Migrating RabbitMQ Services
Scenario
Migrate RabbitMQ services from a single-node or cluster instance not on Huawei Cloud (the source instance) to a RabbitMQ instance on Huawei Cloud (the destination instance).
Solution
Migrate production applications and then consumption applications. No data migration is involved.
Procedure
Migrate the production applications to the destination instance. New messages are no longer published to the source instance, and consumer applications consume messages from both the source and destination instances. After all messages in the source instance are consumed, migrate the consumption applications to the destination instance.
- Messages may not be ordered consistently.
- Ensure that the client and the destination instance can be connected.
Check whether all messages in the source instance have been consumed by using the RabbitMQ Management UI or by calling an API:
- Using the RabbitMQ Management UI, as shown in Figure 1.
On the Overview tab page, if the number of messages that can be consumed (Ready) and the number of messages that are not acknowledged (Unacked) are both 0, the consumption is complete.
- Using an API
curl -s -u username:password -XGET http://ip:port/api/overview
Parameter description:
- username: account used to log in to the RabbitMQ Management UI for the source instance
- password: password used to log in to the RabbitMQ Management UI for the source instance
- ip: IP address used to log in to the RabbitMQ Management UI for the source instance
- port: port used to log in to the RabbitMQ Management UI for the source instance
When the values of messages_ready and messages_unacknowledged in the command output are both 0, the consumption is complete.
Figure 2 Command output
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