Merge pull request #124 from maxime1907/feat-config-zap

feat: support advanced zap configuration

Dockerfile

@@ -23,6 +23,7 @@ RUN go mod vendor
 FROM scratch as simple
 COPY --from=builder /w/bin/goldpinger /goldpinger
 COPY ./static /static
+COPY ./config /config
 ENTRYPOINT ["/goldpinger", "--static-file-path", "/static"]
 
 # For vendor builds, use the simple build and add the vendor'd files

Makefile

@@ -1,5 +1,5 @@
 name ?= goldpinger
-version ?= v3.4.0
+version ?= v3.7.0
 bin ?= goldpinger
 pkg ?= "github.com/bloomberg/goldpinger"
 tag = $(name):$(version)

README.md

@@ -231,7 +231,7 @@ You can also see [an example of using `kubeconfig` in the `./extras`](./extras/e
 
 ### Using with IPv4/IPv6 dual-stack
 
-If your pods having IPv4 and IPv6 addresses assigned and you want to test communication over IPv6, you can specify the `USE_IPV6` environment variable which will use the IPv6 address on the pod and host.
+If your cluster IPv4/IPv6 dual-stack and you want to force IPv6, you can set the `IP_VERSIONS` environment variable to "6" (default is "4") which will use the IPv6 address on the pod and host.
 
 ![ipv6](./extras/screenshot-ipv6.png)
 
@@ -256,6 +256,27 @@ and `goldpinger` should show something like this:
 
 ![screenshot-DNS-resolution](./extras/dns-screenshot.png)
 
+### TCP and HTTP checks to external targets
+
+Instances can also be configured to do simple TCP or HTTP checks on external targets. This is useful for visualizing more nuanced connectivity flows.
+
+```sh
+      --tcp-targets=             A list of external targets(<host>:<port> or <ip>:<port>) to attempt a TCP check on (space delimited) [$TCP_TARGETS]
+      --http-targets=            A  list of external targets(<http or https>://<url>) to attempt an HTTP{S} check on. A 200 HTTP code is considered successful. (space delimited) [$HTTP_TARGETS]
+      --tcp-targets-timeout=  The timeout for a tcp check on the provided tcp-targets (default: 500) [$TCP_TARGETS_TIMEOUT]
+      --dns-targets-timeout=  The timeout for a tcp check on the provided udp-targets (default: 500) [$DNS_TARGETS_TIMEOUT]
+```
+
+```yaml
+        - name: HTTP_TARGETS
+          value: http://bloomberg.com
+        - name: TCP_TARGETS
+          value: 10.34.5.141:5000 10.34.195.193:6442
+```
+
+the timeouts for the TCP, DNS and HTTP checks can be configured via `TCP_TARGETS_TIMEOUT`, `DNS_TARGETS_TIMEOUT` and `HTTP_TARGETS_TIMEOUT` respectively. 
+
+![screenshot-tcp-http-checks](./extras/tcp-checks-screenshot.png)
 
 ## Usage
 

cmd/goldpinger/main.go

@@ -15,8 +15,12 @@
 package main
 
 import (
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"log"
 	"os"
-	"strconv"
+	"time"
 
 	"github.com/go-openapi/loads"
 	"go.uber.org/zap"
@@ -36,37 +40,32 @@ var (
 	Version, Build string
 )
 
-func getLogger() *zap.Logger {
+func getLogger(zapconfigpath string) (*zap.Logger, error) {
 	var logger *zap.Logger
 	var err error
 
-	// We haven't parsed flags at this stage and that might be error prone
-	// so just use an envvar
-	if debug, err := strconv.ParseBool(os.Getenv("DEBUG")); err == nil && debug {
-		logger, err = zap.NewDevelopment()
-	} else {
-		logger, err = zap.NewProduction()
-	}
+	zapconfigJSON, err := ioutil.ReadFile(zapconfigpath)
 	if err != nil {
-		panic(err)
+		return nil, fmt.Errorf("Could not read zap config file: %w", err)
 	}
-	zap.ReplaceGlobals(logger)
-	return logger
+
+	var cfg zap.Config
+	if err := json.Unmarshal(zapconfigJSON, &cfg); err != nil {
+		return nil, fmt.Errorf("Could not read zap config as json: %w", err)
+	}
+	logger, err = cfg.Build()
+	if err != nil {
+		return nil, fmt.Errorf("Could not build zap config: %w", err)
+	}
+
+	return logger, nil
 }
 
 func main() {
-	logger := getLogger()
-	defer logger.Sync()
-
-	undo := zap.RedirectStdLog(logger)
-	defer undo()
-
-	logger.Info("Goldpinger", zap.String("version", Version), zap.String("build", Build))
-
 	// load embedded swagger file
 	swaggerSpec, err := loads.Analyzed(restapi.SwaggerJSON, "")
 	if err != nil {
-		logger.Error("Coud not parse swagger", zap.Error(err))
+		log.Fatalf("Could not parse swagger: %v", err)
 	}
 
 	// create new service API
@@ -83,7 +82,7 @@ func main() {
 	for _, optsGroup := range api.CommandLineOptionsGroups {
 		_, err := parser.AddGroup(optsGroup.ShortDescription, optsGroup.LongDescription, optsGroup.Options)
 		if err != nil {
-			logger.Error("Coud not add flag group", zap.Error(err))
+			log.Fatalf("Could not add flag group: %v", err)
 		}
 	}
 
@@ -97,6 +96,23 @@ func main() {
 		os.Exit(code)
 	}
 
+	// Configure logger
+	logger, err := getLogger(goldpinger.GoldpingerConfig.ZapConfigPath)
+	if err != nil {
+		var errDev error
+		logger, errDev = zap.NewDevelopment()
+		if errDev != nil {
+			log.Fatalf("Could not build a development logger: %v", errDev)
+		}
+		logger.Warn("Logger could not be built, defaulting to development settings", zap.String("error", fmt.Sprintf("%v", err)))
+	}
+	defer logger.Sync()
+
+	undo := zap.RedirectStdLog(logger)
+	defer undo()
+
+	logger.Info("Goldpinger", zap.String("version", Version), zap.String("build", Build))
+
 	if goldpinger.GoldpingerConfig.Namespace == nil {
 		goldpinger.GoldpingerConfig.Namespace = &goldpinger.PodNamespace
 	} else {
@@ -144,6 +160,23 @@ func main() {
 		logger.Error("Unknown IP version specified: expected values are 4 or 6", zap.Strings("IPVersions", goldpinger.GoldpingerConfig.IPVersions))
 	}
 
+	// Handle deprecated flags
+	if int(goldpinger.GoldpingerConfig.PingTimeout) == 0 {
+		logger.Warn("ping-timeout-ms is deprecated in favor of ping-timeout and will be removed in the future",
+			zap.Int64("ping-timeout-ms", goldpinger.GoldpingerConfig.PingTimeoutMs))
+		goldpinger.GoldpingerConfig.PingTimeout = time.Duration(goldpinger.GoldpingerConfig.PingTimeoutMs) * time.Millisecond
+	}
+	if int(goldpinger.GoldpingerConfig.CheckTimeout) == 0 {
+		logger.Warn("check-timeout-ms is deprecated in favor of check-timeout and will be removed in the future",
+			zap.Int64("check-timeout-ms", goldpinger.GoldpingerConfig.CheckTimeoutMs))
+		goldpinger.GoldpingerConfig.CheckTimeout = time.Duration(goldpinger.GoldpingerConfig.CheckTimeoutMs) * time.Millisecond
+	}
+	if int(goldpinger.GoldpingerConfig.CheckAllTimeout) == 0 {
+		logger.Warn("check-all-timeout-ms is deprecated in favor of check-all-timeout will be removed in the future",
+			zap.Int64("check-all-timeout-ms", goldpinger.GoldpingerConfig.CheckAllTimeoutMs))
+		goldpinger.GoldpingerConfig.CheckAllTimeout = time.Duration(goldpinger.GoldpingerConfig.CheckAllTimeoutMs) * time.Millisecond
+	}
+
 	server.ConfigureAPI()
 	goldpinger.StartUpdater()
 

config/zap.json

@@ -0,0 +1,21 @@
+{
+    "level": "info",
+    "encoding": "json",
+    "outputPaths": [
+        "stdout"
+    ],
+    "errorOutputPaths": [
+        "stderr"
+    ],
+    "initialFields": {
+    },
+    "encoderConfig": {
+        "messageKey": "message",
+        "levelKey": "level",
+        "levelEncoder": "lowercase",
+        "timeKey": "ts",
+        "timeEncoder": "ISO8601",
+        "callerKey": "caller",
+        "callerEncoder": "Short"
+    }
+}

go.mod

@@ -5,7 +5,7 @@ go 1.15
 require (
 	github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973 // indirect
 	github.com/cespare/xxhash v1.1.0
-	github.com/go-openapi/errors v0.20.0
+	github.com/go-openapi/errors v0.20.2
 	github.com/go-openapi/loads v0.19.5
 	github.com/go-openapi/runtime v0.19.26
 	github.com/go-openapi/spec v0.19.8

go.sum

@@ -91,6 +91,8 @@ github.com/go-openapi/errors v0.19.6/go.mod h1:cM//ZKUKyO06HSwqAelJ5NsEMMcpa6VpX
 github.com/go-openapi/errors v0.19.8/go.mod h1:cM//ZKUKyO06HSwqAelJ5NsEMMcpa6VpXe8DOa1Mi1M=
 github.com/go-openapi/errors v0.20.0 h1:Sxpo9PjEHDzhs3FbnGNonvDgWcMW2U7wGTcDDSFSceM=
 github.com/go-openapi/errors v0.20.0/go.mod h1:cM//ZKUKyO06HSwqAelJ5NsEMMcpa6VpXe8DOa1Mi1M=
+github.com/go-openapi/errors v0.20.2 h1:dxy7PGTqEh94zj2E3h1cUmQQWiM1+aeCROfAr02EmK8=
+github.com/go-openapi/errors v0.20.2/go.mod h1:cM//ZKUKyO06HSwqAelJ5NsEMMcpa6VpXe8DOa1Mi1M=
 github.com/go-openapi/jsonpointer v0.0.0-20160704185906-46af16f9f7b1/go.mod h1:+35s3my2LFTysnkMfxsJBAMHj/DoqoB9knIWoYG/Vk0=
 github.com/go-openapi/jsonpointer v0.17.0/go.mod h1:cOnomiV+CVVwFLk0A/MExoFMjwdsUdVpsRhURCKh+3M=
 github.com/go-openapi/jsonpointer v0.18.0/go.mod h1:cOnomiV+CVVwFLk0A/MExoFMjwdsUdVpsRhURCKh+3M=

pkg/goldpinger/client.go

@@ -37,15 +37,12 @@ func CheckNeighbours(ctx context.Context) *models.CheckResults {
 	// Mux to prevent concurrent map address
 	checkResultsMux.Lock()
 	defer checkResultsMux.Unlock()
-
 	final := models.CheckResults{}
 	final.PodResults = make(map[string]models.PodResult)
 	for podName, podResult := range checkResults.PodResults {
 		final.PodResults[podName] = podResult
 	}
-	if len(GoldpingerConfig.DnsHosts) > 0 {
-		final.DNSResults = *checkDNS()
-	}
+	final.ProbeResults = checkTargets()
 	return &final
 }
 
@@ -127,22 +124,58 @@ func pickPodHostIP(podIP, hostIP string) string {
 	return podIP
 }
 
-func checkDNS() *models.DNSResults {
-	results := models.DNSResults{}
-	for _, host := range GoldpingerConfig.DnsHosts {
-
-		var dnsResult models.DNSResult
-
-		start := time.Now()
-		_, err := net.LookupIP(host)
-		if err != nil {
-			dnsResult.Error = err.Error()
-			CountDnsError(host)
-		}
-		dnsResult.ResponseTimeMs = time.Since(start).Nanoseconds() / int64(time.Millisecond)
-		results[host] = dnsResult
+func checkTargets() models.ProbeResults {
+	results := make(map[string][]models.ProbeResult)
+	probes := []struct {
+		protocol string
+		hosts    []string
+		probeFn  func(addr string, timeout time.Duration) error
+		statFn   func(host string)
+		timeout  time.Duration
+	}{
+		{
+			protocol: "dns",
+			hosts:    GoldpingerConfig.DnsHosts,
+			probeFn:  doDNSProbe,
+			statFn:   CountDnsError,
+			timeout:  GoldpingerConfig.DnsCheckTimeout,
+		},
+		{
+			protocol: "http",
+			hosts:    GoldpingerConfig.HTTPTargets,
+			probeFn:  doHTTPProbe,
+			statFn:   CountHttpError,
+			timeout:  GoldpingerConfig.HTTPCheckTimeout,
+		},
+		{
+			protocol: "tcp",
+			hosts:    GoldpingerConfig.TCPTargets,
+			probeFn:  doTCPProbe,
+			statFn:   CountTcpError,
+			timeout:  GoldpingerConfig.TCPCheckTimeout,
+		},
 	}
-	return &results
+
+	for _, probe := range probes {
+		for _, host := range probe.hosts {
+			if _, ok := results[host]; !ok {
+				results[host] = []models.ProbeResult{}
+			}
+
+			res := models.ProbeResult{Protocol: probe.protocol}
+			start := time.Now()
+			err := probe.probeFn(host, probe.timeout)
+			if err != nil {
+				res.Error = err.Error()
+				probe.statFn(host)
+			}
+
+			res.ResponseTimeMs = time.Since(start).Milliseconds()
+			results[host] = append(results[host], res)
+		}
+	}
+
+	return results
 }
 
 // CheckServicePodsResult results of the /check operation
@@ -195,7 +228,7 @@ func CheckAllPods(checkAllCtx context.Context, pods map[string]*GoldpingerPod) *
 			} else {
 				checkCtx, cancel := context.WithTimeout(
 					checkAllCtx,
-					time.Duration(GoldpingerConfig.CheckTimeoutMs)*time.Millisecond,
+					GoldpingerConfig.CheckTimeout,
 				)
 				defer cancel()
 
@@ -238,15 +271,15 @@ func CheckAllPods(checkAllCtx context.Context, pods map[string]*GoldpingerPod) *
 			PodIP:   response.podIPv4,
 		})
 		if response.checkAllPodResult.Response != nil &&
-			response.checkAllPodResult.Response.DNSResults != nil {
-			if result.DNSResults == nil {
-				result.DNSResults = make(map[string]models.DNSResults)
+			response.checkAllPodResult.Response.ProbeResults != nil {
+			if result.ProbeResults == nil {
+				result.ProbeResults = make(map[string]models.ProbeResults)
 			}
-			for host := range response.checkAllPodResult.Response.DNSResults {
-				if result.DNSResults[host] == nil {
-					result.DNSResults[host] = make(map[string]models.DNSResult)
+			for host := range response.checkAllPodResult.Response.ProbeResults {
+				if result.ProbeResults[host] == nil {
+					result.ProbeResults[host] = make(map[string][]models.ProbeResult)
 				}
-				result.DNSResults[host][response.podName] = response.checkAllPodResult.Response.DNSResults[host]
+				result.ProbeResults[host][response.podName] = response.checkAllPodResult.Response.ProbeResults[host]
 			}
 		}
 	}

pkg/goldpinger/config.go

@@ -15,12 +15,15 @@
 package goldpinger
 
 import (
+	"time"
+
 	"k8s.io/client-go/kubernetes"
 )
 
 // GoldpingerConfig represents the configuration for goldpinger
 var GoldpingerConfig = struct {
 	StaticFilePath   string  `long:"static-file-path" description:"Folder for serving static files" env:"STATIC_FILE_PATH"`
+	ZapConfigPath    string  `long:"zap-config" description:"Path to zap config file" env:"ZAP_CONFIG" default:"/config/zap.json"`
 	KubeConfigPath   string  `long:"kubeconfig" description:"Path to kubeconfig file" env:"KUBECONFIG"`
 	RefreshInterval  int     `long:"refresh-interval" description:"If > 0, will create a thread and collect stats every n seconds" env:"REFRESH_INTERVAL" default:"30"`
 	JitterFactor     float64 `long:"jitter-factor" description:"The amount of jitter to add while pinging clients" env:"JITTER_FACTOR" default:"0.05"`
@@ -35,12 +38,20 @@ var GoldpingerConfig = struct {
 	DisplayNodeName  bool    `long:"display-nodename" description:"Display nodename other than podname in UI (defaults is podname)." env:"DISPLAY_NODENAME"`
 	KubernetesClient *kubernetes.Clientset
 
-	DnsHosts []string `long:"host-to-resolve" description:"A host to attempt dns resolve on (space delimited)" env:"HOSTS_TO_RESOLVE" env-delim:" "`
+	DnsHosts    []string `long:"host-to-resolve" description:"A host to attempt dns resolve on (space delimited)" env:"HOSTS_TO_RESOLVE" env-delim:" "`
+	TCPTargets  []string `long:"tcp-targets" description:"A list of external targets(<host>:<port> or <ip>:<port>) to attempt a TCP check on (space delimited)" env:"TCP_TARGETS" env-delim:" "`
+	HTTPTargets []string `long:"http-targets" description:"A list of external targets(<http or https>://<url>) to attempt an HTTP{S} check on. A 200 HTTP code is considered successful.(space delimited)" env:"HTTP_TARGETS" env-delim:" "`
 
 	IPVersions []string `long:"ip-versions" description:"The IP versions to use (space delimited). Possible values are 4 and 6 (defaults to 4)." env:"IP_VERSIONS" env-delim:" "`
 
 	// Timeouts
-	PingTimeoutMs     int64 `long:"ping-timeout-ms" description:"The timeout in milliseconds for a ping call to other goldpinger pods" env:"PING_TIMEOUT_MS" default:"300"`
-	CheckTimeoutMs    int64 `long:"check-timeout-ms" description:"The timeout in milliseconds for a check call to other goldpinger pods" env:"CHECK_TIMEOUT_MS" default:"1000"`
-	CheckAllTimeoutMs int64 `long:"check-all-timeout-ms" description:"The timeout in milliseconds for a check-all call to other goldpinger pods" env:"CHECK_ALL_TIMEOUT_MS" default:"5000"`
+	PingTimeoutMs     int64         `long:"ping-timeout-ms" description:"The timeout in milliseconds for a ping call to other goldpinger pods(deprecated)" env:"PING_TIMEOUT_MS" default:"300"`
+	CheckTimeoutMs    int64         `long:"check-timeout-ms" description:"The timeout in milliseconds for a check call to other goldpinger pods(deprecated)" env:"CHECK_TIMEOUT_MS" default:"1000"`
+	CheckAllTimeoutMs int64         `long:"check-all-timeout-ms" description:"The timeout in milliseconds for a check-all call to other goldpinger pods(deprecated)" env:"CHECK_ALL_TIMEOUT_MS" default:"5000"`
+	PingTimeout       time.Duration `long:"ping-timeout" description:"The timeout for a ping call to other goldpinger pods" env:"PING_TIMEOUT" default:"300ms"`
+	CheckTimeout      time.Duration `long:"check-timeout" description:"The timeout for a check call to other goldpinger pods" env:"CHECK_TIMEOUT" default:"1000ms"`
+	CheckAllTimeout   time.Duration `long:"check-all-timeout" description:"The timeout for a check-all call to other goldpinger pods" env:"CHECK_ALL_TIMEOUT" default:"5000ms"`
+	TCPCheckTimeout   time.Duration `long:"tcp-targets-timeout" description:"The timeout for a tcp check on the provided tcp-targets" env:"TCP_TARGETS_TIMEOUT" default:"500ms"`
+	DnsCheckTimeout   time.Duration `long:"dns-targets-timeout" description:"The timeout for a dns check on the provided dns-targets" env:"DNS_TARGETS_TIMEOUT" default:"500ms"`
+	HTTPCheckTimeout  time.Duration `long:"http-targets-timeout" description:"The timeout for a http check on the provided http-targets" env:"HTTP_TARGETS_TIMEOUT" default:"500ms"`
 }{}

pkg/goldpinger/heatmap.go

@@ -26,7 +26,6 @@ import (
 	"net/http"
 	"sort"
 	"strconv"
-	"time"
 
 	"go.uber.org/zap"
 	"golang.org/x/image/font"
@@ -83,7 +82,7 @@ func HeatmapHandler(w http.ResponseWriter, r *http.Request) {
 
 	ctx, cancel := context.WithTimeout(
 		r.Context(),
-		time.Duration(GoldpingerConfig.CheckAllTimeoutMs)*time.Millisecond,
+		GoldpingerConfig.CheckAllTimeout,
 	)
 	defer cancel()
 

pkg/goldpinger/k8s.go

@@ -69,7 +69,8 @@ func getHostIP(p v1.Pod) string {
 
 	var hostIP string
 	for _, addr := range node.Status.Addresses {
-		if ipMatchesConfig(addr.Address) {
+		if (addr.Type == v1.NodeInternalIP || addr.Type == v1.NodeExternalIP) &&
+			ipMatchesConfig(addr.Address) {
 			hostIP = addr.Address
 		}
 	}

pkg/goldpinger/pinger.go

@@ -46,7 +46,7 @@ type Pinger struct {
 func NewPinger(pod *GoldpingerPod, resultsChan chan<- PingAllPodsResult) *Pinger {
 	p := Pinger{
 		pod:         pod,
-		timeout:     time.Duration(GoldpingerConfig.PingTimeoutMs) * time.Millisecond,
+		timeout:     GoldpingerConfig.PingTimeout,
 		resultsChan: resultsChan,
 		stopChan:    make(chan struct{}),
 

pkg/goldpinger/probes.go

@@ -0,0 +1,72 @@
+// Copyright 2018 Bloomberg Finance L.P.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package goldpinger
+
+import (
+	"context"
+	"crypto/tls"
+	"fmt"
+	"net"
+	"net/http"
+	"net/url"
+	"time"
+)
+
+func doDNSProbe(addr string, timeout time.Duration) error {
+	resolver := net.Resolver{}
+	ctx, cancel := context.WithTimeout(context.Background(), timeout)
+	defer cancel()
+	ips, err := resolver.LookupHost(ctx, addr)
+	if len(ips) == 0 {
+		return fmt.Errorf("%s was resolved to 0 ips", addr)
+	}
+	return err
+}
+
+func doTCPProbe(addr string, timeout time.Duration) error {
+	conn, err := net.DialTimeout("tcp", addr, timeout)
+	if conn != nil {
+		defer conn.Close()
+	}
+	return err
+}
+
+func doHTTPProbe(addr string, timeout time.Duration) error {
+	client := http.Client{Timeout: timeout}
+	u, err := url.Parse(addr)
+	if err != nil {
+		return err
+	}
+	if u.Scheme != "http" && u.Scheme != "https" {
+		return fmt.Errorf("invalid url scheme: '%s' in address", u.Scheme)
+	}
+	if u.Scheme == "https" {
+		client.Transport = &http.Transport{
+			TLSClientConfig: &tls.Config{
+				InsecureSkipVerify: true,
+			},
+		}
+	}
+	resp, err := client.Get(addr)
+	if err != nil {
+		return err
+	}
+
+	defer resp.Body.Close()
+	if resp.StatusCode != 200 {
+		return fmt.Errorf("%s returned non-200 resp: %d", addr, resp.StatusCode)
+	}
+	return err
+}

pkg/goldpinger/stats.go

@@ -103,7 +103,26 @@ var (
 			"host",
 		},
 	)
-
+	goldPingerTcpErrorsCounter = prometheus.NewCounterVec(
+		prometheus.CounterOpts{
+			Name: "goldpinger_tcp_errors_total",
+			Help: "Statistics of TCP probe errors per instance",
+		},
+		[]string{
+			"goldpinger_instance",
+			"host",
+		},
+	)
+	goldPingerHttpErrorsCounter = prometheus.NewCounterVec(
+		prometheus.CounterOpts{
+			Name: "goldpinger_http_errors_total",
+			Help: "Statistics of HTTP probe errors per instance",
+		},
+		[]string{
+			"goldpinger_instance",
+			"host",
+		},
+	)
 	bootTime = time.Now()
 )
 
@@ -115,6 +134,8 @@ func init() {
 	prometheus.MustRegister(goldpingerResponseTimeKubernetesHistogram)
 	prometheus.MustRegister(goldpingerErrorsCounter)
 	prometheus.MustRegister(goldpingerDnsErrorsCounter)
+	prometheus.MustRegister(goldPingerHttpErrorsCounter)
+	prometheus.MustRegister(goldPingerTcpErrorsCounter)
 	zap.L().Info("Metrics setup - see /metrics")
 }
 
@@ -173,6 +194,22 @@ func CountDnsError(host string) {
 	).Inc()
 }
 
+// CountTcpError counts instances of tcp errors for prober
+func CountTcpError(host string) {
+	goldPingerTcpErrorsCounter.WithLabelValues(
+		GoldpingerConfig.Hostname,
+		host,
+	).Inc()
+}
+
+// CountHttpError counts instances of tcp errors for prober
+func CountHttpError(host string) {
+	goldPingerHttpErrorsCounter.WithLabelValues(
+		GoldpingerConfig.Hostname,
+		host,
+	).Inc()
+}
+
 // returns a timer for easy observing of the durations of calls to kubernetes API
 func GetLabeledKubernetesCallsTimer() *prometheus.Timer {
 	return prometheus.NewTimer(

pkg/goldpinger/updater.go

@@ -34,8 +34,8 @@ var checkResultsMux = sync.Mutex{}
 // - there is already a pinger with the same name
 // - the pinger has the same podIP
 // - the pinger has the same hostIP
-func exists(existingPods map[string]*GoldpingerPod, new *GoldpingerPod) bool {
-	old, exists := existingPods[new.Name]
+func exists(existingPods map[string]*GoldpingerPod, podName string, new *GoldpingerPod) bool {
+	old, exists := existingPods[podName]
 	return exists && (old.PodIP == new.PodIP) && (old.HostIP == new.HostIP)
 }
 
@@ -61,7 +61,7 @@ func updatePingers(resultsChan chan<- PingAllPodsResult) {
 
 		latest := SelectPods()
 		for podName, pod := range latest {
-			if exists(existingPods, pod) {
+			if exists(existingPods, podName, pod) {
 				// This pod continues to exist in the latest iteration of the update
 				// without any changes
 				// Delete it from the set of pods that we wish to delete
@@ -153,14 +153,17 @@ func updateCounters() {
 		}
 	}
 	CountHealthyUnhealthyNodes(counterHealthy, float64(len(checkResults.PodResults))-counterHealthy)
-	// check DNS, but don't block the access to checkResultsMux
+	// check external targets, don't block the access to checkResultsMux
 	nodesHealthy := int(counterHealthy) == len(checkResults.PodResults)
 	go func(healthySoFar bool) {
 		if healthySoFar {
-			for _, response := range *checkDNS() {
-				if response.Error != "" {
-					healthySoFar = false
-					break
+			probeResults := checkTargets()
+			for host := range probeResults {
+				for _, response := range probeResults[host] {
+					if response.Error != "" {
+						healthySoFar = false
+						break
+					}
 				}
 			}
 		}

pkg/models/check_all_pod_result.go

@@ -95,6 +95,8 @@ func (m *CheckAllPodResult) validateResponse(formats strfmt.Registry) error {
 		if err := m.Response.Validate(formats); err != nil {
 			if ve, ok := err.(*errors.Validation); ok {
 				return ve.ValidateName("response")
+			} else if ce, ok := err.(*errors.CompositeError); ok {
+				return ce.ValidateName("response")
 			}
 			return err
 		}
@@ -123,6 +125,8 @@ func (m *CheckAllPodResult) contextValidateResponse(ctx context.Context, formats
 		if err := m.Response.ContextValidate(ctx, formats); err != nil {
 			if ve, ok := err.(*errors.Validation); ok {
 				return ve.ValidateName("response")
+			} else if ce, ok := err.(*errors.CompositeError); ok {
+				return ce.ValidateName("response")
 			}
 			return err
 		}

pkg/models/check_all_results.go

@@ -23,9 +23,6 @@ type CheckAllResults struct {
 	// o k
 	OK *bool `json:"OK,omitempty"`
 
-	// dns results
-	DNSResults map[string]DNSResults `json:"dnsResults,omitempty"`
-
 	// hosts
 	Hosts []*CheckAllResultsHostsItems0 `json:"hosts"`
 
@@ -35,6 +32,9 @@ type CheckAllResults struct {
 	// hosts number
 	HostsNumber int32 `json:"hosts-number,omitempty"`
 
+	// probe results
+	ProbeResults map[string]ProbeResults `json:"probeResults,omitempty"`
+
 	// responses
 	Responses map[string]CheckAllPodResult `json:"responses,omitempty"`
 }
@@ -43,11 +43,11 @@ type CheckAllResults struct {
 func (m *CheckAllResults) Validate(formats strfmt.Registry) error {
 	var res []error
 
-	if err := m.validateDNSResults(formats); err != nil {
+	if err := m.validateHosts(formats); err != nil {
 		res = append(res, err)
 	}
 
-	if err := m.validateHosts(formats); err != nil {
+	if err := m.validateProbeResults(formats); err != nil {
 		res = append(res, err)
 	}
 
@@ -61,24 +61,6 @@ func (m *CheckAllResults) Validate(formats strfmt.Registry) error {
 	return nil
 }
 
-func (m *CheckAllResults) validateDNSResults(formats strfmt.Registry) error {
-	if swag.IsZero(m.DNSResults) { // not required
-		return nil
-	}
-
-	for k := range m.DNSResults {
-
-		if val, ok := m.DNSResults[k]; ok {
-			if err := val.Validate(formats); err != nil {
-				return err
-			}
-		}
-
-	}
-
-	return nil
-}
-
 func (m *CheckAllResults) validateHosts(formats strfmt.Registry) error {
 	if swag.IsZero(m.Hosts) { // not required
 		return nil
@@ -93,6 +75,8 @@ func (m *CheckAllResults) validateHosts(formats strfmt.Registry) error {
 			if err := m.Hosts[i].Validate(formats); err != nil {
 				if ve, ok := err.(*errors.Validation); ok {
 					return ve.ValidateName("hosts" + "." + strconv.Itoa(i))
+				} else if ce, ok := err.(*errors.CompositeError); ok {
+					return ce.ValidateName("hosts" + "." + strconv.Itoa(i))
 				}
 				return err
 			}
@@ -103,6 +87,24 @@ func (m *CheckAllResults) validateHosts(formats strfmt.Registry) error {
 	return nil
 }
 
+func (m *CheckAllResults) validateProbeResults(formats strfmt.Registry) error {
+	if swag.IsZero(m.ProbeResults) { // not required
+		return nil
+	}
+
+	for k := range m.ProbeResults {
+
+		if val, ok := m.ProbeResults[k]; ok {
+			if err := val.Validate(formats); err != nil {
+				return err
+			}
+		}
+
+	}
+
+	return nil
+}
+
 func (m *CheckAllResults) validateResponses(formats strfmt.Registry) error {
 	if swag.IsZero(m.Responses) { // not required
 		return nil
@@ -115,6 +117,11 @@ func (m *CheckAllResults) validateResponses(formats strfmt.Registry) error {
 		}
 		if val, ok := m.Responses[k]; ok {
 			if err := val.Validate(formats); err != nil {
+				if ve, ok := err.(*errors.Validation); ok {
+					return ve.ValidateName("responses" + "." + k)
+				} else if ce, ok := err.(*errors.CompositeError); ok {
+					return ce.ValidateName("responses" + "." + k)
+				}
 				return err
 			}
 		}
@@ -128,11 +135,11 @@ func (m *CheckAllResults) validateResponses(formats strfmt.Registry) error {
 func (m *CheckAllResults) ContextValidate(ctx context.Context, formats strfmt.Registry) error {
 	var res []error
 
-	if err := m.contextValidateDNSResults(ctx, formats); err != nil {
+	if err := m.contextValidateHosts(ctx, formats); err != nil {
 		res = append(res, err)
 	}
 
-	if err := m.contextValidateHosts(ctx, formats); err != nil {
+	if err := m.contextValidateProbeResults(ctx, formats); err != nil {
 		res = append(res, err)
 	}
 
@@ -146,12 +153,17 @@ func (m *CheckAllResults) ContextValidate(ctx context.Context, formats strfmt.Re
 	return nil
 }
 
-func (m *CheckAllResults) contextValidateDNSResults(ctx context.Context, formats strfmt.Registry) error {
+func (m *CheckAllResults) contextValidateHosts(ctx context.Context, formats strfmt.Registry) error {
 
-	for k := range m.DNSResults {
+	for i := 0; i < len(m.Hosts); i++ {
 
-		if val, ok := m.DNSResults[k]; ok {
-			if err := val.ContextValidate(ctx, formats); err != nil {
+		if m.Hosts[i] != nil {
+			if err := m.Hosts[i].ContextValidate(ctx, formats); err != nil {
+				if ve, ok := err.(*errors.Validation); ok {
+					return ve.ValidateName("hosts" + "." + strconv.Itoa(i))
+				} else if ce, ok := err.(*errors.CompositeError); ok {
+					return ce.ValidateName("hosts" + "." + strconv.Itoa(i))
+				}
 				return err
 			}
 		}
@@ -161,15 +173,12 @@ func (m *CheckAllResults) contextValidateDNSResults(ctx context.Context, formats
 	return nil
 }
 
-func (m *CheckAllResults) contextValidateHosts(ctx context.Context, formats strfmt.Registry) error {
+func (m *CheckAllResults) contextValidateProbeResults(ctx context.Context, formats strfmt.Registry) error {
 
-	for i := 0; i < len(m.Hosts); i++ {
+	for k := range m.ProbeResults {
 
-		if m.Hosts[i] != nil {
-			if err := m.Hosts[i].ContextValidate(ctx, formats); err != nil {
-				if ve, ok := err.(*errors.Validation); ok {
-					return ve.ValidateName("hosts" + "." + strconv.Itoa(i))
-				}
+		if val, ok := m.ProbeResults[k]; ok {
+			if err := val.ContextValidate(ctx, formats); err != nil {
 				return err
 			}
 		}

pkg/models/check_results.go

@@ -19,22 +19,22 @@ import (
 // swagger:model CheckResults
 type CheckResults struct {
 
-	// dns results
-	DNSResults DNSResults `json:"dnsResults,omitempty"`
-
 	// pod results
 	PodResults map[string]PodResult `json:"podResults,omitempty"`
+
+	// probe results
+	ProbeResults ProbeResults `json:"probeResults,omitempty"`
 }
 
 // Validate validates this check results
 func (m *CheckResults) Validate(formats strfmt.Registry) error {
 	var res []error
 
-	if err := m.validateDNSResults(formats); err != nil {
+	if err := m.validatePodResults(formats); err != nil {
 		res = append(res, err)
 	}
 
-	if err := m.validatePodResults(formats); err != nil {
+	if err := m.validateProbeResults(formats); err != nil {
 		res = append(res, err)
 	}
 
@@ -44,23 +44,6 @@ func (m *CheckResults) Validate(formats strfmt.Registry) error {
 	return nil
 }
 
-func (m *CheckResults) validateDNSResults(formats strfmt.Registry) error {
-	if swag.IsZero(m.DNSResults) { // not required
-		return nil
-	}
-
-	if m.DNSResults != nil {
-		if err := m.DNSResults.Validate(formats); err != nil {
-			if ve, ok := err.(*errors.Validation); ok {
-				return ve.ValidateName("dnsResults")
-			}
-			return err
-		}
-	}
-
-	return nil
-}
-
 func (m *CheckResults) validatePodResults(formats strfmt.Registry) error {
 	if swag.IsZero(m.PodResults) { // not required
 		return nil
@@ -73,6 +56,11 @@ func (m *CheckResults) validatePodResults(formats strfmt.Registry) error {
 		}
 		if val, ok := m.PodResults[k]; ok {
 			if err := val.Validate(formats); err != nil {
+				if ve, ok := err.(*errors.Validation); ok {
+					return ve.ValidateName("podResults" + "." + k)
+				} else if ce, ok := err.(*errors.CompositeError); ok {
+					return ce.ValidateName("podResults" + "." + k)
+				}
 				return err
 			}
 		}
@@ -82,15 +70,34 @@ func (m *CheckResults) validatePodResults(formats strfmt.Registry) error {
 	return nil
 }
 
+func (m *CheckResults) validateProbeResults(formats strfmt.Registry) error {
+	if swag.IsZero(m.ProbeResults) { // not required
+		return nil
+	}
+
+	if m.ProbeResults != nil {
+		if err := m.ProbeResults.Validate(formats); err != nil {
+			if ve, ok := err.(*errors.Validation); ok {
+				return ve.ValidateName("probeResults")
+			} else if ce, ok := err.(*errors.CompositeError); ok {
+				return ce.ValidateName("probeResults")
+			}
+			return err
+		}
+	}
+
+	return nil
+}
+
 // ContextValidate validate this check results based on the context it is used
 func (m *CheckResults) ContextValidate(ctx context.Context, formats strfmt.Registry) error {
 	var res []error
 
-	if err := m.contextValidateDNSResults(ctx, formats); err != nil {
+	if err := m.contextValidatePodResults(ctx, formats); err != nil {
 		res = append(res, err)
 	}
 
-	if err := m.contextValidatePodResults(ctx, formats); err != nil {
+	if err := m.contextValidateProbeResults(ctx, formats); err != nil {
 		res = append(res, err)
 	}
 
@@ -100,18 +107,6 @@ func (m *CheckResults) ContextValidate(ctx context.Context, formats strfmt.Regis
 	return nil
 }
 
-func (m *CheckResults) contextValidateDNSResults(ctx context.Context, formats strfmt.Registry) error {
-
-	if err := m.DNSResults.ContextValidate(ctx, formats); err != nil {
-		if ve, ok := err.(*errors.Validation); ok {
-			return ve.ValidateName("dnsResults")
-		}
-		return err
-	}
-
-	return nil
-}
-
 func (m *CheckResults) contextValidatePodResults(ctx context.Context, formats strfmt.Registry) error {
 
 	for k := range m.PodResults {
@@ -127,6 +122,20 @@ func (m *CheckResults) contextValidatePodResults(ctx context.Context, formats st
 	return nil
 }
 
+func (m *CheckResults) contextValidateProbeResults(ctx context.Context, formats strfmt.Registry) error {
+
+	if err := m.ProbeResults.ContextValidate(ctx, formats); err != nil {
+		if ve, ok := err.(*errors.Validation); ok {
+			return ve.ValidateName("probeResults")
+		} else if ce, ok := err.(*errors.CompositeError); ok {
+			return ce.ValidateName("probeResults")
+		}
+		return err
+	}
+
+	return nil
+}
+
 // MarshalBinary interface implementation
 func (m *CheckResults) MarshalBinary() ([]byte, error) {
 	if m == nil {

pkg/models/ping_results.go

@@ -66,6 +66,8 @@ func (m *PingResults) validateReceived(formats strfmt.Registry) error {
 		if err := m.Received.Validate(formats); err != nil {
 			if ve, ok := err.(*errors.Validation); ok {
 				return ve.ValidateName("received")
+			} else if ce, ok := err.(*errors.CompositeError); ok {
+				return ce.ValidateName("received")
 			}
 			return err
 		}
@@ -94,6 +96,8 @@ func (m *PingResults) contextValidateReceived(ctx context.Context, formats strfm
 		if err := m.Received.ContextValidate(ctx, formats); err != nil {
 			if ve, ok := err.(*errors.Validation); ok {
 				return ve.ValidateName("received")
+			} else if ce, ok := err.(*errors.CompositeError); ok {
+				return ce.ValidateName("received")
 			}
 			return err
 		}

pkg/models/pod_result.go

@@ -118,6 +118,8 @@ func (m *PodResult) validateResponse(formats strfmt.Registry) error {
 		if err := m.Response.Validate(formats); err != nil {
 			if ve, ok := err.(*errors.Validation); ok {
 				return ve.ValidateName("response")
+			} else if ce, ok := err.(*errors.CompositeError); ok {
+				return ce.ValidateName("response")
 			}
 			return err
 		}
@@ -146,6 +148,8 @@ func (m *PodResult) contextValidateResponse(ctx context.Context, formats strfmt.
 		if err := m.Response.ContextValidate(ctx, formats); err != nil {
 			if ve, ok := err.(*errors.Validation); ok {
 				return ve.ValidateName("response")
+			} else if ce, ok := err.(*errors.CompositeError); ok {
+				return ce.ValidateName("response")
 			}
 			return err
 		}

pkg/models/probe_result.go

@@ -0,0 +1,56 @@
+// Code generated by go-swagger; DO NOT EDIT.
+
+package models
+
+// This file was generated by the swagger tool.
+// Editing this file might prove futile when you re-run the swagger generate command
+
+import (
+	"context"
+
+	"github.com/go-openapi/strfmt"
+	"github.com/go-openapi/swag"
+)
+
+// ProbeResult probe result
+//
+// swagger:model ProbeResult
+type ProbeResult struct {
+
+	// error
+	Error string `json:"error,omitempty"`
+
+	// protocol
+	Protocol string `json:"protocol,omitempty"`
+
+	// response time ms
+	ResponseTimeMs int64 `json:"response-time-ms,omitempty"`
+}
+
+// Validate validates this probe result
+func (m *ProbeResult) Validate(formats strfmt.Registry) error {
+	return nil
+}
+
+// ContextValidate validates this probe result based on context it is used
+func (m *ProbeResult) ContextValidate(ctx context.Context, formats strfmt.Registry) error {
+	return nil
+}
+
+// MarshalBinary interface implementation
+func (m *ProbeResult) MarshalBinary() ([]byte, error) {
+	if m == nil {
+		return nil, nil
+	}
+	return swag.WriteJSON(m)
+}
+
+// UnmarshalBinary interface implementation
+func (m *ProbeResult) UnmarshalBinary(b []byte) error {
+	var res ProbeResult
+	if err := swag.ReadJSON(b, &res); err != nil {
+		return err
+	}
+	*m = res
+	return nil
+}

pkg/models/probe_results.go

@@ -0,0 +1,78 @@
+// Code generated by go-swagger; DO NOT EDIT.
+
+package models
+
+// This file was generated by the swagger tool.
+// Editing this file might prove futile when you re-run the swagger generate command
+
+import (
+	"context"
+	"strconv"
+
+	"github.com/go-openapi/errors"
+	"github.com/go-openapi/strfmt"
+	"github.com/go-openapi/validate"
+)
+
+// ProbeResults probe results
+//
+// swagger:model ProbeResults
+type ProbeResults map[string][]ProbeResult
+
+// Validate validates this probe results
+func (m ProbeResults) Validate(formats strfmt.Registry) error {
+	var res []error
+
+	for k := range m {
+
+		if err := validate.Required(k, "body", m[k]); err != nil {
+			return err
+		}
+
+		for i := 0; i < len(m[k]); i++ {
+
+			if err := m[k][i].Validate(formats); err != nil {
+				if ve, ok := err.(*errors.Validation); ok {
+					return ve.ValidateName(k + "." + strconv.Itoa(i))
+				} else if ce, ok := err.(*errors.CompositeError); ok {
+					return ce.ValidateName(k + "." + strconv.Itoa(i))
+				}
+				return err
+			}
+
+		}
+
+	}
+
+	if len(res) > 0 {
+		return errors.CompositeValidationError(res...)
+	}
+	return nil
+}
+
+// ContextValidate validate this probe results based on the context it is used
+func (m ProbeResults) ContextValidate(ctx context.Context, formats strfmt.Registry) error {
+	var res []error
+
+	for k := range m {
+
+		for i := 0; i < len(m[k]); i++ {
+
+			if err := m[k][i].ContextValidate(ctx, formats); err != nil {
+				if ve, ok := err.(*errors.Validation); ok {
+					return ve.ValidateName(k + "." + strconv.Itoa(i))
+				} else if ce, ok := err.(*errors.CompositeError); ok {
+					return ce.ValidateName(k + "." + strconv.Itoa(i))
+				}
+				return err
+			}
+
+		}
+
+	}
+
+	if len(res) > 0 {
+		return errors.CompositeValidationError(res...)
+	}
+	return nil
+}

pkg/restapi/configure_goldpinger.go

@@ -20,7 +20,6 @@ import (
 	"context"
 	"crypto/tls"
 	"net/http"
-	"time"
 
 	"strings"
 
@@ -61,7 +60,7 @@ func configureAPI(api *operations.GoldpingerAPI) http.Handler {
 
 			ctx, cancel := context.WithTimeout(
 				params.HTTPRequest.Context(),
-				time.Duration(goldpinger.GoldpingerConfig.PingTimeoutMs)*time.Millisecond,
+				goldpinger.GoldpingerConfig.PingTimeout,
 			)
 			defer cancel()
 
@@ -74,7 +73,7 @@ func configureAPI(api *operations.GoldpingerAPI) http.Handler {
 
 			ctx, cancel := context.WithTimeout(
 				params.HTTPRequest.Context(),
-				time.Duration(goldpinger.GoldpingerConfig.CheckTimeoutMs)*time.Millisecond,
+				goldpinger.GoldpingerConfig.CheckTimeout,
 			)
 			defer cancel()
 
@@ -87,7 +86,7 @@ func configureAPI(api *operations.GoldpingerAPI) http.Handler {
 
 			ctx, cancel := context.WithTimeout(
 				params.HTTPRequest.Context(),
-				time.Duration(goldpinger.GoldpingerConfig.CheckAllTimeoutMs)*time.Millisecond,
+				goldpinger.GoldpingerConfig.CheckAllTimeout,
 			)
 			defer cancel()
 
@@ -100,7 +99,7 @@ func configureAPI(api *operations.GoldpingerAPI) http.Handler {
 
 			ctx, cancel := context.WithTimeout(
 				params.HTTPRequest.Context(),
-				time.Duration(goldpinger.GoldpingerConfig.CheckAllTimeoutMs)*time.Millisecond,
+				goldpinger.GoldpingerConfig.CheckAllTimeout,
 			)
 			defer cancel()
 

pkg/restapi/embedded_spec.go

@@ -203,11 +203,23 @@ func init() {
           "type": "integer",
           "format": "int32"
         },
+        "httpResults": {
+          "type": "object",
+          "additionalProperties": {
+            "$ref": "#/definitions/HttpResults"
+          }
+        },
         "responses": {
           "type": "object",
           "additionalProperties": {
             "$ref": "#/definitions/CheckAllPodResult"
           }
+        },
+        "tcpResults": {
+          "type": "object",
+          "additionalProperties": {
+            "$ref": "#/definitions/TcpResults"
+          }
         }
       }
     },
@@ -217,11 +229,17 @@ func init() {
         "dnsResults": {
           "$ref": "#/definitions/DnsResults"
         },
+        "httpResults": {
+          "$ref": "#/definitions/HttpResults"
+        },
         "podResults": {
           "type": "object",
           "additionalProperties": {
             "$ref": "#/definitions/PodResult"
           }
+        },
+        "tcpResults": {
+          "$ref": "#/definitions/TcpResults"
         }
       }
     },
@@ -261,21 +279,10 @@ func init() {
         }
       }
     },
-    "DnsResult": {
-      "properties": {
-        "error": {
-          "type": "string"
-        },
-        "response-time-ms": {
-          "type": "number",
-          "format": "int64"
-        }
-      }
-    },
     "DnsResults": {
       "type": "object",
       "additionalProperties": {
-        "$ref": "#/definitions/DnsResult"
+        "$ref": "#/definitions/ProbeResult"
       }
     },
     "HealthCheckResults": {
@@ -295,6 +302,12 @@ func init() {
         }
       }
     },
+    "HttpResults": {
+      "type": "object",
+      "additionalProperties": {
+        "$ref": "#/definitions/ProbeResult"
+      }
+    },
     "PingResults": {
       "type": "object",
       "properties": {
@@ -342,6 +355,23 @@ func init() {
           "format": "int32"
         }
       }
+    },
+    "ProbeResult": {
+      "properties": {
+        "error": {
+          "type": "string"
+        },
+        "response-time-ms": {
+          "type": "number",
+          "format": "int64"
+        }
+      }
+    },
+    "TcpResults": {
+      "type": "object",
+      "additionalProperties": {
+        "$ref": "#/definitions/ProbeResult"
+      }
     }
   }
 }`))
@@ -518,11 +548,23 @@ func init() {
           "type": "integer",
           "format": "int32"
         },
+        "httpResults": {
+          "type": "object",
+          "additionalProperties": {
+            "$ref": "#/definitions/HttpResults"
+          }
+        },
         "responses": {
           "type": "object",
           "additionalProperties": {
             "$ref": "#/definitions/CheckAllPodResult"
           }
+        },
+        "tcpResults": {
+          "type": "object",
+          "additionalProperties": {
+            "$ref": "#/definitions/TcpResults"
+          }
         }
       }
     },
@@ -548,11 +590,17 @@ func init() {
         "dnsResults": {
           "$ref": "#/definitions/DnsResults"
         },
+        "httpResults": {
+          "$ref": "#/definitions/HttpResults"
+        },
         "podResults": {
           "type": "object",
           "additionalProperties": {
             "$ref": "#/definitions/PodResult"
           }
+        },
+        "tcpResults": {
+          "$ref": "#/definitions/TcpResults"
         }
       }
     },
@@ -592,21 +640,10 @@ func init() {
         }
       }
     },
-    "DnsResult": {
-      "properties": {
-        "error": {
-          "type": "string"
-        },
-        "response-time-ms": {
-          "type": "number",
-          "format": "int64"
-        }
-      }
-    },
     "DnsResults": {
       "type": "object",
       "additionalProperties": {
-        "$ref": "#/definitions/DnsResult"
+        "$ref": "#/definitions/ProbeResult"
       }
     },
     "HealthCheckResults": {
@@ -626,6 +663,12 @@ func init() {
         }
       }
     },
+    "HttpResults": {
+      "type": "object",
+      "additionalProperties": {
+        "$ref": "#/definitions/ProbeResult"
+      }
+    },
     "PingResults": {
       "type": "object",
       "properties": {
@@ -673,6 +716,23 @@ func init() {
           "format": "int32"
         }
       }
+    },
+    "ProbeResult": {
+      "properties": {
+        "error": {
+          "type": "string"
+        },
+        "response-time-ms": {
+          "type": "number",
+          "format": "int64"
+        }
+      }
+    },
+    "TcpResults": {
+      "type": "object",
+      "additionalProperties": {
+        "$ref": "#/definitions/ProbeResult"
+      }
     }
   }
 }`))

pkg/restapi/operations/check_all_pods.go

@@ -42,7 +42,7 @@ type CheckAllPods struct {
 func (o *CheckAllPods) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
 	route, rCtx, _ := o.Context.RouteInfo(r)
 	if rCtx != nil {
-		r = rCtx
+		*r = *rCtx
 	}
 	var Params = NewCheckAllPodsParams()
 	if err := o.Context.BindValidRequest(r, route, &Params); err != nil { // bind params

pkg/restapi/operations/check_service_pods.go

@@ -42,7 +42,7 @@ type CheckServicePods struct {
 func (o *CheckServicePods) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
 	route, rCtx, _ := o.Context.RouteInfo(r)
 	if rCtx != nil {
-		r = rCtx
+		*r = *rCtx
 	}
 	var Params = NewCheckServicePodsParams()
 	if err := o.Context.BindValidRequest(r, route, &Params); err != nil { // bind params

pkg/restapi/operations/cluster_health.go

@@ -42,7 +42,7 @@ type ClusterHealth struct {
 func (o *ClusterHealth) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
 	route, rCtx, _ := o.Context.RouteInfo(r)
 	if rCtx != nil {
-		r = rCtx
+		*r = *rCtx
 	}
 	var Params = NewClusterHealthParams()
 	if err := o.Context.BindValidRequest(r, route, &Params); err != nil { // bind params

pkg/restapi/operations/healthz.go

@@ -42,7 +42,7 @@ type Healthz struct {
 func (o *Healthz) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
 	route, rCtx, _ := o.Context.RouteInfo(r)
 	if rCtx != nil {
-		r = rCtx
+		*r = *rCtx
 	}
 	var Params = NewHealthzParams()
 	if err := o.Context.BindValidRequest(r, route, &Params); err != nil { // bind params

pkg/restapi/operations/ping.go

@@ -42,7 +42,7 @@ type Ping struct {
 func (o *Ping) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
 	route, rCtx, _ := o.Context.RouteInfo(r)
 	if rCtx != nil {
-		r = rCtx
+		*r = *rCtx
 	}
 	var Params = NewPingParams()
 	if err := o.Context.BindValidRequest(r, route, &Params); err != nil { // bind params

pkg/restapi/server.go

@@ -305,9 +305,6 @@ func (s *Server) Serve() (err error) {
 			s.Fatalf("no certificate was configured for TLS")
 		}
 
-		// must have at least one certificate or panics
-		httpsServer.TLSConfig.BuildNameToCertificate()
-
 		configureServer(httpsServer, "https", s.httpsServerL.Addr().String())
 
 		servers = append(servers, httpsServer)

static/index.html

@@ -213,6 +213,7 @@ var loadingDialog = function(enable){
 var global_data = undefined;
 var s; // the sigma graph
 
+
 var main = function(timeout){
 
         timeout = timeout || Number($("#timeout").val()) || 5.0;
@@ -229,7 +230,6 @@ var main = function(timeout){
 
                 // prepare nodes
                 var nodes = [];
-                var dnsCheckNodes = [];
                 var podIPs = [];
                 var resp = data.responses;
                 for (let podIP in resp) {
@@ -284,39 +284,44 @@ var main = function(timeout){
                         })
                 })
                 console.log(nodes);
-
-                if ('dnsResults' in data) {
-                    var yoffset = 0;
-                    for (let checkedHost in data.dnsResults) {
-                        let value = data.dnsResults[checkedHost];
-                        var allOk = true;
-                        for (let pod in value) {
-                            var podData = value[pod];
-                            var elapsed = 0;
-                            if ('response-time-ms' in podData) {
-                                elapsed = podData['response-time-ms'];
-                            }
-                            var podOk = (!('error' in podData));
-                            allOk = allOk && podOk
-                            edges.push({
-                                source: pod,
-                                target: checkedHost,
-                                _data: {
+                 
+                var probeResultsNodes = [];
+                if ('probeResults' in data) {
+                  var yoffset = 0;
+                  for (let checkedHost in data.probeResults) {
+                      let  value = data.probeResults[checkedHost];
+                      var allOk = true;
+                      for (let pod in value) {
+                          for (var i = 0; i < value[pod].length; i++){
+                                var elapsed = 0;
+                                var podData = value[pod][i];
+                                if ('response-time-ms' in podData) {
+                                        elapsed = podData['response-time-ms'];
+                                }
+                                var podOk = (!('error' in podData));
+                                allOk = allOk && podOk
+                                edges.push({
+                                  source: pod,
+                                  target: checkedHost,
+                                  _data: {
                                     "OK": podOk,
                                     "elapsed": elapsed,
-                                    "isDNSCheckNode": true,
-                                }
-                            });
+                                    "isprobeResultsNode": true,
+                                  }
+                                });              
+                          } 
                         }
+
                         value["OK"] = allOk
-                        dnsCheckNodes.push({
-                            "label": checkedHost,
-                            "id": checkedHost,
-                            "x": 0,
-                            "y": 0,
-                            _data: value,
-                        });
-                    }
+                        probeResultsNodes.push({
+                                "label": checkedHost,
+                                "id": checkedHost,
+                                "x": 0,
+                                "y": 0,
+                                _data: value,
+                         });
+           
+                  } 
                 }
 
                 // build the actual graph
@@ -351,7 +356,7 @@ var main = function(timeout){
                 });
 
                 // generate any dns nodes on the graph
-                dnsCheckNodes.forEach(function(node, i, a){
+                probeResultsNodes.forEach(function(node, i, a){
                         node.x = 2;
                         node.y = (0.6 * i / a.length) - 0.8;
                         node.size = 10;
@@ -359,7 +364,6 @@ var main = function(timeout){
                         if (!node._data.OK) {
                                 node.color = "red";
                         }
-                        //console.log(node);
                         s.graph.addNode(node);
                 });
 
@@ -374,7 +378,7 @@ var main = function(timeout){
                         if (!edge._data.OK) {
                                 color = "red";
                         }
-                        if ("isDNSCheckNode" in edge._data) {
+                        if ("isprobeResultsNode" in edge._data) {
                                 type = "dashed";
                         }
                         var edge = {

swagger.yml

@@ -12,17 +12,21 @@ definitions:
         type: integer
       ping:
         type: integer
-  DnsResult:
+  ProbeResult:
     properties:
       response-time-ms:
         type: number
         format: int64
       error:
         type: string
-  DnsResults:
+      protocol:
+        type: string
+  ProbeResults:
     type: object
     additionalProperties:
-      $ref: '#/definitions/DnsResult'
+      type: array
+      items:
+        $ref: '#/definitions/ProbeResult' 
   PingResults:
     type: object
     properties:
@@ -60,8 +64,8 @@ definitions:
   CheckResults:
     type: object
     properties:
-      dnsResults:
-        $ref: '#/definitions/DnsResults'
+      probeResults:
+        $ref: '#/definitions/ProbeResults'    
       podResults:
         type: object
         additionalProperties:
@@ -110,10 +114,10 @@ definitions:
             podIP:
               type: string
               format: ipv4
-      dnsResults:
+      probeResults:
         type: object
         additionalProperties:
-          $ref: '#/definitions/DnsResults'
+          $ref: '#/definitions/ProbeResults'       
       responses:
         type: object
         additionalProperties: