NetVM: edge provisioning script (sudoers allowlist for operator)

2026-10-03 00:05:14 -04:00
parent 0f2a87b08a
commit e20f6cf665
2 changed files with 53 additions and 0 deletions
@@ -0,0 +1,52 @@
+#!/usr/bin/env bash
+# netvm-provision-edge.sh — prepare an edge device for operator-managed NetVM.
+# Run ON the edge device as a user with sudo (interactive sudo is fine).
+# Idempotent: safe to re-run. Every edge device provisioned this way looks
+# identical, so the operator uses one command everywhere.
+set -euo pipefail
+
+OPERATOR_USER="${OPERATOR_USER:-$(whoami)}"
+REPO="$HOME/Projects/NetVM"
+SUDOERS_FILE="/etc/sudoers.d/netvm-operator"
+
+echo "== NetVM edge provisioning (operator user: $OPERATOR_USER) =="
+
+# 1. prerequisites (best-effort install for the common missing piece: wg)
+if ! "$REPO/bin/netvm-verify.sh"; then
+  echo "-- installing missing packages --"
+  if command -v pacman >/dev/null 2>&1; then
+    sudo pacman -S --noconfirm --needed wireguard-tools
+  elif command -v apt-get >/dev/null 2>&1; then
+    sudo apt-get update && sudo apt-get install -y wireguard
+  else
+    echo "install wireguard-tools manually, then re-run"; exit 1
+  fi
+  "$REPO/bin/netvm-verify.sh"
+fi
+
+# 2. repo must be here (sync over Tailscale first on non-laptop nodes)
+[ -x "$REPO/bin/netvm-node-up.sh" ] || { echo "NetVM repo not at $REPO — sync it here first"; exit 1; }
+
+# 3. sudoers allowlist: exact lifecycle scripts only, never blanket root
+sudo tee "$SUDOERS_FILE" > /dev/null << SUDOERS
+# NetVM operator lifecycle access — managed by netvm-provision-edge.sh.
+# Lets the operator user bring node egress up/down and read topology.
+# WireGuard configs in /etc/netvm stay root-only; these scripts never print them.
+$OPERATOR_USER ALL=(root) NOPASSWD: $REPO/bin/netvm-node-up.sh *, $REPO/bin/netvm-node-down.sh *, $REPO/bin/netvm-topology.sh
+SUDOERS
+sudo chmod 440 "$SUDOERS_FILE"
+sudo visudo -c -f "$SUDOERS_FILE" > /dev/null && echo "ok: sudoers valid"
+
+# 4. dir for human-placed WireGuard identities
+sudo mkdir -p /etc/netvm
+sudo chmod 700 /etc/netvm
+echo "ok: /etc/netvm ready"
+
+# 5. tailnet check
+tailscale status >/dev/null 2>&1 && echo "ok: tailscale up" || echo "NOTE: tailscale not up — run: tailscale up"
+
+echo
+echo "Done. Human next step: place this node's WireGuard config at"
+echo "  /etc/netvm/<node>.conf   (root-owned, 0600; wgcf-generated)"
+echo "Operator usage from anywhere on the tailnet:"
+echo "  ssh ${OPERATOR_USER}@<tail-ip> 'sudo -n $REPO/bin/netvm-node-up.sh <node>'"