pin dependencies

this seems to have been introduced in a recent OpenAI SDK update

.runpod/hub.json

@@ -1,5 +1,5 @@
 {
-    "title": "llama.cpp inference",
+    "title": "llama.cpp",
     "description": "Run llama.cpp inference using serverless RunPod workers!",
     "type": "serverless",
     "category": "language",
@@ -14,13 +14,33 @@
             {
                 "key": "LLAMA_SERVER_CMD_ARGS",
                 "input": {
-                    "name": "Model Name",
+                    "name": "Command line arguments for llama-server",
                     "type": "string",
-                    "description": "Launch command line arguments (argv) for the llama-server binary. Do not define the port.",
+                    "description": "Launch command line arguments (argv) for the llama-server binary. Do not define the port. If using caching, do not define -hf or -m here.",
-                    "default": "-hf unsloth/Mistral-Small-3.2-24B-Instruct-2506-GGUF:Q4_K_M -ctx_size 4096",
+                    "default": "-hf unsloth/gemma-3-270m-it-GGUF:Q6_K --ctx-size 4096 -ngl 999",
                     "advanced": false
                 }
             },
+            {
+                "key": "LLAMA_CACHED_MODEL",
+                "input": {
+                    "name": "Hugging Face Hub model name for cached model",
+                    "type": "string",
+                    "description": "Hugging Face Hub model name to use for the cached GGUF model. Leave empty to disable caching. Example: user/model-name",
+                    "default": "",
+                    "advanced": true
+                }
+            },
+            {
+                "key": "LLAMA_CACHED_GGUF_PATH",
+                "input": {
+                    "name": "Path to GGUF file in the Hugging Face Hub model repository",
+                    "type": "string",
+                    "description": "Path to the GGUF file in the Hugging Face Hub model repository to use for caching. Example: model.gguf",
+                    "default": "",
+                    "advanced": true
+                }
+            },
             {
                 "key": "MAX_CONCURRENCY",
                 "input": {

.runpod/tests.json

@@ -5,7 +5,7 @@
             "input": {
                 "prompt": "Hi! Who are you?"
             },
-            "timeout": 120000
+            "timeout": 60000
         }
     ],
     "config": {
@@ -14,7 +14,7 @@
         "env": [
             {
                 "key": "LLAMA_SERVER_CMD_ARGS",
-                "value": "-hf unsloth/Mistral-Small-3.2-24B-Instruct-2506-GGUF:Q4_K_M -ctx_size 4096"
+                "value": "-hf unsloth/gemma-3-270m-it-GGUF:IQ2_XXS --ctx-size 512 -ngl 999"
             }
         ],
         "allowedCudaVersions": [

README.md

@@ -4,8 +4,6 @@
 
 # Serverless llama.cpp inference worker for RunPod
 
-[![Runpod badge](https://api.runpod.io/badge/Jacob-ML/inference-worker)](https://console.runpod.io/hub/Jacob-ML/inference-worker)
-
 This repository contains a serverless inference worker for running llama.cpp models on RunPod. It uses the `llama-server` image to provide an API for interacting with the models.
 The following OpenAI API endpoints are supported:
 
@@ -15,18 +13,23 @@ The following OpenAI API endpoints are supported:
 
 Streaming responses is also supported.
 
+**Important!** This project is still relatively new. Please [open a new issue](https://github.com/Jacob-ML/inference-worker/issues/new) if you encounter any problems in order to get help.
+
+**This is a fork of [SvenBrnn's `runpod-worker-ollama`](https://github.com/SvenBrnn/runpod-worker-ollama).**
+
 ## Setup
 
-For the setup to work best, it is recommended to use a network volume attached to all workers which stores the model GGUFs and then reference those files in the launch arguments.
+To get the best performance out of this worker, it is recommended to use cached models. Please see the [cached models documentation](./docs/cached.md) for more information, this is **highly recommended and will save many resources**.
-Make sure your RunPod worker has access to the network volume, i.e. is located in the correct data center.
 
 ## Configuration
 
 The worker can be configured via environment variables set in the RunPod hub configuration:
 
-- `LLAMA_SERVER_CMD_ARGS`: Command line arguments (argv) for the `llama-server` binary. Example: `-hf /path/to/model.gguf:Q4_K_M -ctx_size 4096`. **IMPORTANT**: Please do not define the port argument here, as the worker will always use port `3098` automatically.
+- `LLAMA_SERVER_CMD_ARGS`: Command line arguments (argv) for the `llama-server` binary. Example: `-hf /path/to/model.gguf:Q4_K_M --ctx-size 4096`. **IMPORTANT**: Please do not define the port argument here, as the worker will always use port `3098` automatically.
 - `MAX_CONCURRENCY`: Maximum number of concurrent requests the worker can handle. Default is `8`.
 
 ## License
 
 Please see the [LICENSE](./LICENSE) file for more information.
+
+[![Runpod badge](https://api.runpod.io/badge/Jacob-ML/inference-worker)](https://console.runpod.io/hub/Jacob-ML/inference-worker)

docs/cached.md

@@ -0,0 +1,63 @@
+# Using cached models
+
+## Introduction
+
+The classic way of loading a model from the Hugging Face Hub with the `LLAMA_SERVER_CMD_ARGS` is as follows:
+
+```bash
+-hf /path/to/model.gguf:Q4_K_M --ctx-size 4096 # etc...
+```
+
+However, this will cause every worker to download the model from the Hugging Face Hub every time it is started, which can be slow and inefficient.
+
+A naive way to cache the model would be to store it on a network volume in RunPod and reference the model files this way:
+
+```bash
+-m /runpod-volume/model.gguf --ctx-size 4096 # etc...
+```
+
+Unfortunately, network volume performance is often not sufficient for loading large models, leading to long load times. RunPod introduced a [caching mechanism](https://docs.runpod.io/serverless/endpoints/model-caching) to solve this problem.
+
+The `inference-worker` for llama.cpp now supports this caching mechanism.
+
+## How to use the new caching mechanism
+
+It ships the `src/find_cached.py` script which can be used to reference any Hugging Face model of your choice and get its cached path on the local worker storage.
+
+Here is how the script can be used independently (which you will likely never need to do):
+
+```bash
+python3 src/find_cached.py HF_MODEL_ID GGUF_PATH_IN_REPO
+```
+
+Example:
+
+```bash
+python3 src/find_cached.py unsloth/gemma-3-270m-it-GGUF gemma-3-270m-it-Q8_0.gguf
+```
+
+Or, if your model is in a folder (an edge case nobody seems to be thinking about, driving me absolutely crazy):
+
+```bash
+python3 src/find_cached.py jacob-ml/jacob-24b models/jacob-24b-q4_k_m.gguf
+```
+
+We will now integrate this into our workflow. Hang tight.
+
+## Step-by-step guide
+
+1.  First of all, please enter the Hugging Face URL of the model you want to use in RunPod's `Model` field of your worker settings.
+
+    Example: For the model `unsloth/gemma-3-270m-it-GGUF`, you would enter `https://huggingface.co/unsloth/gemma-3-270m-it-GGUF`.
+
+2.  Now, in the environment variables, do NOT enter the `-hf` argument as before and also do NOT define `-m` in the `LLAMA_SERVER_CMD_ARGS`. The inference worker will take care of that for you.
+
+    Instead, set the `LLAMA_CACHED_MODEL` to the model ID, a.e. `unsloth/gemma-3-270m-it-GGUF`. Then, set the `LLAMA_CACHED_GGUF_PATH` to the path of the GGUF file in the repository, e.g. `gemma-3-270m-it-Q8_0.gguf`.
+
+3. Finally, in the `LLAMA_SERVER_CMD_ARGS`, you can now simply add the other arguments you want to use, e.g.:
+
+    ```bash
+    --ctx-size 4096 --temp 0.7 --top-p 0.9
+    ```
+
+4.  Done! The rest will be handled by the inference worker automatically. When the worker starts, it will resolve the cached model path and launch `llama-server` with the correct arguments.

src/engine.py

@@ -21,7 +21,6 @@ Typical usage:
 """
 
 import json
-import os
 
 from dotenv import load_dotenv
 from openai import OpenAI
@@ -29,7 +28,7 @@ from utils import JobInput
 
 client = OpenAI(
     base_url="http://localhost:3098/v1/",
-    api_key="",
+    api_key="none",
 )
 
 

src/find_cached.py

@@ -0,0 +1,66 @@
+"""
+Finds the full LLM GGUF path from the Hugging Face cache.
+"""
+
+import os
+import sys
+import argparse
+
+CACHE_DIR = "/runpod-volume/huggingface-cache/hub"
+
+
+def find_model_path(model_name, gguf_in_repo="model.gguf"):
+    """
+    Find the path to a cached model.
+
+    Args:
+        model_name: The model name from Hugging Face
+
+    Returns:
+        The full path to the cached model, or None if not found
+    """
+
+    cache_name = model_name.replace("/", "--").lower()
+    snapshots_dir = os.path.join(
+        CACHE_DIR, f"models--{cache_name}", "snapshots"
+    )
+
+    if os.path.exists(snapshots_dir):
+        snapshots = os.listdir(snapshots_dir)
+
+        if snapshots:
+            return os.path.join(snapshots_dir, snapshots[0], gguf_in_repo)
+
+    return None
+
+
+def main():
+    """
+    Main function to find and print the model path.
+    """
+
+    parser = argparse.ArgumentParser(
+        description="Find the full GGUF path from the Hugging Face cache."
+    )
+    parser.add_argument(
+        "model", type=str, help="The model name from Hugging Face"
+    )
+    parser.add_argument(
+        "path",
+        type=str,
+        help="The path to the GGUF file within the model repository",
+    )
+    args = parser.parse_args()
+
+    model_path = find_model_path(args.model, args.path)
+    if model_path is None:
+        print(
+            f"Error: Cached model not found. Model='{args.model}', GGUF='{args.path}', Cache dir='{CACHE_DIR}'",
+            file=sys.stderr,
+        )
+        sys.exit(1)
+    print(model_path, end="")
+
+
+if __name__ == "__main__":
+    main()

src/requirements.txt

@@ -1,4 +1,3 @@
-runpod
+runpod==1.9.1
-python-dotenv
+python-dotenv==1.2.2
-openai
+openai==2.41.1
-orjson==3.10.14

src/start.sh

@@ -1,24 +1,50 @@
 #!/bin/bash
 
+# fail on error:
+set -e -o pipefail
+
 # This script starts the llama-server with the command line arguments
 # specified in the environment variable LLAMA_SERVER_CMD_ARGS, ensuring
 # that the server listens on port 3098. It also starts the handler.py
 # script after the server is up and running.
 
 cleanup() {
-    echo "Cleaning up..."
+    echo "start.sh: Cleaning up..."
     pkill -P $$ # kill all child processes of the current script
     exit 0
 }
 
-# check if the substring /workspace is in LLAMA_SERVER_CMD_ARGS
+CACHED_LLAMA_ARGS=""
-if [[ "$LLAMA_SERVER_CMD_ARGS" != *"/workspace"* ]]; then
+
-    echo "Tip: For reduced downloads and faster startup times, consider using a model stored in a network volume mounted to /workspace."
+find_cached_path() {
+    local model_path
+    model_path=$(python ./find_cached.py "$LLAMA_CACHED_MODEL" "$LLAMA_CACHED_GGUF_PATH")
+    if [ $? -ne 0 ] || [ -z "$model_path" ]; then
+        echo "start.sh: Error: Could not resolve cached model path. Check that LLAMA_CACHED_MODEL and LLAMA_CACHED_GGUF_PATH are correct and the model is fully cached on the network volume."
+        exit 1
+    fi
+    CACHED_LLAMA_ARGS="-m $model_path"
+}
+
+# check if $LLAMA_CACHED_MODEL is set and not empty
+if [ -n "$LLAMA_CACHED_MODEL" ]; then
+    echo "start.sh: Caching is enabled. Finding cached model path..."
+    find_cached_path
+
+    echo "start.sh: Using cached model with arguments: $CACHED_LLAMA_ARGS"
+else
+    echo "start.sh: WARNING: Caching is disabled. Please visit the inference-worker README and docs to learn more."
 fi
 
-# check if the substring -port is in LLAMA_SERVER_CMD_ARGS and if yes, raise an error:
+# check if $LLAMA_SERVER_CMD_ARGS is set
-if [[ "$LLAMA_SERVER_CMD_ARGS" == *"-port"* ]]; then
+if [ -z "$LLAMA_SERVER_CMD_ARGS" ]; then
-    echo "Error: You must not define -port in LLAMA_SERVER_CMD_ARGS, as port 3098 is required."
+    echo "start.sh: Warning: LLAMA_SERVER_CMD_ARGS is not set. Defaulting to -hf unsloth/gemma-3-270m-it-GGUF:IQ2_XXS --ctx-size 512 -ngl 999"
+    LLAMA_SERVER_CMD_ARGS="-hf unsloth/gemma-3-270m-it-GGUF:IQ2_XXS --ctx-size 512 -ngl 999"
+fi
+
+# check if the substring --port is in LLAMA_SERVER_CMD_ARGS and if yes, raise an error:
+if [[ "$LLAMA_SERVER_CMD_ARGS" == *"--port"* ]]; then
+    echo "start.sh: Error: You must not define --port in LLAMA_SERVER_CMD_ARGS, as port 3098 is required."
     exit 1
 fi
 
@@ -26,29 +52,58 @@ fi
 trap cleanup SIGINT SIGTERM
 
 # kill any existing llama-server processes
-pkill llama-server
+echo "start.sh: Stopping existing llama-server instances (if any)..."
+{
+    pkill llama-server 2>/dev/null
+} || {
+    echo "start.sh: No llama-server running"
+}
 
 # we have a string with all the command line arguments in the env var LLAMA_SERVER_CMD_ARGS;
-# it contains a.e. "-hf modelname -ctx_size 4096".
+# it contains a.e. "-hf modelname --ctx-size 4096 -ngl 999".
+
+echo "start.sh: Running /app/llama-server $CACHED_LLAMA_ARGS $LLAMA_SERVER_CMD_ARGS --port 3098"
+
+touch llama.server.log
 
 # We need to pass these arguments to llama-server verbatim.
-/app/llama-server $LLAMA_SERVER_CMD_ARGS -port 3098 2>&1 | tee llama.server.log &
+LD_LIBRARY_PATH=/app /app/llama-server $CACHED_LLAMA_ARGS $LLAMA_SERVER_CMD_ARGS --port 3098 2>&1 | tee llama.server.log &
 
 LLAMA_SERVER_PID=$! # store the process ID (PID) of the background command
 
+tries_so_far=0
+
 check_server_is_running() {
-    echo "Checking if llama-server is done initializing..."
+    echo "start.sh: Checking if llama-server is done initializing..."
 
     if cat llama.server.log | grep -q "listening"; then
         return 0 # success
     else
         return 1 # failure
     fi
+
+    tries_so_far=$((tries_so_far + 1))
+
+    if [ $tries_so_far -ge 120 ]; then
+        echo "start.sh: Error: llama-server did not start within 60 seconds."
+        exit 1
+    fi
+
+    # check if the process is still running
+    if ! kill -0 $LLAMA_SERVER_PID 2>/dev/null; then
+        echo "start.sh: Error: llama-server process has exited unexpectedly."
+        exit 1
+    fi
 }
 
+echo "start.sh: Waiting for llama-server to start..."
+
 # wait for the server to start
 while ! check_server_is_running; do
-    sleep 5
+    # we don't want to lose too much time, so we check very frequently
+    sleep 0.5
 done
 
+echo "start.sh: llama-server is up and running, delegating to the handler script."
+
 python -u handler.py $1