File size: 4,938 Bytes
6e23cd8 6d02e4d 6e23cd8 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 | from __future__ import annotations
import json
import os
import sys
import urllib.parse
import urllib.request
from pathlib import Path
from huggingface_hub import hf_hub_download
MODEL_REPO = os.getenv("MODEL_REPO", "yuxinlu1/gemma-4-12B-agentic-fable5-composer2.5-v2-3.5x-tau2-GGUF")
MODEL_FILE = os.getenv("MODEL_FILE", "gemma4-v2-Q4_K_M.gguf")
MODEL_DIR = Path(os.getenv("MODEL_DIR", "/data/models/gemma4-coder"))
CHAT_TEMPLATE_FILE = Path(os.getenv("CHAT_TEMPLATE_FILE", "/data/models/gemma4-coder/chat_template.jinja"))
LLAMA_SERVER_BIN = os.getenv("LLAMA_SERVER_BIN", "/opt/llama.cpp/llama-server")
LLAMA_HOST = os.getenv("LLAMA_HOST", "0.0.0.0")
LLAMA_PORT = os.getenv("LLAMA_PORT", "7860")
THREADS = os.getenv("THREADS", "4")
CTX_SIZE = os.getenv("CTX_SIZE", "2048")
BATCH_SIZE = os.getenv("BATCH_SIZE", "default")
UBATCH_SIZE = os.getenv("UBATCH_SIZE", "default")
GPU_LAYERS = os.getenv("GPU_LAYERS", "0")
FLASH_ATTN = os.getenv("FLASH_ATTN", "default")
CACHE_TYPE_K = os.getenv("CACHE_TYPE_K", "default")
CACHE_TYPE_V = os.getenv("CACHE_TYPE_V", "default")
TEMPERATURE = os.getenv("TEMPERATURE", "0.2")
TOP_P = os.getenv("TOP_P", "0.95")
TOP_K = os.getenv("TOP_K", "64")
REPEAT_PENALTY = os.getenv("REPEAT_PENALTY", "1.08")
def log(message: str) -> None:
print(f"[startup] {message}", flush=True)
def download_model() -> str:
MODEL_DIR.mkdir(parents=True, exist_ok=True)
local_file = MODEL_DIR / MODEL_FILE
if local_file.exists():
log(f"Using cached model: {local_file}")
return str(local_file)
log(f"Downloading {MODEL_REPO}/{MODEL_FILE}")
model_path = hf_hub_download(
repo_id=MODEL_REPO,
filename=MODEL_FILE,
local_dir=str(MODEL_DIR),
)
log(f"Model ready: {model_path}")
return model_path
def download_chat_template() -> str | None:
if CHAT_TEMPLATE_FILE.exists() and CHAT_TEMPLATE_FILE.stat().st_size > 0:
log(f"Using cached chat template: {CHAT_TEMPLATE_FILE}")
return str(CHAT_TEMPLATE_FILE)
encoded_repo = urllib.parse.quote(MODEL_REPO, safe="/")
api_url = f"https://huggingface.co/api/models/{encoded_repo}"
log("Fetching chat template from model metadata")
try:
with urllib.request.urlopen(api_url, timeout=30) as response:
metadata = json.loads(response.read().decode("utf-8"))
except Exception as exc:
log(f"Could not fetch chat template metadata: {exc}")
return None
template = (metadata.get("gguf") or {}).get("chat_template")
if not template:
log("No chat template found in model metadata; llama-server will use GGUF metadata")
return None
CHAT_TEMPLATE_FILE.parent.mkdir(parents=True, exist_ok=True)
CHAT_TEMPLATE_FILE.write_text(template, encoding="utf-8")
log(f"Chat template ready: {CHAT_TEMPLATE_FILE}")
return str(CHAT_TEMPLATE_FILE)
def build_command(model_path: str, template_path: str | None) -> list[str]:
def has_custom_value(value: str) -> bool:
return value.strip().lower() not in {"", "default", "auto", "none", "off"}
def add_optional_pair(flag: str, value: str) -> None:
if has_custom_value(value):
cmd.extend([flag, value])
cmd = [
LLAMA_SERVER_BIN,
"-m",
model_path,
"--host",
LLAMA_HOST,
"--port",
LLAMA_PORT,
"--threads",
THREADS,
"--ctx-size",
CTX_SIZE,
"--n-gpu-layers",
GPU_LAYERS,
"--parallel",
"1",
"--cont-batching",
"--temp",
TEMPERATURE,
"--top-p",
TOP_P,
"--top-k",
TOP_K,
"--repeat-penalty",
REPEAT_PENALTY,
]
add_optional_pair("--batch-size", BATCH_SIZE)
add_optional_pair("--ubatch-size", UBATCH_SIZE)
add_optional_pair("--cache-type-k", CACHE_TYPE_K)
add_optional_pair("--cache-type-v", CACHE_TYPE_V)
if has_custom_value(FLASH_ATTN):
cmd.extend(["-fa", FLASH_ATTN])
if template_path:
cmd.extend(["--chat-template-file", template_path])
return cmd
def main() -> None:
binary_dir = str(Path(LLAMA_SERVER_BIN).parent)
existing_library_path = os.environ.get("LD_LIBRARY_PATH")
os.environ["LD_LIBRARY_PATH"] = (
binary_dir if not existing_library_path else f"{binary_dir}:{existing_library_path}"
)
os.environ.setdefault("OMP_NUM_THREADS", THREADS)
os.environ.setdefault("OPENBLAS_NUM_THREADS", THREADS)
os.environ.setdefault("MKL_NUM_THREADS", THREADS)
model_path = download_model()
template_path = download_chat_template()
cmd = build_command(model_path, template_path)
log("Starting native llama.cpp web UI")
log(" ".join(cmd))
os.execvpe(cmd[0], cmd, os.environ)
if __name__ == "__main__":
try:
main()
except Exception as exc:
print(f"[fatal] {exc}", file=sys.stderr, flush=True)
raise
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