File size: 11,712 Bytes
068cb14 | 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 | """Standard-library HTTP adapter. No model is loaded until main()."""
from __future__ import annotations
import argparse
import json
from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer
from pathlib import Path
if __package__:
from .core import ItemFailure, ServiceFailure, UnsupportedRequest, Service, ROOT, load_json, validate_config, apply_profile, validate_calibration, validate_threshold
else:
from core import ItemFailure, ServiceFailure, UnsupportedRequest, Service, ROOT, load_json, validate_config, apply_profile, validate_calibration, validate_threshold
BINDS = ("127.0.0.1", "0.0.0.0")
def make_handler(service):
def service_dead():
check = getattr(service, 'is_dead', None)
return check() if callable(check) else getattr(service, 'dead', False)
class Handler(BaseHTTPRequestHandler):
protocol_version='HTTP/1.1'
def handle_expect_100(self):
if self.command == 'POST' and service_dead():
self.close_connection=True
self.respond(503, {'error':'service failure'})
return False
try:
n=int(self.headers.get('Content-Length','0'))
if n<=0 or n>service.config['server']['max_request_bytes'] or self.headers.get('Transfer-Encoding'):
raise ValueError
except (ValueError,TypeError):
self.close_connection=True
self.respond(400,{'error':'Invalid request size'})
return False
self.send_response_only(100)
self.end_headers()
return True
def setup(self):
super().setup()
self.connection.settimeout(service.config["server"]["socket_timeout_seconds"])
def log_message(self, format, *args):
# Avoid logging request contents, model paths or network endpoints.
pass
def respond(self, status, value):
data = json.dumps(value, ensure_ascii=False, allow_nan=False).encode("utf-8")
self.send_response(status)
self.send_header("Content-Type", "application/json; charset=utf-8")
self.send_header("Content-Length", str(len(data)))
self.end_headers()
self.wfile.write(data)
def do_GET(self):
if self.path.split('?', 1)[0].rstrip('/') == '/health':
if __package__:
from .attention import attention_health
else:
from attention import attention_health
health=service.health()
# Attention backend and runtime versions are information, never warnings.
info=health.setdefault('info',{})
info.update(attention_health())
info['runtime']=getattr(service.backend,'runtime_info',None)
self.respond(200, health)
elif self.path.split('?',1)[0].rstrip('/') == '/engine_stats':
# Read-only engine counters for maintainer usage reconciliation; not used by evaluation.
try: self.respond(200,service.engine_stats())
except Exception: self.respond(503,{'error':'Engine counters unavailable'})
else:
self.respond(404, {'error':'Unknown route'})
def do_POST(self):
# After an unrecoverable engine error or the third consecutive item failure,
# every POST is answered 503 without reading or processing the request.
if service_dead():
self.close_connection=True
self.respond(503, {'error':'service failure'})
return
if self.path.split("?", 1)[0].rstrip("/") != "/v1/systemone":
self.close_connection=True
self.respond(404, {"error": "Unknown route"})
return
try:
if self.headers.get("Transfer-Encoding"):
raise ValueError("Transfer-Encoding is unsupported")
length = int(self.headers.get("Content-Length", "0"))
if length <= 0 or length > service.config["server"]["max_request_bytes"]:
raise ValueError("Invalid request size")
def reject(value):
raise ValueError("Non-finite JSON value")
raw = self.rfile.read(length)
if len(raw) != length:
raise ValueError("Incomplete request body")
payload = json.loads(raw.decode("utf-8"), parse_constant=reject)
# Validate before inference so model ValueError is never a client error.
if __package__:
from .core import normalize_request
else:
from core import normalize_request
normalize_request(payload, service.config["server"]["max_questions"])
except UnsupportedRequest:
self.close_connection=True
self.respond(422,{"error":"Unsupported systemone request"})
return
except (ValueError, TypeError, UnicodeError, OSError):
self.close_connection=True
self.respond(400, {"error": "Invalid systemone request"})
return
# Failures never produce a substitute answer: 422 for one item, 503 for the service.
try:
result = service.answer(payload)
json.dumps(result, allow_nan=False)
except ItemFailure as exc:
print("item failure: "+type(exc.__cause__ or exc).__name__, flush=True)
self.respond(422, {"error": "item could not be processed"})
return
except ServiceFailure as exc:
print("service failure: "+str(exc), flush=True)
self.respond(503, {"error": "service failure"})
return
except Exception as exc:
print("service failure: "+type(exc).__name__, flush=True)
self.respond(503, {"error": "service failure"})
return
self.respond(200, result)
return Handler
def install_extensions(service, config):
"""Serving extensions named in config.json, installed on the running service in this order:
item_deadline (per-decision deadline of the drafting pass, with the item rules of the
`item_rules` block: the question types that may take the drafting pass and the low-margin choice
re-read), then post_calibration (per-type calibration of the reported probabilities). A
configuration without these blocks serves the unchanged service."""
if __package__:
from . import backends, core, item_deadline, post_calibration
else:
import backends, core, item_deadline, post_calibration
if config.get('item_deadline') is not None:
rules = config.get('item_rules') or {}
types = rules.get('slow_types')
service.warmup() # the drafting speed model is timed on a warmed engine, as in the measured setup
item_deadline.install(core, backends, service.backend, config['item_deadline'],
system_prompt=config['prompt']['system']).wrap_service(
service, slow_types=None if types is None or set(types) == {'choice', 'noul', 'score'} else types,
reread_tau=rules.get('reread_tau') or None)
if config.get('post_calibration') is not None:
post_calibration.wrap_service(service, config['post_calibration'], core)
return service
class QuietHTTPServer(ThreadingHTTPServer):
# Request workers must not keep a stopped service alive while draining.
daemon_threads = True
def handle_error(self, request, client_address):
# The base implementation prints a peer endpoint on disconnected clients.
print("HTTP connection failed", flush=True)
def main(argv=None):
parser = argparse.ArgumentParser(description=__doc__)
parser.add_argument("--config", type=Path, default=ROOT / "config.json")
parser.add_argument("--model")
parser.add_argument("--quant", choices=("int8", "bf16", "awq"))
parser.add_argument("--adapter")
parser.add_argument("--backend", choices=("transformers", "vllm"))
parser.add_argument("--bind", choices=BINDS, help="Listening address; defaults to server.bind in config")
parser.add_argument("--port", type=int)
parser.add_argument("--mode", choices=("routed", "uniform", "fast_only"))
parser.add_argument("--calibration", type=Path)
parser.add_argument('--state-dir', type=Path, help='Absolute directory for run state (required)')
parser.add_argument('--run-id')
parser.add_argument('--resume', action='store_true')
parser.add_argument('--model-key')
parser.add_argument('--quota-tier',choices=('normal','hard','long'))
parser.add_argument('--cost-fuse',choices=('on','off'))
parser.add_argument('--no-prefix-caching',action='store_true')
parser.add_argument('--allow-placeholder-threshold',action='store_true')
args = parser.parse_args(argv)
if args.state_dir is None or not args.state_dir.is_absolute():
parser.error("--state-dir must be given as an absolute path")
c = load_json(args.config)
for arg, field in (("model", "path"), ("quant", "quant"), ("adapter", "adapter"), ("backend", "backend")):
if getattr(args, arg) is not None:
c["model"][field] = getattr(args, arg)
for key in ("bind", "port"):
if getattr(args, key) is not None:
c["server"][key] = getattr(args, key)
if args.mode is not None:
c["routing"]["mode"] = args.mode
if args.state_dir is not None:
c['routing']['state_dir'] = str(args.state_dir)
if args.run_id:
c['routing']['run_id'] = args.run_id
c['routing']['resume'] = args.resume
if args.model_key:
c['model']['model_key'] = args.model_key
apply_profile(c)
if __package__: from .core import apply_budget_tier
else: from core import apply_budget_tier
apply_budget_tier(c,args.quota_tier)
if args.mode is not None:c["routing"]["mode"]=args.mode
if args.quant is not None and args.quant!=c['model']['quant']:parser.error('Precision conflicts with model profile')
if args.backend is not None and args.backend!=c['model']['backend']:parser.error('Backend conflicts with model profile')
if args.no_prefix_caching: c["model"]["enable_prefix_caching"]=False
if args.cost_fuse:c['routing']['cost_fuse']['enabled']=args.cost_fuse=='on'
validate_config(c)
validate_threshold(c,args.allow_placeholder_threshold)
if not c["model"]["path"] or not c["server"]["bind"]:
parser.error("Set --model and --bind, or their config fields")
calibration = load_json(args.calibration or ROOT / c["calibration_file"])
validate_calibration(calibration, c["model"]["model_key"])
if __package__:
from .backends import create_backend
from .quota import RuntimeCounter
else:
from backends import create_backend
from quota import RuntimeCounter
counter = RuntimeCounter(c)
service = Service(c, calibration, create_backend(c), counter, allow_placeholder_threshold=args.allow_placeholder_threshold)
install_extensions(service, c)
if c["server"].get("warmup", True):
service.warmup()
httpd = QuietHTTPServer((c["server"]["bind"], c["server"]["port"]), make_handler(service))
print("systemone service ready", flush=True)
try:
httpd.serve_forever()
except KeyboardInterrupt:
pass
finally:
httpd.server_close()
if __name__ == "__main__":
main()
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