128 lines
3.6 KiB
Go
128 lines
3.6 KiB
Go
// Copyright 2018 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 tsdb
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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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"github.com/stretchr/testify/require"
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"github.com/prometheus/prometheus/pkg/labels"
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"github.com/prometheus/prometheus/tsdb/chunks"
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"github.com/prometheus/prometheus/tsdb/fileutil"
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"github.com/prometheus/prometheus/tsdb/index"
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)
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func TestRepairBadIndexVersion(t *testing.T) {
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tmpDir, err := ioutil.TempDir("", "test")
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require.NoError(t, err)
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t.Cleanup(func() {
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require.NoError(t, os.RemoveAll(tmpDir))
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})
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// The broken index used in this test was written by the following script
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// at a broken revision.
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//
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// func main() {
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// w, err := index.NewWriter(indexFilename)
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// if err != nil {
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// panic(err)
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// }
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// err = w.AddSymbols(map[string]struct{}{
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// "a": struct{}{},
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// "b": struct{}{},
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// "1": struct{}{},
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// "2": struct{}{},
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// })
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// if err != nil {
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// panic(err)
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// }
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// err = w.AddSeries(1, labels.FromStrings("a", "1", "b", "1"))
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// if err != nil {
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// panic(err)
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// }
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// err = w.AddSeries(2, labels.FromStrings("a", "2", "b", "1"))
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// if err != nil {
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// panic(err)
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// }
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// err = w.WritePostings("b", "1", index.NewListPostings([]uint64{1, 2}))
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// if err != nil {
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// panic(err)
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// }
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// if err := w.Close(); err != nil {
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// panic(err)
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// }
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// }
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tmpDbDir := filepath.Join(tmpDir, "01BZJ9WJQPWHGNC2W4J9TA62KC")
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// Create a copy DB to run test against.
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require.NoError(t, fileutil.CopyDirs(filepath.Join("testdata", "repair_index_version", "01BZJ9WJQPWHGNC2W4J9TA62KC"), tmpDbDir))
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// Check the current db.
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// In its current state, lookups should fail with the fixed code.
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_, _, err = readMetaFile(tmpDbDir)
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require.Error(t, err)
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// Touch chunks dir in block to imitate them.
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require.NoError(t, os.MkdirAll(filepath.Join(tmpDbDir, "chunks"), 0777))
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// Read current index to check integrity.
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r, err := index.NewFileReader(filepath.Join(tmpDbDir, indexFilename))
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require.NoError(t, err)
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p, err := r.Postings("b", "1")
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require.NoError(t, err)
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for p.Next() {
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t.Logf("next ID %d", p.At())
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var lset labels.Labels
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require.Error(t, r.Series(p.At(), &lset, nil))
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}
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require.NoError(t, p.Err())
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require.NoError(t, r.Close())
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// On DB opening all blocks in the base dir should be repaired.
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db, err := Open(tmpDir, nil, nil, nil, nil)
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require.NoError(t, err)
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db.Close()
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r, err = index.NewFileReader(filepath.Join(tmpDbDir, indexFilename))
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require.NoError(t, err)
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defer r.Close()
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p, err = r.Postings("b", "1")
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require.NoError(t, err)
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res := []labels.Labels{}
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for p.Next() {
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t.Logf("next ID %d", p.At())
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var lset labels.Labels
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var chks []chunks.Meta
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require.NoError(t, r.Series(p.At(), &lset, &chks))
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res = append(res, lset)
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}
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require.NoError(t, p.Err())
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require.Equal(t, []labels.Labels{
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{{Name: "a", Value: "1"}, {Name: "b", Value: "1"}},
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{{Name: "a", Value: "2"}, {Name: "b", Value: "1"}},
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}, res)
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meta, _, err := readMetaFile(tmpDbDir)
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require.NoError(t, err)
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require.Equal(t, metaVersion1, meta.Version, "unexpected meta version %d", meta.Version)
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}
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