#!/bin/bash

prog="$(basename "$0")"

usage() {
	cat >&2 <<-EOF
	usage: $prog [-h] [-Z POOL]
	  installs nasbeery onto your raspberry pi os
    -Z POOL      Name of the zpool to create (default: tank)
  ---------------------------------------------------------------------------
    (C) 2022     nasbeery installer by bashclub (https://github.com/bashclub)
  ---------------------------------------------------------------------------
	EOF
	exit $1
}

ZPOOL=tank


while getopts "hZ:" opt; do
  case $opt in
    h) usage 0 ;;
    Z) ZPOOL=$OPTARG ;;
    *) usage 1 ;;
  esac
done
shift $((OPTIND-1))

# create zfs filesystems
if [ ! $(zfs list $ZPOOL/docker) ]; then
  zfs create -o com.sun:auto-snapshot=false -o mountpoint=/var/lib/docker $ZPOOL/docker
fi
if [ ! $(zfs list $ZPOOL/portainer) ]; then
  zfs create -o com.sun:auto-snapshot=true -o mountpoint=/portainer $ZPOOL/portainer
fi

# add docker repository
apt-key adv --fetch-keys https://download.docker.com/linux/debian/gpg
echo "deb https://download.docker.com/linux/debian $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

# update package lists and install docker engine + docker-compose
apt update
DEBIAN_FRONTEND=noninteractive DEBIAN_PRIORITY=critical apt install -y -qq --no-install-recommends docker-ce docker-ce-cli containerd.io docker-compose

# install portainer
cd /portainer
mkdir -p data
cat << EOF > /portainer/docker-compose.yml
version: '3.2'
services:
  portainer:
    image: portainer/portainer-ce
    ports:
      - "9443:9443"
      - "8000:8000"
    volumes:
      - /portainer/data:/data
      - /var/run/docker.sock:/var/run/docker.sock
    restart: always
EOF
# start portainer
docker-compose up -d