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handler.go
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handler.go
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// SPDX-License-Identifier: Apache-2.0
// Copyright 2019 Authors of Hubble
package flow
import (
"context"
"fmt"
flowpb "github.com/cilium/cilium/api/v1/flow"
v1 "github.com/cilium/cilium/pkg/hubble/api/v1"
"github.com/cilium/cilium/pkg/hubble/metrics/api"
monitorAPI "github.com/cilium/cilium/pkg/monitor/api"
"github.com/prometheus/client_golang/prometheus"
)
type flowHandler struct {
flows *prometheus.CounterVec
context *api.ContextOptions
}
func (h *flowHandler) Init(registry *prometheus.Registry, options api.Options) error {
c, err := api.ParseContextOptions(options)
if err != nil {
return err
}
h.context = c
labels := []string{"protocol", "type", "subtype", "verdict"}
labels = append(labels, h.context.GetLabelNames()...)
h.flows = prometheus.NewCounterVec(prometheus.CounterOpts{
Namespace: api.DefaultPrometheusNamespace,
Name: "flows_processed_total",
Help: "Total number of flows processed",
}, labels)
registry.MustRegister(h.flows)
return nil
}
func (h *flowHandler) Status() string {
return h.context.Status()
}
func (h *flowHandler) ProcessFlow(ctx context.Context, flow *flowpb.Flow) {
var typeName, subType string
eventType := flow.GetEventType().GetType()
switch eventType {
case monitorAPI.MessageTypeAccessLog:
typeName = "L7"
if l7 := flow.GetL7(); l7 != nil {
switch {
case l7.GetDns() != nil:
subType = "DNS"
case l7.GetHttp() != nil:
subType = "HTTP"
case l7.GetKafka() != nil:
subType = "Kafka"
}
}
case monitorAPI.MessageTypeDrop:
typeName = "Drop"
case monitorAPI.MessageTypeCapture:
typeName = "Capture"
case monitorAPI.MessageTypeTrace:
typeName = "Trace"
subType = monitorAPI.TraceObservationPoints[uint8(flow.GetEventType().SubType)]
case monitorAPI.MessageTypePolicyVerdict:
typeName = "PolicyVerdict"
default:
typeName = "Unknown"
subType = fmt.Sprintf("%d", eventType)
}
labels := []string{v1.FlowProtocol(flow), typeName, subType, flow.GetVerdict().String()}
labels = append(labels, h.context.GetLabelValues(flow)...)
h.flows.WithLabelValues(labels...).Inc()
}