285 lines
8.1 KiB
Go
285 lines
8.1 KiB
Go
// Copyright 2016 Prometheus Team
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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 nflog
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import (
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"io/ioutil"
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"os"
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"path/filepath"
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"testing"
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"time"
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"github.com/golang/protobuf/ptypes"
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"github.com/golang/protobuf/ptypes/timestamp"
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pb "github.com/prometheus/alertmanager/nflog/nflogpb"
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"github.com/stretchr/testify/require"
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)
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func TestNlogGC(t *testing.T) {
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now := utcNow()
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// We only care about key names and expiration timestamps.
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newEntry := func(ts time.Time) *pb.MeshEntry {
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return &pb.MeshEntry{
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ExpiresAt: mustTimestampProto(ts),
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}
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}
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l := &nlog{
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st: gossipData{
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"a1": newEntry(now),
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"a2": newEntry(now.Add(time.Second)),
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"a3": newEntry(now.Add(-time.Second)),
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},
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now: func() time.Time { return now },
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metrics: newMetrics(nil),
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}
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n, err := l.GC()
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require.NoError(t, err, "unexpected error in garbage collection")
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require.Equal(t, 2, n, "unexpected number of removed entries")
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expected := gossipData{
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"a2": newEntry(now.Add(time.Second)),
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}
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require.Equal(t, l.st, expected, "unepexcted state after garbage collection")
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}
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func TestNlogSnapshot(t *testing.T) {
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// Check whether storing and loading the snapshot is symmetric.
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now := utcNow()
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cases := []struct {
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entries []*pb.MeshEntry
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}{
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{
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entries: []*pb.MeshEntry{
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{
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Entry: &pb.Entry{
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GroupKey: []byte("d8e8fca2dc0f896fd7cb4cb0031ba249"),
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Receiver: &pb.Receiver{GroupName: "abc", Integration: "test1", Idx: 1},
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GroupHash: []byte("126a8a51b9d1bbd07fddc65819a542c3"),
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Resolved: false,
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Timestamp: mustTimestampProto(now),
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},
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ExpiresAt: mustTimestampProto(now),
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}, {
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Entry: &pb.Entry{
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GroupKey: []byte("d8e8fca2dc0f8abce7cb4cb0031ba249"),
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Receiver: &pb.Receiver{GroupName: "def", Integration: "test2", Idx: 29},
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GroupHash: []byte("122c2331b9d1bbd07fddc65819a542c3"),
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Resolved: true,
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Timestamp: mustTimestampProto(now),
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},
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ExpiresAt: mustTimestampProto(now),
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}, {
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Entry: &pb.Entry{
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GroupKey: []byte("aaaaaca2dc0f896fd7cb4cb0031ba249"),
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Receiver: &pb.Receiver{GroupName: "ghi", Integration: "test3", Idx: 0},
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GroupHash: []byte("126a8a51b9d1bbd07fddc6e3e3e542c3"),
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Resolved: false,
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Timestamp: mustTimestampProto(now),
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},
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ExpiresAt: mustTimestampProto(now),
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},
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},
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},
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}
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for _, c := range cases {
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f, err := ioutil.TempFile("", "snapshot")
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require.NoError(t, err, "creating temp file failed")
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l1 := &nlog{
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st: gossipData{},
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metrics: newMetrics(nil),
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}
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// Setup internal state manually.
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for _, e := range c.entries {
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l1.st[stateKey(e.Entry.GroupKey, e.Entry.Receiver)] = e
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}
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_, err = l1.Snapshot(f)
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require.NoError(t, err, "creating snapshot failed")
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require.NoError(t, f.Close(), "closing snapshot file failed")
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f, err = os.Open(f.Name())
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require.NoError(t, err, "opening snapshot file failed")
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// Check again against new nlog instance.
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l2 := &nlog{}
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err = l2.loadSnapshot(f)
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require.NoError(t, err, "error loading snapshot")
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require.Equal(t, l1.st, l2.st, "state after loading snapshot did not match snapshotted state")
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require.NoError(t, f.Close(), "closing snapshot file failed")
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}
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}
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func TestReplaceFile(t *testing.T) {
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dir, err := ioutil.TempDir("", "replace_file")
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require.NoError(t, err, "creating temp dir failed")
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origFilename := filepath.Join(dir, "testfile")
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of, err := os.Create(origFilename)
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require.NoError(t, err, "creating file failed")
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nf, err := openReplace(origFilename)
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require.NoError(t, err, "opening replacement file failed")
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_, err = nf.Write([]byte("test"))
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require.NoError(t, err, "writing replace file failed")
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require.NotEqual(t, nf.Name(), of.Name(), "replacement file must have different name while editing")
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require.NoError(t, nf.Close(), "closing replacement file failed")
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require.NoError(t, of.Close(), "closing original file failed")
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ofr, err := os.Open(origFilename)
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require.NoError(t, err, "opening original file failed")
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defer ofr.Close()
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res, err := ioutil.ReadAll(ofr)
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require.NoError(t, err, "reading original file failed")
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require.Equal(t, "test", string(res), "unexpected file contents")
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}
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func TestGossipDataMerge(t *testing.T) {
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now := utcNow()
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// We only care about key names and timestamps for the
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// merging logic.
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newEntry := func(ts time.Time) *pb.MeshEntry {
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return &pb.MeshEntry{
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Entry: &pb.Entry{Timestamp: mustTimestampProto(ts)},
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}
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}
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cases := []struct {
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a, b gossipData
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final, delta gossipData
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}{
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{
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a: gossipData{
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"a1": newEntry(now),
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"a2": newEntry(now),
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"a3": newEntry(now),
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},
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b: gossipData{
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"b1": newEntry(now), // new key, should be added
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"a2": newEntry(now.Add(-time.Minute)), // older timestamp, should be dropped
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"a3": newEntry(now.Add(time.Minute)), // newer timestamp, should overwrite
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},
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final: gossipData{
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"a1": newEntry(now),
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"a2": newEntry(now),
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"a3": newEntry(now.Add(time.Minute)),
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"b1": newEntry(now),
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},
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delta: gossipData{
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"b1": newEntry(now),
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"a3": newEntry(now.Add(time.Minute)),
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},
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},
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}
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for _, c := range cases {
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ca, cb := c.a.clone(), c.b.clone()
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res := ca.Merge(cb)
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require.Equal(t, c.final, res, "Merge result should match expectation")
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require.Equal(t, c.final, ca, "Merge should apply changes to original state")
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require.Equal(t, c.b, cb, "Merged state should remain unmodified")
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ca, cb = c.a.clone(), c.b.clone()
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delta := ca.mergeDelta(cb)
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require.Equal(t, c.delta, delta, "Merge delta should match expectation")
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require.Equal(t, c.final, ca, "Merge should apply changes to original state")
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require.Equal(t, c.b, cb, "Merged state should remain unmodified")
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}
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}
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func TestGossipDataCoding(t *testing.T) {
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// Check whether encoding and decoding the data is symmetric.
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now := utcNow()
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cases := []struct {
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entries []*pb.MeshEntry
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}{
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{
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entries: []*pb.MeshEntry{
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{
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Entry: &pb.Entry{
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GroupKey: []byte("d8e8fca2dc0f896fd7cb4cb0031ba249"),
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Receiver: &pb.Receiver{GroupName: "abc", Integration: "test1", Idx: 1},
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GroupHash: []byte("126a8a51b9d1bbd07fddc65819a542c3"),
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Resolved: false,
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Timestamp: mustTimestampProto(now),
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},
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ExpiresAt: mustTimestampProto(now),
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}, {
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Entry: &pb.Entry{
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GroupKey: []byte("d8e8fca2dc0f8abce7cb4cb0031ba249"),
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Receiver: &pb.Receiver{GroupName: "def", Integration: "test2", Idx: 29},
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GroupHash: []byte("122c2331b9d1bbd07fddc65819a542c3"),
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Resolved: true,
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Timestamp: mustTimestampProto(now),
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},
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ExpiresAt: mustTimestampProto(now),
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}, {
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Entry: &pb.Entry{
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GroupKey: []byte("aaaaaca2dc0f896fd7cb4cb0031ba249"),
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Receiver: &pb.Receiver{GroupName: "ghi", Integration: "test3", Idx: 0},
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GroupHash: []byte("126a8a51b9d1bbd07fddc6e3e3e542c3"),
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Resolved: false,
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Timestamp: mustTimestampProto(now),
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},
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ExpiresAt: mustTimestampProto(now),
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},
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},
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},
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}
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for _, c := range cases {
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// Create gossip data from input.
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in := gossipData{}
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for _, e := range c.entries {
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in[stateKey(e.Entry.GroupKey, e.Entry.Receiver)] = e
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}
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msg := in.Encode()
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require.Equal(t, 1, len(msg), "expected single message for input")
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out, err := decodeGossipData(msg[0])
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require.NoError(t, err, "decoding message failed")
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require.Equal(t, in, out, "decoded data doesn't match encoded data")
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}
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}
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func mustTimestamp(ts *timestamp.Timestamp) time.Time {
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res, err := ptypes.Timestamp(ts)
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if err != nil {
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panic(err)
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}
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return res
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}
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func mustTimestampProto(ts time.Time) *timestamp.Timestamp {
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res, err := ptypes.TimestampProto(ts)
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if err != nil {
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panic(err)
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}
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return res
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}
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