/
lazy_binary_reader_test.go
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/
lazy_binary_reader_test.go
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// Copyright (c) The Thanos Authors.
// Licensed under the Apache License 2.0.
package indexheader
import (
"context"
"io/ioutil"
"os"
"path/filepath"
"testing"
"time"
"github.com/go-kit/kit/log"
"github.com/oklog/ulid"
promtestutil "github.com/prometheus/client_golang/prometheus/testutil"
"github.com/prometheus/prometheus/pkg/labels"
"github.com/thanos-io/thanos/pkg/block"
"github.com/thanos-io/thanos/pkg/objstore/filesystem"
"github.com/thanos-io/thanos/pkg/testutil"
"github.com/thanos-io/thanos/pkg/testutil/e2eutil"
)
func TestNewLazyBinaryReader_ShouldFailIfUnableToBuildIndexHeader(t *testing.T) {
ctx := context.Background()
tmpDir, err := ioutil.TempDir("", "test-indexheader")
testutil.Ok(t, err)
defer func() { testutil.Ok(t, os.RemoveAll(tmpDir)) }()
bkt, err := filesystem.NewBucket(filepath.Join(tmpDir, "bkt"))
testutil.Ok(t, err)
defer func() { testutil.Ok(t, bkt.Close()) }()
_, err = NewLazyBinaryReader(ctx, log.NewNopLogger(), bkt, tmpDir, ulid.MustNew(0, nil), 3, NewLazyBinaryReaderMetrics(nil), nil)
testutil.NotOk(t, err)
}
func TestNewLazyBinaryReader_ShouldBuildIndexHeaderFromBucket(t *testing.T) {
ctx := context.Background()
tmpDir, err := ioutil.TempDir("", "test-indexheader")
testutil.Ok(t, err)
defer func() { testutil.Ok(t, os.RemoveAll(tmpDir)) }()
bkt, err := filesystem.NewBucket(filepath.Join(tmpDir, "bkt"))
testutil.Ok(t, err)
defer func() { testutil.Ok(t, bkt.Close()) }()
// Create block.
blockID, err := e2eutil.CreateBlock(ctx, tmpDir, []labels.Labels{
{{Name: "a", Value: "1"}},
{{Name: "a", Value: "2"}},
}, 100, 0, 1000, labels.Labels{{Name: "ext1", Value: "1"}}, 124)
testutil.Ok(t, err)
testutil.Ok(t, block.Upload(ctx, log.NewNopLogger(), bkt, filepath.Join(tmpDir, blockID.String())))
m := NewLazyBinaryReaderMetrics(nil)
r, err := NewLazyBinaryReader(ctx, log.NewNopLogger(), bkt, tmpDir, blockID, 3, m, nil)
testutil.Ok(t, err)
testutil.Assert(t, r.reader == nil)
testutil.Equals(t, float64(0), promtestutil.ToFloat64(m.loadCount))
testutil.Equals(t, float64(0), promtestutil.ToFloat64(m.unloadCount))
// Should lazy load the index upon first usage.
v, err := r.IndexVersion()
testutil.Ok(t, err)
testutil.Equals(t, 2, v)
testutil.Assert(t, r.reader != nil)
testutil.Equals(t, float64(1), promtestutil.ToFloat64(m.loadCount))
testutil.Equals(t, float64(0), promtestutil.ToFloat64(m.unloadCount))
labelNames, err := r.LabelNames()
testutil.Ok(t, err)
testutil.Equals(t, []string{"a"}, labelNames)
testutil.Equals(t, float64(1), promtestutil.ToFloat64(m.loadCount))
testutil.Equals(t, float64(0), promtestutil.ToFloat64(m.unloadCount))
}
func TestNewLazyBinaryReader_ShouldRebuildCorruptedIndexHeader(t *testing.T) {
ctx := context.Background()
tmpDir, err := ioutil.TempDir("", "test-indexheader")
testutil.Ok(t, err)
defer func() { testutil.Ok(t, os.RemoveAll(tmpDir)) }()
bkt, err := filesystem.NewBucket(filepath.Join(tmpDir, "bkt"))
testutil.Ok(t, err)
defer func() { testutil.Ok(t, bkt.Close()) }()
// Create block.
blockID, err := e2eutil.CreateBlock(ctx, tmpDir, []labels.Labels{
{{Name: "a", Value: "1"}},
{{Name: "a", Value: "2"}},
}, 100, 0, 1000, labels.Labels{{Name: "ext1", Value: "1"}}, 124)
testutil.Ok(t, err)
testutil.Ok(t, block.Upload(ctx, log.NewNopLogger(), bkt, filepath.Join(tmpDir, blockID.String())))
// Write a corrupted index-header for the block.
headerFilename := filepath.Join(tmpDir, blockID.String(), block.IndexHeaderFilename)
testutil.Ok(t, ioutil.WriteFile(headerFilename, []byte("xxx"), os.ModePerm))
m := NewLazyBinaryReaderMetrics(nil)
r, err := NewLazyBinaryReader(ctx, log.NewNopLogger(), bkt, tmpDir, blockID, 3, m, nil)
testutil.Ok(t, err)
testutil.Assert(t, r.reader == nil)
testutil.Equals(t, float64(0), promtestutil.ToFloat64(m.loadCount))
testutil.Equals(t, float64(0), promtestutil.ToFloat64(m.loadFailedCount))
testutil.Equals(t, float64(0), promtestutil.ToFloat64(m.unloadCount))
// Ensure it can read data.
labelNames, err := r.LabelNames()
testutil.Ok(t, err)
testutil.Equals(t, []string{"a"}, labelNames)
testutil.Equals(t, float64(1), promtestutil.ToFloat64(m.loadCount))
testutil.Equals(t, float64(0), promtestutil.ToFloat64(m.loadFailedCount))
testutil.Equals(t, float64(0), promtestutil.ToFloat64(m.unloadCount))
}
func TestLazyBinaryReader_ShouldReopenOnUsageAfterClose(t *testing.T) {
ctx := context.Background()
tmpDir, err := ioutil.TempDir("", "test-indexheader")
testutil.Ok(t, err)
defer func() { testutil.Ok(t, os.RemoveAll(tmpDir)) }()
bkt, err := filesystem.NewBucket(filepath.Join(tmpDir, "bkt"))
testutil.Ok(t, err)
defer func() { testutil.Ok(t, bkt.Close()) }()
// Create block.
blockID, err := e2eutil.CreateBlock(ctx, tmpDir, []labels.Labels{
{{Name: "a", Value: "1"}},
{{Name: "a", Value: "2"}},
}, 100, 0, 1000, labels.Labels{{Name: "ext1", Value: "1"}}, 124)
testutil.Ok(t, err)
testutil.Ok(t, block.Upload(ctx, log.NewNopLogger(), bkt, filepath.Join(tmpDir, blockID.String())))
m := NewLazyBinaryReaderMetrics(nil)
r, err := NewLazyBinaryReader(ctx, log.NewNopLogger(), bkt, tmpDir, blockID, 3, m, nil)
testutil.Ok(t, err)
testutil.Assert(t, r.reader == nil)
// Should lazy load the index upon first usage.
labelNames, err := r.LabelNames()
testutil.Ok(t, err)
testutil.Equals(t, []string{"a"}, labelNames)
testutil.Equals(t, float64(1), promtestutil.ToFloat64(m.loadCount))
testutil.Equals(t, float64(0), promtestutil.ToFloat64(m.loadFailedCount))
// Close it.
testutil.Ok(t, r.Close())
testutil.Assert(t, r.reader == nil)
testutil.Equals(t, float64(1), promtestutil.ToFloat64(m.unloadCount))
testutil.Equals(t, float64(0), promtestutil.ToFloat64(m.unloadFailedCount))
// Should lazy load again upon next usage.
labelNames, err = r.LabelNames()
testutil.Ok(t, err)
testutil.Equals(t, []string{"a"}, labelNames)
testutil.Equals(t, float64(2), promtestutil.ToFloat64(m.loadCount))
testutil.Equals(t, float64(0), promtestutil.ToFloat64(m.loadFailedCount))
// Closing an already closed lazy reader should be a no-op.
for i := 0; i < 2; i++ {
testutil.Ok(t, r.Close())
testutil.Equals(t, float64(2), promtestutil.ToFloat64(m.unloadCount))
testutil.Equals(t, float64(0), promtestutil.ToFloat64(m.unloadFailedCount))
}
}
func TestLazyBinaryReader_unload_ShouldReturnErrorIfNotIdle(t *testing.T) {
ctx := context.Background()
tmpDir, err := ioutil.TempDir("", "test-indexheader")
testutil.Ok(t, err)
defer func() { testutil.Ok(t, os.RemoveAll(tmpDir)) }()
bkt, err := filesystem.NewBucket(filepath.Join(tmpDir, "bkt"))
testutil.Ok(t, err)
defer func() { testutil.Ok(t, bkt.Close()) }()
// Create block.
blockID, err := e2eutil.CreateBlock(ctx, tmpDir, []labels.Labels{
{{Name: "a", Value: "1"}},
{{Name: "a", Value: "2"}},
}, 100, 0, 1000, labels.Labels{{Name: "ext1", Value: "1"}}, 124)
testutil.Ok(t, err)
testutil.Ok(t, block.Upload(ctx, log.NewNopLogger(), bkt, filepath.Join(tmpDir, blockID.String())))
m := NewLazyBinaryReaderMetrics(nil)
r, err := NewLazyBinaryReader(ctx, log.NewNopLogger(), bkt, tmpDir, blockID, 3, m, nil)
testutil.Ok(t, err)
testutil.Assert(t, r.reader == nil)
// Should lazy load the index upon first usage.
labelNames, err := r.LabelNames()
testutil.Ok(t, err)
testutil.Equals(t, []string{"a"}, labelNames)
testutil.Equals(t, float64(1), promtestutil.ToFloat64(m.loadCount))
testutil.Equals(t, float64(0), promtestutil.ToFloat64(m.loadFailedCount))
testutil.Equals(t, float64(0), promtestutil.ToFloat64(m.unloadCount))
testutil.Equals(t, float64(0), promtestutil.ToFloat64(m.unloadFailedCount))
// Try to unload but not idle since enough time.
testutil.Equals(t, errNotIdle, r.unloadIfIdleSince(time.Now().Add(-time.Minute).UnixNano()))
testutil.Equals(t, float64(1), promtestutil.ToFloat64(m.loadCount))
testutil.Equals(t, float64(0), promtestutil.ToFloat64(m.loadFailedCount))
testutil.Equals(t, float64(0), promtestutil.ToFloat64(m.unloadCount))
testutil.Equals(t, float64(0), promtestutil.ToFloat64(m.unloadFailedCount))
// Try to unload and idle since enough time.
testutil.Ok(t, r.unloadIfIdleSince(time.Now().UnixNano()))
testutil.Equals(t, float64(1), promtestutil.ToFloat64(m.loadCount))
testutil.Equals(t, float64(0), promtestutil.ToFloat64(m.loadFailedCount))
testutil.Equals(t, float64(1), promtestutil.ToFloat64(m.unloadCount))
testutil.Equals(t, float64(0), promtestutil.ToFloat64(m.unloadFailedCount))
}