The solution is overall simple, clear, and easy to operate, with no data backlog, ensuring messages are consumed promptly, and business risks are controllable.
Migration Steps
Migration Step
Operation Description
Cluster Status
1.Migrate metadata.
1. Purchase a TDMQ for RabbitMQ cluster.
2. Complete metadata migration.
3. Keep the existing cluster in read-write status.
Existing cluster: Read-Write
New cluster: Ready
2.Enable dual-read.
1. Connect new consumers to the new cluster.
2. Keep parallel consumption on both the existing and new clusters.
Existing cluster: Read-Write
New cluster: Read-only
3.Enable dual-write and dual-read.
1. Connect new producers to the new cluster.
2. Gradually shift traffic to the new cluster through a grayscale release.
Existing cluster: Read-Write
New cluster: Read-Write
4.Enable single-write and dual-read.
1. Stop traffic to the producers of the existing cluster.
2. Keep the consumers of the existing clusters to continue processing residual messages.
Existing cluster: Read-only
New cluster: Read-Write
5.Complete the migration.
1. Confirm that all messages in the existing cluster have been consumed with no message backlog.
