Others use in ~/.ssh/config: 
                                                   
Host *.lxd                                                                      
   StrictHostKeyChecking no                                                     
   UserKnownHostsFile /dev/null                                                 
   ProxyCommand nc $(lxc list -c s4 $(echo %h | sed "s/\.lxd//g") %h | grep RUNNING | cut -d' ' -f4) %p