~/bin/labbox

labbox

#!/bin/bash
set -euo pipefail

vmname=$1

PROXY=dns
DOMAIN=lab

vboxmanage clonevm node --snapshot cleanup --options link --name $vmname --register
vboxmanage guestproperty set $vmname hostname $vmname
vboxmanage guestproperty set $vmname hostname $vmname

# check if $PROXY is already running
vboxmanage list runningvms | grep $PROXY

vboxmanage startvm $vmname --type headless

fqdn=${vmname}.${DOMAIN}
cat <<EOF >> ~/.ssh/config
Host $vmname
  Hostname $fqdn
  User root
  ForwardAgent yes
  ProxyCommand ssh -qW %h:%p $PROXY
EOF

# add host key to OUR known_hosts
keyscan_timeout=30  # seconds
host_key=''

echo "Waiting for SSH to come up"
while [[ -z $host_key ]]; do
  host_key=$(ssh $PROXY "ssh-keyscan -T $keyscan_timeout -H $fqdn 2>/dev/null" || echo '')
  echo -n .
  sleep 1
done

echo  # newline

echo $host_key >> ~/.ssh/known_hosts
echo OK