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#!/usr/bin/env bash
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# Setup script environment
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set -o errexit #Exit immediately if a pipeline returns a non-zero status
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set -o errtrace #Trap ERR from shell functions, command substitutions, and commands from subshell
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set -o nounset #Treat unset variables as an error
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set -o pipefail #Pipe will exit with last non-zero status if applicable
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shopt -s expand_aliases
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alias die='EXIT=$? LINE=$LINENO error_exit'
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trap die ERR
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trap cleanup EXIT
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function error_exit() {
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trap - ERR
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local DEFAULT='Unknown failure occured.'
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local REASON="\e[97m${1:-$DEFAULT}\e[39m"
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local FLAG="\e[91m[ERROR] \e[93m$EXIT@$LINE"
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msg "$FLAG $REASON"
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[ ! -z ${CTID-} ] && cleanup_ctid
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exit $EXIT
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}
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function warn() {
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local REASON="\e[97m$1\e[39m"
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local FLAG="\e[93m[WARNING]\e[39m"
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msg "$FLAG $REASON"
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}
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function info() {
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local REASON="$1"
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local FLAG="\e[36m[INFO]\e[39m"
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msg "$FLAG $REASON"
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}
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function msg() {
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local TEXT="$1"
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echo -e "$TEXT"
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}
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function cleanup_ctid() {
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if [ ! -z ${MOUNT+x} ]; then
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pct unmount $CTID
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fi
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if $(pct status $CTID &>/dev/null); then
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if [ "$(pct status $CTID | awk '{print $2}')" == "running" ]; then
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pct stop $CTID
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fi
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pct destroy $CTID
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elif [ "$(pvesm list $STORAGE --vmid $CTID)" != "" ]; then
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pvesm free $ROOTFS
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fi
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}
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function cleanup() {
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popd >/dev/null
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rm -rf $TEMP_DIR
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}
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function load_module() {
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if ! $(lsmod | grep -Fq $1); then
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modprobe $1 &>/dev/null || \
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die "Failed to load '$1' module."
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fi
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MODULES_PATH=/etc/modules
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if ! $(grep -Fxq "$1" $MODULES_PATH); then
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echo "$1" >> $MODULES_PATH || \
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die "Failed to add '$1' module to load at boot."
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fi
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}
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TEMP_DIR=$(mktemp -d)
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pushd $TEMP_DIR >/dev/null
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# Download setup script
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wget -qL https://raw.githubusercontent.com/tteck/Proxmox/main/mqtt_setup.sh
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# Detect modules and automatically load at boot
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#load_module aufs
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load_module overlay
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# Select storage location
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while read -r line; do
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TAG=$(echo $line | awk '{print $1}')
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TYPE=$(echo $line | awk '{printf "%-10s", $2}')
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FREE=$(echo $line | numfmt --field 4-6 --from-unit=K --to=iec --format %.2f | awk '{printf( "%9sB", $6)}')
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ITEM=" Type: $TYPE Free: $FREE "
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OFFSET=2
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if [[ $((${#ITEM} + $OFFSET)) -gt ${MSG_MAX_LENGTH:-} ]]; then
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MSG_MAX_LENGTH=$((${#ITEM} + $OFFSET))
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fi
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STORAGE_MENU+=( "$TAG" "$ITEM" "OFF" )
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done < <(pvesm status -content rootdir | awk 'NR>1')
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if [ $((${#STORAGE_MENU[@]}/3)) -eq 0 ]; then
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warn "'Container' needs to be selected for at least one storage location."
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die "Unable to detect valid storage location."
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elif [ $((${#STORAGE_MENU[@]}/3)) -eq 1 ]; then
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STORAGE=${STORAGE_MENU[0]}
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else
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while [ -z "${STORAGE:+x}" ]; do
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STORAGE=$(whiptail --title "Storage Pools" --radiolist \
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"Which storage pool you would like to use for the container?\n\n" \
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16 $(($MSG_MAX_LENGTH + 23)) 6 \
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"${STORAGE_MENU[@]}" 3>&1 1>&2 2>&3) || exit
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done
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fi
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info "Using '$STORAGE' for storage location."
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# Get the next guest VM/LXC ID
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CTID=$(pvesh get /cluster/nextid)
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info "Container ID is $CTID."
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# Download latest Debian 10 LXC template
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msg "Updating LXC template list..."
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pveam update >/dev/null
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msg "Downloading LXC template..."
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OSTYPE=debian
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OSVERSION=${OSTYPE}-10
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mapfile -t TEMPLATES < <(pveam available -section system | sed -n "s/.*\($OSVERSION.*\)/\1/p" | sort -t - -k 2 -V)
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TEMPLATE="${TEMPLATES[-1]}"
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pveam download local $TEMPLATE >/dev/null ||
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die "A problem occured while downloading the LXC template."
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# Create variables for container disk
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STORAGE_TYPE=$(pvesm status -storage $STORAGE | awk 'NR>1 {print $2}')
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case $STORAGE_TYPE in
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dir|nfs)
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DISK_EXT=".raw"
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DISK_REF="$CTID/"
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;;
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zfspool)
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DISK_PREFIX="subvol"
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DISK_FORMAT="subvol"
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;;
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esac
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DISK=${DISK_PREFIX:-vm}-${CTID}-disk-0${DISK_EXT-}
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ROOTFS=${STORAGE}:${DISK_REF-}${DISK}
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# Create LXC
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msg "Creating LXC container..."
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DISK_SIZE=2G
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pvesm alloc $STORAGE $CTID $DISK $DISK_SIZE --format ${DISK_FORMAT:-raw} >/dev/null
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if [ "$STORAGE_TYPE" == "zfspool" ]; then
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warn "Some containers may not work properly due to ZFS not supporting 'fallocate'."
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else
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mkfs.ext4 $(pvesm path $ROOTFS) &>/dev/null
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fi
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ARCH=$(dpkg --print-architecture)
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HOSTNAME=mqtt
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TEMPLATE_STRING="local:vztmpl/${TEMPLATE}"
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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 \
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-ostype $OSTYPE -rootfs $ROOTFS,size=$DISK_SIZE -storage $STORAGE >/dev/null
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# Set container timezone to match host
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MOUNT=$(pct mount $CTID | cut -d"'" -f 2)
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ln -fs $(readlink /etc/localtime) ${MOUNT}/etc/localtime
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pct unmount $CTID && unset MOUNT
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# Setup container
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msg "Starting LXC container..."
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pct start $CTID
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pct push $CTID mqtt_setup.sh /mqtt_setup.sh -perms 755
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pct exec $CTID /mqtt_setup.sh
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# Get network details and show completion message
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IP=$(pct exec $CTID ip a s dev eth0 | sed -n '/inet / s/\// /p' | awk '{print $2}')
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info "Successfully created a MQTT LXC Container to $CTID at IP Address ${IP}"
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@ -0,0 +1,67 @@
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#!/usr/bin/env bash
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# Setup script environment
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set -o errexit #Exit immediately if a pipeline returns a non-zero status
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set -o errtrace #Trap ERR from shell functions, command substitutions, and commands from subshell
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set -o nounset #Treat unset variables as an error
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set -o pipefail #Pipe will exit with last non-zero status if applicable
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shopt -s expand_aliases
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alias die='EXIT=$? LINE=$LINENO error_exit'
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trap die ERR
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trap 'die "Script interrupted."' INT
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function error_exit() {
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trap - ERR
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local DEFAULT='Unknown failure occured.'
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local REASON="\e[97m${1:-$DEFAULT}\e[39m"
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local FLAG="\e[91m[ERROR:LXC] \e[93m$EXIT@$LINE"
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msg "$FLAG $REASON"
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exit $EXIT
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}
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function msg() {
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local TEXT="$1"
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echo -e "$TEXT"
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}
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# Prepare container OS
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msg "Setting up container OS..."
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sed -i "/$LANG/ s/\(^# \)//" /etc/locale.gen
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locale-gen >/dev/null
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apt-get -y purge openssh-{client,server} >/dev/null
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apt-get autoremove >/dev/null
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# Update container OS
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msg "Updating container OS..."
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apt-get update >/dev/null
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apt-get -qqy upgrade &>/dev/null
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# Install prerequisites
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msg "Installing Prerequisites..."
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apt-get -qqy install \
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curl \
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sudo &>/dev/null
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# Installing Mosquitto MQTT broker
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msg "Installing Mosquitto MQTT broker.."
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sudo apt-get update >/dev/null
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sudo apt-get -y install mosquitto &>/dev/null
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sudo apt-get -y install mosquitto-clients &>/dev/null
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# Customize container
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msg "Customizing container..."
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rm /etc/motd # Remove message of the day after login
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rm /etc/update-motd.d/10-uname # Remove kernel information after login
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touch ~/.hushlogin # Remove 'Last login: ' and mail notification after login
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GETTY_OVERRIDE="/etc/systemd/system/container-getty@1.service.d/override.conf"
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mkdir -p $(dirname $GETTY_OVERRIDE)
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cat << EOF > $GETTY_OVERRIDE
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[Service]
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ExecStart=
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ExecStart=-/sbin/agetty --autologin root --noclear --keep-baud tty%I 115200,38400,9600 \$TERM
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EOF
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systemctl daemon-reload
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systemctl restart $(basename $(dirname $GETTY_OVERRIDE) | sed 's/\.d//')
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# Cleanup container
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msg "Cleanup..."
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rm -rf /mqtt_setup.sh /var/{cache,log}/* /var/lib/apt/lists/*
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