3 Commits

Author	SHA1	Message	Date
mudler's LocalAI [bot]	465d488c90	fix(distributed): reject wrong-model requests at the backend (#10970) ... fix(distributed): reject wrong-model requests at the backend (#10952) In distributed mode the controller caches a NodeModel row naming a backend's host:port. A worker can recycle a stopped backend's gRPC port for a different model's backend, and probeHealth verifies liveness rather than identity, so the probe succeeds against whatever now occupies the port and the request is dispatched to the wrong backend. The caller gets a silent wrong-model answer. Nothing in the request could catch this: PredictOptions had no model field, so model identity crossed the wire only in ModelOptions.Model at LoadModel time, and the cached-hit path issues no LoadModel. Every backend's "model not loaded" guard checks a nil handle, which a process holding a different model passes, so the stale row was never dropped either. Add PredictOptions.ModelIdentity and enforce it at the point of use: - The controller populates it in gRPCPredictOpts from ModelConfig.Model, the same expression ModelOptions feeds to model.WithModel and therefore the same value the backend received as ModelOptions.Model. Both are read from one config value in one function, so they are equal by construction and the comparison cannot false-reject. - Backends compare it against what they loaded and return NOT_FOUND with a fixed sentinel. Enforced in pkg/grpc/server.go (27 Go backends), an interceptor in backend/python/common (all 36 Python backends, no per-backend change), and the llama-cpp / ik-llama-cpp / ds4 C++ servers. That is every backend with real exposure: kokoros answers all four RPCs with unimplemented and privacy-filter implements none of them. - The router's reconcile drops the stale replica row on a mismatch, so the next request reloads somewhere correct. Empty means "skip the check" on both sides: a controller that predates the field sends nothing, a backend loaded by such a controller has nothing to compare, and the C++ server synthesizes PredictOptions internally for ASR. That keeps upgrades working in both directions. Scoped to the four PredictOptions RPCs. TTSRequest.model and SoundGenerationRequest.model are deliberately NOT validated: FileStagingClient already rewrites them to worker-local absolute paths, so in distributed mode they already differ from the load-time value and comparing them would reject valid requests. IsModelMismatch requires both the NOT_FOUND code and the sentinel, unlike the neighbouring helpers which accept either. insightface's Embedding returns NOT_FOUND "no face detected" on a PredictOptions RPC, and a code-only check would drop a healthy replica row on every faceless image. Assisted-by: Claude Code:claude-opus-4-8[1m] [Read] [Edit] [Bash] Signed-off-by: Ettore Di Giacinto <mudler@localai.io> Co-authored-by: Ettore Di Giacinto <mudler@localai.io>	2026-07-20 13:05:47 +02:00
LocalAI [bot]	a4e6e01e4d	fix(process): give backend workers a parent-death safety net (#10639) ... * fix(grpc): self-terminate backend workers when LocalAI dies non-gracefully Symptom: a backend model-worker subprocess (the per-model gRPC server LocalAI spawns) can be orphaned and linger — holding VRAM and its listen port — if the LocalAI process is killed non-gracefully (e.g. a supervisor's graceful-shutdown grace period elapses and LocalAI is SIGKILLed) before its own teardown runs. Root cause: LocalAI's graceful teardown (pkg/signals/handler.go installs the SIGINT/SIGTERM handler; core/cli/run.go registers app.Shutdown -> ModelLoader.StopAllGRPC -> process.Stop in pkg/model/process.go) only runs when LocalAI receives a catchable signal and survives long enough to run its handlers. Backends are spawned via github.com/mudler/go-processmanager v0.1.1, whose getSysProcAttr() sets Setpgid:true (own process group, so the group can be signalled) but never PR_SET_PDEATHSIG/Pdeathsig, and exposes no Config field or option for a caller to inject/extend SysProcAttr. LocalAI fully delegates spawning to that library (it never builds the exec.Cmd itself), so it cannot set a kernel parent-death signal at the spawn site. If LocalAI is SIGKILLed, nothing tells the backend to exit and it is reparented to init. Fix: add a best-effort, backend-side safety net at the one shared choke point every out-of-process Go backend routes through — grpc.StartServer / RunServer in pkg/grpc. On startup it captures getppid() and polls; when the process is reparented (getppid changes / becomes 1 — the standard POSIX signal the original parent died) it logs and self-terminates. getppid() reparent detection is portable (Linux + macOS), unlike Linux-only PR_SET_PDEATHSIG. Toggle via LOCALAI_BACKEND_PARENT_WATCH (default on; off on Windows) and LOCALAI_BACKEND_PARENT_WATCH_INTERVAL. This is strictly a backstop alongside the existing graceful SIGTERM->grace->SIGKILL teardown, which is unchanged. Scope/limitations: covers Go-based backends (everything using pkg/grpc). The C++ backends (e.g. llama-cpp) and Python backends do not route through pkg/grpc and are not covered by this mechanism — they would each need an equivalent parent-death check (follow-up). The fully general fix is for go-processmanager to expose SysProcAttr injection so LocalAI can set Pdeathsig at spawn for every backend regardless of language (suggested upstream follow-up; out of scope for this LocalAI-only PR). Test: pkg/grpc/parentwatch_test.go builds a real test -> middle -> grandchild process tree, lets the middle process exit to orphan the grandchild running the real watchParentDeath, and asserts it detects the reparent and self-terminates. Unix-only (build-tagged), runs in CI (Linux). Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Signed-off-by: Ettore Di Giacinto <mudler@localai.io> * fix(process): extend parent-death backstop to C++ and Python backends The Go parent-death watcher (pkg/grpc/parentwatch.go, commit 772b435d5) only protects backends that route through pkg/grpc. C++ and Python backends don't, so the originally-reported case — the llama.cpp gRPC worker surviving a non-graceful LocalAI death — was still uncovered. Extend the same best-effort backstop to both languages, reusing the exact mechanism and semantics: - capture getppid() at startup, skip if already orphaned (<=1) - a background thread polls getppid() and self-exits on reparenting (getppid() != orig || == 1), portable across Linux/macOS, no-op on Windows - same env vars: LOCALAI_BACKEND_PARENT_WATCH (default on; falsy false/0/no/off disable) and LOCALAI_BACKEND_PARENT_WATCH_INTERVAL (default 2s; accepts Go-style durations like 500ms/2s/1m) C++: implemented in backend/cpp/llama-cpp (the reported, most-used C++ backend) as a dependency-free header parent_watch.h, wired into grpc-server.cpp's main() and copied at build time via prepare.sh. C++ backends have no shared server scaffolding, so other C++ backends (ds4, ik-llama-cpp, privacy-filter, ...) are not yet covered and would each need the same one-line include+call as follow-ups. Python: implemented once in the shared common/parent_watch.py and armed from common/grpc_auth.py's get_auth_interceptors() — the single helper every one of the 35 Python backends invokes while building its gRPC server — so all Python backends (and future ones) are covered with no per-backend edits and no duplicated implementation. Tests (real process-tree reparent detection, mirroring the Go test): - backend/cpp/llama-cpp/parent_watch_test.cpp (via run-unit-tests.sh) - backend/python/common/parent_watch_test.py (python -m unittest) Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Signed-off-by: Ettore Di Giacinto <mudler@localai.io> --------- Signed-off-by: Ettore Di Giacinto <mudler@localai.io> Co-authored-by: Ettore Di Giacinto <mudler@localai.io> Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com>	2026-07-02 19:16:48 +02:00
Ettore Di Giacinto	59108fbe32	feat: add distributed mode (#9124) ... * feat: add distributed mode (experimental) Signed-off-by: Ettore Di Giacinto <mudler@localai.io> * fix data races, mutexes, transactions Signed-off-by: Ettore Di Giacinto <mudler@localai.io> * refactorings Signed-off-by: Ettore Di Giacinto <mudler@localai.io> * fixups Signed-off-by: Ettore Di Giacinto <mudler@localai.io> * fix events and tool stream in agent chat Signed-off-by: Ettore Di Giacinto <mudler@localai.io> * use ginkgo Signed-off-by: Ettore Di Giacinto <mudler@localai.io> * refactoring and consolidation Signed-off-by: Ettore Di Giacinto <mudler@localai.io> * refactoring and consolidation Signed-off-by: Ettore Di Giacinto <mudler@localai.io> * refactoring and consolidation Signed-off-by: Ettore Di Giacinto <mudler@localai.io> * refactoring and consolidation Signed-off-by: Ettore Di Giacinto <mudler@localai.io> * refactoring and consolidation Signed-off-by: Ettore Di Giacinto <mudler@localai.io> * refactoring and consolidation Signed-off-by: Ettore Di Giacinto <mudler@localai.io> * refactoring and consolidation Signed-off-by: Ettore Di Giacinto <mudler@localai.io> * refactoring and consolidation Signed-off-by: Ettore Di Giacinto <mudler@localai.io> * fix(cron): compute correctly time boundaries avoiding re-triggering Signed-off-by: Ettore Di Giacinto <mudler@localai.io> * enhancements, refactorings Signed-off-by: Ettore Di Giacinto <mudler@localai.io> * do not flood of healthy checks Signed-off-by: Ettore Di Giacinto <mudler@localai.io> * do not list obvious backends as text backends Signed-off-by: Ettore Di Giacinto <mudler@localai.io> * tests fixups Signed-off-by: Ettore Di Giacinto <mudler@localai.io> * refactoring and consolidation Signed-off-by: Ettore Di Giacinto <mudler@localai.io> * Drop redundant healthcheck Signed-off-by: Ettore Di Giacinto <mudler@localai.io> * enhancements, refactorings Signed-off-by: Ettore Di Giacinto <mudler@localai.io> --------- Signed-off-by: Ettore Di Giacinto <mudler@localai.io>	2026-03-30 00:47:27 +02:00