пофикшен redis и логи redis

app/runtime/metrics.py

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+"""OpenTelemetry metrics bootstrap and application instruments."""
+
+from opentelemetry import metrics
+from opentelemetry.exporter.otlp.proto.grpc.metric_exporter import OTLPMetricExporter
+from opentelemetry.sdk.metrics import MeterProvider
+from opentelemetry.sdk.metrics.export import PeriodicExportingMetricReader
+from opentelemetry.sdk.resources import Resource
+
+from app.config import ObservabilityConfig
+
+
+_METER_PROVIDER: MeterProvider | None = None
+_CACHE_METRICS: "CacheMetrics | None" = None
+
+
+class CacheMetrics:
+    """Metrics emitted by the Redis-backed price cache."""
+
+    def __init__(self) -> None:
+        meter = metrics.get_meter("app.repositories.cache")
+        self._requests = meter.create_counter(
+            "cache_requests_total",
+            unit="{request}",
+            description="Number of cache operations by operation and outcome.",
+        )
+        self._errors = meter.create_counter(
+            "cache_errors_total",
+            unit="{error}",
+            description="Number of failed cache operations by error type.",
+        )
+        self._hit_ratio = meter.create_histogram(
+            "cache_hit_ratio",
+            unit="1",
+            description="Cache lookup result: 1 for a hit and 0 for a miss.",
+        )
+
+    def record_request(self, *, operation: str, outcome: str) -> None:
+        self._requests.add(1, {"operation": operation, "outcome": outcome})
+
+    def record_error(self, *, operation: str, error_type: str) -> None:
+        self._errors.add(1, {"operation": operation, "error.type": error_type})
+
+    def record_hit(self, *, hit: bool) -> None:
+        self._hit_ratio.record(1.0 if hit else 0.0)
+
+
+def configure_metrics(observability: ObservabilityConfig) -> None:
+    """Configure the process-wide OTLP metrics exporter once."""
+
+    global _METER_PROVIDER
+
+    if not observability.enabled or _METER_PROVIDER is not None:
+        return
+
+    meter_provider = _build_meter_provider(observability)
+    metrics.set_meter_provider(meter_provider)
+    _METER_PROVIDER = meter_provider
+
+
+def get_cache_metrics() -> CacheMetrics:
+    """Return the process-wide cache instruments."""
+
+    global _CACHE_METRICS
+
+    if _CACHE_METRICS is None:
+        _CACHE_METRICS = CacheMetrics()
+    return _CACHE_METRICS
+
+
+def _build_meter_provider(observability: ObservabilityConfig) -> MeterProvider:
+    exporter = OTLPMetricExporter(
+        endpoint=observability.otlp_endpoint,
+        insecure=observability.otlp_insecure,
+    )
+    reader = PeriodicExportingMetricReader(exporter)
+    resource = Resource.create({"service.name": observability.service_name})
+    return MeterProvider(resource=resource, metric_readers=[reader])