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Add script to install Tailscale in LXC containers
This script installs Tailscale in an existing LXC container on Proxmox VE, handling both Alpine and Debian/Ubuntu distributions, and updates the container configuration accordingly.
This commit is contained in:
CanbiZ (MickLesk)
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171
tools/addon/add-tailscale-lxc.sh
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171
tools/addon/add-tailscale-lxc.sh
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#!/usr/bin/env bash
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# Copyright (c) 2021-2026 tteck
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# Author: tteck (tteckster)
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# License: MIT | https://github.com/community-scripts/ProxmoxVE/raw/main/LICENSE
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# Source: https://tailscale.com/ | Github: https://github.com/tailscale/tailscale
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set -Eeuo pipefail
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trap 'echo -e "\n[ERROR] in line $LINENO: exit code $?"' ERR
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function header_info() {
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clear
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cat <<"EOF"
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______ _ __ __
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/_ __/___ _(_) /_____________ _/ /__
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/ / / __ `/ / / ___/ ___/ __ `/ / _ \
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/ / / /_/ / / (__ ) /__/ /_/ / / __/
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/_/ \__,_/_/_/____/\___/\__,_/_/\___/
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EOF
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}
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function msg_info() { echo -e " \e[1;36m➤\e[0m $1"; }
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function msg_ok() { echo -e " \e[1;32m✔\e[0m $1"; }
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function msg_error() { echo -e " \e[1;31m✖\e[0m $1"; }
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# Telemetry
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source <(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/misc/api.func) 2>/dev/null || true
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declare -f init_tool_telemetry &>/dev/null && init_tool_telemetry "add-tailscale-lxc" "addon"
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header_info
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if ! command -v pveversion &>/dev/null; then
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msg_error "This script must be run on the Proxmox VE host (not inside an LXC container)"
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exit 1
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fi
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while true; do
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read -rp "This will add Tailscale to an existing LXC Container ONLY. Proceed (y/n)? " yn
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case "$yn" in
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[Yy]*) break ;;
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[Nn]*) exit 0 ;;
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*) echo "Please answer yes or no." ;;
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esac
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done
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header_info
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msg_info "Loading container list..."
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NODE=$(hostname)
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MSG_MAX_LENGTH=0
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CTID_MENU=()
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while read -r line; do
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TAG=$(echo "$line" | awk '{print $1}')
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ITEM=$(echo "$line" | awk '{print substr($0,36)}')
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OFFSET=2
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((${#ITEM} + OFFSET > MSG_MAX_LENGTH)) && MSG_MAX_LENGTH=$((${#ITEM} + OFFSET))
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CTID_MENU+=("$TAG" "$ITEM" "OFF")
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done < <(pct list | awk 'NR>1')
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CTID=""
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while [[ -z "${CTID}" ]]; do
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CTID=$(whiptail --backtitle "Proxmox VE Helper Scripts" --title "Containers on $NODE" --radiolist \
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"\nSelect a container to add Tailscale to:\n" \
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16 $((MSG_MAX_LENGTH + 23)) 6 \
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"${CTID_MENU[@]}" 3>&1 1>&2 2>&3) || exit 1
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done
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CTID_CONFIG_PATH="/etc/pve/lxc/${CTID}.conf"
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# Skip if already configured
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grep -q "lxc.cgroup2.devices.allow: c 10:200 rwm" "$CTID_CONFIG_PATH" || echo "lxc.cgroup2.devices.allow: c 10:200 rwm" >>"$CTID_CONFIG_PATH"
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grep -q "lxc.mount.entry: /dev/net/tun" "$CTID_CONFIG_PATH" || echo "lxc.mount.entry: /dev/net/tun dev/net/tun none bind,create=file" >>"$CTID_CONFIG_PATH"
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header_info
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msg_info "Installing Tailscale in CT $CTID"
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pct exec "$CTID" -- sh -c '
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set -e
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# Detect OS inside container
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if [ -f /etc/alpine-release ]; then
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# ── Alpine Linux ──
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echo "[INFO] Alpine Linux detected, installing Tailscale via apk..."
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# Enable community repo if not already enabled
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if ! grep -q "^[^#].*community" /etc/apk/repositories 2>/dev/null; then
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ALPINE_VERSION=$(cat /etc/alpine-release | cut -d. -f1,2)
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echo "https://dl-cdn.alpinelinux.org/alpine/v${ALPINE_VERSION}/community" >> /etc/apk/repositories
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fi
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apk update
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apk add --no-cache tailscale
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# Enable and start Tailscale service
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rc-update add tailscale default 2>/dev/null || true
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rc-service tailscale start 2>/dev/null || true
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else
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# ── Debian / Ubuntu ──
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export DEBIAN_FRONTEND=noninteractive
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# Source os-release properly (handles quoted values)
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. /etc/os-release
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# Fallback if DNS is poisoned or blocked
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ORIG_RESOLV="/etc/resolv.conf"
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BACKUP_RESOLV="/tmp/resolv.conf.backup"
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# Check DNS resolution using multiple methods (dig may not be installed)
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dns_check_failed=true
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if command -v dig >/dev/null 2>&1; then
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if dig +short pkgs.tailscale.com 2>/dev/null | grep -qvE "^127\.|^0\.0\.0\.0$|^$"; then
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dns_check_failed=false
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fi
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elif command -v host >/dev/null 2>&1; then
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if host pkgs.tailscale.com 2>/dev/null | grep -q "has address"; then
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dns_check_failed=false
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fi
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elif command -v nslookup >/dev/null 2>&1; then
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if nslookup pkgs.tailscale.com 2>/dev/null | grep -q "Address:"; then
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dns_check_failed=false
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fi
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elif command -v getent >/dev/null 2>&1; then
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if getent hosts pkgs.tailscale.com >/dev/null 2>&1; then
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dns_check_failed=false
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fi
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else
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# No DNS tools available, try curl directly and assume DNS works
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dns_check_failed=false
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fi
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if $dns_check_failed; then
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echo "[INFO] DNS resolution for pkgs.tailscale.com failed (blocked or redirected)."
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echo "[INFO] Temporarily overriding /etc/resolv.conf with Cloudflare DNS (1.1.1.1)"
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cp "$ORIG_RESOLV" "$BACKUP_RESOLV"
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echo "nameserver 1.1.1.1" >"$ORIG_RESOLV"
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fi
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if ! command -v curl >/dev/null 2>&1; then
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echo "[INFO] curl not found, installing..."
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apt-get update -qq
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apt-get install -y curl >/dev/null
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fi
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# Ensure keyrings directory exists
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mkdir -p /usr/share/keyrings
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curl -fsSL "https://pkgs.tailscale.com/stable/${ID}/${VERSION_CODENAME}.noarmor.gpg" \
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| tee /usr/share/keyrings/tailscale-archive-keyring.gpg >/dev/null
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echo "deb [signed-by=/usr/share/keyrings/tailscale-archive-keyring.gpg] https://pkgs.tailscale.com/stable/${ID} ${VERSION_CODENAME} main" \
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>/etc/apt/sources.list.d/tailscale.list
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apt-get update -qq
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apt-get install -y tailscale >/dev/null
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if [ -f /tmp/resolv.conf.backup ]; then
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echo "[INFO] Restoring original /etc/resolv.conf"
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mv /tmp/resolv.conf.backup /etc/resolv.conf
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fi
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fi
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'
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TAGS=$(awk -F': ' '/^tags:/ {print $2}' "$CTID_CONFIG_PATH")
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TAGS="${TAGS:+$TAGS; }tailscale"
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pct set "$CTID" -tags "$TAGS"
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msg_ok "Tailscale installed on CT $CTID"
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msg_info "Reboot the container, then run 'tailscale up' inside the container to activate."
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