Add support for running in Windows via WSL2

[ckyrouac]

I don't think anyone has tested what happens when trying to run on WSL. It might just work, or need some tweaks.

[KristoferHansson]

I just tried, with WSL2 and VERSION="22.04.3 LTS (Jammy Jellyfish)" and had to spend some time to get it working

started at https://docs.fedoraproject.org/en-US/bootc/getting-started/

❯ podman machine init --rootful --now
Looking up Podman Machine image at quay.io/podman/machine-os:5.1 to create VM
Extracting compressed file: podman-machine-default-amd64.qcow2: done
Image resized.
Machine init complete
Starting machine "podman-machine-default"
Error: qemu exited unexpectedly with exit code 1, stderr: Could not access KVM kernel module: Permission denied
qemu-system-x86_64: -accel kvm: failed to initialize kvm: Permission denied

followed: https://serverfault.com/questions/1043441/how-to-run-kvm-nested-in-wsl2-or-vmware/1115773 to solve kvm issue

installed qemu (via brew) because the initial apt install installed (QEMU emulator version 6.2.0 (Debian 1:6.2+dfsg-2ubuntu6.23)) and that gave me:
qemu-system-x86_64: -netdev stream,id=vlan,addr.type=unix,addr.path=/Users/sopalenski/.colima/default/daemon/gvproxy.sock: Parameter 'type' does not accept value 'stream'`
Updated qemu got me past that issue

❯ qemu-system-x86_64 --version
QEMU emulator version 9.1.1

tried again:
Error: failed to find virtiofsd: exec: "virtiofsd": executable file not found in $PATH
cloned, built and "installed" https://gitlab.com/virtio-fs/virtiofsd because it's no longer included in podman(?)

./podman-bootc run --filesystem=xfs quay.io/centos-bootc/centos-bootc:stream9

Booting the VM...
Error: unable to initialize VM: unable to load existing libvirt domain: virError(Code=38, Domain=7, Message='Failed to connect socket to '/run/user/1000/libvirt/libvirt-sock': No such file or directory')

Solved by:
sudo apt install libvirt-clients libvirt-daemon-system

New error:

Booting the VM...
Error: runBootcVM: unable to start virtual machine domain: virError(Code=1, Domain=0, Message='internal error: Could not run
'/usr/bin/swtpm_setup'. exitstatus: 1; Check error log '/home/kha/.cache/libvirt/qemu/log/podman-bootc-76da7cb48e06-swtpm.log
' for details.')

ran in to some issues with incompatible versions of tpms and swtpm, but eventually solved it by building from source

[root@localhost ~]# bootc status
No staged image present
Current booted image: quay.io/centos-bootc/centos-bootc:stream9
Image version: stream9.20241101.0 (2024-11-01 05:07:24.300680501 UTC)
Image digest: sha256:893b636bbc5725378ce602f222f26c29f51334f93243ae8657d31391634eb024
No rollback image present

[germag]

Hi,

cloned, built and "installed" https://gitlab.com/virtio-fs/virtiofsd because it's no longer included in podman(?)

yes, (at least in fedora) you need to install the podman-machine subpackage to install all the dependencies for podman machine