685 lines
16 KiB
Go
685 lines
16 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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"bytes"
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"context"
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"encoding/json"
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"fmt"
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"io"
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"net/http"
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"net/http/httptest"
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"net/url"
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"strconv"
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"testing"
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"time"
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"github.com/prometheus/alertmanager/api/v2/models"
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config_util "github.com/prometheus/common/config"
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"github.com/prometheus/common/model"
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"github.com/stretchr/testify/require"
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"go.uber.org/atomic"
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yaml "gopkg.in/yaml.v2"
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"github.com/prometheus/prometheus/config"
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"github.com/prometheus/prometheus/discovery/targetgroup"
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"github.com/prometheus/prometheus/model/labels"
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"github.com/prometheus/prometheus/model/relabel"
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)
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func TestPostPath(t *testing.T) {
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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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require.Equal(t, c.out, postPath(c.in, config.AlertmanagerAPIVersionV1))
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}
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}
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func TestHandlerNextBatch(t *testing.T) {
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h := NewManager(&Options{}, nil)
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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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require.NoError(t, alertsEqual(expected[0:maxBatchSize], h.nextBatch()))
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require.NoError(t, alertsEqual(expected[maxBatchSize:2*maxBatchSize], h.nextBatch()))
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require.NoError(t, alertsEqual(expected[2*maxBatchSize:], h.nextBatch()))
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require.Equal(t, 0, len(h.queue), "Expected queue to be empty but got %d alerts", len(h.queue))
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}
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func alertsEqual(a, b []*Alert) error {
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if len(a) != len(b) {
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return fmt.Errorf("length mismatch: %v != %v", a, b)
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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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return fmt.Errorf("label mismatch at index %d: %s != %s", i, alert.Labels, b[i].Labels)
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}
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}
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return nil
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}
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func TestHandlerSendAll(t *testing.T) {
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var (
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errc = make(chan error, 1)
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expected = make([]*Alert, 0, maxBatchSize)
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status1, status2 atomic.Int32
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)
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status1.Store(int32(http.StatusOK))
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status2.Store(int32(http.StatusOK))
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newHTTPServer := func(u, p string, status *atomic.Int32) *httptest.Server {
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return httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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var err error
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defer func() {
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if err == nil {
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return
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}
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select {
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case errc <- err:
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default:
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}
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}()
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user, pass, _ := r.BasicAuth()
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if user != u || pass != p {
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err = fmt.Errorf("unexpected user/password: %s/%s != %s/%s", user, pass, u, p)
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w.WriteHeader(http.StatusInternalServerError)
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return
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}
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b, err := io.ReadAll(r.Body)
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if err != nil {
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err = fmt.Errorf("error reading body: %w", err)
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w.WriteHeader(http.StatusInternalServerError)
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return
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}
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var alerts []*Alert
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err = json.Unmarshal(b, &alerts)
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if err == nil {
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err = alertsEqual(expected, alerts)
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}
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w.WriteHeader(int(status.Load()))
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}))
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}
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server1 := newHTTPServer("prometheus", "testing_password", &status1)
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server2 := newHTTPServer("", "", &status2)
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defer server1.Close()
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defer server2.Close()
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h := NewManager(&Options{}, nil)
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authClient, _ := config_util.NewClientFromConfig(
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config_util.HTTPClientConfig{
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BasicAuth: &config_util.BasicAuth{
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Username: "prometheus",
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Password: "testing_password",
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},
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}, "auth_alertmanager")
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h.alertmanagers = make(map[string]*alertmanagerSet)
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am1Cfg := config.DefaultAlertmanagerConfig
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am1Cfg.Timeout = model.Duration(time.Second)
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am2Cfg := config.DefaultAlertmanagerConfig
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am2Cfg.Timeout = model.Duration(time.Second)
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h.alertmanagers["1"] = &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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},
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cfg: &am1Cfg,
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client: authClient,
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}
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h.alertmanagers["2"] = &alertmanagerSet{
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ams: []alertmanager{
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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: &am2Cfg,
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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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checkNoErr := func() {
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t.Helper()
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select {
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case err := <-errc:
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require.NoError(t, err)
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default:
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}
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}
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require.True(t, h.sendAll(h.queue...), "all sends failed unexpectedly")
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checkNoErr()
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status1.Store(int32(http.StatusNotFound))
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require.True(t, h.sendAll(h.queue...), "all sends failed unexpectedly")
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checkNoErr()
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status2.Store(int32(http.StatusInternalServerError))
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require.False(t, h.sendAll(h.queue...), "all sends succeeded unexpectedly")
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checkNoErr()
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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 := NewManager(&Options{
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Do: func(_ context.Context, client *http.Client, req *http.Request) (*http.Response, error) {
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received = true
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body, err := io.ReadAll(req.Body)
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require.NoError(t, err)
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require.Equal(t, testBody, string(body))
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require.Equal(t, testURL, req.URL.String())
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return &http.Response{
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Body: io.NopCloser(bytes.NewBuffer(nil)),
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}, nil
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},
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}, nil)
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h.sendOne(context.Background(), nil, testURL, []byte(testBody))
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require.True(t, received, "Expected to receive an alert, but didn't")
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}
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func TestExternalLabels(t *testing.T) {
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h := NewManager(&Options{
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QueueCapacity: 3 * maxBatchSize,
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ExternalLabels: labels.Labels{{Name: "a", Value: "b"}},
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RelabelConfigs: []*relabel.Config{
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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: relabel.MustNewRegexp("externalrelabelthis"),
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Replacement: "c",
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},
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},
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}, nil)
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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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require.NoError(t, alertsEqual(expected, h.queue))
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}
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func TestHandlerRelabel(t *testing.T) {
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h := NewManager(&Options{
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QueueCapacity: 3 * maxBatchSize,
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RelabelConfigs: []*relabel.Config{
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{
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SourceLabels: model.LabelNames{"alertname"},
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Action: "drop",
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Regex: relabel.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: relabel.MustNewRegexp("rename"),
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Replacement: "renamed",
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},
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},
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}, nil)
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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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require.NoError(t, alertsEqual(expected, h.queue))
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}
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func TestHandlerQueuing(t *testing.T) {
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var (
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expectedc = make(chan []*Alert)
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called = make(chan struct{})
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done = make(chan struct{})
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errc = make(chan error, 1)
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)
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server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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// Notify the test function that we have received something.
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select {
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case called <- struct{}{}:
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case <-done:
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return
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}
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// Wait for the test function to unblock us.
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select {
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case expected := <-expectedc:
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var alerts []*Alert
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b, err := io.ReadAll(r.Body)
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if err != nil {
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panic(err)
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}
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err = json.Unmarshal(b, &alerts)
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if err == nil {
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err = alertsEqual(expected, alerts)
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}
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select {
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case errc <- err:
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default:
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}
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case <-done:
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}
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}))
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defer func() {
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close(done)
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server.Close()
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}()
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h := NewManager(
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&Options{
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QueueCapacity: 3 * maxBatchSize,
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},
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nil,
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)
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h.alertmanagers = make(map[string]*alertmanagerSet)
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am1Cfg := config.DefaultAlertmanagerConfig
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am1Cfg.Timeout = model.Duration(time.Second)
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h.alertmanagers["1"] = &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: &am1Cfg,
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}
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go h.Run(nil)
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defer h.Stop()
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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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assertAlerts := func(expected []*Alert) {
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t.Helper()
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for {
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select {
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case <-called:
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expectedc <- expected
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case err := <-errc:
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require.NoError(t, err)
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return
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case <-time.After(5 * time.Second):
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require.FailNow(t, "Alerts were not pushed.")
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}
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}
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}
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// If the batch is larger than the queue capacity, it should be truncated
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// from the front.
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h.Send(alerts[:4*maxBatchSize]...)
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for i := 1; i < 4; i++ {
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assertAlerts(alerts[i*maxBatchSize : (i+1)*maxBatchSize])
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}
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// Send one batch, wait for it to arrive and block the server so the queue fills up.
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h.Send(alerts[:maxBatchSize]...)
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<-called
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// Send several batches while the server is still blocked so the queue
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// fills up to its maximum capacity (3*maxBatchSize). Then check that the
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// queue is truncated in the front.
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h.Send(alerts[1*maxBatchSize : 2*maxBatchSize]...) // this batch should be dropped.
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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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// Unblock the server.
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expectedc <- alerts[:maxBatchSize]
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select {
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case err := <-errc:
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require.NoError(t, err)
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case <-time.After(5 * time.Second):
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require.FailNow(t, "Alerts were not pushed.")
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}
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// Verify that we receive the last 3 batches.
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for i := 2; i < 5; i++ {
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assertAlerts(alerts[i*maxBatchSize : (i+1)*maxBatchSize])
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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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func TestLabelSetNotReused(t *testing.T) {
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tg := makeInputTargetGroup()
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_, _, err := AlertmanagerFromGroup(tg, &config.AlertmanagerConfig{})
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require.NoError(t, err)
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// Target modified during alertmanager extraction
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require.Equal(t, tg, makeInputTargetGroup())
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}
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func TestReload(t *testing.T) {
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tests := []struct {
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in *targetgroup.Group
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out string
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}{
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{
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in: &targetgroup.Group{
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Targets: []model.LabelSet{
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{
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"__address__": "alertmanager:9093",
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},
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},
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},
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out: "http://alertmanager:9093/api/v2/alerts",
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},
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}
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n := NewManager(&Options{}, nil)
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cfg := &config.Config{}
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s := `
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alerting:
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alertmanagers:
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- static_configs:
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`
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err := yaml.UnmarshalStrict([]byte(s), cfg)
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require.NoError(t, err, "Unable to load YAML config.")
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require.Equal(t, 1, len(cfg.AlertingConfig.AlertmanagerConfigs))
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err = n.ApplyConfig(cfg)
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require.NoError(t, err, "Error applying the config.")
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tgs := make(map[string][]*targetgroup.Group)
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for _, tt := range tests {
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for k := range cfg.AlertingConfig.AlertmanagerConfigs.ToMap() {
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tgs[k] = []*targetgroup.Group{
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tt.in,
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}
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break
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}
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n.reload(tgs)
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res := n.Alertmanagers()[0].String()
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require.Equal(t, tt.out, res)
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}
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}
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func TestDroppedAlertmanagers(t *testing.T) {
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tests := []struct {
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in *targetgroup.Group
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out string
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}{
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{
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in: &targetgroup.Group{
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Targets: []model.LabelSet{
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{
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"__address__": "alertmanager:9093",
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},
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},
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},
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out: "http://alertmanager:9093/api/v2/alerts",
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},
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}
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n := NewManager(&Options{}, nil)
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cfg := &config.Config{}
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s := `
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alerting:
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alertmanagers:
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- static_configs:
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relabel_configs:
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- source_labels: ['__address__']
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regex: 'alertmanager:9093'
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action: drop
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`
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err := yaml.UnmarshalStrict([]byte(s), cfg)
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require.NoError(t, err, "Unable to load YAML config.")
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require.Equal(t, 1, len(cfg.AlertingConfig.AlertmanagerConfigs))
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err = n.ApplyConfig(cfg)
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require.NoError(t, err, "Error applying the config.")
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tgs := make(map[string][]*targetgroup.Group)
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for _, tt := range tests {
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for k := range cfg.AlertingConfig.AlertmanagerConfigs.ToMap() {
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tgs[k] = []*targetgroup.Group{
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tt.in,
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}
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break
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}
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n.reload(tgs)
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res := n.DroppedAlertmanagers()[0].String()
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require.Equal(t, res, tt.out)
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}
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}
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func makeInputTargetGroup() *targetgroup.Group {
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return &targetgroup.Group{
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Targets: []model.LabelSet{
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{
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model.AddressLabel: model.LabelValue("1.1.1.1:9090"),
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model.LabelName("notcommon1"): model.LabelValue("label"),
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},
|
|
},
|
|
Labels: model.LabelSet{
|
|
model.LabelName("common"): model.LabelValue("label"),
|
|
},
|
|
Source: "testsource",
|
|
}
|
|
}
|
|
|
|
func TestLabelsToOpenAPILabelSet(t *testing.T) {
|
|
require.Equal(t, models.LabelSet{"aaa": "111", "bbb": "222"}, labelsToOpenAPILabelSet(labels.Labels{{Name: "aaa", Value: "111"}, {Name: "bbb", Value: "222"}}))
|
|
}
|
|
|
|
// TestHangingNotifier validates that targets updates happen even when there are
|
|
// queued alerts.
|
|
func TestHangingNotifier(t *testing.T) {
|
|
// Note: When targets are not updated in time, this test is flaky because go
|
|
// selects are not deterministic. Therefore we run 10 subtests to run into the issue.
|
|
for i := 0; i < 10; i++ {
|
|
t.Run(strconv.Itoa(i), func(t *testing.T) {
|
|
var (
|
|
done = make(chan struct{})
|
|
changed = make(chan struct{})
|
|
syncCh = make(chan map[string][]*targetgroup.Group)
|
|
)
|
|
|
|
defer func() {
|
|
close(done)
|
|
}()
|
|
|
|
// Setting up a bad server. This server hangs for 2 seconds.
|
|
badServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
|
select {
|
|
case <-done:
|
|
case <-time.After(2 * time.Second):
|
|
}
|
|
}))
|
|
badURL, err := url.Parse(badServer.URL)
|
|
require.NoError(t, err)
|
|
badAddress := badURL.Host // Used for __name__ label in targets.
|
|
|
|
// Setting up a bad server. This server returns fast, signaling requests on
|
|
// by closing the changed channel.
|
|
goodServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
|
close(changed)
|
|
}))
|
|
goodURL, err := url.Parse(goodServer.URL)
|
|
require.NoError(t, err)
|
|
goodAddress := goodURL.Host // Used for __name__ label in targets.
|
|
|
|
h := NewManager(
|
|
&Options{
|
|
QueueCapacity: 20 * maxBatchSize,
|
|
},
|
|
nil,
|
|
)
|
|
|
|
h.alertmanagers = make(map[string]*alertmanagerSet)
|
|
|
|
am1Cfg := config.DefaultAlertmanagerConfig
|
|
am1Cfg.Timeout = model.Duration(200 * time.Millisecond)
|
|
|
|
h.alertmanagers["config-0"] = &alertmanagerSet{
|
|
ams: []alertmanager{},
|
|
cfg: &am1Cfg,
|
|
metrics: h.metrics,
|
|
}
|
|
go h.Run(syncCh)
|
|
defer h.Stop()
|
|
|
|
var alerts []*Alert
|
|
for i := range make([]struct{}, 20*maxBatchSize) {
|
|
alerts = append(alerts, &Alert{
|
|
Labels: labels.FromStrings("alertname", fmt.Sprintf("%d", i)),
|
|
})
|
|
}
|
|
|
|
// Injecting the hanging server URL.
|
|
syncCh <- map[string][]*targetgroup.Group{
|
|
"config-0": {
|
|
{
|
|
Targets: []model.LabelSet{
|
|
{
|
|
model.AddressLabel: model.LabelValue(badAddress),
|
|
},
|
|
},
|
|
},
|
|
},
|
|
}
|
|
|
|
// Queing alerts.
|
|
h.Send(alerts...)
|
|
|
|
// Updating with a working alertmanager target.
|
|
go func() {
|
|
select {
|
|
case syncCh <- map[string][]*targetgroup.Group{
|
|
"config-0": {
|
|
{
|
|
Targets: []model.LabelSet{
|
|
{
|
|
model.AddressLabel: model.LabelValue(goodAddress),
|
|
},
|
|
},
|
|
},
|
|
},
|
|
}:
|
|
case <-done:
|
|
}
|
|
}()
|
|
|
|
select {
|
|
case <-time.After(300 * time.Millisecond):
|
|
t.Fatalf("Timeout after 300 milliseconds, targets not synced in time.")
|
|
case <-changed:
|
|
// The good server has been hit in less than 3 seconds, therefore
|
|
// targets have been updated before a second call could be made to the
|
|
// bad server.
|
|
}
|
|
})
|
|
}
|
|
}
|