为数据库中的多个表配置 debezium 连接器

Question

我正在尝试为 MySQL 数据库中的多个 table 配置 Debezium 连接器（我在 MySQL 8.0 上使用 debezium 1.4）。我公司在kafka中创建主题时有一个命名模式要遵循，这个模式不允许使用下划线（_），所以我不得不用连字符（-）

替换它们

所以，我的主题名称是：

主题 1

fjf.db.top-domain.domain.sub-domain.transaction-search.order-status
WHERE
- transaction-search = schema "transaction_search"
- order-status = table "order_status". 
- All changes in that table, must go to that topic.

主题 2

fjf.db.top-domain.domain.sub-domain.transaction-search.shipping-tracking
WHERE
- transaction-search = schema "transaction_search"
- shipping-tracking = table "shipping_tracking"
- All changes in that table, must go to that topic.

主题 3

fjf.db.top-domain.domain.sub-domain.transaction-search.proposal
WHERE
- transaction-search = schema "transaction_search"
- proposal = table "proposal"
- All changes in that table, must go to that topic.

我正在尝试使用转换“ByLogicalTableRouter”，但找不到解决我的情况的正则表达式解决方案。

{ "name": "debezium.connector",
 "config":
    { 
"connector.class": "io.debezium.connector.mysql.MySqlConnector",
"tasks.max": "1",
"database.hostname": "myhostname",
"database.port": "3306",
"database.user": "debezium", 
"database.password": "password", 
"database.server.id": "1000", 
"database.server.name": "fjf.db.top-domain.domain.sub-domain.transaction-search",
"schema.include.list": "transaction_search",
"table.include.list": "transaction_search.order_status,transaction_search.shipping_tracking,transaction_search.proposal",
"database.history.kafka.bootstrap.servers": "kafka.intranet:9097",
"database.history.kafka.topic": "fjf.db.top-domain.domain.sub-domain.transaction-search.schema-history",
"snapshot.mode": "schema_only",
"transforms":"RerouteName,RerouteUnderscore",
"transforms.RerouteName.type":"io.debezium.transforms.ByLogicalTableRouter",
"transforms.RerouteName.topic.regex":"(.*)transaction_search(.*)",
"transforms.RerouteName.topic.replacement": "" 
"transforms.RerouteUnderscore.type":"io.debezium.transforms.ByLogicalTableRouter",
"transforms.RerouteUnderscore.topic.regex":"(.*)_(.*)",
"transforms.RerouteUnderscore.topic.replacement": "-" 
    }
}

在第一个转换中，我试图删除重复的模式主题路由中的名称。
在第二次变换中，替换所有对于 hiphens 仍然是下划线 _ -

但是，我收到了下面的错误，这表明它正在尝试将所有内容发送到同一主题

Caused by: org.apache.kafka.connect.errors.SchemaBuilderException: Cannot create field because of field name duplication __dbz__physicalTableIdentifier

我如何进行转换，将每个 table 的事件转发到各自的主题？

Answer 1

正在删除架构名称

In the first transforms,im trying to remove the duplicated schema name in the topic routering.

用你的正则表达式转换后你会有两个点，所以你需要修复它：

"transforms.RerouteName.topic.regex":"([^.]+)\.transaction_search\.([^.]+)",
"transforms.RerouteName.topic.replacement": "."

替换 hiphens 的下划线

您可以尝试使用ChangeCase SMT from Kafka Connect Common Transformations。

为数据库中的多个表配置 debezium 连接器

Configure a debezium connector for multiple tables in a database

mysql

apache-kafka

apache-kafka-connect

debezium

cdc