123 lines
3.1 KiB
Go
123 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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"encoding/csv"
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"flag"
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"fmt"
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"log"
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"os"
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"strconv"
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"code.google.com/p/goprotobuf/proto"
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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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)
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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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sampleKey := &metric.SampleKey{}
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sampleKey.Load(key)
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return sampleKey, 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 metric.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.(*metric.SampleKey)
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for i, sample := range value.(metric.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{
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csv.NewWriter(os.Stdout),
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}
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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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