test/with_api_v1: add test for route prefix

Signed-off-by: Simon Pasquier <spasquie@redhat.com>

test/with_api_v1/acceptance.go

@@ -50,6 +50,7 @@ type AcceptanceTest struct {
 
 // AcceptanceOpts defines configuration paramters for an acceptance test.
 type AcceptanceOpts struct {
+	RoutePrefix string
 	Tolerance   time.Duration
 	baseTime    time.Time
 }
@@ -135,7 +136,7 @@ func (t *AcceptanceTest) Alertmanager(conf string) *Alertmanager {
 	t.Logf("AM on %s", am.apiAddr)
 
 	c, err := api.NewClient(api.Config{
-		Address: fmt.Sprintf("http://%s", am.apiAddr),
+		Address: am.getURL(""),
 	})
 	if err != nil {
 		t.Fatal(err)
@@ -257,14 +258,18 @@ type Alertmanager struct {
 
 // Start the alertmanager and wait until it is ready to receive.
 func (am *Alertmanager) Start() {
-	cmd := exec.Command("../../../alertmanager",
+	args := []string{
 		"--config.file", am.confFile.Name(),
 		"--log.level", "debug",
 		"--web.listen-address", am.apiAddr,
 		"--storage.path", am.dir,
 		"--cluster.listen-address", am.clusterAddr,
 		"--cluster.settle-timeout", "0s",
-	)
+	}
+	if am.opts.RoutePrefix != "" {
+		args = append(args, "--web.route-prefix", am.opts.RoutePrefix)
+	}
+	cmd := exec.Command("../../../alertmanager", args...)
 
 	if am.cmd == nil {
 		var outb, errb buffer
@@ -288,17 +293,22 @@ func (am *Alertmanager) Start() {
 
 	time.Sleep(50 * time.Millisecond)
 	for i := 0; i < 10; i++ {
-		resp, err := http.Get(fmt.Sprintf("http://%s/status", am.apiAddr))
-		if err == nil {
-			_, err := ioutil.ReadAll(resp.Body)
+		resp, err := http.Get(am.getURL("/"))
+		if err != nil {
+			time.Sleep(500 * time.Millisecond)
+			continue
+		}
+		defer resp.Body.Close()
+		if resp.StatusCode != http.StatusOK {
+			am.t.Fatalf("Starting alertmanager failed: expected HTTP status '200', got '%d'", resp.StatusCode)
+		}
+		_, err = ioutil.ReadAll(resp.Body)
 		if err != nil {
 			am.t.Fatalf("Starting alertmanager failed: %s", err)
 		}
 		resp.Body.Close()
 		return
 	}
-		time.Sleep(500 * time.Millisecond)
-	}
 	am.t.Fatalf("Starting alertmanager failed: timeout")
 }
 
@@ -363,7 +373,7 @@ func (am *Alertmanager) SetSilence(at float64, sil *TestSilence) {
 			return
 		}
 
-		resp, err := http.Post(fmt.Sprintf("http://%s/api/v1/silences", am.apiAddr), "application/json", &buf)
+		resp, err := http.Post(am.getURL("/api/v1/silences"), "application/json", &buf)
 		if err != nil {
 			am.t.Errorf("Error setting silence %v: %s", sil, err)
 			return
@@ -392,7 +402,7 @@ func (am *Alertmanager) SetSilence(at float64, sil *TestSilence) {
 // DelSilence deletes the silence with the sid at the given time.
 func (am *Alertmanager) DelSilence(at float64, sil *TestSilence) {
 	am.t.Do(at, func() {
-		req, err := http.NewRequest("DELETE", fmt.Sprintf("http://%s/api/v1/silence/%s", am.apiAddr, sil.ID()), nil)
+		req, err := http.NewRequest("DELETE", am.getURL(fmt.Sprintf("/api/v1/silence/%s", sil.ID())), nil)
 		if err != nil {
 			am.t.Errorf("Error deleting silence %v: %s", sil, err)
 			return
@@ -418,3 +428,7 @@ func (am *Alertmanager) UpdateConfig(conf string) {
 		return
 	}
 }
+
+func (am *Alertmanager) getURL(path string) string {
+	return fmt.Sprintf("http://%s%s%s", am.apiAddr, am.opts.RoutePrefix, path)
+}

test/with_api_v1/acceptance/web_test.go

@@ -0,0 +1,42 @@
+// Copyright 2018 Prometheus Team
+// 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 test
+
+import (
+	"testing"
+
+	a "github.com/prometheus/alertmanager/test/with_api_v1"
+)
+
+func TestWebWithPrefix(t *testing.T) {
+	t.Parallel()
+
+	conf := `
+route:
+  receiver: "default"
+  group_by: []
+  group_wait:      1s
+  group_interval:  1s
+  repeat_interval: 1h
+
+receivers:
+- name: "default"
+`
+
+	// The test framework polls the API with the given prefix during
+	// Alertmanager startup and thereby ensures proper configuration.
+	at := a.NewAcceptanceTest(t, &a.AcceptanceOpts{RoutePrefix: "/foo"})
+	at.Alertmanager(conf)
+	at.Run()
+}