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package handlers
import (
"context"
"fmt"
"log"
"net/http"
"github.com/coreos/discovery.etcd.io/handlers/httperror"
"github.com/prometheus/client_golang/prometheus"
)
var healthCounter *prometheus.CounterVec
func init() {
healthCounter = prometheus.NewCounterVec(
prometheus.CounterOpts{
Name: "endpoint_health_requests_total",
Help: "How many /health requests processed, partitioned by status code and HTTP method.",
},
[]string{"code", "method"},
)
prometheus.MustRegister(healthCounter)
}
func HealthHandler(ctx context.Context, w http.ResponseWriter, r *http.Request) {
st := ctx.Value(stateKey).(*State)
token, err := st.setupToken(0)
if err != nil || token == "" {
log.Printf("health failed to setupToken %v", err)
httperror.Error(w, r, "health failed to setupToken", 400, healthCounter)
return
}
err = st.deleteToken(token)
if err != nil {
log.Printf("health failed to deleteToken %v", err)
httperror.Error(w, r, "health failed to deleteToken", 400, healthCounter)
return
}
fmt.Fprintf(w, "OK")
healthCounter.WithLabelValues("200", r.Method).Add(1)
}
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