-actions' = '1'
);
INSERT INTO search01_index
SELECT CONCAT('doc_', , '_', ) AS id,
    ,
    t2.event_detail                   AS eventDetail,
    t2.country,
    t2.`time`,
    t2.entity_type                    AS entityType,
    t2.entity_name                    AS entityName,
    t2.type
FROM test1 t1
LEFT JOIN test2 t2 ON  = t2.doc_id
WHERE t1.del_flag = 0
AND t2.del_flag = 0;

  • mysql2es-2 内容

    复制代码 
    CREATE TABLE IF NOT EXISTS test3 (
    id STRING,
    title STRING,
    type TINYINT,
    del_flag TINYINT,
    PRIMARY KEY (id) NOT ENFORCED
) WITH (
    'connector' = 'mysql-cdc',
    'hostname' = '192.168.XXX.XXX',
    'port' = '3306',
    'username' = 'root',
    'password' = '123456',
    'database-name' = 'test3的schame',
    'table-name' = 'test3'
);
CREATE TABLE IF NOT EXISTS test4 (
     id STRING,
     `time` STRING,
     country STRING,
     entity_type STRING,
     entity_name STRING,
     detail STRING,
     fo_id STRING,
     del_flag TINYINT,
     PRIMARY KEY (id) NOT ENFORCED
) WITH (
    'connector' = 'mysql-cdc',
    'hostname' = '192.168.XXX.XXX',
    'port' = '3306',
    'username' = 'root',
    'password' = '123456',
    'database-name' = 'test4的schame',
    'table-name' = 'test4'
);
CREATE TABLE IF NOT EXISTS search01_index (
    id           STRING,
    name         STRING,
    eventDetail STRING,
    country      STRING,
    `time`       STRING,
    entityType  STRING,
    entityName  STRING,
    type         TINYINT,
    PRIMARY KEY (id) NOT ENFORCED
) WITH (
    'connector' = 'elasticsearch-7',
    'hosts' = 'http://192.168.XXX.XXX:9200',
    'index' = 'search01_index',
    'sink.bulk-flush.max-actions' = '1'
);
INSERT INTO search01_index
SELECT CONCAT('fo_', , '_', ) AS id,
    t3.title                         AS name,
    t4.detail                        AS eventDetail,
    t4.country,
    t4.`time`,
    t4.entity_type                   AS entityType,
    t4.entity_name                   AS entityName,
    t3.type
FROM test3 t3
LEFT JOIN test4 t4 ON  = t4.fo_id
WHERE t3.del_flag = 0
AND t4.del_flag = 0;
  • 分别点击任务运行后，查看Flink UI
  • 查看Kafka-map
  • 查看Elasticsearch Head 插件

至此就大功告成了。

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