Proxmox/mqtt_container.sh

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#!/usr/bin/env bash
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while true; do
read -p "This will create a New MQTT LXC Container. Proceed(y/n)?" yn
case $yn in
[Yy]* ) break;;
[Nn]* ) exit;;
* ) echo "Please answer yes or no.";;
esac
done
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# Setup script environment
set -o errexit #Exit immediately if a pipeline returns a non-zero status
set -o errtrace #Trap ERR from shell functions, command substitutions, and commands from subshell
set -o nounset #Treat unset variables as an error
set -o pipefail #Pipe will exit with last non-zero status if applicable
shopt -s expand_aliases
alias die='EXIT=$? LINE=$LINENO error_exit'
trap die ERR
trap cleanup EXIT
function error_exit() {
trap - ERR
local DEFAULT='Unknown failure occured.'
local REASON="\e[97m${1:-$DEFAULT}\e[39m"
local FLAG="\e[91m[ERROR] \e[93m$EXIT@$LINE"
msg "$FLAG $REASON"
[ ! -z ${CTID-} ] && cleanup_ctid
exit $EXIT
}
function warn() {
local REASON="\e[97m$1\e[39m"
local FLAG="\e[93m[WARNING]\e[39m"
msg "$FLAG $REASON"
}
function info() {
local REASON="$1"
local FLAG="\e[36m[INFO]\e[39m"
msg "$FLAG $REASON"
}
function msg() {
local TEXT="$1"
echo -e "$TEXT"
}
function cleanup_ctid() {
if [ ! -z ${MOUNT+x} ]; then
pct unmount $CTID
fi
if $(pct status $CTID &>/dev/null); then
if [ "$(pct status $CTID | awk '{print $2}')" == "running" ]; then
pct stop $CTID
fi
pct destroy $CTID
elif [ "$(pvesm list $STORAGE --vmid $CTID)" != "" ]; then
pvesm free $ROOTFS
fi
}
function cleanup() {
popd >/dev/null
rm -rf $TEMP_DIR
}
function load_module() {
if ! $(lsmod | grep -Fq $1); then
modprobe $1 &>/dev/null || \
die "Failed to load '$1' module."
fi
MODULES_PATH=/etc/modules
if ! $(grep -Fxq "$1" $MODULES_PATH); then
echo "$1" >> $MODULES_PATH || \
die "Failed to add '$1' module to load at boot."
fi
}
TEMP_DIR=$(mktemp -d)
pushd $TEMP_DIR >/dev/null
# Download setup script
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wget -qL https://raw.githubusercontent.com/tteck/Proxmox/main/setup/mqtt_setup.sh
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# Detect modules and automatically load at boot
#load_module aufs
load_module overlay
# Select storage location
while read -r line; do
TAG=$(echo $line | awk '{print $1}')
TYPE=$(echo $line | awk '{printf "%-10s", $2}')
FREE=$(echo $line | numfmt --field 4-6 --from-unit=K --to=iec --format %.2f | awk '{printf( "%9sB", $6)}')
ITEM=" Type: $TYPE Free: $FREE "
OFFSET=2
if [[ $((${#ITEM} + $OFFSET)) -gt ${MSG_MAX_LENGTH:-} ]]; then
MSG_MAX_LENGTH=$((${#ITEM} + $OFFSET))
fi
STORAGE_MENU+=( "$TAG" "$ITEM" "OFF" )
done < <(pvesm status -content rootdir | awk 'NR>1')
if [ $((${#STORAGE_MENU[@]}/3)) -eq 0 ]; then
warn "'Container' needs to be selected for at least one storage location."
die "Unable to detect valid storage location."
elif [ $((${#STORAGE_MENU[@]}/3)) -eq 1 ]; then
STORAGE=${STORAGE_MENU[0]}
else
while [ -z "${STORAGE:+x}" ]; do
STORAGE=$(whiptail --title "Storage Pools" --radiolist \
"Which storage pool you would like to use for the container?\n\n" \
16 $(($MSG_MAX_LENGTH + 23)) 6 \
"${STORAGE_MENU[@]}" 3>&1 1>&2 2>&3) || exit
done
fi
info "Using '$STORAGE' for storage location."
# Get the next guest VM/LXC ID
CTID=$(pvesh get /cluster/nextid)
info "Container ID is $CTID."
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# Download latest Debian 11 LXC template
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msg "Updating LXC template list..."
pveam update >/dev/null
msg "Downloading LXC template..."
OSTYPE=debian
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OSVERSION=${OSTYPE}-11
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mapfile -t TEMPLATES < <(pveam available -section system | sed -n "s/.*\($OSVERSION.*\)/\1/p" | sort -t - -k 2 -V)
TEMPLATE="${TEMPLATES[-1]}"
pveam download local $TEMPLATE >/dev/null ||
die "A problem occured while downloading the LXC template."
# Create variables for container disk
STORAGE_TYPE=$(pvesm status -storage $STORAGE | awk 'NR>1 {print $2}')
case $STORAGE_TYPE in
dir|nfs)
DISK_EXT=".raw"
DISK_REF="$CTID/"
;;
zfspool)
DISK_PREFIX="subvol"
DISK_FORMAT="subvol"
;;
esac
DISK=${DISK_PREFIX:-vm}-${CTID}-disk-0${DISK_EXT-}
ROOTFS=${STORAGE}:${DISK_REF-}${DISK}
# Create LXC
msg "Creating LXC container..."
DISK_SIZE=2G
pvesm alloc $STORAGE $CTID $DISK $DISK_SIZE --format ${DISK_FORMAT:-raw} >/dev/null
if [ "$STORAGE_TYPE" == "zfspool" ]; then
warn "Some containers may not work properly due to ZFS not supporting 'fallocate'."
else
mkfs.ext4 $(pvesm path $ROOTFS) &>/dev/null
fi
ARCH=$(dpkg --print-architecture)
HOSTNAME=mqtt
TEMPLATE_STRING="local:vztmpl/${TEMPLATE}"
pct create $CTID $TEMPLATE_STRING -arch $ARCH -features nesting=1 \
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-hostname $HOSTNAME -net0 name=eth0,bridge=vmbr0,ip=dhcp -onboot 1 -cores 1 -memory 512 \
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-ostype $OSTYPE -rootfs $ROOTFS,size=$DISK_SIZE -storage $STORAGE >/dev/null
# Set container timezone to match host
MOUNT=$(pct mount $CTID | cut -d"'" -f 2)
ln -fs $(readlink /etc/localtime) ${MOUNT}/etc/localtime
pct unmount $CTID && unset MOUNT
# Setup container
msg "Starting LXC container..."
pct start $CTID
pct push $CTID mqtt_setup.sh /mqtt_setup.sh -perms 755
pct exec $CTID /mqtt_setup.sh
# Get network details and show completion message
IP=$(pct exec $CTID ip a s dev eth0 | sed -n '/inet / s/\// /p' | awk '{print $2}')
info "Successfully created a MQTT LXC Container to $CTID at IP Address ${IP}"