ready                 []ready.Prober
	prometheus            *PrometheusScrapeConfiguration
	mutex                 sync.RWMutex
	appProbersDestination string
	appKubeProbers        KubeAppProbers
	appProbeClient        map[string]*http.Client
	statusPort            uint16
	lastProbeSuccessful   bool
	envoyStatsPort        int
	fetchDNS              func() *dnsProto.NameTable
	upstreamLocalAddress  *net.TCPAddr