create-hosts.sh

#!/bin/bash

MASTER=$(echo $(multipass list | grep master | awk '{print $1}'))
WORKERS=$(echo $(multipass list | grep worker | awk '{print $1}'))
NODES+=$MASTER
NODES+=" "
NODES+=$WORKERS

# seach for existing multipass config
exists=$(grep -n "####### multipass hosts start ##########" hosts | awk -F: '{print $1}' | head -1)
# check if var is empty
if test -z "$exists" 
then
  exists=0
fi

# cut existing config
if (("$exists" > "0")) ; then
  start=$(grep -n "####### multipass hosts start ##########" hosts | awk -F: '{print $1}' | head -1)
  ((start=start-1))
  end=$(grep -n "####### multipass hosts end   ##########" hosts | awk -F: '{print $1}' | head -1)
  sed -i '' ${start},${end}d hosts
fi
# replace with new config
echo "" >> hosts
echo "####### multipass hosts start ##########" >> hosts

for NODE in ${NODES}; do
multipass exec ${NODE} -- bash -c 'echo `ip -4 addr show enp0s2 | grep -oP "(?<=inet ).*(?=/)"` `echo $(hostname)`' >> hosts
done

echo "####### multipass hosts end   ##########" >> hosts