Is there an rsync service for rpm.rancher.io? I'd like to mirror the k3s packages to a repo in my network. (It's something that I've done for an openSUSE mirror)

No, it's hosted on S3 so you can't just rsync it. You'd need to use something that is rpm-repo aware.

Thanks. I've been playing with reposync, but it is only downloading the rpms so II guess I'll have to build the repo metadata and copy the gpg key manually. All this to move off K3OS to MicroOS. I'll check out Elemental later in case that solves my install/config/deploy woes.