This topic describes how to use the metadata migration tool provided by Message Queue for Apache Kafka to migrate topic metadata from one Message Queue for Apache Kafka instance to another Message Queue for Apache Kafka instance.

Prerequisites

Before you migrate topic metadata between Message Queue for Apache Kafka instances, make sure that the following operations are complete:
Notice
  • After the migration is complete, the relevant topic in the source Message Queue for Apache Kafka instance is not deleted. Instead, a new topic with the same configuration is created in the destination Message Queue for Apache Kafka instance.
  • Only the topic configuration is migrated. The messages in the source topic are not migrated.

Procedure

  1. Start the command-line tool.
  2. Run the cd command to switch to the directory where the migration tool is located.
  3. Run the following command to check the topic metadata to be migrated:
    java -jar kafka-migration.jar TopicMigrationFromAliyun --sourceAk <yoursourceAccessKeyId> --sourceSk <yoursourceAccessKeySecret> --sourceRegionId <yoursourceRegionId> --sourceInstanceId <yoursourceInstanceId> --destAk <yourdestAccessKeyId> --destSk <yourdestAccessKeySecret> --destRegionId <yourdestRegionId> --destInstanceId <yourdestInstanceId>
    Parameter Description
    sourceAk The AccessKey ID of the Alibaba Cloud account to which the source Message Queue for Apache Kafka instance belongs.
    sourceSk The AccessKey secret of the Alibaba Cloud account to which the source Message Queue for Apache Kafka instance belongs.
    sourceRegionId The ID of the region where the source Message Queue for Apache Kafka instance is located.
    sourceInstanceId The ID of the source Message Queue for Apache Kafka instance.
    destAk The AccessKey ID of the Alibaba Cloud account to which the destination Message Queue for Apache Kafka instance belongs.
    destSk The AccessKey secret of the Alibaba Cloud account to which the destination Message Queue for Apache Kafka instance belongs.
    destRegionId The ID of the region where the destination Message Queue for Apache Kafka instance is located.
    destInstanceId The ID of the destination Message Queue for Apache Kafka instance.
    The following code provides an example of the topic metadata to be checked: 
    15:13:12 INFO - cmd=TopicMigrationFromAliyun, request=null, response={"total":4,"code":200,"requestId":"1CBAB340-2146-43A3-8470-84D77DB8B43E","success":true,"pageSize":10000,"currentPage":1,"message":"operation success.","topicList":[{"instanceId":"alikafka_pre-cn-0pp1cng20***","localTopic":false,"createTime":1578558314000,"regionId":"cn-hangzhou","statusName":"Running","topic":"agdagasdg","remark":"agdadgdasg","partitionNum":12,"compactTopic":false,"status":0,"tags":[]},{"instanceId":"alikafka_pre-cn-0pp1cng20***","localTopic":false,"createTime":1578558294000,"regionId":"cn-hangzhou","statusName":"Running","topic":"135215","remark":"1315215","partitionNum":12,"compactTopic":false,"status":0,"tags":[]},{"instanceId":"alikafka_pre-cn-0pp1cng20***","localTopic":false,"createTime":1578558214000,"regionId":"cn-hangzhou","statusName":"Running","topic":"1332","remark":"13414","partitionNum":12,"compactTopic":false,"status":0,"tags":[]},{"instanceId":"alikafka_pre-cn-0pp1cng20***","localTopic":false,"createTime":1578558141000,"regionId":"cn-hangzhou","statusName":"Running","topic":"aete","remark":"est","partitionNum":12,"compactTopic":false,"status":0,"tags":[]}]}
15:13:12 INFO - Will create topic:agdagasdg, isCompactTopic:false, partition number:12
15:13:12 INFO - Will create topic:135215, isCompactTopic:false, partition number:12
15:13:12 INFO - Will create topic:1332, isCompactTopic:false, partition number:12
15:13:12 INFO - Will create topic:aete, isCompactTopic:false, partition number:12
  4. Run the following command to commit the topic metadata to be migrated:
    java -jar kafka-migration.jar TopicMigrationFromAliyun --sourceAk <yoursourceAccessKeyId> --sourceSk <yoursourceAccessKeySecret> --sourceRegionId <yoursourceRegionId> --sourceInstanceId <yoursourceInstanceId> --destAk <yourdestAccessKeyId> --destSk <yourdestAccessKeySecret> --destRegionId <yourdestRegionId> --destInstanceId <yourdestInstanceId> --commit
    Parameter Description
    commit Commits the topic metadata to be migrated.
    The following code provides an example of the output generated after the topic metadata to be migrated is committed: 
    16:38:30 INFO - cmd=TopicMigrationFromAliyun, request=null, response={"code":200,"requestId":"A0CA4D70-46D4-45CF-B9E0-B117610A26DB","success":true,"message":"operation success"}
16:38:30 INFO - TopicCreate success, topic=agdagasdg, partition number=12, isCompactTopic=false
16:38:36 INFO - cmd=TopicMigrationFromAliyun, request=null, response={"code":200,"requestId":"05E88C75-64B6-4C87-B962-A63D906FD993","success":true,"message":"operation success"}
16:38:36 INFO - TopicCreate success, topic=135215, partition number=12, isCompactTopic=false
16:38:42 INFO - cmd=TopicMigrationFromAliyun, request=null, response={"code":200,"requestId":"9D54F6DB-6FA0-4F6D-B19A-09109F70BDDA","success":true,"message":"operation success"}
16:38:42 INFO - TopicCreate success, topic=1332, partition number=12, isCompactTopic=false
16:38:49 INFO - cmd=TopicMigrationFromAliyun, request=null, response={"code":200,"requestId":"6C265013-D15E-49AE-BE55-BF7657ADA1B7","success":true,"message":"operation success"}
16:38:49 INFO - TopicCreate success, topic=aete, partition number=12, isCompactTopic=false
  5. Check whether the required topic is migrated.
    1. Log on to the Message Queue for Apache Kafka console.
    2. In the Resource Distribution section of the Overview page, select the region where your instance resides.
    3. On the Instances page, click the name of the instance that you want to manage.
    4. In the left-side navigation pane, click Topics.
    5. On the Topics page, check whether the required topic is displayed.