virt-install on centos 7.9 not seeing qemu-aarch64?

[Owen LaGarde]

I think I've missed something in the support packages enabling arch=aarch64 guests on a centos 7.9 host, such that virt-install won't accept an arch of 'aarch64' or 'arm' where ubuntu works fine.

I'm trying to create a Rocky 8 aarch64 guest on a centos 7.9 host, coming from an ubuntu host.  I have this working on a minimal popos at home just to verify I'm not insane.  The "real, at work" host does have to be centos 7 x86_64 though it will be replaced with rocky 8 x86_64 "soon".  The kicker:  I'd very much prefer to use virt-install because there's a large amount of pre-existing automation I'd have to rewrite otherwise.  I see the arm and aarch64 support added by the expected qemu-user (2.0.0-1.el7.6.x86_64) but virt-install won't use it(?).

Here's the process as currently written into the existing automation.  This works fine on the popos 21.10 minimal-plus-indicated-dpkgs, shouldn't be any surprises here (yes, there's some extra garbage on the centos side from my flailing about):

> virt-install \
>               --connect qemu:///system \
>               --name apollo \
>               --metadata title=apollo \
>               --os-variant linux \
>               --vcpus 4 \
>               --ram 4096 \
>               --arch aarch64 \
>               --rng /dev/urandom \
>               --nonetwork \
>               --nographics \
>               --noautoconsole \
>               --controller
>               type=scsi,model=virtio-scsi \
>               --disk
>               pool=apollo,size=20,format=raw,bus=scsi \
>               --location
>               /opt/kvm/media/Rocky-8.5-aarch64-dvd1.iso \
>               --initrd-inject
>               /opt/kvm/kickstart/Rocky8.cfg \
>               --extra-args 'ks=file:/Rocky8.cfg
>               console=ttyS0'
>               
>             /opt/kvm/kickstart/Rocky8.cfg:
>           auth --enableshadow --passalgo=sha512
>           cdrom
>           text
>           cmdline
>           poweroff
>           firstboot --enable
>           ignoredisk --only-use=sda
>           keyboard --vckeymap=us --xlayouts='us'
>           lang en_US.UTF-8
>           eula --agreed
>           firewall --enabled --service ssh
>           services --disabled=kdump --enabled=sshd
>           selinux --enforcing
>           timezone America/New_York --isUtc
>           bootloader --location=mbr --boot-drive=sda
>           clearpart --drives=sda --all --initlabel
>           part /boot --fstype='xfs' --_ondisk_=sda
>           --size=1024 --label=boot
>           part /boot/efi --fstype='efi' --_ondisk_=sda
>           --size=1024 --fsoptions='umask=0077,shortname=winnt'
>           part pv.357 --fstype='lvmpv' --_ondisk_=sda
>           --grow
>           volgroup centos --pesize=4096 pv.357
>           logvol /home --fstype='xfs' --size=1024
>           --label='home' --name=home --vgname=centos
>           logvol /usr/local --fstype='xfs'
>           --size=1024 --label='local' --name=local --vgname=centos
>           logvol / --fstype='xfs' --size=4096
>           --label='root' --name=root --vgname=centos
>           logvol /var --fstype='xfs' --size=4096
>           --label='var' --name=var --vgname=centos
>           logvol /opt --fstype='xfs' --size=1024
>           --label='opt' --name=opt --vgname=centos
>           logvol /var/log --fstype='xfs' --size=1024
>           --label='log' --name=log --vgname=centos
>           logvol swap --fstype='swap' --size=1024
>           --name=swap --vgname=centos
>           logvol /var/log/audit --fstype='xfs'
>           --size=1024 --label='audit' --name=audit --vgname=centos
>           %packages
>           @base
>           @core
>           yum-utils
>           createrepo
>           pciutils
>           usbutils
>           net-tools
>           tcpdump
>           psmisc
>           %end
>           %addon com_redhat_kdump --disable
>           --reserve-mb='auto'
>           %end
>           %anaconda
>           pwpolicy root --minlen=6 --minquality=1
>           --notstrict --nochanges --notempty
>           pwpolicy user --minlen=6 --minquality=1
>           --notstrict --nochanges --emptyok
>           pwpolicy luks --minlen=6 --minquality=1
>           --notstrict --nochanges --notempty
>           %end
>           
>           dpkg -l |egrep -i qemu\|libvirt\|aarch64 |awk '{print $2}'  ##
>           popos
>               gir1.2-libvirt-glib-1.0:amd64
>               ipxe-qemu
>               ipxe-qemu-256k-compat-efi-roms
>               libnss-libvirt:amd64
>               libsys-virt-perl
>               libvirt-clients
>               libvirt-daemon
>               libvirt-daemon-config-network
>               libvirt-daemon-config-nwfilter
>               libvirt-daemon-driver-qemu
>               libvirt-daemon-driver-storage-rbd
>               libvirt-daemon-system
>               libvirt-daemon-system-systemd
>               libvirt-glib-1.0-0:amd64
>               libvirt-glib-1.0-data
>               libvirt0:amd64
>               python3-libvirt
>               qemu
>               qemu-block-extra
>               qemu-efi-aarch64
>               qemu-efi-arm
>               qemu-kvm
>               qemu-system
>               qemu-system-arm
>               qemu-system-common
>               qemu-system-data
>               qemu-system-gui:amd64
>               qemu-system-mips
>               qemu-system-misc
>               qemu-system-ppc
>               qemu-system-s390x
>               qemu-system-sparc
>               qemu-system-x86
>               qemu-utils
>           
>           rpm -qa |egrep -i qemu\|libvirt\|aarch64  ## centos
>               libvirt-gconfig-1.0.0-1.el7.x86_64
>               libvirt-bash-completion-4.5.0-36.el7_9.5.x86_64
>               qemu-system-arm-2.0.0-1.el7.6.x86_64
>              
>           libvirt-daemon-driver-storage-logical-4.5.0-36.el7_9.5.x86_64
>               libvirt-daemon-driver-lxc-4.5.0-36.el7_9.5.x86_64
>               libvirt-python-4.5.0-1.el7.x86_64
>               qemu-common-2.0.0-1.el7.6.x86_64
>               qemu-system-lm32-2.0.0-1.el7.6.x86_64
>              
>           libvirt-daemon-driver-storage-mpath-4.5.0-36.el7_9.5.x86_64
>               qemu-system-xtensa-2.0.0-1.el7.6.x86_64
>               libvirt-daemon-driver-nodedev-4.5.0-36.el7_9.5.x86_64
>               libvirt-4.5.0-36.el7_9.5.x86_64
>               qemu-system-alpha-2.0.0-1.el7.6.x86_64
>               libvirt-libs-4.5.0-36.el7_9.5.x86_64
>               libvirt-daemon-driver-storage-4.5.0-36.el7_9.5.x86_64
>               libvirt-lock-sanlock-4.5.0-36.el7_9.5.x86_64
>               qemu-guest-agent-2.12.0-3.el7.x86_64
>               qemu-system-or32-2.0.0-1.el7.6.x86_64
>               qemu-system-m68k-2.0.0-1.el7.6.x86_64
>               libvirt-daemon-driver-storage-core-4.5.0-36.el7_9.5.x86_64
>               libvirt-daemon-driver-storage-rbd-4.5.0-36.el7_9.5.x86_64
>               qemu-img-1.5.3-175.el7_9.5.x86_64
>               qemu-system-sh4-2.0.0-1.el7.6.x86_64
>               libvirt-daemon-driver-storage-scsi-4.5.0-36.el7_9.5.x86_64
>               libvirt-daemon-driver-network-4.5.0-36.el7_9.5.x86_64
>               libvirt-nss-4.5.0-36.el7_9.5.x86_64
>               qemu-kvm-common-1.5.3-175.el7_9.5.x86_64
>               qemu-system-unicore32-2.0.0-1.el7.6.x86_64
>               qemu-system-s390x-2.0.0-1.el7.6.x86_64
>              
>           libvirt-daemon-driver-storage-iscsi-4.5.0-36.el7_9.5.x86_64
>               libvirt-daemon-config-network-4.5.0-36.el7_9.5.x86_64
>               python36-libvirt-4.5.0-1.el7.x86_64
>               qemu-system-cris-2.0.0-1.el7.6.x86_64
>               qemu-system-mips-2.0.0-1.el7.6.x86_64
>               libvirt-daemon-driver-nwfilter-4.5.0-36.el7_9.5.x86_64
>               libvirt-daemon-driver-secret-4.5.0-36.el7_9.5.x86_64
>               libvirt-daemon-driver-interface-4.5.0-36.el7_9.5.x86_64
>               libvirt-client-4.5.0-36.el7_9.5.x86_64
>               qemu-2.0.0-1.el7.6.x86_64
>               qemu-system-x86-2.0.0-1.el7.6.x86_64
>              
>           libvirt-daemon-driver-storage-gluster-4.5.0-36.el7_9.5.x86_64
>               qemu-kvm-1.5.3-175.el7_9.5.x86_64
>               qemu-system-moxie-2.0.0-1.el7.6.x86_64
>               libvirt-daemon-4.5.0-36.el7_9.5.x86_64
>               libvirt-admin-4.5.0-36.el7_9.5.x86_64
>               qemu-user-2.0.0-1.el7.6.x86_64
>               libvirt-daemon-config-nwfilter-4.5.0-36.el7_9.5.x86_64
>               qemu-kvm-tools-1.5.3-175.el7_9.5.x86_64
>               ipxe-roms-qemu-20180825-3.git133f4c.el7.noarch
>               qemu-system-microblaze-2.0.0-1.el7.6.x86_64
>               libvirt-daemon-driver-storage-disk-4.5.0-36.el7_9.5.x86_64
>               libvirt-daemon-driver-qemu-4.5.0-36.el7_9.5.x86_64
>           
>

Packages added to the rpm side are the equivs of the dpkg side as far as I'm aware and as numerous docs/blogs/etc imply.  The /bin/qemu-{arm,aarch64} binaries are there, provided by the expected qemu-user package (2.0.0-1.el7.6.x86_64).  But virt-install throws the old "Host does not support any virtualization options for arch {arch}" for any of the expected arch values (arm, arm64, aarch64, etc).  Obviously I've missed a support package on the centos side, but what?