Fix: pipeline ignore MinerU backend config and vllm module is missing (#11955)

### What problem does this PR solve?

Fix pipeline ignore MinerU backend config and vllm module is missing.
#11944, #11947.

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

docker/entrypoint.sh

@@ -209,23 +209,42 @@ function ensure_mineru() {
     local default_prefix="/ragflow/uv_tools"
     local venv_dir="${default_prefix}/.venv"
     local exe="${MINERU_EXECUTABLE:-${venv_dir}/bin/mineru}"
+    local mineru_backend="${MINERU_BACKEND:-pipeline}"
+    local mineru_pkg="mineru[core]"
+
+    if [[ "${mineru_backend}" == vlm-* ]]; then
+      mineru_pkg="mineru[core,vlm]"
+    fi
 
     if [[ -x "${exe}" ]]; then
-      echo "[mineru] found: ${exe}"
+      echo "[mineru] found: ${exe} (MINERU_BACKEND=${mineru_backend})"
       export MINERU_EXECUTABLE="${exe}"
+
+      if [[ "${mineru_backend}" == vlm-* ]]; then
+        if ! "${venv_dir}/bin/python3" -c "import importlib.util, sys; sys.exit(0 if importlib.util.find_spec('vllm') else 1)" >/dev/null 2>&1; then
+          echo "[mineru] vllm not found for MINERU_BACKEND=${mineru_backend}, installing ${mineru_pkg} ..."
+          (
+            set -e
+            source "${venv_dir}/bin/activate"
+            uv pip install -U "${mineru_pkg}" -i https://mirrors.aliyun.com/pypi/simple --extra-index-url https://pypi.org/simple
+            deactivate
+          ) || return 1
+        fi
+      fi
       return 0
     fi
 
-    echo "[mineru] not found, bootstrapping with uv ..."
+    echo "[mineru] not found, bootstrapping with uv ... (MINERU_BACKEND=${mineru_backend}, pkg=${mineru_pkg})"
 
     (
         set -e
         mkdir -p "${default_prefix}"
         cd "${default_prefix}"
-        [[ -d "${venv_dir}" ]] || uv venv "${venv_dir}"
+        [[ -d "${venv_dir}" ]] || { echo "[mineru] creating venv at ${venv_dir} ..."; uv venv "${venv_dir}"; }
 
+        echo "[mineru] installing ${mineru_pkg} into ${venv_dir} ..."
         source "${venv_dir}/bin/activate"
-        uv pip install -U "mineru[core]" -i https://mirrors.aliyun.com/pypi/simple --extra-index-url https://pypi.org/simple
+        uv pip install -U "${mineru_pkg}" -i https://mirrors.aliyun.com/pypi/simple --extra-index-url https://pypi.org/simple
         deactivate
     )
     export MINERU_EXECUTABLE="${exe}"

rag/llm/ocr_model.py

@@ -34,18 +34,28 @@ class MinerUOcrModel(Base, MinerUParser):
 
     def __init__(self, key: str | dict, model_name: str, **kwargs):
         Base.__init__(self, key, model_name, **kwargs)
-        config = {}
+        raw_config = {}
         if key:
             try:
-                config = json.loads(key)
+                raw_config = json.loads(key)
             except Exception:
+                raw_config = {}
+
+        # nested {"api_key": {...}} from UI
+        # flat {"MINERU_*": "..."} payload auto-provisioned from env vars
+        config = raw_config.get("api_key", raw_config)
+        if not isinstance(config, dict):
             config = {}
-        config = config["api_key"]
-        self.mineru_api = config.get("mineru_apiserver", os.environ.get("MINERU_APISERVER", ""))
-        self.mineru_output_dir = config.get("mineru_output_dir", os.environ.get("MINERU_OUTPUT_DIR", ""))
-        self.mineru_backend = config.get("mineru_backend", os.environ.get("MINERU_BACKEND", "pipeline"))
-        self.mineru_server_url = config.get("mineru_server_url", os.environ.get("MINERU_SERVER_URL", ""))
-        self.mineru_delete_output = bool(int(config.get("mineru_delete_output", os.environ.get("MINERU_DELETE_OUTPUT", 1))))
+
+        def _resolve_config(key: str, env_key: str, default=""):
+            # lower-case keys (UI), upper-case MINERU_* (env auto-provision), env vars
+            return config.get(key, config.get(env_key, os.environ.get(env_key, default)))
+
+        self.mineru_api = _resolve_config("mineru_apiserver", "MINERU_APISERVER", "")
+        self.mineru_output_dir = _resolve_config("mineru_output_dir", "MINERU_OUTPUT_DIR", "")
+        self.mineru_backend = _resolve_config("mineru_backend", "MINERU_BACKEND", "pipeline")
+        self.mineru_server_url = _resolve_config("mineru_server_url", "MINERU_SERVER_URL", "")
+        self.mineru_delete_output = bool(int(_resolve_config("mineru_delete_output", "MINERU_DELETE_OUTPUT", 1)))
         self.mineru_executable = os.environ.get("MINERU_EXECUTABLE", "mineru")
 
         logging.info(f"Parsed MinerU config: {config}")