Add no-cache response header to dashboard for immediate visibility after deploys; enhance Proxmox monitoring documentation and update flash script to allow Backup without a golden image.

chromium-setup/emmc-provisioning/dashboard/app.py

@@ -14,6 +14,16 @@ from flask import Flask, render_template, jsonify, request, send_file, Response
 
 app = Flask(__name__)
 
+
+@app.after_request
+def no_cache(response):
+    """Prevent browser from caching the dashboard so deploys are visible immediately."""
+    if request.path == "/" or request.path.startswith("/api/"):
+        response.headers["Cache-Control"] = "no-store, no-cache, must-revalidate, max-age=0"
+        response.headers["Pragma"] = "no-cache"
+    return response
+
+
 BASE_DIR = Path(os.environ.get("CM4_PROVISIONING_DIR", "/var/lib/cm4-provisioning"))
 STATUS_FILE = os.environ.get("CM4_STATUS_FILE", str(BASE_DIR / "status.json"))
 LOG_FILE = os.environ.get("CM4_LOG_FILE", str(BASE_DIR / "flash.log"))

chromium-setup/emmc-provisioning/docs/PROXMOX-LXC-DEPLOYMENT.md

@@ -141,6 +141,32 @@ Then open **http://<LXC-201-IP>:5000** (get the IP with `pct exec 201 -- h
 
 ---
 
+## Monitoring from the host
+
+From the **Proxmox host** you can monitor:
+
+| What | How |
+|------|-----|
+| **USB device** | `lsusb` — CM4 in boot mode shows as **2b8e** (RPi) or **0a5c:2711** (Broadcom BCM2711) |
+| **Live status** | `cat /var/lib/cm4-provisioning/status.json` — same JSON the dashboard shows (phase, message, error) |
+| **Flash log** | `tail -f /var/lib/cm4-provisioning/flash.log` — script log (rpiboot, dd, errors) |
+| **Flash job** | `systemctl status cm4-flash-once` — whether the udev-triggered job is running/failed |
+| **Journal** | `journalctl -u cm4-flash-once -f` or `journalctl -t cm4-flash -f` — systemd/log output |
+| **Block devices** | `lsblk` — after rpiboot, the eMMC appears as a new disk (e.g. `/dev/sdb`) |
+| **Backups** | `ls /var/lib/cm4-provisioning/backups/` — backup images created from the dashboard |
+| **Config** | `cat /opt/cm4-provisioning/env` — GOLDEN_IMAGE, RPIBOOT_DIR, EMMC_SIZE_BYTES |
+
+**One-command snapshot:**
+
+```bash
+# From your machine (stream script to host):
+ssh root@10.130.60.224 'bash -s' < chromium-setup/emmc-provisioning/scripts/monitor-from-host.sh
+```
+
+Or copy `scripts/monitor-from-host.sh` to the host and run `./monitor-from-host.sh` for a full status dump (USB, status.json, flash unit, last log lines, block devices, config).
+
+---
+
 ## Redeploy / update scripts
 
 From your repo (e.g. after changing scripts):

chromium-setup/emmc-provisioning/host/90-cm4-boot-mode.rules

@@ -1,10 +1,10 @@
 # When reTerminal (CM4) is connected in USB boot mode (eMMC disable jumper),
-# Raspberry Pi Foundation USB device appears (vendor 2b8e). Trigger provisioning:
+# the device appears as either Raspberry Pi Foundation (2b8e) or Broadcom BCM2711 Boot (0a5c:2711).
-# run rpiboot to expose eMMC, then wait for user to choose Backup or Deploy in the portal.
+# Trigger provisioning: run rpiboot, then wait for user to choose Backup or Deploy in the portal.
-# No auto-flash — action runs only after portal choice.
 # Install: sudo cp 90-cm4-boot-mode.rules /etc/udev/rules.d/
 #          sudo udevadm control --reload-rules
-# The trigger script starts the provisioning script via systemd so udev does not block.
 
 SUBSYSTEM=="usb", ATTR{idVendor}=="2b8e", ACTION=="add", \
   RUN+="/usr/local/bin/cm4-flash-trigger.sh"
+SUBSYSTEM=="usb", ATTR{idVendor}=="0a5c", ATTR{idProduct}=="2711", ACTION=="add", \
+  RUN+="/usr/local/bin/cm4-flash-trigger.sh"

chromium-setup/emmc-provisioning/host/flash-emmc-on-connect.sh

@@ -48,11 +48,9 @@ ACTION_REQUEST_FILE="${ACTION_REQUEST_FILE:-/var/lib/cm4-provisioning/action_req
 CURRENT_DEVICE_FILE="${CURRENT_DEVICE_FILE:-/var/lib/cm4-provisioning/current_device}"
 DEVICE_SOURCE_FILE="${DEVICE_SOURCE_FILE:-/var/lib/cm4-provisioning/device_source}"
 WAIT_TIMEOUT="${WAIT_TIMEOUT:-600}"
-# Golden image required for deploy
+# Golden image required only for Deploy; allow Backup without it
 if [[ ! -f "$GOLDEN_IMAGE" ]]; then
-  log "Golden image not found (required for deploy): $GOLDEN_IMAGE"
+  log "Golden image not found (Deploy will be unavailable): $GOLDEN_IMAGE"
-  write_status "error" "Golden image not found" "null" "Golden image not found. Add golden.img for deploy."
-  exit 1
 fi
 
 RPIBOOT_BIN="$RPIBOOT_DIR/rpiboot"
@@ -140,6 +138,12 @@ for (( i = 0; i < WAIT_TIMEOUT; i += 2 )); do
         write_status "error" "Backup failed" "null" "dd failed"
       fi
     elif [[ "$action" == "deploy" ]]; then
+      if [[ ! -f "$GOLDEN_IMAGE" ]]; then
+        log "Golden image not found; cannot deploy."
+        write_status "error" "Deploy unavailable" "null" "Golden image not found. Add golden.img to /var/lib/cm4-provisioning/ for deploy."
+        rm -f "$CURRENT_DEVICE_FILE" "$DEVICE_SOURCE_FILE" 2>/dev/null || true
+        exit 1
+      fi
       write_status "flashing" "Writing golden image…" "null"
       log "Flashing $GOLDEN_IMAGE to $target_dev..."
       if dd if="$GOLDEN_IMAGE" of="$target_dev" bs=4M status=progress conv=fsync 2>>"$LOG_FILE"; then

chromium-setup/emmc-provisioning/scripts/check-usb-on-host.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+# Run on the Proxmox HOST (where USB is connected) to verify the reTerminal in boot mode is seen.
+# Usage: ssh root@10.130.60.224 'bash -s' < scripts/check-usb-on-host.sh
+# Or copy to host and run: ./check-usb-on-host.sh
+
+echo "=== CM4 boot-mode USB (2b8e = RPi, 0a5c:2711 = Broadcom BCM2711) ==="
+lsusb | grep -E "2b8e|0a5c" || echo "None found. Connect reTerminal in boot mode (eMMC disable jumper) and use the USB slave port."
+echo ""
+echo "=== All USB devices ==="
+lsusb
+echo ""
+echo "=== Provisioning status ==="
+cat /var/lib/cm4-provisioning/status.json 2>/dev/null || echo "No status.json (script has not run yet)."
+echo ""
+echo "=== Last flash log ==="
+tail -15 /var/lib/cm4-provisioning/flash.log 2>/dev/null || echo "No flash.log"
+echo ""
+echo "=== udev rule and rpiboot ==="
+test -f /etc/udev/rules.d/90-cm4-boot-mode.rules && echo "90-cm4-boot-mode.rules: present" || echo "90-cm4-boot-mode.rules: MISSING"
+test -x /opt/usbboot/rpiboot && echo "rpiboot: present" || echo "rpiboot: MISSING"
+test -f /etc/cm4-provisioning/enabled && echo "enabled: yes" || echo "enabled: no (provisioning disabled)"

chromium-setup/emmc-provisioning/scripts/deploy-dashboard-to-lxc.sh

@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+# Deploy only the dashboard to the LXC by IP (no Proxmox host needed).
+# Usage: ./deploy-dashboard-to-lxc.sh [user@lxc_ip]
+# Example: ./deploy-dashboard-to-lxc.sh root@10.130.60.119
+
+set -e
+LXC="${1:-root@10.130.60.119}"
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+REPO_DIR="$(dirname "$SCRIPT_DIR")"
+DASHBOARD_DIR="$REPO_DIR/dashboard"
+REMOTE_DIR="/opt/cm4-provisioning/dashboard"
+
+if [[ ! -d "$DASHBOARD_DIR" ]]; then
+  echo "Error: dashboard dir not found: $DASHBOARD_DIR"
+  exit 1
+fi
+
+echo "Deploying dashboard to $LXC ($REMOTE_DIR) ..."
+ssh "$LXC" "mkdir -p $REMOTE_DIR/templates"
+
+rsync -avz \
+  "$DASHBOARD_DIR/app.py" \
+  "$DASHBOARD_DIR/cm4-dashboard.service" \
+  "$LXC:$REMOTE_DIR/"
+
+rsync -avz \
+  "$DASHBOARD_DIR/templates/" \
+  "$LXC:$REMOTE_DIR/templates/"
+
+echo "Restarting cm4-dashboard service ..."
+ssh "$LXC" "systemctl restart cm4-dashboard && systemctl is-active --quiet cm4-dashboard && echo 'Dashboard restarted and running.'"
+
+echo "Done. Dashboard at http://$(echo "$LXC" | cut -d@ -f2):5000"

chromium-setup/emmc-provisioning/scripts/monitor-from-host.sh

@@ -0,0 +1,44 @@
+#!/usr/bin/env bash
+# Run on the Proxmox HOST to see provisioning status, USB, flash job, and logs.
+# Usage: ./monitor-from-host.sh   or: ssh root@10.130.60.224 'bash -s' < scripts/monitor-from-host.sh
+
+PROV=/var/lib/cm4-provisioning
+
+echo "═══════════════════════════════════════════════════════════════"
+echo "  CM4 provisioning – host monitor"
+echo "═══════════════════════════════════════════════════════════════"
+echo ""
+
+echo "--- USB (CM4 boot mode: 2b8e or 0a5c:2711) ---"
+lsusb | grep -E "2b8e|0a5c" || echo "  No CM4 boot device seen."
+echo ""
+
+echo "--- Current status (dashboard reads this) ---"
+if [[ -f "$PROV/status.json" ]]; then
+  cat "$PROV/status.json" | python3 -m json.tool 2>/dev/null || cat "$PROV/status.json"
+else
+  echo "  No status.json (no run yet)."
+fi
+echo ""
+
+echo "--- Flash job (systemd unit) ---"
+systemctl show cm4-flash-once --property=ActiveState,SubState,ExecMainPID 2>/dev/null || echo "  Unit not run yet."
+echo ""
+
+echo "--- Last 20 lines of flash.log ---"
+tail -20 "$PROV/flash.log" 2>/dev/null || echo "  No flash.log"
+echo ""
+
+echo "--- Provisioning dir ---"
+ls -la "$PROV/" 2>/dev/null || echo "  Dir missing."
+echo ""
+
+echo "--- Block devices (eMMC appears here after rpiboot) ---"
+lsblk -d -o NAME,SIZE,MODEL,TRAN 2>/dev/null | head -15
+echo ""
+
+echo "--- Config ---"
+echo "  enabled:  $([ -f /etc/cm4-provisioning/enabled ] && echo yes || echo no)"
+echo "  rpiboot:  $([ -x /opt/usbboot/rpiboot ] && echo /opt/usbboot/rpiboot || echo MISSING)"
+echo "  golden:   $([ -f $PROV/golden.img ] && echo present || echo not set)"
+echo "  backups:  $(ls "$PROV/backups" 2>/dev/null | wc -l) file(s)"