i am tryng to join docker to a swarm in a raspberry pi cluster. but it fails to connect to the swarm.
i have run the command on a fresh install of raspbian and docker.
i get the error:
sudo docker swarm join --token SWMTKN-1-21cr61rgp0th4sr8g8jxdm8cmd2jyvdzdnjg8qjrsrve3887sy-bs1rhj7nru96982kv0juay2ed 192,168.1.2:2377 Error response from daemon: rpc error: code = Unavailable desc = grpc: the connection is unavailable
does anyone know what could be causing this?