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handler.go
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/
handler.go
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// SPDX-License-Identifier: Apache-2.0
// Copyright Authors of Hubble
package http
import (
"context"
"strconv"
"time"
"github.com/prometheus/client_golang/prometheus"
flowpb "github.com/cilium/cilium/api/v1/flow"
"github.com/cilium/cilium/pkg/hubble/metrics/api"
)
type httpHandler struct {
requests *prometheus.CounterVec
responses *prometheus.CounterVec
duration *prometheus.HistogramVec
context *api.ContextOptions
}
func (h *httpHandler) Init(registry *prometheus.Registry, options api.Options) error {
c, err := api.ParseContextOptions(options)
if err != nil {
return err
}
h.context = c
h.requests = prometheus.NewCounterVec(prometheus.CounterOpts{
Namespace: api.DefaultPrometheusNamespace,
Name: "http_requests_total",
Help: "Count of HTTP requests",
}, append(h.context.GetLabelNames(), "method", "protocol"))
h.responses = prometheus.NewCounterVec(prometheus.CounterOpts{
Namespace: api.DefaultPrometheusNamespace,
Name: "http_responses_total",
Help: "Count of HTTP responses",
}, append(h.context.GetLabelNames(), "status", "method"))
h.duration = prometheus.NewHistogramVec(prometheus.HistogramOpts{
Namespace: api.DefaultPrometheusNamespace,
Name: "http_request_duration_seconds",
Help: "Quantiles of HTTP request duration in seconds",
}, append(h.context.GetLabelNames(), "method"))
registry.MustRegister(h.requests)
registry.MustRegister(h.responses)
registry.MustRegister(h.duration)
return nil
}
func (h *httpHandler) Status() string {
if h.context == nil {
return ""
}
return h.context.Status()
}
func (h *httpHandler) ProcessFlow(ctx context.Context, flow *flowpb.Flow) {
l7 := flow.GetL7()
if l7 == nil {
return
}
http := l7.GetHttp()
if http == nil {
return
}
labelValues := h.context.GetLabelValues(flow)
if l7.Type == flowpb.L7FlowType_REQUEST {
h.requests.WithLabelValues(append(labelValues, http.Method, http.Protocol)...).Inc()
} else if l7.Type == flowpb.L7FlowType_RESPONSE {
status := strconv.Itoa(int(http.Code))
h.responses.WithLabelValues(append(labelValues, status, http.Method)...).Inc()
h.duration.WithLabelValues(append(labelValues, http.Method)...).Observe(float64(l7.LatencyNs) / float64(time.Second))
}
}