2.2.2. 验证 Debezium 连接器是否正在运行

流程

1. 使用以下方法之一检查 KafkaConnector 资源的状态：

   • 通过 OpenShift Container Platform Web 控制台：

     1. 导航到 Home Search。
     2. 在 Search 页面中，点 Resources 打开 Select Resource 框，然后键入 KafkaConnector。
     3. 在 KafkaConnectors 列表中，点您要检查的连接器名称，如 inventory-connector-mysql。
     4. 在 Conditions 部分，验证 Type 和 Status 列中的值是否已设置为 Ready 和 True。

   • 在终端窗口中：

     1. 使用以下命令：

        oc describe KafkaConnector <connector-name> -n <project>

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        例如，

        oc describe KafkaConnector inventory-connector-mysql -n debezium

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        该命令返回类似以下示例的状态信息：

        例 2.3. KafkaConnector 资源状态

        Name:         inventory-connector-mysql
        Namespace:    debezium
        Labels:       strimzi.io/cluster=debezium-kafka-connect-cluster
        Annotations:  <none>
        API Version:  kafka.strimzi.io/v1beta2
        Kind:         KafkaConnector
        
        ...
        
        Status:
          Conditions:
            Last Transition Time:  2021-12-08T17:41:34.897153Z
            Status:                True
            Type:                  Ready
          Connector Status:
            Connector:
              State:      RUNNING
              worker_id:  10.131.1.124:8083
            Name:         inventory-connector-mysql
            Tasks:
              Id:               0
              State:            RUNNING
              worker_id:        10.131.1.124:8083
            Type:               source
          Observed Generation:  1
          Tasks Max:            1
          Topics:
            inventory_connector_mysql
            inventory_connector_mysql.inventory.addresses
            inventory_connector_mysql.inventory.customers
            inventory_connector_mysql.inventory.geom
            inventory_connector_mysql.inventory.orders
            inventory_connector_mysql.inventory.products
            inventory_connector_mysql.inventory.products_on_hand
        Events:  <none>

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2. 验证连接器是否创建了 Kafka 主题：

   • 从 OpenShift Container Platform Web 控制台。

     1. 导航到 Home Search。
     2. 在 Search 页面中，点 Resources 打开 Select Resource 框，然后键入 KafkaTopic。
     3. 在 KafkaTopics 列表中，点您要检查的主题名称，例如 inventory-connector-mysql.inventory.orders--ac5e98ac6a5d91e91e04d8ec0dc78a1ece439081d。
     4. 在 Conditions 部分，验证 Type 和 Status 列中的值是否已设置为 Ready 和 True。

   • 在终端窗口中：

     1. 使用以下命令：

        oc get kafkatopics

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        该命令返回类似以下示例的状态信息：

        例 2.4. KafkaTopic 资源状态

        NAME                                                                                                   CLUSTER             PARTITIONS   REPLICATION FACTOR   READY
        connect-cluster-configs                                                                           debezium-kafka-cluster   1            1                    True
        connect-cluster-offsets                                                                           debezium-kafka-cluster   25           1                    True
        connect-cluster-status                                                                            debezium-kafka-cluster   5            1                    True
        consumer-offsets---84e7a678d08f4bd226872e5cdd4eb527fadc1c6a                                       debezium-kafka-cluster   50           1                    True
        inventory-connector-mysql---a96f69b23d6118ff415f772679da623fbbb99421                              debezium-kafka-cluster   1            1                    True
        inventory-connector-mysql.inventory.addresses---1b6beaf7b2eb57d177d92be90ca2b210c9a56480          debezium-kafka-cluster   1            1                    True
        inventory-connector-mysql.inventory.customers---9931e04ec92ecc0924f4406af3fdace7545c483b          debezium-kafka-cluster   1            1                    True
        inventory-connector-mysql.inventory.geom---9f7e136091f071bf49ca59bf99e86c713ee58dd5               debezium-kafka-cluster   1            1                    True
        inventory-connector-mysql.inventory.orders---ac5e98ac6a5d91e04d8ec0dc9078a1ece439081d             debezium-kafka-cluster   1            1                    True
        inventory-connector-mysql.inventory.products---df0746db116844cee2297fab611c21b56f82dcef           debezium-kafka-cluster   1            1                    True
        inventory-connector-mysql.inventory.products-on-hand---8649e0f17ffcc9212e266e31a7aeea4585e5c6b5   debezium-kafka-cluster   1            1                    True
        schema-changes.inventory                                                                          debezium-kafka-cluster   1            1                    True
        strimzi-store-topic---effb8e3e057afce1ecf67c3f5d8e4e3ff177fc55                                    debezium-kafka-cluster   1            1                    True
        strimzi-topic-operator-kstreams-topic-store-changelog---b75e702040b99be8a9263134de3507fc0cc4017b  debezium-kafka-cluster   1            1                    True

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3. 检查主题内容。

   • 在终端窗口中输入以下命令：

   oc exec -n <project>  -it <kafka-cluster> -- /opt/kafka/bin/kafka-console-consumer.sh \
   >     --bootstrap-server localhost:9092 \
   >     --from-beginning \
   >     --property print.key=true \
   >     --topic=<topic-name>

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   例如，

    oc exec -n debezium  -it debezium-kafka-cluster-kafka-0 -- /opt/kafka/bin/kafka-console-consumer.sh \
   >     --bootstrap-server localhost:9092 \
   >     --from-beginning \
   >     --property print.key=true \
   >     --topic=inventory_connector_mysql.inventory.products_on_hand

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   指定主题名称的格式与步骤 1 中介绍的 oc describe 命令相同，例如 inventory_connector_mysql.inventory.addresses。

   对于主题中的每个事件，命令会返回类似如下的信息：

   例 2.5. Debezium 更改事件的内容

   {"schema":{"type":"struct","fields":[{"type":"int32","optional":false,"field":"product_id"}],"optional":false,"name":"inventory_connector_mysql.inventory.products_on_hand.Key"},"payload":{"product_id":101}}	{"schema":{"type":"struct","fields":[{"type":"struct","fields":[{"type":"int32","optional":false,"field":"product_id"},{"type":"int32","optional":false,"field":"quantity"}],"optional":true,"name":"inventory_connector_mysql.inventory.products_on_hand.Value","field":"before"},{"type":"struct","fields":[{"type":"int32","optional":false,"field":"product_id"},{"type":"int32","optional":false,"field":"quantity"}],"optional":true,"name":"inventory_connector_mysql.inventory.products_on_hand.Value","field":"after"},{"type":"struct","fields":[{"type":"string","optional":false,"field":"version"},{"type":"string","optional":false,"field":"connector"},{"type":"string","optional":false,"field":"name"},{"type":"int64","optional":false,"field":"ts_ms"},{"type":"string","optional":true,"name":"io.debezium.data.Enum","version":1,"parameters":{"allowed":"true,last,false"},"default":"false","field":"snapshot"},{"type":"string","optional":false,"field":"db"},{"type":"string","optional":true,"field":"sequence"},{"type":"string","optional":true,"field":"table"},{"type":"int64","optional":false,"field":"server_id"},{"type":"string","optional":true,"field":"gtid"},{"type":"string","optional":false,"field":"file"},{"type":"int64","optional":false,"field":"pos"},{"type":"int32","optional":false,"field":"row"},{"type":"int64","optional":true,"field":"thread"},{"type":"string","optional":true,"field":"query"}],"optional":false,"name":"io.debezium.connector.mysql.Source","field":"source"},{"type":"string","optional":false,"field":"op"},{"type":"int64","optional":true,"field":"ts_ms"},{"type":"struct","fields":[{"type":"string","optional":false,"field":"id"},{"type":"int64","optional":false,"field":"total_order"},{"type":"int64","optional":false,"field":"data_collection_order"}],"optional":true,"field":"transaction"}],"optional":false,"name":"inventory_connector_mysql.inventory.products_on_hand.Envelope"},"payload":{"before":null,"after":{"product_id":101,"quantity":3},"source":{"version":"1.9.5.Final-redhat-00001","connector":"mysql","name":"inventory_connector_mysql","ts_ms":1638985247805,"snapshot":"true","db":"inventory","sequence":null,"table":"products_on_hand","server_id":0,"gtid":null,"file":"mysql-bin.000003","pos":156,"row":0,"thread":null,"query":null},"op":"r","ts_ms":1638985247805,"transaction":null}}

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   在前面的示例中，有效负载 值显示，连接器快照从表 清单中生成读("op" ="r")事件。product_on_hand.product_id 记录的 "前面" 状态为 null，表示记录不存在之前的值。"after" 状态显示带有 product_id 101 的项目 的数量 3。