#!/bin/bash

# Debug stuff
set -o errexit;
set -o pipefall;
set -o nounset;
set -o xtrace;

# Add repo, package and service
sudo add-apt-repository ppa:gluster/glusterfs-4.1
sudo apt install glusterfs-server
sudo systemctl enable --now glusterd

# Create share point
mkdir -p /gfs/.brick

# Figure out if I'm the master
jq -c '.nodes[]' nodes.json | while read i; do
  COMPAREHOSTNAME=echo $i | jq -r '.hostname'
  if [ $HOSTNAME -eq $COMPAREHOSTNAME ]; then
    MASTER=echo $i | jq -r '.master'
  fi
done

# Do master-only setup
if [ $MASTER = true ]; then
  declare MNTLIST=""
  jq -c '.nodes[]' nodes.json | while read i; do
    COMPAREHOSTNAME=echo $i | jq -r '.hostname'
    NODEIP=$(echo $i | jq -r '.ip')
    # Probe other nodes
    if [ $HOSTNAME -ne $COMPAREHOSTNAME ]; then
      sudo gluster peer probe $NODEIP
    fi
    MNTLIST="$MNTLIST $NODEIP:/gfs/.brick"
  done

  # Apply volume on all nodes
  sudo gluster volume create data replica 4 transport tcp $MNTLIST

  # Start the volume
  sudo gluster volume start data
fi