Fixed tutorial. (#1256)

Signed-off-by: bwplotka <bwplotka@gmail.com>

tutorial/whatsup/Makefile

@@ -1,4 +1,3 @@
-
 .PHONY: help
 help: ## Displays help.
 	@awk 'BEGIN {FS = ":.*##"; printf "\nUsage:\n  make \033[36m<target>\033[0m\n\nTargets:\n"} /^[a-z0-9A-Z_-]+:.*?##/ { printf "  \033[36m%-10s\033[0m %s\n", $$1, $$2 }' $(MAKEFILE_LIST)

tutorial/whatsup/internal/acceptance_test.go

@@ -27,7 +27,7 @@ import (
 )
 
 func TestAcceptance(t *testing.T) {
-	resp, err := http.Get(fmt.Sprintf("http://localhost:%v/metrics", WhatsupPort))
+	resp, err := http.Get(whatsupAddr(fmt.Sprintf("http://localhost:%v", WhatsupPort)) + "/metrics")
 	testutil.Ok(t, err)
 	defer resp.Body.Close()
 

tutorial/whatsup/internal/common.go

@@ -37,6 +37,13 @@ type Config struct {
 	TraceSamplingRatio float64 `yaml:"TraceSamplingRatio,omitempty"`
 }
 
+func whatsupAddr(defAddress string) string {
+	if a := os.Getenv("HOSTADDR"); a != "" {
+		return a + ":" + WhatsupPort
+	}
+	return defAddress
+}
+
 func ParseOptions(args []string) (Config, error) {
 	c := Config{}
 

tutorial/whatsup/internal/playground_test.go

@@ -19,6 +19,7 @@ package internal
 import (
 	"fmt"
 	"os"
+	"strings"
 	"testing"
 	"time"
 
@@ -71,18 +72,27 @@ func TestPlayground(t *testing.T) {
 	testutil.Ok(t, prom.SetConfig(prometheusConfig(map[string]string{
 		"prometheus": prom.InternalEndpoint("http"),
 		"jaeger":     jaeger.InternalEndpoint("http.metrics"),
-		"whatsup":    fmt.Sprintf("host.docker.internal:%v", WhatsupPort),
+		"whatsup":    whatsupAddr(fmt.Sprintf("host.docker.internal:%v", WhatsupPort)),
 	})))
 	// Due to VM based docker setups (e.g. MacOS), file sharing can be slower - do more sighups just in case (noops if all good)
 	prom.Exec(e2e.NewCommand("kill", "-SIGHUP", "1"))
 	prom.Exec(e2e.NewCommand("kill", "-SIGHUP", "1"))
 
 	// Best effort.
-	fmt.Println(e2einteractive.OpenInBrowser("http://" + jaeger.Endpoint("http.front")))
-	fmt.Println(e2einteractive.OpenInBrowser("http://" + prom.Endpoint("http")))
+	fmt.Println(e2einteractive.OpenInBrowser(convertToExternal("http://" + jaeger.Endpoint("http.front"))))
+	fmt.Println(e2einteractive.OpenInBrowser(convertToExternal("http://" + prom.Endpoint("http"))))
 	testutil.Ok(t, e2einteractive.RunUntilEndpointHitWithPort(19920))
 }
 
+func convertToExternal(endpoint string) string {
+	a := os.Getenv("HOSTADDR")
+	if a == "" {
+		return endpoint
+	}
+	// YOLO, fix and test.
+	return fmt.Sprintf("%v:%v", a, strings.Split(endpoint, ":")[2])
+}
+
 func prometheusConfig(jobToScrapeTargetAddress map[string]string) promconfig.Config {
 	h, _ := os.Hostname()
 	cfg := promconfig.Config{