Arm architectures, especially the one on an old raspberry pi b+ (running armhf or armel due to some technical magic). I want to use the old pi as a node in a k

Arm architectures, especially the one on an old raspberry pi b+ (running armhf or armel due to some technical magic). I want to use the old pi as a node in a k3s (lightweight kubernetes distro) cluster but the current releases won’t run. I’m currently reading up on qemu and the k3s build process (which to me seems kinda convoluted).