Proxmox/misc/add-tailscale-lxc.sh

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#!/usr/bin/env bash
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# Copyright (c) 2021-2023 tteck
# Author: tteck (tteckster)
# License: MIT
# https://github.com/tteck/Proxmox/raw/main/LICENSE
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function header_info {
cat <<"EOF"
______ _ __ __
/_ __/___ _(_) /_____________ _/ /__
/ / / __ `/ / / ___/ ___/ __ `/ / _ \
/ / / /_/ / / (__ ) /__/ /_/ / / __/
/_/ \__,_/_/_/____/\___/\__,_/_/\___/
EOF
}
clear
header_info
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while true; do
read -p "This will add Tailscale to an existing LXC Container ONLY. Proceed(y/n)?" yn
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case $yn in
[Yy]*) break ;;
[Nn]*) exit ;;
*) echo "Please answer yes or no." ;;
esac
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done
set -o errexit
set -o errtrace
set -o nounset
set -o pipefail
shopt -s expand_aliases
alias die='EXIT=$? LINE=$LINENO error_exit'
trap die ERR
function error_exit() {
trap - ERR
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local reason="Unknown failure occured."
local msg="${1:-$reason}"
local flag="\e[1;31m‼ ERROR\e[0m $EXIT@$LINE"
echo -e "$flag $msg" 1>&2
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exit $EXIT
}
function msg() {
local TEXT="$1"
echo -e "$TEXT"
}
NODE=$(hostname)
while read -r line; do
TAG=$(echo "$line" | awk '{print $1}')
ITEM=$(echo "$line" | awk '{print substr($0,36)}')
OFFSET=2
if [[ $((${#ITEM} + $OFFSET)) -gt ${MSG_MAX_LENGTH:-} ]]; then
MSG_MAX_LENGTH=$((${#ITEM} + $OFFSET))
fi
CTID_MENU+=("$TAG" "$ITEM " "OFF")
done < <(pct list | awk 'NR>1')
while [ -z "${CTID:+x}" ]; do
CTID=$(whiptail --title "Containers on $NODE" --radiolist \
"\nSelect a container to add Tailscale to:\n" \
16 $(($MSG_MAX_LENGTH + 23)) 6 \
"${CTID_MENU[@]}" 3>&1 1>&2 2>&3) || exit
done
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CTID_CONFIG_PATH=/etc/pve/lxc/${CTID}.conf
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cat <<EOF >>$CTID_CONFIG_PATH
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lxc.cgroup2.devices.allow: c 10:200 rwm
lxc.mount.entry: /dev/net/tun dev/net/tun none bind,create=file
EOF
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msg "Installing Tailscale..."
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lxc-attach -n $CTID -- bash -c "$(curl -fsSL https://tailscale.com/install.sh)" &>/dev/null || exit
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msg "Installed Tailscale"
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sleep 2
msg "\e[1;32m ✔ Completed Successfully!\e[0m"
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msg "\e[1;31m Reboot ${CTID} LXC to apply the changes, then run tailscale up in the LXC console\e[0m"