mirror of
https://github.com/prometheus/prometheus.git
synced 2024-12-26 14:09:41 -08:00
399 lines
9.4 KiB
Go
399 lines
9.4 KiB
Go
// Copyright 2013 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package notifier
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import (
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"encoding/json"
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"fmt"
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"io/ioutil"
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"net/http"
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"net/http/httptest"
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"net/url"
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"testing"
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"time"
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"golang.org/x/net/context"
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"github.com/prometheus/common/model"
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"github.com/prometheus/prometheus/config"
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"github.com/prometheus/prometheus/pkg/labels"
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)
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func TestPostPath(t *testing.T) {
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var cases = []struct {
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in, out string
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}{
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{
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in: "",
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out: "/api/v1/alerts",
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},
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{
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in: "/",
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out: "/api/v1/alerts",
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},
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{
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in: "/prefix",
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out: "/prefix/api/v1/alerts",
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},
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{
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in: "/prefix//",
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out: "/prefix/api/v1/alerts",
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},
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{
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in: "prefix//",
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out: "/prefix/api/v1/alerts",
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},
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}
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for _, c := range cases {
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if res := postPath(c.in); res != c.out {
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t.Errorf("Expected post path %q for %q but got %q", c.out, c.in, res)
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}
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}
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}
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func TestHandlerNextBatch(t *testing.T) {
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h := New(&Options{})
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for i := range make([]struct{}, 2*maxBatchSize+1) {
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h.queue = append(h.queue, &Alert{
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Labels: labels.FromStrings("alertname", fmt.Sprintf("%d", i)),
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})
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}
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expected := append([]*Alert{}, h.queue...)
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b := h.nextBatch()
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if len(b) != maxBatchSize {
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t.Fatalf("Expected first batch of length %d, but got %d", maxBatchSize, len(b))
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}
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if !alertsEqual(expected[0:maxBatchSize], b) {
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t.Fatalf("First batch did not match")
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}
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b = h.nextBatch()
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if len(b) != maxBatchSize {
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t.Fatalf("Expected second batch of length %d, but got %d", maxBatchSize, len(b))
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}
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if !alertsEqual(expected[maxBatchSize:2*maxBatchSize], b) {
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t.Fatalf("Second batch did not match")
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}
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b = h.nextBatch()
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if len(b) != 1 {
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t.Fatalf("Expected third batch of length %d, but got %d", 1, len(b))
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}
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if !alertsEqual(expected[2*maxBatchSize:], b) {
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t.Fatalf("Third batch did not match")
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}
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if len(h.queue) != 0 {
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t.Fatalf("Expected queue to be empty but got %d alerts", len(h.queue))
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}
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}
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func alertsEqual(a, b []*Alert) bool {
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if len(a) != len(b) {
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fmt.Println("len mismatch")
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return false
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}
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for i, alert := range a {
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if !labels.Equal(alert.Labels, b[i].Labels) {
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fmt.Println("mismatch", alert.Labels, b[i].Labels)
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return false
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}
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}
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return true
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}
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func TestHandlerSendAll(t *testing.T) {
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var (
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expected []*Alert
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status1, status2 int
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)
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f := func(w http.ResponseWriter, r *http.Request) {
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defer r.Body.Close()
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var alerts []*Alert
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if err := json.NewDecoder(r.Body).Decode(&alerts); err != nil {
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t.Fatalf("Unexpected error on input decoding: %s", err)
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}
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if !alertsEqual(alerts, expected) {
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t.Errorf("%#v %#v", *alerts[0], *expected[0])
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t.Fatalf("Unexpected alerts received %v exp %v", alerts, expected)
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}
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}
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server1 := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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f(w, r)
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w.WriteHeader(status1)
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}))
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server2 := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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f(w, r)
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w.WriteHeader(status2)
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}))
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defer server1.Close()
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defer server2.Close()
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h := New(&Options{})
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h.alertmanagers = append(h.alertmanagers, &alertmanagerSet{
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ams: []alertmanager{
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alertmanagerMock{
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urlf: func() string { return server1.URL },
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},
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alertmanagerMock{
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urlf: func() string { return server2.URL },
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},
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},
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cfg: &config.AlertmanagerConfig{
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Timeout: time.Second,
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},
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})
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for i := range make([]struct{}, maxBatchSize) {
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h.queue = append(h.queue, &Alert{
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Labels: labels.FromStrings("alertname", fmt.Sprintf("%d", i)),
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})
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expected = append(expected, &Alert{
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Labels: labels.FromStrings("alertname", fmt.Sprintf("%d", i)),
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})
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}
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status1 = http.StatusOK
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status2 = http.StatusOK
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if !h.sendAll(h.queue...) {
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t.Fatalf("all sends failed unexpectedly")
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}
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status1 = http.StatusNotFound
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if !h.sendAll(h.queue...) {
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t.Fatalf("all sends failed unexpectedly")
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}
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status2 = http.StatusInternalServerError
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if h.sendAll(h.queue...) {
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t.Fatalf("all sends succeeded unexpectedly")
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}
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}
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func TestCustomDo(t *testing.T) {
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const testURL = "http://testurl.com/"
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const testBody = "testbody"
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var received bool
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h := New(&Options{
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Do: func(ctx context.Context, client *http.Client, req *http.Request) (*http.Response, error) {
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received = true
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body, err := ioutil.ReadAll(req.Body)
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if err != nil {
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t.Fatalf("Unable to read request body: %v", err)
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}
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if string(body) != testBody {
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t.Fatalf("Unexpected body; want %v, got %v", testBody, string(body))
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}
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if req.URL.String() != testURL {
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t.Fatalf("Unexpected URL; want %v, got %v", testURL, req.URL.String())
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}
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return &http.Response{
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Body: ioutil.NopCloser(nil),
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}, nil
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},
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})
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h.sendOne(context.Background(), nil, testURL, []byte(testBody))
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if !received {
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t.Fatal("Expected to receive an alert, but didn't")
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}
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}
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func TestExternalLabels(t *testing.T) {
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h := New(&Options{
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QueueCapacity: 3 * maxBatchSize,
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ExternalLabels: model.LabelSet{"a": "b"},
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RelabelConfigs: []*config.RelabelConfig{
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{
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SourceLabels: model.LabelNames{"alertname"},
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TargetLabel: "a",
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Action: "replace",
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Regex: config.MustNewRegexp("externalrelabelthis"),
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Replacement: "c",
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},
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},
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})
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// This alert should get the external label attached.
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h.Send(&Alert{
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Labels: labels.FromStrings("alertname", "test"),
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})
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// This alert should get the external label attached, but then set to "c"
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// through relabelling.
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h.Send(&Alert{
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Labels: labels.FromStrings("alertname", "externalrelabelthis"),
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})
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expected := []*Alert{
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{Labels: labels.FromStrings("alertname", "test", "a", "b")},
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{Labels: labels.FromStrings("alertname", "externalrelabelthis", "a", "c")},
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}
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if !alertsEqual(expected, h.queue) {
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t.Errorf("Expected alerts %v, got %v", expected, h.queue)
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}
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}
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func TestHandlerRelabel(t *testing.T) {
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h := New(&Options{
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QueueCapacity: 3 * maxBatchSize,
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RelabelConfigs: []*config.RelabelConfig{
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{
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SourceLabels: model.LabelNames{"alertname"},
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Action: "drop",
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Regex: config.MustNewRegexp("drop"),
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},
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{
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SourceLabels: model.LabelNames{"alertname"},
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TargetLabel: "alertname",
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Action: "replace",
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Regex: config.MustNewRegexp("rename"),
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Replacement: "renamed",
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},
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},
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})
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// This alert should be dropped due to the configuration
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h.Send(&Alert{
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Labels: labels.FromStrings("alertname", "drop"),
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})
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// This alert should be replaced due to the configuration
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h.Send(&Alert{
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Labels: labels.FromStrings("alertname", "rename"),
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})
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expected := []*Alert{
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{Labels: labels.FromStrings("alertname", "renamed")},
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}
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if !alertsEqual(expected, h.queue) {
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t.Errorf("Expected alerts %v, got %v", expected, h.queue)
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}
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}
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func TestHandlerQueueing(t *testing.T) {
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var (
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unblock = make(chan struct{})
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called = make(chan struct{})
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expected []*Alert
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)
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server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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called <- struct{}{}
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<-unblock
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defer r.Body.Close()
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var alerts []*Alert
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if err := json.NewDecoder(r.Body).Decode(&alerts); err != nil {
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t.Fatalf("Unexpected error on input decoding: %s", err)
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}
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if !alertsEqual(expected, alerts) {
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t.Errorf("Expected alerts %v, got %v", expected, alerts)
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}
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}))
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h := New(&Options{
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QueueCapacity: 3 * maxBatchSize,
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})
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h.alertmanagers = append(h.alertmanagers, &alertmanagerSet{
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ams: []alertmanager{
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alertmanagerMock{
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urlf: func() string { return server.URL },
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},
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},
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cfg: &config.AlertmanagerConfig{
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Timeout: time.Second,
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},
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})
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var alerts []*Alert
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for i := range make([]struct{}, 20*maxBatchSize) {
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alerts = append(alerts, &Alert{
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Labels: labels.FromStrings("alertname", fmt.Sprintf("%d", i)),
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})
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}
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go h.Run()
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defer h.Stop()
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h.Send(alerts[:4*maxBatchSize]...)
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// If the batch is larger than the queue size, the front should be truncated
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// from the front. Thus, we start at i=1.
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for i := 1; i < 4; i++ {
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select {
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case <-called:
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expected = alerts[i*maxBatchSize : (i+1)*maxBatchSize]
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unblock <- struct{}{}
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case <-time.After(5 * time.Second):
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t.Fatalf("Alerts were not pushed")
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}
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}
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// Send one batch, wait for it to arrive and block so the queue fills up.
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// Then check whether the queue is truncated in the front once its full.
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h.Send(alerts[:maxBatchSize]...)
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<-called
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// Fill the 3*maxBatchSize queue.
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h.Send(alerts[1*maxBatchSize : 2*maxBatchSize]...)
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h.Send(alerts[2*maxBatchSize : 3*maxBatchSize]...)
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h.Send(alerts[3*maxBatchSize : 4*maxBatchSize]...)
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// Send the batch that drops the first one.
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h.Send(alerts[4*maxBatchSize : 5*maxBatchSize]...)
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expected = alerts[:maxBatchSize]
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unblock <- struct{}{}
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for i := 2; i < 4; i++ {
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select {
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case <-called:
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expected = alerts[i*maxBatchSize : (i+1)*maxBatchSize]
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unblock <- struct{}{}
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case <-time.After(5 * time.Second):
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t.Fatalf("Alerts were not pushed")
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}
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}
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}
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type alertmanagerMock struct {
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urlf func() string
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}
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func (a alertmanagerMock) url() *url.URL {
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u, err := url.Parse(a.urlf())
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if err != nil {
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panic(err)
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}
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return u
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}
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