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6d68626125
This very simple tool dumps all samples in a LevelDB metrics storage together with their chunk information. This is very crude for now - I just whipped it up because I needed to debug something. We should add printf-style formatting support for it in the future to indicate what information to output for each sample in the database. We could also support inspecting the index databases.
115 lines
3.1 KiB
Go
115 lines
3.1 KiB
Go
// Copyright 2013 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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// Dumper is responsible for dumping all samples along with metadata contained
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// in a given Prometheus metrics storage. It prints samples in unquoted CSV
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// format, with commas as field separators:
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//
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// <fingerprint>,<chunk_first_time>,<chunk_last_time>,<chunk_sample_count>,<chunk_index>,<timestamp>,<value>
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package main
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import (
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"code.google.com/p/goprotobuf/proto"
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"encoding/csv"
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"flag"
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"fmt"
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"github.com/prometheus/prometheus/model"
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dto "github.com/prometheus/prometheus/model/generated"
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"github.com/prometheus/prometheus/storage"
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"github.com/prometheus/prometheus/storage/metric"
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"log"
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"os"
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"strconv"
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)
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var (
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storageRoot = flag.String("storage.root", "", "The path to the storage root for Prometheus.")
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)
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type SamplesDumper struct {
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*csv.Writer
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}
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func (d SamplesDumper) DecodeKey(in interface{}) (interface{}, error) {
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key := &dto.SampleKey{}
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err := proto.Unmarshal(in.([]byte), key)
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if err != nil {
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return nil, err
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}
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return model.NewSampleKeyFromDTO(key), nil
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}
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func (d SamplesDumper) DecodeValue(in interface{}) (interface{}, error) {
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values := &dto.SampleValueSeries{}
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err := proto.Unmarshal(in.([]byte), values)
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if err != nil {
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return nil, err
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}
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return model.NewValuesFromDTO(values), nil
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}
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func (d SamplesDumper) Filter(_, _ interface{}) storage.FilterResult {
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return storage.ACCEPT
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}
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func (d SamplesDumper) Operate(key, value interface{}) *storage.OperatorError {
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sampleKey := key.(model.SampleKey)
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for i, sample := range value.(model.Values) {
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d.Write([]string{
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sampleKey.Fingerprint.String(),
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strconv.FormatInt(sampleKey.FirstTimestamp.Unix(), 10),
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strconv.FormatInt(sampleKey.LastTimestamp.Unix(), 10),
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strconv.FormatUint(uint64(sampleKey.SampleCount), 10),
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strconv.Itoa(i),
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strconv.FormatInt(sample.Timestamp.Unix(), 10),
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fmt.Sprintf("%v", sample.Value),
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})
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if err := d.Error(); err != nil {
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return &storage.OperatorError{
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error: err,
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Continuable: false,
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}
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}
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}
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return nil
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}
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func main() {
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flag.Parse()
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if storageRoot == nil || *storageRoot == "" {
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log.Fatal("Must provide a path...")
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}
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persistence, err := metric.NewLevelDBMetricPersistence(*storageRoot)
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if err != nil {
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log.Fatal(err)
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}
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defer persistence.Close()
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dumper := SamplesDumper{csv.NewWriter(os.Stdout)}
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entire, err := persistence.MetricSamples.ForEach(dumper, dumper, dumper)
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if err != nil {
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log.Fatalf("Error dumping samples: %s", err)
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}
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if !entire {
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log.Fatalf("Didn't scan entire corpus")
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}
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dumper.Flush()
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if err = dumper.Error(); err != nil {
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log.Fatalf("Error flushing CSV: %s", err)
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}
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}
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