Improve ISO installer non-GPU and bundled setup flow

install.sh

@@ -52,6 +52,20 @@ install_ansible() {
   echo "✓ Ansible ready"
 }
 
+has_nvidia_pci_gpu() {
+  for vendor_file in /sys/bus/pci/devices/*/vendor; do
+    [ -f "$vendor_file" ] || continue
+    if [ "$(tr '[:upper:]' '[:lower:]' < "$vendor_file")" = "0x10de" ]; then
+      return 0
+    fi
+  done
+  return 1
+}
+
+has_working_nvidia_driver() {
+  command -v nvidia-smi &>/dev/null && nvidia-smi &>/dev/null
+}
+
 # ── Phase 1: NVIDIA drivers only ──────────────
 run_phase1() {
   echo ""
@@ -59,6 +73,13 @@ run_phase1() {
   echo "║   Cezen AI Suite — Phase 1: NVIDIA       ║"
   echo "╚══════════════════════════════════════════╝"
 
+  if ! has_nvidia_pci_gpu; then
+    echo "No NVIDIA GPU found. Continuing with CPU/non-GPU installation path."
+    PHASE="2"
+    run_phase2
+    return
+  fi
+
   ANSIBLE_STDOUT_CALLBACK=yaml \
   ansible-playbook -i localhost, -c local "$ANSIBLE_DIR/phase1_nvidia.yml" \
     -e "tier=$TIER"
@@ -72,7 +93,7 @@ Wants=network-online.target
 
 [Service]
 Type=oneshot
-ExecStart=/bin/bash ${SCRIPT_DIR}/install.sh --phase=2 --tier=${TIER}
+ExecStart=/bin/bash -lc 'set -o pipefail; /bin/bash ${SCRIPT_DIR}/install.sh --phase=2 --tier=${TIER} 2>&1 | tee -a /var/log/cezen-install.log'
 RemainAfterExit=yes
 StandardOutput=journal+console
 StandardError=journal+console
@@ -98,17 +119,19 @@ run_phase2() {
   echo "║   Cezen AI Suite — Phase 2: Stack        ║"
   echo "╚══════════════════════════════════════════╝"
 
-  # Verify NVIDIA driver loaded
-  if ! nvidia-smi &>/dev/null; then
-    echo "WARNING: nvidia-smi not responding. NVIDIA driver may not be loaded."
-    echo "         Continuing — non-GPU roles will still install correctly."
+  GPU_AVAILABLE=false
+  if ! has_working_nvidia_driver; then
+    echo "No working NVIDIA GPU/driver found. Continuing with CPU/non-GPU installation path."
+    echo "GPU-only features such as NVIDIA Docker runtime, DCGM metrics, and vLLM serving will be skipped or left inactive."
   else
+    GPU_AVAILABLE=true
     echo "✓ NVIDIA driver: $(nvidia-smi --query-gpu=driver_version --format=csv,noheader | head -1)"
   fi
 
   # Build skip_roles extra var (comma-separated list, empty string = skip nothing)
-  EXTRA_VARS="tier=$TIER skip_roles=\"$SKIP_ROLES\""
+  EXTRA_VARS="tier=$TIER skip_roles=\"$SKIP_ROLES\" gpu_available=$GPU_AVAILABLE"
   echo "→ Tier: $TIER | Skip: ${SKIP_ROLES:-none}"
+  echo "→ GPU available: $GPU_AVAILABLE"
 
   ANSIBLE_STDOUT_CALLBACK=yaml \
   ansible-playbook -i localhost, -c local "$ANSIBLE_DIR/entry.yml" \