LLM_BUSY_MODE=reject answers blocked LLM requests immediately with
LLM_BUSY_STATUS (default 503, 429 works) and Retry-After, so routers
like LiteLLM can cool down and retry instead of holding a hung
connection. The default wait mode now also sends Retry-After when
LLM_WAIT_TIMEOUT expires. Document the service account (LocalSystem
default, NT SERVICE virtual-account hardening) and the Program
Files / ProgramData install layout.
- internal/config: .env-style config file (gpu-turnstile.env next to the
exe, -config flag or GPU_TURNSTILE_CONFIG); process env overrides file.
- internal/service: Windows service via golang.org/x/sys/windows/svc —
graceful SCM stop, 'service install/remove' commands, restart-on-failure
recovery (also applies staged updates). First external dependency,
Windows-only; Linux/Docker build unaffected (go.mod stays at 1.23).
- internal/update: polls the Gitea releases API, verifies the Ed25519
signature of the downloaded binary against an embedded public key
(openssl-signed by CI), swaps it in next to the running exe, and once
the GPU lock is idle exits with code 3 so service recovery restarts
onto the new version. Dev builds and empty pubkey never update.
- CI: tag builds additionally produce gpu-turnstile.exe + .sig + .sha256
attached to a Gitea release.
- LOG_FILE env var so the service has somewhere to log.
Backoff now covers all dial-phase errors (refused, timeout, DNS), TLS
handshake failures, and 5xx responses with replayable bodies; streamed
POSTs are never replayed to avoid duplicate work. First retry of an
episode logs at WARN, subsequent attempts at INFO.
LOGLEVEL (LOG_LEVEL kept as alias) now defaults to warn: startup logs
version plus every setting; INFO adds one line per incoming request and
per response with status/duration, ANSI-colored in text mode (bypasses
slog's escaping so colors render in docker compose logs); NO_COLOR or
LOG_FORMAT=json disables colors.
A refused dial (service down/restarting) is retried with a wait that
doubles from BACKOFF_INITIAL (1s) up to BACKOFF_MAX (60s) until the
upstream answers or the client disconnects. Handles the Windows WSA
errno (10061) as well as POSIX ECONNREFUSED. compose.yaml.example now
uses host.docker.internal like the working local deployment.
The proxy now listens on the standard service ports (Ollama :11434,
ComfyUI :8188) and the actual services move one port up (:11435, :8189).
Metric prefix is now gpu_turnstile_.
mram