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This introduces the multi-arch zones, allowing users to select the VM arch upon deployment. Multi-arch zone support in CloudStack can allow admins to mix x86_64 & arm64 hosts within the same zone with the following changes proposed: - All hosts in a clusters need to be homogenous, wrt host CPU type (amd64 vs arm64) and hypevisor - Arch-aware templates & ISOs: - Add support for a new arch field (default set of: amd64 and arm64), when unspecified defaults to amd64 and for existing templates & iso - Allow admins to edit the arch type of the registered template & iso - Arch-aware clusters and host: - Add new attribute field for cluster and hosts (kvm host agents can automatically report this, arch of the first host of the cluster is cluster's architecture), defaults to amd64 when not specified - Allow admins to edit the arch of an existing cluster - VM deployment form (UI): - In a multi-arch zone/env, the VM deployment form can allow some kind of template/iso filtration in the UI - Users should be able to select arch: amd64 & arm64; but this is shown only in a multi-arch zone (env) - VM orchestration and lifecycle operations: - Use of VM/template's arch to correctly decide where to provision the VM (on the correct strictly arch-matching host/clusters) & other lifecycle operations (such as migration from/to arch-matching hosts) Co-authored-by: Rohit Yadav <rohit.yadav@shapeblue.com>