Hello, friend!
Rainbow is a migration tool used to migrate host (x86 servers or VMs on other specified virtualization platforms) operating systems (OSs) and data to the FusionCompute 6.3.0/6.3.1/6.5.RC1/6.5.0/6.5.1/8.0.RC3/8.0.0/8.0.1, FusionCloud 2.0.6/6.3.0/6.3.1, HUAWEI CLOUD Stack 6.5.0/6.5.1/8.0.RC3/8.0.0/8.0.1/8.0.2 KVM virtualization platform.

Hope this helps!