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Transport-neutral actuator health and info contracts for Spakky Framework

Project description

Spakky Actuator

Spakky Framework를 위한 transport 중립 actuator 계약입니다.

설치

pip install spakky-actuator

주요 기능

  • Health/readiness/liveness 결과: HTTP, CLI 등 adapter가 공유하는 result 계약
  • Probe 확장 지점: Spakky DI로 등록되는 동기/비동기 health probe
  • Info contributor: 동기/비동기 info contributor의 결정적 병합
  • Startup diagnostics contributor: SpakkyApplication startup report를 actuator info로 노출
  • 예외 처리: Probe 예외를 구조화된 에러 상세가 포함된 비정상 component result로 변환
  • Transport 중립 core: FastAPI, Typer, plugin adapter 의존성 없음

Endpoint Semantics

Surface Meaning Default behavior
health operator-facing status check용 aggregate application health ActuatorEndpoint.HEALTHendpoints에 포함하는 probe 평가
readiness app이 traffic 또는 work를 받을 준비가 되었는지 readiness probe 평가; 필수 unhealthy probe가 있으면 결과 unhealthy
liveness process/framework 생존 여부 외부 dependency readiness와 분리; custom liveness probe가 없으면 healthy baseline 반환
info 결정적 application metadata 등록된 info contributor를 contributor 이름 기준으로 병합

기본적으로 health probe는 liveness가 아니라 healthreadiness에 참여합니다. 외부 의존성을 사용할 수 없다는 이유로 실패하면 안 되는 프로세스 내부 check에만 ActuatorEndpoint.LIVENESS를 사용하세요.

빠른 시작

from spakky.actuator import (
    AbstractHealthProbe,
    ActuatorAggregationService,
    ActuatorExtensionRegistry,
    ComponentHealthResult,
)


class DatabaseProbe(AbstractHealthProbe):
    @property
    def name(self) -> str:
        return "database"

    def check(self) -> ComponentHealthResult:
        return ComponentHealthResult.healthy(self.name)


registry = ActuatorExtensionRegistry()
registry.register_health_probe(DatabaseProbe())

service = ActuatorAggregationService(registry)
health = service.evaluate_health()
readiness = service.evaluate_readiness()

Extension Points

Component health를 제공하려면 AbstractHealthProbe 또는 AbstractAsyncHealthProbe Pod를 등록하세요. info에 metadata를 제공하려면 IInfoContributor 또는 IAsyncInfoContributor Pod를 등록하세요. Actuator 플러그인은 ActuatorExtensionPostProcessor를 추가하여 해당 Pod를 발견하고 ActuatorExtensionRegistry에 저장합니다.

from spakky.actuator import (
    AbstractHealthProbe,
    IInfoContributor,
    ActuatorEndpoint,
    ComponentHealthResult,
)


class ProcessProbe(AbstractHealthProbe):
    @property
    def name(self) -> str:
        return "process"

    @property
    def endpoints(self) -> tuple[ActuatorEndpoint, ...]:
        return (ActuatorEndpoint.LIVENESS,)

    def check(self) -> ComponentHealthResult:
        return ComponentHealthResult.healthy(self.name)


class BuildInfo(IInfoContributor):
    @property
    def name(self) -> str:
        return "build"

    def contribute_info(self) -> dict[str, object]:
        return {"version": "1.0.0"}

Backend plugin은 자신이 소유한 외부 의존 상태를 first-party probe/contributor로 등록합니다. 예를 들어 spakky-redis는 Redis 연결 상태와 cache metrics를 actuator health/info에 연결합니다. 애플리케이션은 transport adapter를 바꾸지 않고 같은 계약으로 자체 check를 추가할 수 있습니다.

라이선스

MIT License

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