storage/remote: increase timeouts for Travis CI (#5224)

* storage/remote: adapt tests for Travis CI

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

* Check filesystems on Travis environment

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

* Run remote/storage tests on CircleCI for troubleshooting

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

* Try using tmpfs partition

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

* Revert "Try using tmpfs partition"

This reverts commit 85a30deb72.

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

* Don't store labels in writeToMock

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

* Fix data race

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

* Bump retries to 100 meaning that the total timeout is 10s

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

* clean up .travis.yml

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

* code fixup

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

* Remove unneeded empty line

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

.travis.yml

@@ -1,5 +1,3 @@
-sudo: false
-
 language: go
 
 # Whenever the Go version is updated here, .circleci/config.yml and .promu.yml

storage/remote/wal_watcher.go

@@ -276,7 +276,7 @@ func (w *WALWatcher) runWatcher() {
 	}
 }
 
-// Use tail true to indicate thatreader is currently on a segment that is
+// Use tail true to indicate that the reader is currently on a segment that is
 // actively being written to. If false, assume it's a full segment and we're
 // replaying it on start to cache the series records.
 func (w *WALWatcher) watch(wl *wal.WAL, reader *wal.LiveReader, tail bool) error {

storage/remote/wal_watcher_test.go

@@ -22,18 +22,33 @@ import (
 	"testing"
 	"time"
 
-	"github.com/prometheus/common/model"
 	"github.com/prometheus/prometheus/pkg/timestamp"
-	"github.com/prometheus/prometheus/prompb"
 	"github.com/prometheus/prometheus/util/testutil"
 	"github.com/prometheus/tsdb"
 	"github.com/prometheus/tsdb/labels"
 	"github.com/prometheus/tsdb/wal"
 )
 
+var defaultRetryInterval = 100 * time.Millisecond
+var defaultRetries = 100
+
+// retry executes f() n times at each interval until it returns true.
+func retry(t *testing.T, interval time.Duration, n int, f func() bool) {
+	t.Helper()
+	ticker := time.NewTicker(interval)
+	for i := 0; i <= n; i++ {
+		if f() {
+			return
+		}
+		t.Logf("retry %d/%d", i, n)
+		<-ticker.C
+	}
+	ticker.Stop()
+	t.Logf("function returned false")
+}
+
 type writeToMock struct {
 	samplesAppended      int
-	seriesLabels         map[uint64][]prompb.Label
 	seriesLock           sync.Mutex
 	seriesSegmentIndexes map[uint64]int
 }
@@ -44,20 +59,10 @@ func (wtm *writeToMock) Append(s []tsdb.RefSample) bool {
 }
 
 func (wtm *writeToMock) StoreSeries(series []tsdb.RefSeries, index int) {
-	temp := make(map[uint64][]prompb.Label, len(series))
-	for _, s := range series {
-		ls := make(model.LabelSet, len(s.Labels))
-		for _, label := range s.Labels {
-			ls[model.LabelName(label.Name)] = model.LabelValue(label.Value)
-		}
-
-		temp[s.Ref] = labelsetToLabelsProto(ls)
-	}
 	wtm.seriesLock.Lock()
 	defer wtm.seriesLock.Unlock()
-	for ref, labels := range temp {
-		wtm.seriesLabels[ref] = labels
-		wtm.seriesSegmentIndexes[ref] = index
+	for _, s := range series {
+		wtm.seriesSegmentIndexes[s.Ref] = index
 	}
 }
 
@@ -68,7 +73,6 @@ func (wtm *writeToMock) SeriesReset(index int) {
 	defer wtm.seriesLock.Unlock()
 	for k, v := range wtm.seriesSegmentIndexes {
 		if v < index {
-			delete(wtm.seriesLabels, k)
 			delete(wtm.seriesSegmentIndexes, k)
 		}
 	}
@@ -77,12 +81,11 @@ func (wtm *writeToMock) SeriesReset(index int) {
 func (wtm *writeToMock) checkNumLabels() int {
 	wtm.seriesLock.Lock()
 	defer wtm.seriesLock.Unlock()
-	return len(wtm.seriesLabels)
+	return len(wtm.seriesSegmentIndexes)
 }
 
 func newWriteToMock() *writeToMock {
 	return &writeToMock{
-		seriesLabels:         make(map[uint64][]prompb.Label),
 		seriesSegmentIndexes: make(map[uint64]int),
 	}
 }
@@ -141,21 +144,13 @@ func Test_readToEnd_noCheckpoint(t *testing.T) {
 	st := timestamp.FromTime(time.Now())
 	watcher := NewWALWatcher(nil, "", wt, dir, st)
 	go watcher.Start()
-	i := 0
-	ticker := time.NewTicker(100 * time.Millisecond)
-	for range ticker.C {
-		if wt.checkNumLabels() >= seriesCount*10*2 {
-			break
-		}
-		i++
-		if i >= 10 {
-			break
-		}
 
-	}
+	expected := seriesCount
+	retry(t, defaultRetryInterval, defaultRetries, func() bool {
+		return wt.checkNumLabels() >= expected
+	})
 	watcher.Stop()
-	ticker.Stop()
-	testutil.Equals(t, seriesCount, wt.checkNumLabels())
+	testutil.Equals(t, expected, wt.checkNumLabels())
 }
 
 func Test_readToEnd_withCheckpoint(t *testing.T) {
@@ -231,21 +226,13 @@ func Test_readToEnd_withCheckpoint(t *testing.T) {
 	st := timestamp.FromTime(time.Now())
 	watcher := NewWALWatcher(nil, "", wt, dir, st)
 	go watcher.Start()
-	i := 0
-	ticker := time.NewTicker(100 * time.Millisecond)
-	for range ticker.C {
-		if wt.checkNumLabels() >= seriesCount*10*2 {
-			break
-		}
-		i++
-		if i >= 20 {
-			break
-		}
 
-	}
+	expected := seriesCount * 10 * 2
+	retry(t, defaultRetryInterval, defaultRetries, func() bool {
+		return wt.checkNumLabels() >= expected
+	})
 	watcher.Stop()
-	ticker.Stop()
-	testutil.Equals(t, seriesCount*10*2, wt.checkNumLabels())
+	testutil.Equals(t, expected, wt.checkNumLabels())
 }
 
 func Test_readCheckpoint(t *testing.T) {
@@ -301,21 +288,13 @@ func Test_readCheckpoint(t *testing.T) {
 	st := timestamp.FromTime(time.Now())
 	watcher := NewWALWatcher(nil, "", wt, dir, st)
 	go watcher.Start()
-	i := 0
-	ticker := time.NewTicker(100 * time.Millisecond)
-	for range ticker.C {
-		if wt.checkNumLabels() >= seriesCount*10*2 {
-			break
-		}
-		i++
-		if i >= 8 {
-			break
-		}
 
-	}
+	expected := seriesCount * 10
+	retry(t, defaultRetryInterval, defaultRetries, func() bool {
+		return wt.checkNumLabels() >= expected
+	})
 	watcher.Stop()
-	ticker.Stop()
-	testutil.Equals(t, seriesCount*10, wt.checkNumLabels())
+	testutil.Equals(t, expected, wt.checkNumLabels())
 }
 
 func Test_checkpoint_seriesReset(t *testing.T) {
@@ -366,21 +345,12 @@ func Test_checkpoint_seriesReset(t *testing.T) {
 	st := timestamp.FromTime(time.Now())
 	watcher := NewWALWatcher(nil, "", wt, dir, st)
 	go watcher.Start()
-	i := 0
-	ticker := time.NewTicker(100 * time.Millisecond)
-	for range ticker.C {
-		if wt.checkNumLabels() >= seriesCount*10*2 {
-			break
-		}
 
-		i++
-		if i >= 50 {
-			break
-		}
-
-	}
+	expected := seriesCount * 10
+	retry(t, defaultRetryInterval, defaultRetries, func() bool {
+		return wt.checkNumLabels() >= expected
+	})
 	watcher.Stop()
-	ticker.Stop()
 	testutil.Equals(t, seriesCount*10, wt.checkNumLabels())
 
 	// If you modify the checkpoint and truncate segment #'s run the test to see how
@@ -411,7 +381,7 @@ func Test_decodeRecord(t *testing.T) {
 	watcher.decodeRecord(buf)
 	testutil.Ok(t, err)
 
-	testutil.Equals(t, 1, len(wt.seriesLabels))
+	testutil.Equals(t, 1, wt.checkNumLabels())
 
 	// decode a samples record
 	buf = enc.Samples([]tsdb.RefSample{tsdb.RefSample{Ref: 100, T: 1, V: 1.0}, tsdb.RefSample{Ref: 100, T: 2, V: 2.0}}, nil)
@@ -436,7 +406,7 @@ func Test_decodeRecord_afterStart(t *testing.T) {
 	watcher.decodeRecord(buf)
 	testutil.Ok(t, err)
 
-	testutil.Equals(t, 1, len(wt.seriesLabels))
+	testutil.Equals(t, 1, wt.checkNumLabels())
 
 	// decode a samples record
 	buf = enc.Samples([]tsdb.RefSample{tsdb.RefSample{Ref: 100, T: 1, V: 1.0}, tsdb.RefSample{Ref: 100, T: 2, V: 2.0}}, nil)