ansible/docs/edge-host.md

@@ -29,7 +29,7 @@ Build and boot the dedicated installer image — see
 `images/edge-host-iso/README.md`. Short version:
 
 1. `sudo pacman -S archiso && sudo images/edge-host-iso/build.sh`
-2. Write ISO to a USB stick, boot the target box from it, run `edge-install`
+2. Write ISO to a USB stick, boot the target box from it, run `edge-install <hostname>`
    (partitions the internal disk — NVMe if present, else the eMMC; the
    installer autodetects — installs the ansible-ready base system with SSH
    keys, DHCP, docker — asks for confirmation before wiping).

images/edge-host-iso/README.md

@@ -42,10 +42,11 @@ for the CA key; rebuild the ISO after a CA rotation.
 2. Boot the target from it (UEFI, Secure Boot off; one-time F12/setup
    visit if the box doesn't already boot USB first)
 3. Either on the console (auto-login as root) or headless —
-   `ssh root@<dhcp-ip>` with an owner certificate — run `edge-install`. It auto-detects the internal disk
-   (NVMe, else eMMC — covers the Wyse 3040 — else first non-USB disk),
-   shows the target and requires typing the hostname before wiping
-   anything. Override with `edge-install /dev/sdY`.
+   `ssh root@<dhcp-ip>` with an owner certificate — run
+   `edge-install <hostname>` (e.g. `edge-install edge-2`). It auto-detects
+   the internal disk (NVMe, else eMMC — covers the Wyse 3040 — else first
+   non-USB disk), shows the target and requires typing the hostname before
+   wiping anything. Override with `edge-install <hostname> /dev/sdY`.
 4. Reboot. Confirm the box is reachable by name — `ssh root@<host>` — before
    going further; it is identified by name everywhere and its address is
    never recorded. Then add it to `[edge_host]` in

images/edge-host-iso/airootfs/usr/local/bin/edge-install

@@ -1,13 +1,19 @@
 #!/usr/bin/env bash
-# Installer for edge-1 (bare-metal edge host, replaces the k8s-edge VM).
+# Installer for the bare-metal edge hosts (edge-1, edge-2, ...).
 # Runs from the edge-host ISO live environment. WIPES the target disk.
-# Usage: edge-install [disk]
-# Default: the internal disk — first NVMe, else eMMC (Wyse 3040), else
+# Usage: edge-install <hostname> [disk]
+# Default disk: the internal disk — first NVMe, else eMMC (Wyse 3040), else
 # the first non-USB, non-optical disk. The live USB stick itself is
 # excluded via the ISO9660 label mount.
 set -euo pipefail
 
-HOST=edge-1
+usage() { echo "usage: edge-install <hostname> [disk]"; exit 1; }
+[ $# -ge 1 ] && [ $# -le 2 ] || usage
+HOST=$1
+# RFC 1123 label: what systemd-networkd sends as the DHCP hostname.
+[[ "$HOST" =~ ^[a-z0-9]([a-z0-9-]{0,61}[a-z0-9])?$ ]] \
+  || { echo "invalid hostname: $HOST"; exit 1; }
+shift
 
 detect_disk() {
   # eMMC needs mmc_block before any /dev/mmcblk* exists (see