Btrfs install with additional subvols

[jfabernathy]

Normally the default group of subvolumes that EOS creates at install is fine with me. However, on a system where I plan on running KVM/QEMU I need to create my /var/lib/libvirt/images with NOCOW and in a separate subvol so I don’t get massive snapshots of my VM disk images.

Is there a way to add the subvolumes during install or just wait until EOS is up and running and then add the @images subvol and create the mount point of /var/lib/libvirt/images and edit fstab???

[dalto]

@jfabernathy

Is there a way to add the subvolumes during install

You can edit /etc/calamares/modules/mount.conf and add the subvol there before launching the installer. Just be careful because YAML is very sensitive to spacing and indentation.

@jfabernathy

just wait until EOS is up and running and then add the @images subvol and create the mount point of /var/lib/libvirt/images and edit fstab???

This also works just fine.

Also, this doesn’t require a reinstall unless you want to anyway. You can change the subvols on an existing system whenever you want.

[jfabernathy]

I just spun up a VM with EOS but editing the mount.conf before launching the installer. That worked great and maybe just a little less work than the second method of doing it all after install.

Thanks