#!/bin/bash

# This script will create and fire up a standard debian buster lxc container on your Proxmox VE.
# On a Proxmox cluster, the script will create the container on the local node, where it's executed.
# The container ID will be automatically assigned by increasing (+1) the highest number of
# existing LXC containers in your environment. If the assigned ID is already taken by a VM
# or no containers exist yet, the script falls back to the ID 100.

# Authors:
# (C) 2021 Idea an concept by Christian Zengel <christian@sysops.de>
# (C) 2021 Script design and prototype by Markus Helmke <m.helmke@nettwarker.de>
# (C) 2021 Script rework and documentation by Thorsten Spille <thorsten@spille-edv.de>

# IMPORTANT NOTE:
# Please adjust th settings in 'zamba.conf' to your needs before running the script

############### ZAMBA INSTALL SCRIPT ###############
prog="$(basename "$0")"

usage() {
	cat >&2 <<-EOF
	usage: $prog [-h] [-i CTID] [-s SERVICE] [-c CFGFILE]
	  installs a preconfigured lxc container on your proxmox server
    -i CTID      provide a container id instead of auto detection
    -s SERVICE   provide the service name and skip the selection dialog
    -c CFGFILE   use a different config file than 'zamba.conf'
    -h           displays this help text
  ---------------------------------------------------------------------------
    (C) 2021     zamba-lxc-toolbox by bashclub (https://github.com/bashclub)
  ---------------------------------------------------------------------------

	EOF
	exit $1
}

ctid=0
service=ask
config=$PWD/conf/zamba.conf
verbose=0

while getopts "hi:s:c:" opt; do
  case $opt in
    h) usage 0 ;;
    i) ctid=$OPTARG ;;
    s) service=$OPTARG ;;
    c) config=$OPTARG ;;
    *) usage 1 ;;
  esac
done
shift $((OPTIND-1))

# Load configuration file
echo "Loading config file '$config'..."
source $config

# Check config Settings
echo "Check Setting 'Timezone'"
if [[ $LXC_TIMEZONE != $(timedatectl list-timezones | grep $LXC_TIMEZONE) ]]; then
  echo "Unknown LXC_TIMEZONE setting (list available Timezones 'timedatectl list-timezones')"; exit 0
fi
echo "Check Setting 'Template Storage'"
pvstorage=$(pvesh get storage --noborder --noheader);
if [[ $LXC_TEMPLATE_STORAGE != $(echo "$pvstorage" | grep $LXC_TEMPLATE_STORAGE$) ]]; then
  echo "Unknown LXC_TEMPLATE_STORAGE, please check your storage name"; exit 0
fi
echo "Check Setting 'Rootfs Storage'"
if [[ $LXC_ROOTFS_STORAGE != $(echo "$pvstorage" | grep $LXC_ROOTFS_STORAGE$) ]]; then
  echo "Unknown LXC_ROOTFS_STORAGE, please check your storage name"; exit 0
fi
echo "Check Setting 'Sharefs Storage'"
if [[ $LXC_SHAREFS_STORAGE != $(echo "$pvstorage" | grep $LXC_SHAREFS_STORAGE$) ]]; then
  echo "Unknown LXC_SHAREFS_STORAGE, please check your storage name"; exit 0
fi
echo -e "Settings \e[0;92mOK\e[0m"


OPTS=$(ls -d $PWD/src/*/ | grep -v __ | xargs basename -a)

valid=0
if [[ "$service" == "ask" ]]; then
  select svc in $OPTS quit; do
    if [[ "$svc" != "quit" ]]; then
       for line in $(echo $OPTS); do
        if [[ "$svc" == "$line" ]]; then
          service=$svc
          echo "Installation of $service selected."
          valid=1
          break
        fi
      done
    else
      echo "Selected 'quit' exiting without action..."
      exit 0
    fi
    if [[ "$valid" == "1" ]]; then
      break
    fi
  done
else
  for line in $(echo $OPTS); do
    if [[ "$service" == "$line" ]]; then
      echo "Installation of $service selected."
      valid=1
      break
    fi
  done
fi

if [[ "$valid" != "1" ]]; then
  echo "Invalid option, exiting..."
  usage 1
fi

source $config
source $PWD/src/$service/constants-service.conf
LXC_HOSTNAME="${LXC_HOSTNAME/-/}"

# Check is the newest template available, else download it.
DEB_LOC=$(pveam list $LXC_TEMPLATE_STORAGE | grep debian-10-standard | cut -d'_' -f2)
DEB_REP=$(pveam available --section system | grep debian-10-standard | cut -d'_' -f2)

if [[ $DEB_LOC == $DEB_REP ]];
then
  echo "Newest Version of Debian 10 Standard $DEP_REP exists.";
else
  echo "Will now download newest Debian 10 Standard $DEP_REP.";
  pveam download $LXC_TEMPLATE_STORAGE debian-10-standard_$DEB_REP\_amd64.tar.gz
fi

if [ $ctid -gt 99 ]; then
  LXC_CHK=$ctid
else
  # Get next free LXC-number
  LXC_LST=$( lxc-ls -1 | tail -1 )
  LXC_CHK=$((LXC_LST+1));
fi

if  [ $LXC_CHK -lt 100 ] || [ -f /etc/pve/qemu-server/$LXC_CHK.conf ]; then
  LXC_NBR=$(pvesh get /cluster/nextid);
else
  LXC_NBR=$LXC_CHK;
fi
echo "Will now create LXC Container $LXC_NBR!";

# Create the container
pct create $LXC_NBR -unprivileged $LXC_UNPRIVILEGED $LXC_TEMPLATE_STORAGE:vztmpl/debian-10-standard_$DEB_REP\_amd64.tar.gz -rootfs $LXC_ROOTFS_STORAGE:$LXC_ROOTFS_SIZE;
sleep 2;

# Check vlan configuration
if [[ $LXC_VLAN != "" ]];then VLAN=",tag=$LXC_VLAN"; else VLAN=""; fi
# Reconfigure conatiner
PVE_VER=$(pveversion | grep 'pve-manager' | cut -d'/' -f2 | sed 's/[^0-9]//g')
pct set $LXC_NBR -memory $LXC_MEM -swap $LXC_SWAP -hostname $LXC_HOSTNAME -onboot 1 -features nesting=$LXC_NESTING;
# timezone switch added in Version 6.3
if [ $PVE_VER -gt 630 ];then pct set $LXC_NBR -timezone $LXC_TIMEZONE;fi
if [ $LXC_DHCP == true ]; then
 pct set $LXC_NBR -net0 name=eth0,bridge=$LXC_BRIDGE,ip=dhcp,type=veth$VLAN;
else
 pct set $LXC_NBR -net0 name=eth0,bridge=$LXC_BRIDGE,firewall=1,gw=$LXC_GW,ip=$LXC_IP,type=veth$VLAN -nameserver $LXC_DNS -searchdomain $LXC_DOMAIN;
fi
sleep 2

if [ $LXC_MP -gt 0 ]; then
  pct set $LXC_NBR -mp0 $LXC_SHAREFS_STORAGE:$LXC_SHAREFS_SIZE,mp=/$LXC_SHAREFS_MOUNTPOINT
fi
sleep 2;

PS3="Select the Server-Function: "

pct start $LXC_NBR;
sleep 5;
# Set the root password and key
echo -e "$LXC_PWD\n$LXC_PWD" | lxc-attach -n$LXC_NBR passwd;
lxc-attach -n$LXC_NBR mkdir /root/.ssh;
pct push $LXC_NBR $LXC_AUTHORIZED_KEY /root/.ssh/authorized_keys
pct push $LXC_NBR $PWD/src/sources.list /etc/apt/sources.list
pct push $LXC_NBR $config /root/zamba.conf
pct push $LXC_NBR $PWD/src/constants.conf /root/constants.conf
pct push $LXC_NBR $PWD/src/lxc-base.sh /root/lxc-base.sh
pct push $LXC_NBR $PWD/src/$service/install-service.sh /root/install-service.sh
pct push $LXC_NBR $PWD/src/$service/constants-service.conf /root/constants-service.conf

echo "Installing basic container setup..."
lxc-attach -n$LXC_NBR bash /root/lxc-base.sh
echo "Install '$service'!"
lxc-attach -n$LXC_NBR bash /root/install-service.sh

summary=$(pct exec $LXC_NBR -- bash -c '[ -f /root/summary ] && cat /root/summary')
if [[ $summary != "" ]];then pct set $LXC_NBR --description="$(echo -e "$summary")"; fi

if [[ $service == "zmb-ad" ]]; then
  pct stop $LXC_NBR
  pct set $LXC_NBR \-nameserver $(echo $LXC_IP | cut -d'/' -f 1)
  pct start $LXC_NBR
fi

# timezone switch added in Version 6.3
if [ $PVE_VER -lt 630 ]; then echo "echo "$LXC_TIMEZONE" > /etc/timezone" | pct enter $LXC_NBR; fi