离线安装Flink，使用Flink SQL同步数据。_flink离线拿到sqlserver数据-优快云博客

文章介绍了如何利用FlinkSQL结合MySQL的变更数据捕获(CDC)功能从mysqlA的表AA同步数据到mysqlB的表BA。过程中涉及了配置Flink环境、启用MySQL的GTID模式、设置checkpoint间隔以及创建源表和目标表的FlinkSQL语句，最终实现了通过JDBC写入mysqlB的过渡表dw_orders来完成数据同步。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

前情提要

同步mysqlA中表AA 至 mysqlB中表BA，此处读采用mysql-cdc，写采用JDBC

资源准备

下载相应jar包
- flink-sql-connector-mysql-cdc-2.3.0.jar
- flink-connector-jdbc_2.12-1.14.6.jar
- mysql-connector-java-8.0.30.jar
  将下载好的包，复制到flink-1.16.1/lib

数据库开启GTID

找到my.cnf，在[mysqld]中加入如下信息

[mysqld]
……
server-id=1
log-bin=mysql-bin
binlog-format=row
gtid-mode=ON
enforce-gtid-consistency=true
log-slave-updates=ON

准备数据

mysqlA中信息

CREATE DATABASE test_db;
USE test_db;
CREATE TABLE orders (
  order_id INTEGER NOT NULL AUTO_INCREMENT PRIMARY KEY,
  order_date DATETIME NOT NULL,
  customer_name VARCHAR(255) NOT NULL,
  price DECIMAL(10, 5) NOT NULL,
  product_id INTEGER NOT NULL,
  order_status BOOLEAN NOT NULL -- Whether order has been placed
) AUTO_INCREMENT = 10001;

INSERT INTO orders
VALUES (default, '2020-07-30 10:08:22', 'Jark', 50.50, 102, false),
       (default, '2020-07-30 10:11:09', 'Sally', 15.00, 105, false),
       (default, '2020-07-30 12:00:30', 'Edward', 25.25, 106, false);

mysqlB中信息

CREATE DATABASE test_dw;
USE test_dw;
CREATE TABLE orders (
  order_id INTEGER NOT NULL AUTO_INCREMENT PRIMARY KEY,
  order_date DATETIME NOT NULL,
  customer_name VARCHAR(255) NOT NULL,
  price DECIMAL(10, 5) NOT NULL,
  product_id INTEGER NOT NULL,
  order_status BOOLEAN NOT NULL -- Whether order has been placed
)

离线安装Flink 文档

安装java 11

# mac 安装 java11
$  brew install java11
$  sudo ln -sfn /usr/local/opt/openjdk@11/libexec/openjdk.jdk /Library/Java/JavaVirtualMachines/openjdk-11.jdk
$  java -version
openjdk version "11.0.16.1" 2022-08-12
OpenJDK Runtime Environment Homebrew (build 11.0.16.1+0)
OpenJDK 64-Bit Server VM Homebrew (build 11.0.16.1+0, mixed mode)

下载 release 1.16.1 并解压

$ tar -xzf flink-1.16.1-bin-scala_2.12.tgz
$ cd flink-1.16.1

启动集群

$ cd flink-1.16.1
# 启动集群
$ ./bin/start-cluster.sh
# 停止
$ ./bin/stop-cluster.sh

启动集群之后访问：http://localhost:8081/即可看到web UI

使用Fink SQL，零代码实现同步

启动 Fink SQL

$ cd flink-1.16.1
$ ./bin/sql-client.sh

                                   ▒▓██▓██▒
                               ▓████▒▒█▓▒▓███▓▒
                            ▓███▓░░        ▒▒▒▓██▒  ▒
                          ░██▒   ▒▒▓▓█▓▓▒░      ▒████
                          ██▒         ░▒▓███▒    ▒█▒█▒
                            ░▓█            ███   ▓░▒██
                              ▓█       ▒▒▒▒▒▓██▓░▒░▓▓█
                            █░ █   ▒▒░       ███▓▓█ ▒█▒▒▒
                            ████░   ▒▓█▓      ██▒▒▒ ▓███▒
                         ░▒█▓▓██       ▓█▒    ▓█▒▓██▓ ░█░
                   ▓░▒▓████▒ ██         ▒█    █▓░▒█▒░▒█▒
                  ███▓░██▓  ▓█           █   █▓ ▒▓█▓▓█▒
                ░██▓  ░█░            █  █▒ ▒█████▓▒ ██▓░▒
               ███░ ░ █░          ▓ ░█ █████▒░░    ░█░▓  ▓░
              ██▓█ ▒▒▓▒          ▓███████▓░       ▒█▒ ▒▓ ▓██▓
           ▒██▓ ▓█ █▓█       ░▒█████▓▓▒░         ██▒▒  █ ▒  ▓█▒
           ▓█▓  ▓█ ██▓ ░▓▓▓▓▓▓▓▒              ▒██▓           ░█▒
           ▓█    █ ▓███▓▒░              ░▓▓▓███▓          ░▒░ ▓█
           ██▓    ██▒    ░▒▓▓███▓▓▓▓▓██████▓▒            ▓███  █
          ▓███▒ ███   ░▓▓▒░░   ░▓████▓░                  ░▒▓▒  █▓
          █▓▒▒▓▓██  ░▒▒░░░▒▒▒▒▓██▓░                            █▓
          ██ ▓░▒█   ▓▓▓▓▒░░  ▒█▓       ▒▓▓██▓    ▓▒          ▒▒▓
          ▓█▓ ▓▒█  █▓░  ░▒▓▓██▒            ░▓█▒   ▒▒▒░▒▒▓█████▒
           ██░ ▓█▒█▒  ▒▓▓▒  ▓█                █░      ░░░░   ░█▒
           ▓█   ▒█▓   ░     █░                ▒█              █▓
            █▓   ██         █░                 ▓▓        ▒█▓▓▓▒█░
             █▓ ░▓██░       ▓▒                  ▓█▓▒░░░▒▓█░    ▒█
              ██   ▓█▓░      ▒                    ░▒█▒██▒      ▓▓
               ▓█▒   ▒█▓▒░                         ▒▒ █▒█▓▒▒░░▒██
                ░██▒    ▒▓▓▒                     ▓██▓▒█▒ ░▓▓▓▓▒█▓
                  ░▓██▒                          ▓░  ▒█▓█  ░░▒▒▒
                      ▒▓▓▓▓▓▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒░░▓▓  ▓░▒█░

    ______ _ _       _       _____  ____  _         _____ _ _            _  BETA
   |  ____| (_)     | |     / ____|/ __ \| |       / ____| (_)          | |
   | |__  | |_ _ __ | | __ | (___ | |  | | |      | |    | |_  ___ _ __ | |_
   |  __| | | | '_ \| |/ /  \___ \| |  | | |      | |    | | |/ _ \ '_ \| __|
   | |    | | | | | |   <   ____) | |__| | |____  | |____| | |  __/ | | | |_
   |_|    |_|_|_| |_|_|\_\ |_____/ \___\_\______|  \_____|_|_|\___|_| |_|\__|

        Welcome! Enter 'HELP;' to list all available commands. 'QUIT;' to exit.

Command history file path: /Users/zhangkai/.flink-sql-history

Flink SQL>

设置checkpoint

# 每隔3秒做一次 checkpoint 生产建议5-10分钟
Flink SQL> SET execution.checkpointing.interval = 3s;

使用 Flink SQL CLI 创建对应的表，用于同步这些底层数据库表的数据

# 读取mysqlA中信息
CREATE TABLE orders (
   order_id INT,
   order_date TIMESTAMP(0),
   customer_name STRING,
   price DECIMAL(10, 5),
   product_id INT,
   order_status BOOLEAN,
   PRIMARY KEY (order_id) NOT ENFORCED
 ) WITH (
   'connector' = 'mysql-cdc',
   'hostname' = 'localhost',
   'port' = '3306',
   'username' = 'root',
   'password' = 'secret',
   'database-name' = 'test_db',
   'table-name' = 'orders'
 );

创建 dw_orders 表，用来将关联后的订单数据写入 mysqlB 中

# 用于写入mysqlB 的过度表
CREATE TABLE dw_orders (
   order_id INT,
   order_date TIMESTAMP(0),
   customer_name STRING,
   price DECIMAL(10, 5),
   product_id INT,
   order_status BOOLEAN,
   PRIMARY KEY (order_id) NOT ENFORCED
 ) WITH (
   'connector' = 'jdbc',
   'url' = 'jdbc:mysql://localhost:3306/test_dw',
   'username' = 'root',
   'password' = 'secret',
   'table-name' = 'orders'
 );

执行写入 mysqlB 中

INSERT INTO dw_orders SELECT * FROM orders;

至此，test_db.orders 增删改都会同步至 test_dw.orders中
总的来说就是

mysql-cdc 读取mysqlA中信息，jdbc 过度写入mysqlB中。