mac-multipass-docker.sh

# brew install docker multipass
# # in case docker desktop broke the symlink
# brew link docker

# # ssh key to use
# sshpub=`ls -1tr ~/.ssh/*pub | tail -1`

# cat > cloud-init.yaml <<EOF
# ssh_authorized_keys:
#   - `cat "$sshpub"`
# EOF

# create and set up vm
n=primary
multipass launch --name $n --cloud-init cloud-init.yaml -m 5G -d 10G
multipass exec $n -- sudo apt update -y
multipass exec $n -- sudo apt install -y docker.io
multipass exec $n -- sudo systemctl enable --now docker
multipass exec $n -- sudo adduser ubuntu docker

# setup ssh
ip=`multipass info $n | grep IPv4 | awk '{print $2}'`
ssh-keygen -R $ip
ssh ubuntu@$ip id

# finally
echo export DOCKER_HOST=ssh://ubuntu@$ip

# test
export DOCKER_HOST=ssh://ubuntu@$ip
docker ps

# laptop crashed, instance lost, thanks multipass