Aurora MySQL replication between unencrypted and encrypted clusters

Question

Is it possible to set up native MySQL replication between an unencrypted cluster and an encrypted cluster?  Could replication also be set up between a cluster encrypted with the default key and one encrypted with a multi-region key?  I have set up replication between unencrypted clusters and between clusters encrypted with the same key before without any problems but currently for the questions about the Slave_IO_State is always "Connecting to master".

Giovanni Lauria · Answer

MySQL replication can be set up between an unencrypted cluster and an encrypted cluster. If the source DB cluster is encrypted, the read replica must also be encrypted.

Anyway, a replication between a cluster encrypted with the default key and one encrypted with a multi-region key **might not be possible** due to region-specific KMS encryption keys. A custom MAster KMS key can be used.

The issue of Slave_IO_State always being “Connecting to master” could be due to incorrect user privileges.

Aurora MySQL replication between unencrypted and encrypted clusters

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