If you run into the issue, that DNS Resolving is not possible with K3S, Rancher, OpenSuSE MicroOS and SELinux enabled:
Please make sure, that the following Settings at K3S SystemD Unit are enabled:
ExecStart=/usr/local/bin/k3s \
You are using two yubikeys e.g. one OTP Key and a Yubikey BIO with FIDO and want to login over SSH?
This Problem "error: process_sign_request2: sshkey_sign: device not found" occurs by running ssh-askpass for prompting to "touch-required / Fingerprint".
Please plug out the other OTP Yubikey and then the Yubikey BIO with FIDO Auth is working fine for you!