alertmanager/notify/notify_test.go
Simon Pasquier 9f7f4ead46
notify: don't use the global metrics registry (#1977)
* notify: don't use the global metrics registry

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

* Address Max's comment

Signed-off-by: Simon Pasquier <spasquie@redhat.com>
2019-08-26 16:37:13 +02:00

722 lines
18 KiB
Go

// Copyright 2015 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 notify
import (
"context"
"errors"
"fmt"
"io"
"reflect"
"testing"
"time"
"github.com/go-kit/kit/log"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/common/model"
"github.com/stretchr/testify/require"
"github.com/prometheus/alertmanager/nflog"
"github.com/prometheus/alertmanager/nflog/nflogpb"
"github.com/prometheus/alertmanager/silence"
"github.com/prometheus/alertmanager/silence/silencepb"
"github.com/prometheus/alertmanager/types"
)
type sendResolved bool
func (s sendResolved) SendResolved() bool {
return bool(s)
}
type notifierFunc func(ctx context.Context, alerts ...*types.Alert) (bool, error)
func (f notifierFunc) Notify(ctx context.Context, alerts ...*types.Alert) (bool, error) {
return f(ctx, alerts...)
}
type failStage struct{}
func (s failStage) Exec(ctx context.Context, l log.Logger, as ...*types.Alert) (context.Context, []*types.Alert, error) {
return ctx, nil, fmt.Errorf("some error")
}
type testNflog struct {
qres []*nflogpb.Entry
qerr error
logFunc func(r *nflogpb.Receiver, gkey string, firingAlerts, resolvedAlerts []uint64) error
}
func (l *testNflog) Query(p ...nflog.QueryParam) ([]*nflogpb.Entry, error) {
return l.qres, l.qerr
}
func (l *testNflog) Log(r *nflogpb.Receiver, gkey string, firingAlerts, resolvedAlerts []uint64) error {
return l.logFunc(r, gkey, firingAlerts, resolvedAlerts)
}
func (l *testNflog) GC() (int, error) {
return 0, nil
}
func (l *testNflog) Snapshot(w io.Writer) (int, error) {
return 0, nil
}
func alertHashSet(hashes ...uint64) map[uint64]struct{} {
res := map[uint64]struct{}{}
for _, h := range hashes {
res[h] = struct{}{}
}
return res
}
func TestDedupStageNeedsUpdate(t *testing.T) {
now := utcNow()
cases := []struct {
entry *nflogpb.Entry
firingAlerts map[uint64]struct{}
resolvedAlerts map[uint64]struct{}
repeat time.Duration
resolve bool
res bool
}{
{
// No matching nflog entry should update.
entry: nil,
firingAlerts: alertHashSet(2, 3, 4),
res: true,
}, {
// No matching nflog entry shouldn't update if no alert fires.
entry: nil,
resolvedAlerts: alertHashSet(2, 3, 4),
res: false,
}, {
// Different sets of firing alerts should update.
entry: &nflogpb.Entry{FiringAlerts: []uint64{1, 2, 3}},
firingAlerts: alertHashSet(2, 3, 4),
res: true,
}, {
// Zero timestamp in the nflog entry should always update.
entry: &nflogpb.Entry{
FiringAlerts: []uint64{1, 2, 3},
Timestamp: time.Time{},
},
firingAlerts: alertHashSet(1, 2, 3),
res: true,
}, {
// Identical sets of alerts shouldn't update before repeat_interval.
entry: &nflogpb.Entry{
FiringAlerts: []uint64{1, 2, 3},
Timestamp: now.Add(-9 * time.Minute),
},
repeat: 10 * time.Minute,
firingAlerts: alertHashSet(1, 2, 3),
res: false,
}, {
// Identical sets of alerts should update after repeat_interval.
entry: &nflogpb.Entry{
FiringAlerts: []uint64{1, 2, 3},
Timestamp: now.Add(-11 * time.Minute),
},
repeat: 10 * time.Minute,
firingAlerts: alertHashSet(1, 2, 3),
res: true,
}, {
// Different sets of resolved alerts without firing alerts shouldn't update after repeat_interval.
entry: &nflogpb.Entry{
ResolvedAlerts: []uint64{1, 2, 3},
Timestamp: now.Add(-11 * time.Minute),
},
repeat: 10 * time.Minute,
resolvedAlerts: alertHashSet(3, 4, 5),
resolve: true,
res: false,
}, {
// Different sets of resolved alerts shouldn't update when resolve is false.
entry: &nflogpb.Entry{
FiringAlerts: []uint64{1, 2},
ResolvedAlerts: []uint64{3},
Timestamp: now.Add(-9 * time.Minute),
},
repeat: 10 * time.Minute,
firingAlerts: alertHashSet(1),
resolvedAlerts: alertHashSet(2, 3),
resolve: false,
res: false,
}, {
// Different sets of resolved alerts should update when resolve is true.
entry: &nflogpb.Entry{
FiringAlerts: []uint64{1, 2},
ResolvedAlerts: []uint64{3},
Timestamp: now.Add(-9 * time.Minute),
},
repeat: 10 * time.Minute,
firingAlerts: alertHashSet(1),
resolvedAlerts: alertHashSet(2, 3),
resolve: true,
res: true,
}, {
// Empty set of firing alerts should update when resolve is false.
entry: &nflogpb.Entry{
FiringAlerts: []uint64{1, 2},
ResolvedAlerts: []uint64{3},
Timestamp: now.Add(-9 * time.Minute),
},
repeat: 10 * time.Minute,
firingAlerts: alertHashSet(),
resolvedAlerts: alertHashSet(1, 2, 3),
resolve: false,
res: true,
}, {
// Empty set of firing alerts should update when resolve is true.
entry: &nflogpb.Entry{
FiringAlerts: []uint64{1, 2},
ResolvedAlerts: []uint64{3},
Timestamp: now.Add(-9 * time.Minute),
},
repeat: 10 * time.Minute,
firingAlerts: alertHashSet(),
resolvedAlerts: alertHashSet(1, 2, 3),
resolve: true,
res: true,
},
}
for i, c := range cases {
t.Log("case", i)
s := &DedupStage{
now: func() time.Time { return now },
rs: sendResolved(c.resolve),
}
res := s.needsUpdate(c.entry, c.firingAlerts, c.resolvedAlerts, c.repeat)
require.Equal(t, c.res, res)
}
}
func TestDedupStage(t *testing.T) {
i := 0
now := utcNow()
s := &DedupStage{
hash: func(a *types.Alert) uint64 {
res := uint64(i)
i++
return res
},
now: func() time.Time {
return now
},
rs: sendResolved(false),
}
ctx := context.Background()
_, _, err := s.Exec(ctx, log.NewNopLogger())
require.EqualError(t, err, "group key missing")
ctx = WithGroupKey(ctx, "1")
_, _, err = s.Exec(ctx, log.NewNopLogger())
require.EqualError(t, err, "repeat interval missing")
ctx = WithRepeatInterval(ctx, time.Hour)
alerts := []*types.Alert{{}, {}, {}}
// Must catch notification log query errors.
s.nflog = &testNflog{
qerr: errors.New("bad things"),
}
ctx, _, err = s.Exec(ctx, log.NewNopLogger(), alerts...)
require.EqualError(t, err, "bad things")
// ... but skip ErrNotFound.
s.nflog = &testNflog{
qerr: nflog.ErrNotFound,
}
ctx, res, err := s.Exec(ctx, log.NewNopLogger(), alerts...)
require.NoError(t, err, "unexpected error on not found log entry")
require.Equal(t, alerts, res, "input alerts differ from result alerts")
s.nflog = &testNflog{
qerr: nil,
qres: []*nflogpb.Entry{
{FiringAlerts: []uint64{0, 1, 2}},
{FiringAlerts: []uint64{1, 2, 3}},
},
}
ctx, _, err = s.Exec(ctx, log.NewNopLogger(), alerts...)
require.Contains(t, err.Error(), "result size")
// Must return no error and no alerts no need to update.
i = 0
s.nflog = &testNflog{
qerr: nflog.ErrNotFound,
qres: []*nflogpb.Entry{
{
FiringAlerts: []uint64{0, 1, 2},
Timestamp: now,
},
},
}
ctx, res, err = s.Exec(ctx, log.NewNopLogger(), alerts...)
require.NoError(t, err)
require.Nil(t, res, "unexpected alerts returned")
// Must return no error and all input alerts on changes.
i = 0
s.nflog = &testNflog{
qerr: nil,
qres: []*nflogpb.Entry{
{
FiringAlerts: []uint64{1, 2, 3, 4},
Timestamp: now,
},
},
}
_, res, err = s.Exec(ctx, log.NewNopLogger(), alerts...)
require.NoError(t, err)
require.Equal(t, alerts, res, "unexpected alerts returned")
}
func TestMultiStage(t *testing.T) {
var (
alerts1 = []*types.Alert{{}}
alerts2 = []*types.Alert{{}, {}}
alerts3 = []*types.Alert{{}, {}, {}}
)
stage := MultiStage{
StageFunc(func(ctx context.Context, l log.Logger, alerts ...*types.Alert) (context.Context, []*types.Alert, error) {
if !reflect.DeepEqual(alerts, alerts1) {
t.Fatal("Input not equal to input of MultiStage")
}
ctx = context.WithValue(ctx, "key", "value")
return ctx, alerts2, nil
}),
StageFunc(func(ctx context.Context, l log.Logger, alerts ...*types.Alert) (context.Context, []*types.Alert, error) {
if !reflect.DeepEqual(alerts, alerts2) {
t.Fatal("Input not equal to output of previous stage")
}
v, ok := ctx.Value("key").(string)
if !ok || v != "value" {
t.Fatalf("Expected value %q for key %q but got %q", "value", "key", v)
}
return ctx, alerts3, nil
}),
}
_, alerts, err := stage.Exec(context.Background(), log.NewNopLogger(), alerts1...)
if err != nil {
t.Fatalf("Exec failed: %s", err)
}
if !reflect.DeepEqual(alerts, alerts3) {
t.Fatal("Output of MultiStage is not equal to the output of the last stage")
}
}
func TestMultiStageFailure(t *testing.T) {
var (
ctx = context.Background()
s1 = failStage{}
stage = MultiStage{s1}
)
_, _, err := stage.Exec(ctx, log.NewNopLogger(), nil)
if err.Error() != "some error" {
t.Fatal("Errors were not propagated correctly by MultiStage")
}
}
func TestRoutingStage(t *testing.T) {
var (
alerts1 = []*types.Alert{{}}
alerts2 = []*types.Alert{{}, {}}
)
stage := RoutingStage{
"name": StageFunc(func(ctx context.Context, l log.Logger, alerts ...*types.Alert) (context.Context, []*types.Alert, error) {
if !reflect.DeepEqual(alerts, alerts1) {
t.Fatal("Input not equal to input of RoutingStage")
}
return ctx, alerts2, nil
}),
"not": failStage{},
}
ctx := WithReceiverName(context.Background(), "name")
_, alerts, err := stage.Exec(ctx, log.NewNopLogger(), alerts1...)
if err != nil {
t.Fatalf("Exec failed: %s", err)
}
if !reflect.DeepEqual(alerts, alerts2) {
t.Fatal("Output of RoutingStage is not equal to the output of the inner stage")
}
}
func TestRetryStageWithError(t *testing.T) {
fail, retry := true, true
sent := []*types.Alert{}
i := Integration{
notifier: notifierFunc(func(ctx context.Context, alerts ...*types.Alert) (bool, error) {
if fail {
fail = false
return retry, errors.New("fail to deliver notification")
}
sent = append(sent, alerts...)
return false, nil
}),
rs: sendResolved(false),
}
r := RetryStage{
integration: i,
metrics: newMetrics(prometheus.NewRegistry()),
}
alerts := []*types.Alert{
&types.Alert{
Alert: model.Alert{
EndsAt: time.Now().Add(time.Hour),
},
},
}
ctx := context.Background()
ctx = WithFiringAlerts(ctx, []uint64{0})
// Notify with a recoverable error should retry and succeed.
resctx, res, err := r.Exec(ctx, log.NewNopLogger(), alerts...)
require.Nil(t, err)
require.Equal(t, alerts, res)
require.Equal(t, alerts, sent)
require.NotNil(t, resctx)
// Notify with an unrecoverable error should fail.
sent = sent[:0]
fail = true
retry = false
resctx, _, err = r.Exec(ctx, log.NewNopLogger(), alerts...)
require.NotNil(t, err)
require.NotNil(t, resctx)
}
func TestRetryStageNoResolved(t *testing.T) {
sent := []*types.Alert{}
i := Integration{
notifier: notifierFunc(func(ctx context.Context, alerts ...*types.Alert) (bool, error) {
sent = append(sent, alerts...)
return false, nil
}),
rs: sendResolved(false),
}
r := RetryStage{
integration: i,
metrics: newMetrics(prometheus.NewRegistry()),
}
alerts := []*types.Alert{
&types.Alert{
Alert: model.Alert{
EndsAt: time.Now().Add(-time.Hour),
},
},
&types.Alert{
Alert: model.Alert{
EndsAt: time.Now().Add(time.Hour),
},
},
}
ctx := context.Background()
resctx, res, err := r.Exec(ctx, log.NewNopLogger(), alerts...)
require.EqualError(t, err, "firing alerts missing")
require.Nil(t, res)
require.NotNil(t, resctx)
ctx = WithFiringAlerts(ctx, []uint64{0})
resctx, res, err = r.Exec(ctx, log.NewNopLogger(), alerts...)
require.Nil(t, err)
require.Equal(t, alerts, res)
require.Equal(t, []*types.Alert{alerts[1]}, sent)
require.NotNil(t, resctx)
// All alerts are resolved.
sent = sent[:0]
ctx = WithFiringAlerts(ctx, []uint64{})
alerts[1].Alert.EndsAt = time.Now().Add(-time.Hour)
resctx, res, err = r.Exec(ctx, log.NewNopLogger(), alerts...)
require.Nil(t, err)
require.Equal(t, alerts, res)
require.Equal(t, []*types.Alert{}, sent)
require.NotNil(t, resctx)
}
func TestRetryStageSendResolved(t *testing.T) {
sent := []*types.Alert{}
i := Integration{
notifier: notifierFunc(func(ctx context.Context, alerts ...*types.Alert) (bool, error) {
sent = append(sent, alerts...)
return false, nil
}),
rs: sendResolved(true),
}
r := RetryStage{
integration: i,
metrics: newMetrics(prometheus.NewRegistry()),
}
alerts := []*types.Alert{
&types.Alert{
Alert: model.Alert{
EndsAt: time.Now().Add(-time.Hour),
},
},
&types.Alert{
Alert: model.Alert{
EndsAt: time.Now().Add(time.Hour),
},
},
}
ctx := context.Background()
ctx = WithFiringAlerts(ctx, []uint64{0})
resctx, res, err := r.Exec(ctx, log.NewNopLogger(), alerts...)
require.Nil(t, err)
require.Equal(t, alerts, res)
require.Equal(t, alerts, sent)
require.NotNil(t, resctx)
// All alerts are resolved.
sent = sent[:0]
ctx = WithFiringAlerts(ctx, []uint64{})
alerts[1].Alert.EndsAt = time.Now().Add(-time.Hour)
resctx, res, err = r.Exec(ctx, log.NewNopLogger(), alerts...)
require.Nil(t, err)
require.Equal(t, alerts, res)
require.Equal(t, alerts, sent)
require.NotNil(t, resctx)
}
func TestSetNotifiesStage(t *testing.T) {
tnflog := &testNflog{}
s := &SetNotifiesStage{
recv: &nflogpb.Receiver{GroupName: "test"},
nflog: tnflog,
}
alerts := []*types.Alert{{}, {}, {}}
ctx := context.Background()
resctx, res, err := s.Exec(ctx, log.NewNopLogger(), alerts...)
require.EqualError(t, err, "group key missing")
require.Nil(t, res)
require.NotNil(t, resctx)
ctx = WithGroupKey(ctx, "1")
resctx, res, err = s.Exec(ctx, log.NewNopLogger(), alerts...)
require.EqualError(t, err, "firing alerts missing")
require.Nil(t, res)
require.NotNil(t, resctx)
ctx = WithFiringAlerts(ctx, []uint64{0, 1, 2})
resctx, res, err = s.Exec(ctx, log.NewNopLogger(), alerts...)
require.EqualError(t, err, "resolved alerts missing")
require.Nil(t, res)
require.NotNil(t, resctx)
ctx = WithResolvedAlerts(ctx, []uint64{})
tnflog.logFunc = func(r *nflogpb.Receiver, gkey string, firingAlerts, resolvedAlerts []uint64) error {
require.Equal(t, s.recv, r)
require.Equal(t, "1", gkey)
require.Equal(t, []uint64{0, 1, 2}, firingAlerts)
require.Equal(t, []uint64{}, resolvedAlerts)
return nil
}
resctx, res, err = s.Exec(ctx, log.NewNopLogger(), alerts...)
require.Nil(t, err)
require.Equal(t, alerts, res)
require.NotNil(t, resctx)
ctx = WithFiringAlerts(ctx, []uint64{})
ctx = WithResolvedAlerts(ctx, []uint64{0, 1, 2})
tnflog.logFunc = func(r *nflogpb.Receiver, gkey string, firingAlerts, resolvedAlerts []uint64) error {
require.Equal(t, s.recv, r)
require.Equal(t, "1", gkey)
require.Equal(t, []uint64{}, firingAlerts)
require.Equal(t, []uint64{0, 1, 2}, resolvedAlerts)
return nil
}
resctx, res, err = s.Exec(ctx, log.NewNopLogger(), alerts...)
require.Nil(t, err)
require.Equal(t, alerts, res)
require.NotNil(t, resctx)
}
func TestMuteStage(t *testing.T) {
// Mute all label sets that have a "mute" key.
muter := types.MuteFunc(func(lset model.LabelSet) bool {
_, ok := lset["mute"]
return ok
})
stage := NewMuteStage(muter)
in := []model.LabelSet{
{},
{"test": "set"},
{"mute": "me"},
{"foo": "bar", "test": "set"},
{"foo": "bar", "mute": "me"},
{},
{"not": "muted"},
}
out := []model.LabelSet{
{},
{"test": "set"},
{"foo": "bar", "test": "set"},
{},
{"not": "muted"},
}
var inAlerts []*types.Alert
for _, lset := range in {
inAlerts = append(inAlerts, &types.Alert{
Alert: model.Alert{Labels: lset},
})
}
_, alerts, err := stage.Exec(context.Background(), log.NewNopLogger(), inAlerts...)
if err != nil {
t.Fatalf("Exec failed: %s", err)
}
var got []model.LabelSet
for _, a := range alerts {
got = append(got, a.Labels)
}
if !reflect.DeepEqual(got, out) {
t.Fatalf("Muting failed, expected: %v\ngot %v", out, got)
}
}
func TestMuteStageWithSilences(t *testing.T) {
silences, err := silence.New(silence.Options{Retention: time.Hour})
if err != nil {
t.Fatal(err)
}
silID, err := silences.Set(&silencepb.Silence{
EndsAt: utcNow().Add(time.Hour),
Matchers: []*silencepb.Matcher{{Name: "mute", Pattern: "me"}},
})
if err != nil {
t.Fatal(err)
}
marker := types.NewMarker(prometheus.NewRegistry())
silencer := silence.NewSilencer(silences, marker, log.NewNopLogger())
stage := NewMuteStage(silencer)
in := []model.LabelSet{
{},
{"test": "set"},
{"mute": "me"},
{"foo": "bar", "test": "set"},
{"foo": "bar", "mute": "me"},
{},
{"not": "muted"},
}
out := []model.LabelSet{
{},
{"test": "set"},
{"foo": "bar", "test": "set"},
{},
{"not": "muted"},
}
var inAlerts []*types.Alert
for _, lset := range in {
inAlerts = append(inAlerts, &types.Alert{
Alert: model.Alert{Labels: lset},
})
}
// Set the second alert as previously silenced with an old version
// number. This is expected to get unsilenced by the stage.
marker.SetSilenced(inAlerts[1].Fingerprint(), 0, "123")
_, alerts, err := stage.Exec(context.Background(), log.NewNopLogger(), inAlerts...)
if err != nil {
t.Fatalf("Exec failed: %s", err)
}
var got []model.LabelSet
for _, a := range alerts {
got = append(got, a.Labels)
}
if !reflect.DeepEqual(got, out) {
t.Fatalf("Muting failed, expected: %v\ngot %v", out, got)
}
// Do it again to exercise the version tracking of silences.
_, alerts, err = stage.Exec(context.Background(), log.NewNopLogger(), inAlerts...)
if err != nil {
t.Fatalf("Exec failed: %s", err)
}
got = got[:0]
for _, a := range alerts {
got = append(got, a.Labels)
}
if !reflect.DeepEqual(got, out) {
t.Fatalf("Muting failed, expected: %v\ngot %v", out, got)
}
// Expire the silence and verify that no alerts are silenced now.
if err := silences.Expire(silID); err != nil {
t.Fatal(err)
}
_, alerts, err = stage.Exec(context.Background(), log.NewNopLogger(), inAlerts...)
if err != nil {
t.Fatalf("Exec failed: %s", err)
}
got = got[:0]
for _, a := range alerts {
got = append(got, a.Labels)
}
if !reflect.DeepEqual(got, in) {
t.Fatalf("Unmuting failed, expected: %v\ngot %v", in, got)
}
}