Function NewMetricsManager

server/observability/metrics.go:29–124

NewMetricsManager 创建指标管理器

(namespace string)

// NewMetricsManager 创建指标管理器
func NewMetricsManager(namespace string) *MetricsManager {
	if namespace == "" {
		namespace = "aster"
	}

	m := &MetricsManager{
		registry: prometheus.NewRegistry(),
	}

	// HTTP 请求总数
	m.requestsTotal = prometheus.NewCounterVec(
		prometheus.CounterOpts{
			Namespace: namespace,
			Name:      "http_requests_total",
			Help:      "Total number of HTTP requests",
		},
		[]string{"method", "path", "status"},
	)

	// HTTP 请求延迟
	m.requestDuration = prometheus.NewHistogramVec(
		prometheus.HistogramOpts{
			Namespace: namespace,
			Name:      "http_request_duration_seconds",
			Help:      "HTTP request duration in seconds",
			Buckets:   prometheus.DefBuckets,
		},
		[]string{"method", "path"},
	)

	// 请求大小
	m.requestSize = prometheus.NewHistogramVec(
		prometheus.HistogramOpts{
			Namespace: namespace,
			Name:      "http_request_size_bytes",
			Help:      "HTTP request size in bytes",
			Buckets:   prometheus.ExponentialBuckets(100, 10, 8),
		},
		[]string{"method", "path"},
	)

	// 响应大小
	m.responseSize = prometheus.NewHistogramVec(
		prometheus.HistogramOpts{
			Namespace: namespace,
			Name:      "http_response_size_bytes",
			Help:      "HTTP response size in bytes",
			Buckets:   prometheus.ExponentialBuckets(100, 10, 8),
		},
		[]string{"method", "path"},
	)

	// Agents 总数
	m.agentsTotal = prometheus.NewGauge(
		prometheus.GaugeOpts{
			Namespace: namespace,
			Name:      "agents_total",
			Help:      "Total number of agents",