Proxmox/misc/add-tailscale-lxc.sh

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#!/usr/bin/env bash
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echo -e "\e[1;33mThis script will add Tailscale to an existing LXC Container ONLY\e[0m"
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while true; do
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read -p "Did you replace 106 with your LXC ID? Proceed(y/n)?" yn
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"
}
CTID=$1
CTID_CONFIG_PATH=/etc/pve/lxc/${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..."
lxc-attach -n $CTID -- bash -c "$(curl -fsSL https://tailscale.com/install.sh)" &>/dev/null || exit
msg "⌛ Installed Tailscale"
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"