StabilityLevel: metrics.ALPHA,
		},
		[]string{"code"},
	)

	// ProxyLivezTotal is the number of returned HTTP Status for each
	// livez probe.
	ProxyLivezTotal = metrics.NewCounterVec(
		&metrics.CounterOpts{
			Subsystem:      kubeProxySubsystem,
			Name:           "proxy_livez_total",
			Help:           "Cumulative proxy livez HTTP status",
			StabilityLevel: metrics.ALPHA,
		},

	resp.Header().Set("Content-Type", "application/json")
	resp.Header().Set("X-Content-Type-Options", "nosniff")
	if !healthy {
		metrics.ProxyLivezTotal.WithLabelValues("503").Inc()
		resp.WriteHeader(http.StatusServiceUnavailable)
	} else {
		metrics.ProxyLivezTotal.WithLabelValues("200").Inc()
		resp.WriteHeader(http.StatusOK)
		// In older releases, the returned "lastUpdated" time indicated the last

		testMetricEquals(metrics.ProxyHealthzTotal.WithLabelValues("503"), float64(hsTest.tracking503), t)
	}
	if hsTest.url == livezURL {
		testMetricEquals(metrics.ProxyLivezTotal.WithLabelValues("200"), float64(hsTest.tracking200), t)
		testMetricEquals(metrics.ProxyLivezTotal.WithLabelValues("503"), float64(hsTest.tracking503), t)
	}
}

func testMetricEquals(metric basemetrics.CounterMetric, expected float64, t *testing.T) {
	t.Helper()