Nik Afiq
657b6aeb22
- Add bootstrap package to initialize application components including logger, tracer, and HTTP server. - Create config package to load runtime settings from environment variables. - Implement observability features including logging, metrics, and tracing. - Add health check and hello use cases with corresponding HTTP handlers. - Introduce middleware for request ID, access logging, metrics, and recovery. - Set up HTTP router with defined routes for health and hello endpoints. - Include tests for health and hello endpoints to ensure proper functionality. - Add OpenTelemetry collector configuration for trace exporting.
59 lines
1.6 KiB
Go
59 lines
1.6 KiB
Go
package observability
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import (
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"net/http"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/client_golang/prometheus/collectors"
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"github.com/prometheus/client_golang/prometheus/promauto"
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"github.com/prometheus/client_golang/prometheus/promhttp"
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)
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// HTTPMetrics contains metric collectors used by HTTP middleware.
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type HTTPMetrics struct {
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RequestsTotal *prometheus.CounterVec
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RequestDuration *prometheus.HistogramVec
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InFlight prometheus.Gauge
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}
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func NewRegistry() *prometheus.Registry {
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registry := prometheus.NewRegistry()
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registry.MustRegister(
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collectors.NewGoCollector(),
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collectors.NewProcessCollector(collectors.ProcessCollectorOpts{}),
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)
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return registry
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}
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func NewHTTPMetrics(registerer prometheus.Registerer) *HTTPMetrics {
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factory := promauto.With(registerer)
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return &HTTPMetrics{
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RequestsTotal: factory.NewCounterVec(
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prometheus.CounterOpts{
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Name: "http_requests_total",
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Help: "Total number of HTTP requests by method, route, and status.",
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},
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[]string{"method", "route", "status"},
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),
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RequestDuration: factory.NewHistogramVec(
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prometheus.HistogramOpts{
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Name: "http_request_duration_seconds",
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Help: "HTTP request duration by method, route, and status.",
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Buckets: prometheus.DefBuckets,
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},
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[]string{"method", "route", "status"},
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),
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InFlight: factory.NewGauge(
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prometheus.GaugeOpts{
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Name: "http_in_flight_requests",
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Help: "Current number of in-flight HTTP requests.",
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},
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),
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}
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}
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func NewPrometheusHandler(registry *prometheus.Registry) http.Handler {
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return promhttp.HandlerFor(registry, promhttp.HandlerOpts{})
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}
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