Seatunnel MYSQL数据同步

• Seatunnel MYSQL数据同步

  • 数据库表

#source库
CREATE TABLE IF NOT EXISTS `student`(
   `id` INT UNSIGNED AUTO_INCREMENT,
   `name` VARCHAR(100) NOT NULL,
   `age` int unsigned,
   `gender` char(8) NOT NULL,
   PRIMARY KEY ( `id` )
)ENGINE=InnoDB DEFAULT CHARSET=utf8;


CREATE TABLE IF NOT EXISTS `score`(
   `id` INT UNSIGNED AUTO_INCREMENT,
   `subject` VARCHAR(100) NOT NULL,
   `score` int unsigned NOT NULL,
   `user_id` int unsigned NOT NULL,
   PRIMARY KEY ( `id` )
)ENGINE=InnoDB DEFAULT CHARSET=utf8;


#sink库
CREATE TABLE IF NOT EXISTS `accomplishment`(
   `id` INT UNSIGNED AUTO_INCREMENT,
   `name` VARCHAR(100),
   `subject` VARCHAR(100),
   `score` int unsigned,
   PRIMARY KEY ( `id` )
)ENGINE=InnoDB DEFAULT CHARSET=utf8;

• Batch同步

# Defining the runtime environment
env {
  # You can set flink configuration here
  execution.parallelism = 1
  job.mode = "BATCH"
}
source{
  Jdbc {
    url = "jdbc:mysql://mysql:3306/test"
    driver = "com.mysql.cj.jdbc.Driver"
    connection_check_timeout_sec = 100
    user = "root"
    password = "123456"
    query = "SELECT a.name, b.subject, b.score from student a, score b where a.id = b.user_id"
  }
}

transform {
    # If you would like to get more information about how to configure seatunnel and see full list of transform plugins,
    # please go to https://seatunnel.apache.org/docs/transform-v2/sql
}

sink {
#    Console {}
  jdbc {
    url = "jdbc:mysql://mysql:3306/test2"
    driver = "com.mysql.cj.jdbc.Driver"
    user = "root"
    password = "123456"
    query = "insert into accomplishment(name, subject, score) values(?,?,?)"
  }
}

• 临时启动一个容器

  • docker run --name seatunnel --hostname seatunnel-node1 --network my-net -e config="/data/seatunnel.batch.conf" -v /mnt/sda1/seatunnel/apache-seatunnel-2.3.3/config/batch_conf:/data/seatunnel.batch.conf -v /mnt/sda1/seatunnel/apache-seatunnel-2.3.3/config/plugin_config:/opt/seatunnel/plugin_config -v /mnt/sda1/seatunnel/apache-seatunnel-2.3.3/lib:/opt/seatunnel/lib -v /mnt/sda1/seatunnel/apache-seatunnel-2.3.3/plugins:/opt/seatunnel/plugins -v /mnt/sda1/seatunnel/apache-seatunnel-2.3.3/connectors/seatunnel:/opt/seatunnel/connectors/seatunnel -v /etc/localtime:/etc/localtime seatunnel:2.3.3

• MySQL-CDC 多表实时同步 insert, update

env {
   # You can set SeaTunnel environment configuration here
   execution.parallelism = 1
   job.mode = "STREAMING"
   # 10秒检查一次，可以适当加大这个值
   checkpoint.interval = 10000
   #execution.checkpoint.interval = 10000
   #execution.checkpoint.data-uri = "hdfs://localhost:9000/checkpoint"
 }

 # 配置数据源
 source {
   MySQL-CDC {
     result_table_name = "student"
     # 数据库账号
     username = "root"
     password = "123456"
     # 源表，格式：数据库名.表名
     table-names = ["test.student"]
     base-url = "jdbc:mysql://mysql:3306/test"
   }
   MySQL-CDC {
     result_table_name = "score"
     # 数据库账号
     username = "root"
     password = "123456"
     # 源表，格式：数据库名.表名
     table-names = ["test.score"]
     base-url = "jdbc:mysql://mysql:3306/test"
   }
 }

 transform {
  Sql {
    source_table_name = "student"
    result_table_name = "student1"
    query = "select id, name from student where id>0"
  }
  Sql {
    source_table_name = "score"
    result_table_name = "score1"
    query = "select subject, score, user_id as id from score where id>0"
  }
}

 # 配置目标库
 sink {

   jdbc {
     url = "jdbc:mysql://mysql:3306/test2"
     driver = "com.mysql.cj.jdbc.Driver"
     user = "root"
     password = "123456"

     generate_sink_sql = true
             # 目标数据库名
     database = "test2"
     # 目标表名
     table = "accomplishment"
     # 主键名称
     primary_keys = ["id"]
     source_table_name = "student1"
   }

   jdbc {
    url = "jdbc:mysql://mysql:3306/test2"
    driver = "com.mysql.cj.jdbc.Driver"
    user = "root"
    password = "123456"
    query = "update accomplishment set subject = ?,score = ? where id = ?"
    source_table_name = "score1"
   }

 }

• 临时启动一个容器

• • docker run --name seatunnel --hostname seatunnel-node1 --network my-net -e config="/data/seatunnel.streaming.conf" -v /mnt/sda1/seatunnel/apache-seatunnel-2.3.3/config/streaming_conf:/data/seatunnel.streaming.conf -v /mnt/sda1/seatunnel/apache-seatunnel-2.3.3/config/plugin_config:/opt/seatunnel/plugin_config -v /mnt/sda1/seatunnel/apache-seatunnel-2.3.3/lib:/opt/seatunnel/lib -v /mnt/sda1/seatunnel/apache-seatunnel-2.3.3/plugins:/opt/seatunnel/plugins -v /mnt/sda1/seatunnel/apache-seatunnel-2.3.3/connectors/seatunnel:/opt/seatunnel/connectors/seatunnel -v /etc/localtime:/etc/localtime seatunnel:2.3.3

• No checkpoint found for job异常，启动之后会创建该目录，并且该目录下的文件一直在更新，保留最近的几个文件 .ser文件

  • 266369) needed jar urls [file:/opt/seatunnel/lib/seatunnel-transforms-v2.jar, file:/opt/seatunnel/connectors/seatunnel/connector-cdc-mysql-2.3.3.jar, file:/opt/seatunnel/plugins/jdbc/lib/mysql-connector-j-8.0.33.jar]
  • 2023-10-26 06:10:04,454 WARN org.apache.hadoop.util.NativeCodeLoader - Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
  • 2023-10-26 06:10:04,624 INFO org.apache.seatunnel.engine.checkpoint.storage.hdfs.HdfsStorage - Path /tmp/seatunnel/checkpoint_snapshot/769804951374266369 is not a directory
  • 2023-10-26 06:10:04,624 INFO org.apache.seatunnel.engine.checkpoint.storage.hdfs.HdfsStorage - No checkpoint found for job, job id is: 769804951374266369
  • 2023-10-26 06:10:04,629 INFO org.apache.seatunnel.engine.checkpoint.storage.hdfs.HdfsStorage - Path /tmp/seatunnel/checkpoint_snapshot/769804951374266369 is not a directory
  • 2023-10-26 06:10:04,629 INFO org.apache.seatunnel.engine.checkpoint.storage.hdfs.HdfsStorage - No checkpoint found for job, job id is: 769804951374266369