flink同步mysql数据表到pg库
1.关闭防火墙和selinux
systemctl stop firewalld
systemctl disable firewalld
systemctl status firewalld
vi /etc/selinux/config
修改为disabled
2.安装java8
yum list java-1.8* yum install java-1.8.0-openjdk* -yjava -version
3.下载和部署postgresql
下载地址：http://www.postgresql.org/ftp/source/
我安装的最新版本，可以看需求安装pg库版本
上传到服务器
tar -zxvf postgresql-16.2.tar.gz
./configure
如果出现以下报错解决方法：
yum -y install gcc
如果出现以下错误解决方法：
yum -y install libicu libicu-devel libunwind readline-devel zlib-devel
make
make install
useradd postgres
groupadd postgres
useradd -g postgres postgres
id postgrescd /usr/local/pgsql/
mkdir data
chown postgres:postgres datacd /home/postgres/
ll -al
vi .bash_profile
添加
export PGHOME=/usr/local/pgsql/
export PGDATA=/usr/local/pgsql/data
PATH=$PATH:$HOME/bin:$PGHOME/bin
source .bash_profile
su postgres
initdb
cd /usr/local/pgsql/data/
vi postgresql.conf
修改为listen_addresses = '*'
启动pg库
pg_ctl -D /usr/local/pgsql/data -l logfile start
service postgresql start
su – postgres
psql
4.下载和部署mysql
yum -y install wget
wget https://dev.mysql.com/get/Downloads/MySQL-8.0/mysql-8.0.28-linux-glibc2.12-x86_64.tar.xz
mv mysql-8.0.28-linux-glibc2.12-x86_64.tar.xz /usr/local/
cd /usr/local/
tar xvJf mysql-8.0.28-linux-glibc2.12-x86_64.tar.xzmv mysql-8.0.28-linux-glibc2.12-x86_64 mysql-8.0
mkdir data
groupadd mysql
chown -R mysql.mysql /usr/local/mysql-8.0
cd mysql-8.0/bin/
mkdir data
./mysqld --user=mysql --basedir=/usr/local/mysql-8.0 --datadir=/usr/local/mysql-8.0/data/ --initialize
圈起来的部分为后面数据库登陆的初始密码
vi /etc/my.cnf
basedir=/usr/local/mysql-8.0/
datadir=/usr/local/mysql-8.0/data/
socket=/tmp/mysql.sock
character-set-server=UTF8MB4
cp -a .././support-files/mysql.server /etc/init.d/mysql
chmod +x /etc/init.d/mysql
chkconfig --add mysql
service mysql status
service mysql start
ln -s /usr/local/mysql-8.0/bin/mysql /usr/bin
登陆
mysql -u root -p
输入向前初始化给的初始密码
修改mysql密码
登陆
5.下载部署flink
flink下载地址：https://www.apache.org/dyn/closer.lua/flink/flink-1.18.1/flink-1.18.1-bin-scala_2.12.tgz
下载flink sql所需驱动
1. flink-connector-jdbc-3.1.1-1.17.jar 下载地址：https://repo1.maven.org/maven2/org/apache/flink/flink-connector-jdbc/3.1.1-1.17/
2. flink-sql-connector-mysql-cdc-3.0.1.jar 下载地址：https://github.com/ververica/flink-cdc-connectors/releases
3. flink-sql-connector-postgres-cdc-3.0.1.jar 下载地址：https://mvnrepository.com/artifact/com.ververica/flink-sql-connector-postgres-cdc/3.0.1
4. mysql-connector-java-8.0.28.jar 下载地址：https://repo.maven.apache.org/maven2/mysql/mysql-connector-java/8.0.28/
上传flink压缩包并解压
tar -zxvf flink-1.18.1-bin-scala_2.12.tgz
进入flink的lib目录上传四个依赖
cd flink-1.18.1/lib/
需要修改一下flink配置文件
不然会出现以下情况
vi flink-1.18.1/conf/flink-conf.yaml
原本是localhost修改为ip
./flink-1.18.1/bin/start-cluster.sh
访问 192.168.207.193:8081 （默认是8081端口 可在配置文件里修改）
6.实时同步mysql数据到postgresql
数据库先创建一个库,在库里创建表再添加数据
create database ljq;use ljqCREATE TABLE players (
player_id INT NOT NULL AUTO_INCREMENT,
team_id INT,
player_name VARCHAR(255),
height FLOAT(53),
PRIMARY KEY (player_id)
);;insert into players (player_id,team_id,player_name,height) values
(1001,1001,'韦德','1.93'),
(1002,1002,'雷吉','1.91'),
(1003,1003,'安德烈','2.11'),
(1004,1004,'索恩','2.16'),
(1005,1005,'兰斯顿','1.88'),
(1006,1006,'格伦','1.98'),
(1007,1007,'伊斯梅尔','1.83'),
(1008,1008,'扎扎','2.11'),
(1009,1009,'乔恩','2.08');select * from players;
在pg库创建一个库,在库里创建一个表不插入数据
create database ljq;
\c ljqCREATE TABLE players3 (
player_id INT NOT NULL,
team_id INT,
player_name VARCHAR(255),
height FLOAT(53),
PRIMARY KEY (player_id)
);
启动flink-sql
./flink-1.18.1/bin/sql-client.sh embedded
根据需要同步的数据创建源表
CREATE TABLE nbaplayers (
player_id INT,
team_id INT,
player_name VARCHAR,
height FLOAT,
PRIMARY KEY (player_id) NOT ENFORCED
) WITH (
'connector' = 'mysql-cdc',
'hostname' = '192.168.207.193',
'port' = '3306',
'username' = 'root',
'password' = 'linux123',
'database-name' = 'ljq',
'table-name' = 'players',
'server-time-zone' = 'Asia/Shanghai'
);
查看表时出现报错！ 
解决方法：修改为允许所有ip访问
use mysql;
select user,host from user;
update user set host = '%' where user = 'root';
flush privileges;
select user,host from user;
重新查看表
select * from nbaplayers;·
创建结果表
CREATE TABLE nba (
player_id INT,
team_id INT,
player_name VARCHAR,
height NUMERIC(3,2),
PRIMARY KEY (player_id) NOT ENFORCED
) WITH (
'connector' = 'jdbc',
'url' = 'jdbc:postgresql://192.168.207.193:5432/ljq??currentSchema=public&reWriteBatchedInserts=true',
'username' = 'postgres',
'password' = 'linux123',
'table-name' = 'players3'
);
执行从源表插入结果表操作，生成同步作业
INSERT INTO nba
SELECT
player_id,
team_id,
player_name,
height
FROM nbaplayers;
Web端查看
查看是否同步数据到pg库的players3表
测试一下增删改是否同步
1.增
mysql执行
insert into players (player_id,team_id,player_name,height) values (10001,10002,'韦德2','1.95');
pg库查看
2.删
mysql执行
delete from players where player_id = 10001;
pg库查看
3.改
mysql执行
update players set player_name='高大的姚明' where player_id=1001;
pg库查看
注：字符串小数点精确问题
