Dinky实践系列之FlinkCDC整库实时入仓入湖

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发布于 2023-02-26 14:17:45

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发布于 2023-02-26 14:17:45

文章被收录于专栏：DataLink数据中台

摘要：本文介绍了 Dinky 功能实践系列的 Flink CDC 整库实时入仓入湖的分析。内容包括：

前言
环境要求
源库准备
整库同步参数介绍
整库入湖 Hudi
整库入仓 StarRocks
整库入库 MySQL
整库同步 Kafka
整库入库 PostgreSQL
整库入仓 ClickHouse
总结

Tips：历史传送门～

《Dinky FlinkCDC 整库入仓 StarRocks》

《打造 Flink + StarRocks+ Dinky 的极速统一分析平台》

《Dinky 扩展 iceberg 的实践分享》

《Dinky 构建 Flink CDC 整库入仓入湖》

GitHub 地址

https://github.com/DataLinkDC/dlink

https://gitee.com/DataLinkDC/Dinky

欢迎大家关注 Dinky 的发展~

一、前言

Dinky 整库同步发布已经有一段时间，通过阅读本文，您将会熟悉 Dinky 整库同步的用法。为此Dinky 社区准备了整库同步的系列，方便大家快速上手使用。

因业界中 Sink 端的库较多，特意选择了现在比较通用或者流行的库做为演示。并选择了 mysql-cdc做为 Source 端实现整库同步到各 Sink 端。当然通过阅读本文，如果你的 Source 端 oracle-cdc，那么将 mysql-cdc替换即可。

二、环境要求

软件	版本
CDH	6.2.0
Hadoop	3.0.0-cdh6.2.0
Hive	2.1.1-cdh6.2.0
Hudi	0.11.1
Flink	1.13.6
Flink CDC	2.2.1
StarRocks	2.2.0
Dinky	0.6.6-SNAPSHOT
MySQL	5.7
PostgreSQL	13
ClickHouse	22.2.2.1(单机版)

所需依赖

‍ 整库同步需要在 Flink下加载周围组件所需要的 Flink connector 即可。依赖如下：

# hive依赖包
antlr-runtime-3.5.2.jar
hive-exec-2.1.1-cdh6.2.0.jar
libfb303-0.9.3.jar
flink-sql-connector-hive-2.2.0_2.12-1.13.6.jar
hive-site.xml
# hadoop依赖
flink-shaded-hadoop-2-uber-3.0.0-cdh6.3.0-7.0.jar
# Flink Starrrocks依赖
flink-connector-starrocks-1.2.2_flink-1.13_2.12.jar
# Hudi 依赖
hudi-flink1.13-bundle_2.12-0.11.1.jar
# Dinky hadoop依赖
flink-shaded-hadoop-3-uber-3.1.1.7.2.8.0-224-9.0.jar
# Dinky 整库同步依赖包
dlink-client-1.13-0.6.5.jar
dlink-client-base-0.6.5.jar
dlink-common-0.6.5.jar
# flink cdc依赖包
flink-sql-connector-mysql-cdc-2.2.1.jar
# mysql 驱动依赖
mysql-connector-java-8.0.21.jar
# kafka flink依赖
flink-sql-connector-kafka_2.12-1.13.6.jar
# postgresql jdbc依赖
postgresql-42.2.14.jar
# clickhouse 依赖
clickhouse-jdbc-0.2.6.jar
flink-connector-clickhouse-1.13.6.jar

说明

1.Hive 依赖包放置 FLINK_HOME/lib 和 DINKY_HOME/plugins 下

2.Hadoop 依赖包放置 $FLINK_HOME/lib 下

3.Flink Starrrocks 依赖包放置 FLINK_HOME/lib 和DINKY_HOME/plugins 下

4.Hudi 依赖包放置 FLINK_HOME/lib 和 DINKY_HOME/plugins 下

5.Dinky hadoop 依赖包放置 $DINKY_HOME/plugins 下(网盘或者群公告下载)

6.Dinky 整库同步依赖包放置 $FLINK_HOME/lib 下

7.Flink CDC 依赖包放置 FLINK_HOME/lib 和 DINKY_HOME/plugins 下

8.MySQL 驱动依赖放置 FLINK_HOME/lib 和 DINKY_HOME/plugins 下

9.Kafka Flink 依赖 FLINK_HOME/lib 和 DINKY_HOME/plugins 下

10.PostgreSQL jdbc 依赖放置 FLINK_HOME/lib 和DINKY_HOME/plugins 下

11.ClickHouse 依赖放置 FLINK_HOME/lib 和 DINKY_HOME/plugins 下

以上依赖放入后，重启 Flink 集群和 Dinky。如果中间遇到一些jar包冲突，可自行根据报错解决相关冲突的包。

三、源库准备

MySQL 建表

如下sql脚本采用 Flink CDC 官网

# mysql建表语句(同步到Starocks)
CREATE TABLE bigdata.products (
  id INTEGER NOT NULL AUTO_INCREMENT PRIMARY KEY,
  name VARCHAR(255) NOT NULL,
  description VARCHAR(512)
);

ALTER TABLE bigdata.products AUTO_INCREMENT = 101;

INSERT INTO bigdata.products
VALUES (default,"scooter","Small 2-wheel scooter"),
       (default,"car battery","12V car battery"),
       (default,"12-pack drill bits","12-pack of drill bits with sizes ranging from #40 to #3"),
       (default,"hammer","12oz carpenter's hammer"),
       (default,"hammer","14oz carpenter's hammer"),
       (default,"hammer","16oz carpenter's hammer"),
       (default,"rocks","box of assorted rocks"),
       (default,"jacket","water resistent black wind breaker"),
       (default,"spare tire","24 inch spare tire");
       
CREATE TABLE bigdata.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 bigdata.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);

四、整库同步参数介绍

对于 Dinky 整库同步的公共参数，在大多数 Sink 目标端都是适用的。除个别 Sink 目标端，因底层实现方式不同，所以不能一概而论。如 Hudi。公共参数依据 Dinky 提供的语法，如下:

key	value	上下游
connector	mysql-cdc	source 端
hostname	主机名	source 端
port	端口	source 端
username	用户名	source 端
password	密码	source 端
checkpoint	checkpoint 时间间隔	source 端
scan.startup.mode	全量或增量读取	source 端
parallelism	1	source 端
database-name	数据库名称	source 端
table-name	表名称，支持正则	source 端
sink.*	*代表 sink 端所有参数	sink 端

提示: 对于sink.*,在使用的过程中需要注意的是，sink是必须要写的，'*' 星号代表的是所有sink端的参数，比如原生 Flink Sink建表语句的连接器写"connector",在 Dinky 整库同步语法中必须是"sink.connector"。所有的 Sink 端必须参照此语法规范。

五、整库入湖 Hudi

作业脚本

EXECUTE CDCSOURCE demo_hudi2 WITH (
 'connector' = 'mysql-cdc',
 'hostname' = '192.168.0.4',
 'port' = '4406',
 'username' = 'root',
 'password' = '123456',
 'checkpoint' = '3000',
 'scan.startup.mode' = 'initial',
 'parallelism' = '1',
'database-name'='bigdata',
'table-name'='bigdata\.products,bigdata\.orders',
'sink.connector'='hudi',
'sink.path'='hdfs://nameservice1/data/hudi/${tableName}',
'sink.hoodie.datasource.write.recordkey.field'='${pkList}',
'sink.hoodie.parquet.max.file.size'='268435456',
--'sink.write.precombine.field'='gmt_modified',
'sink.write.tasks'='1',
'sink.write.bucket_assign.tasks'='2',
'sink.write.precombine'='true',
'sink.compaction.async.enabled'='true',
'sink.write.task.max.size'='1024',
'sink.write.rate.limit'='3000',
'sink.write.operation'='upsert',
'sink.table.type'='COPY_ON_WRITE',
'sink.compaction.tasks'='1',
'sink.compaction.delta_seconds'='20',
'sink.compaction.async.enabled'='true',
'sink.read.streaming.skip_compaction'='true',
'sink.compaction.delta_commits'='20',
'sink.compaction.trigger.strategy'='num_or_time',
'sink.compaction.max_memory'='500',
'sink.changelog.enabled'='true',
'sink.read.streaming.enabled'='true',
'sink.read.streaming.check.interval'='3',
'sink.hive_sync.skip_ro_suffix' = 'true', 
'sink.hive_sync.enable'='true',
'sink.hive_sync.mode'='hms',
'sink.hive_sync.metastore.uris'='thrift://bigdata1:9083',
'sink.hive_sync.db'='qhc_hudi_ods',
'sink.hive_sync.table'='${tableName}',
'sink.table.prefix.schema'='true'
)

创建并提交作业

查看 HDFS 目录及 Hive 表

创建 StarRocks Hudi 外部表

在创建外部表之前，在Starrocks上首先保证要将hdfs-site.xml文件分别部署到FE和BE节点的conf目录下。重启FE和BE节点。Hudi 外表是只读的，只能用于查询操作。当前支持 Hudi 的表类型为 Copy on write。

创建和管理 Hudi 资源

CREATE EXTERNAL RESOURCE "hudi0" 
PROPERTIES ( 
    "type" = "hudi", 
    "hive.metastore.uris" = "thrift://bigdata1:9083"
);
SHOW RESOURCES;

创建 Hudi 外部表

CREATE EXTERNAL TABLE qhc_sta.orders ( 
  `order_id` int  NULL COMMENT "",
  `order_date` datetime  NULL COMMENT "",
  `customer_name` string NULL COMMENT "",
  `price` decimal(10, 5)  NULL COMMENT "",
  `product_id` int NULL COMMENT "",
  `order_status` int NULL COMMENT  ""
) ENGINE=HUDI 
PROPERTIES ( 
    "resource" = "hudi0", 
    "database" = "qhc_hudi_ods", 
    "table" = "bigdata_orders" 
); 

CREATE EXTERNAL TABLE qhc_sta.products ( 
     id INT,
  name STRING,
  description STRING
) ENGINE=HUDI 
PROPERTIES ( 
    "resource" = "hudi0", 
    "database" = "qhc_hudi_ods", 
    "table" = "bigdata_products" 
);

查看 Hudi 外部表数据

六、整库入仓 StarRocks

作业脚本

EXECUTE CDCSOURCE jobname WITH (
   'connector' = 'mysql-cdc',
  'hostname' = '192.168.0.4',
  'port' = '3306',
  'username' = 'root',
  'password' = '123456',
  'checkpoint' = '3000',
  'scan.startup.mode' = 'initial',
  'parallelism' = '1',
  'table-name' = 'bigdata\.products,bigdata\.orders',
  'sink.connector' = 'starrocks',
  'sink.jdbc-url' = 'jdbc:mysql://192.168.0.4:19035',
  'sink.load-url' = '192.168.0.4:18035',
  'sink.username' = 'devuser',
  'sink.password' = '123456',
  'sink.sink.db' = 'qhc_ods',
  'sink.table.prefix' = 'ods_',
  'sink.table.lower' = 'true',
  'sink.database-name' = 'qhc_ods',
  'sink.table-name' = '${tableName}',
   'sink.sink.properties.format' = 'json',
   'sink.sink.properties.strip_outer_array' = 'true',
   'sink.sink.max-retries' = '10',
   'sink.sink.buffer-flush.interval-ms' = '15000',
   'sink.sink.parallelism' = '1'
)

创建作业

StarRocks 建表

CREATE TABLE qhc_ods.`ods_orders` (
  `order_id` largeint(40) NOT NULL COMMENT "",
  `order_date` datetime NOT NULL COMMENT "",
  `customer_name` varchar(65533) NULL COMMENT "",
  `price` decimal64(10, 5) NOT NULL COMMENT "",
  `product_id` bigint(20) NULL COMMENT "",
  `order_status` boolean NULL COMMENT ""
) ENGINE=OLAP 
PRIMARY KEY(`order_id`)
COMMENT "OLAP"
DISTRIBUTED BY HASH(`order_id`) BUCKETS 10 
PROPERTIES (
"replication_num" = "3",
"colocate_with" = "qhc",
"in_memory" = "false",
"storage_format" = "DEFAULT"
);

CREATE TABLE qhc_ods.`ods_products` (
  `id` largeint(40) NOT NULL COMMENT "",
  `name` varchar(65533) NOT NULL COMMENT "",
  `description` varchar(65533) NULL COMMENT ""
) ENGINE=OLAP 
PRIMARY KEY(`id`)
COMMENT "OLAP"
DISTRIBUTED BY HASH(`id`) BUCKETS 10 
PROPERTIES (
"replication_num" = "3",
"colocate_with" = "qhc",
"in_memory" = "false",
"storage_format" = "DEFAULT"
);

查看 StarRocks 表

查看Starrocks表中数据是不是为空

提交 Flink 整库同步作业

再次查看 StarRocks

七、整库入库 MySQL

作业脚本

EXECUTE CDCSOURCE cdc_mysql2 WITH (
 'connector' = 'mysql-cdc',
 'hostname' = '192.168.0.4',
 'port' = '3306',
 'username' = 'root',
 'password' = '123456',
 'checkpoint' = '3000',
 'scan.startup.mode' = 'initial',
 'parallelism' = '1',
 'table-name' = 'bigdata\.products,bigdata\.orders',
 'sink.connector' = 'jdbc',
 'sink.url' = 'jdbc:mysql://192.168.0.5:3306/test?characterEncoding=utf-8&useSSL=false',
 'sink.username' = 'root',
 'sink.password' = '123456',
 'sink.sink.db' = 'test',
 'sink.table.prefix' = 'test_',
 'sink.table.lower' = 'true',
 'sink.table-name' = '${tableName}',
 'sink.driver' = 'com.mysql.jdbc.Driver',
 'sink.sink.buffer-flush.interval' = '2s',
 'sink.sink.buffer-flush.max-rows' = '100',
 'sink.sink.max-retries' = '5'
)

创建作业

创建 MySQL 表

drop table test.test_products;
CREATE TABLE test.test_products (
  id INTEGER NOT NULL ,
  name VARCHAR(255) NOT NULL,
  description VARCHAR(512)
);

drop table test.test_orders;
CREATE TABLE test.test_orders (
  order_id INTEGER NOT NULL ,
  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
);

提交 Flink 整库同步作业

查看 MySQL 数据

八、整库同步 Kafka

作业脚本

# cdc作业
EXECUTE CDCSOURCE cdc_kafka WITH (
 'connector' = 'mysql-cdc',
 'hostname' = '192.168.0.4',
 'port' = '3306',
 'username' = 'root',
 'password' = '123456',
 'checkpoint' = '3000',
 'scan.startup.mode' = 'initial',
 'parallelism' = '1',
 'table-name' = 'bigdata\.products,bigdata\.orders',
  'sink.connector'='datastream-kafka',
  'sink.topic'='cdctest',
  'sink.brokers'='bigdata2:9092,bigdata3:9092,bigdata4:9092'
)

创建作业

创建 Kafka Topic

创建 topic 可忽略，Dinky 整库同步会自动创建。

# 创建topic
./bin/kafka-topics.sh \
 --create \
 --zookeeper   bigdata2:2181,bigdata3:2181,bigdata4:2181 \
 --replication-factor 3 \
 --partitions 1 \
 --topic cdctest
# 查看topic
./bin/kafka-topics.sh  --list \
--zookeeper bigdata2:2181,bigdata3:2181,bigdata4:2181

提交 Flink 整库同步作业

查看消费者

查看是否2张表数据

./bin/kafka-console-consumer.sh  --bootstrap-server bigdata2:9092,bigdata3:9092,bigdata4:9092  --topic cdctest  --from-beginning  --group test_id

九、整库入库 PostgreSQL

作业脚本

EXECUTE CDCSOURCE cdc_postgresql5 WITH (
 'connector' = 'mysql-cdc',
 'hostname' = '192.168.0.4',
 'port' = '3306',
 'username' = 'root',
 'password' = '123456',
 'checkpoint' = '3000',
 'scan.startup.mode' = 'initial',
 'parallelism' = '1',
 'table-name' = 'bigdata\.products,bigdata\.orders',
 'sink.connector' = 'jdbc',
 'sink.url' = 'jdbc:postgresql://192.168.0.5:5432/test',
 'sink.username' = 'test',
 'sink.password' = '123456',
 'sink.sink.db' = 'test',
 'sink.table.prefix' = 'test_',
 'sink.table.lower' = 'true',
 'sink.table-name' = '${tableName}',
 'sink.driver' = 'org.postgresql.Driver',
 'sink.sink.buffer-flush.interval' = '2s',
 'sink.sink.buffer-flush.max-rows' = '100',
 'sink.sink.max-retries' = '5'
)

创建作业

创建 PostgreSQL 表

CREATE schema test;
drop table test.test_products;
CREATE TABLE test.test_products (
  id INTEGER UNIQUE NOT NULL ,
  name VARCHAR(255) NOT NULL,
  description VARCHAR(512)
);

drop table test.test_orders;
CREATE TABLE test.test_orders (
  order_id INTEGER UNIQUE NOT NULL ,
  order_date timestamp   NULL,
  customer_name VARCHAR(255) NOT NULL,
  price DECIMAL(10, 5) NULL,
  product_id INTEGER NULL,
  order_status INTEGER NOT NULL -- Whether order has been placed
);

提交 Flink 整库同步作业

查看 PostgreSQL 数据

十、整库入仓 ClickHouse

作业脚本

EXECUTE CDCSOURCE cdc_clickhouse WITH (
 'connector' = 'mysql-cdc',
 'hostname' = '192.168.0.4',
 'port' = '4406',
 'username' = 'root',
 'password' = '123456',
 'checkpoint' = '3000',
 'scan.startup.mode' = 'initial',
 'parallelism' = '1',
 'table-name' = 'bigdata\.products,bigdata\.orders',
  'sink.connector' = 'clickhouse',
  'sink.url' = 'clickhouse://192.168.0.5:8123',
  'sink.username' = 'default',
  'sink.password' = '123456',
  'sink.sink.db' = 'test',
  'sink.table.prefix' = 'test_',
  'sink.table.lower' = 'true',
  'sink.database-name' = 'test',
  'sink.table-name' = '${tableName}',
  'sink.sink.batch-size' = '500',
  'sink.sink.flush-interval' = '1000',
  'sink.sink.max-retries' = '3'
)

创建作业

创建 ClickHouse 表

# 创建语句为本地表
create database test;
drop table test.test_products;
CREATE TABLE test.test_products (
  id Int64  NOT NULL ,
  name String NOT NULL,
  description String
)
ENGINE = MergeTree()
ORDER BY id
PRIMARY KEY id;

drop table test.test_orders;
CREATE TABLE test.test_orders (
  order_id Int64  NOT NULL ,
  order_date DATETIME NOT NULL,
  customer_name String NOT NULL,
  price DECIMAL(10, 5) NOT NULL,
  product_id Int64  NOT NULL,
  order_status BOOLEAN NOT NULL -- Whether order has been placed
)
ENGINE = MergeTree()
ORDER BY order_id
PRIMARY KEY order_id;

提交 Flink 整库同步作业