in pkg/controller/liveness/liveness.go [207:215]
func (hc *HealthCheck) serveHTTP(w http.ResponseWriter, r *http.Request) {
hc.mutex.RLock()
defer hc.mutex.RUnlock()
if !hc.syncMonitoringEnabled || hc.alive {
w.WriteHeader(200)
} else {
w.WriteHeader(500)
}
}