On alpine 3.16 k3s miss cni plugin "flannel"
In fact, /usr/libexec/cni/flannel-amd64 exists, but k3s only look at /usr/libexec/cni/flannel. Thus, the following error messages:
Failed to create pod sandbox: rpc error: code = Unknown desc = failed to setup network for sandbox "5e42af42c8dde91e1b5aef8f9dc9ba0590e96814f7b3b3d26920e885ce7a956a": plugin type="flannel" failed (add): failed to find plugin "flannel" in path [/usr/libexec/cni]