如何设置 Kafka 连接器以在 Debezium 中使用自定义转换？

Question

我是 Kafka 的新手，我不知道如何使用“transforms.router.type”让它与我的 Debezium 设置一起工作。所以我进行了特殊的事件转换 java class 并为它准备了配置以部署到如下所示的容器中：

curl -X POST -H "Accept:application/json" -H "Content-Type:application/json" localhost:8083/connectors/ -d

{
  "name": "task-connector",
  "config": {
    "connector.class": "io.debezium.connector.postgresql.PostgresConnector",
    "tasks.max": "1",
    "slot.name" : "task_engine_saga",
    "database.hostname": "postgres",
    "database.port": "5432",
    "database.user": "postgres",
    "database.password": "postgres",
    "database.dbname" : "tasks",
    "schema.whitelist": "public",
    "table.whitelist" : "public.task",
    "tombstones.on.delete" : "false",
    "transforms" : "router",
    "transforms.router.type" : "com.task.connect.TaskEventRouter"
  }
}

响应说找不到这个配置。

CREATE kafka connector task-connector....
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  1091  100   516  100   575   8322   9274 --:--:-- --:--:-- --:--:-- 17596{"error_code":400,"message":"Connector configuration is invalid and contains the following 3 error(s):\nInvalid value com.task.connect.TaskEventRouter for configuration transforms.router.type: Class com.task.connect.TaskEventRouter could not be found.\nInvalid value null for configuration transforms.router.type: Not a Transformation\nA value is required\nYou can also find the above list of errors at the endpoint `/connector-plugins/{connectorType}/config/validate`"}

然后我将带有 jar 文件的主机文件夹复制到容器 /connect 目录，其中我有 java class 和事件转换逻辑，但它也没有帮助。有人可以帮助我并告诉我应该怎么做才能使这个自定义 transforms.router.type 与我的 Debezium 设置一起工作吗？

我的容器docker-组合设置：

version: '3'
services:
    pgadmin:
        container_name: pgadmin_container
        image: dpage/pgadmin4
        environment:
            PGADMIN_DEFAULT_EMAIL: ${PGADMIN_DEFAULT_EMAIL:-pgadmin4@pgadmin.org}
            PGADMIN_DEFAULT_PASSWORD: ${PGADMIN_DEFAULT_PASSWORD:-admin}
        volumes:
            - pgadmin:/root/.pgadmin
        ports:
            - "${PGADMIN_PORT:-5050}:80"
        restart: unless-stopped

    zookeeper:
        image: debezium/zookeeper:1.3
        ports:
            - 2181:2181
            - 2888:2888
            - 3888:3888
    kafka:
        image: debezium/kafka:1.3
        ports:
            - 9092:9092
        links:
            - zookeeper
        environment:
            - ZOOKEEPER_CONNECT=zookeeper:2181
    postgres:
        image: debezium/example-postgres:1.3
        ports:
            - 5432:5432
        environment:
            - POSTGRES_USER=postgres
            - POSTGRES_PASSWORD=postgres
            - PGDATA=/data/postgres
            - POSTGRES_DB=${POSTGRES_DB:-task_engine}
    connect:
        image: debezium/connect:1.3
        ports:
            - 8083:8083
        links:
            - kafka
            - postgres
        environment:
            - BOOTSTRAP_SERVERS=kafka:9092
            - GROUP_ID=1
            - CONFIG_STORAGE_TOPIC=my_connect_configs
            - OFFSET_STORAGE_TOPIC=my_connect_offsets
            - STATUS_STORAGE_TOPIC=my_connect_statuses

volumes:
    postgres:
    pgadmin:

Answer 1

I made special event transformation java class

据我所知，您还没有将这个已编译的 class 挂载到您的 debezium 映像中或编辑 plugin.path 文件以包含该 JAR

如果您使用该数据创建了自己的 Docker 图像，那么您应该更改 image: debezium/connect:1.3

这可以解释为什么转换不可用

如何设置 Kafka 连接器以在 Debezium 中使用自定义转换？

How to set up Kafka-connector to use custom transform in Debezium?

java

apache-kafka

apache-kafka-connect

debezium