Document installer release architecture

autoinstall/offline/build-bundle.sh

@@ -35,10 +35,18 @@ if [ "$available_kb" -lt $((80 * 1024 * 1024)) ]; then
 fi
 
 rm -rf "$OUTPUT_DIR"
-mkdir -p "$PAYLOAD_DIR"/{apt,containers,models,python,runtime,source} "$MANIFEST_DIR"
+mkdir -p "$PAYLOAD_DIR"/{apt,containers,models,runtime,source} \
+  "$PAYLOAD_DIR/python"/{backend,chromadb,platform} "$MANIFEST_DIR"
 
 echo "-> Capturing pinned appliance source"
-git -C "$PACKAGE_DIR" rev-parse HEAD > "$MANIFEST_DIR/source-commit.txt"
+if git -C "$PACKAGE_DIR" rev-parse HEAD >/dev/null 2>&1; then
+  git -C "$PACKAGE_DIR" rev-parse HEAD > "$MANIFEST_DIR/source-commit.txt"
+elif [ -n "${OFFLINE_SOURCE_COMMIT:-}" ]; then
+  printf '%s\n' "$OFFLINE_SOURCE_COMMIT" > "$MANIFEST_DIR/source-commit.txt"
+else
+  echo "ERROR: source commit is unavailable; set OFFLINE_SOURCE_COMMIT for exported source trees." >&2
+  exit 1
+fi
 rsync -a --delete \
   --exclude '.git/' --exclude '*.iso' --exclude 'offline-output/' \
   --exclude 'how-it-flows.gif' \
@@ -52,9 +60,15 @@ apt-get install -y --download-only --reinstall \
   -o "Dir::Cache::archives=$PAYLOAD_DIR/apt" "${apt_packages[@]}"
 
 echo "-> Downloading Python wheelhouse"
-python3 -m pip download --dest "$PAYLOAD_DIR/python" \
-  -r "$PACKAGE_DIR/ansible/roles/cezen-backend/files/requirements.txt" \
-  -r "$SCRIPT_DIR/python-packages.txt"
+python3 -m pip download --dest "$PAYLOAD_DIR/python/backend" \
+  -r "$PACKAGE_DIR/ansible/roles/cezen-backend/files/requirements.txt"
+python3 -m pip download --dest "$PAYLOAD_DIR/python/chromadb" \
+  'chromadb==0.5.23'
+grep -vE '^[[:space:]]*(#|$|chromadb==)' "$SCRIPT_DIR/python-packages.txt" \
+  > "$OUTPUT_DIR/platform-python-packages.txt"
+python3 -m pip download --dest "$PAYLOAD_DIR/python/platform" \
+  -r "$OUTPUT_DIR/platform-python-packages.txt"
+rm -f "$OUTPUT_DIR/platform-python-packages.txt"
 
 echo "-> Capturing Miniconda installer"
 curl --fail --location --retry 3 "$MINICONDA_URL" \
@@ -76,17 +90,27 @@ echo "-> Capturing Ollama runtime and Starter models"
 if ! command -v ollama >/dev/null; then
   curl --fail --location --retry 3 https://ollama.com/install.sh | sh
 fi
-systemctl start ollama 2>/dev/null || true
-for model in $OLLAMA_MODELS; do ollama pull "$model"; done
 tar -C / -czf "$PAYLOAD_DIR/runtime/ollama-runtime.tar.gz" \
   usr/local/bin/ollama usr/local/lib/ollama
-ollama_root="${OLLAMA_MODELS_DIR:-/usr/share/ollama/.ollama/models}"
-[ -d "$ollama_root" ] || ollama_root="/root/.ollama/models"
-[ -d "$ollama_root" ] || {
-  echo "ERROR: Ollama model store not found after pull." >&2
-  exit 1
-}
-tar -C "$(dirname "$ollama_root")" -czf "$PAYLOAD_DIR/models/ollama-models.tar.gz" models
+isolated_ollama="$OUTPUT_DIR/ollama-staging"
+mkdir -p "$isolated_ollama"
+OLLAMA_MODELS="$isolated_ollama/models" OLLAMA_HOST=127.0.0.1:11435 \
+  ollama serve >"$OUTPUT_DIR/ollama-staging.log" 2>&1 &
+ollama_pid=$!
+cleanup_ollama() { kill "$ollama_pid" 2>/dev/null || true; }
+trap cleanup_ollama EXIT
+for _ in $(seq 1 30); do
+  OLLAMA_HOST=127.0.0.1:11435 ollama list >/dev/null 2>&1 && break
+  sleep 1
+done
+for model in $OLLAMA_MODELS; do
+  OLLAMA_MODELS="$isolated_ollama/models" OLLAMA_HOST=127.0.0.1:11435 \
+    ollama pull "$model"
+done
+cleanup_ollama
+trap - EXIT
+tar -C "$isolated_ollama" -czf "$PAYLOAD_DIR/models/ollama-models.tar.gz" models
+rm -rf "$isolated_ollama" "$OUTPUT_DIR/ollama-staging.log"
 
 echo "-> Capturing vLLM Starter model snapshot"
 python3 -m pip install --quiet huggingface-hub