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83 lines
2.2 KiB
83 lines
2.2 KiB
// Copyright 2019 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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"context" |
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"fmt" |
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"github.com/go-kit/kit/log" |
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"github.com/prometheus/prometheus/pkg/labels" |
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"os" |
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"path/filepath" |
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) |
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var InvalidTimesError = fmt.Errorf("max time is lesser than min time") |
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type MetricSample struct { |
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TimestampMs int64 |
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Value float64 |
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Labels labels.Labels |
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} |
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// CreateHead creates a TSDB writer head to write the sample data to. |
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func CreateHead(samples []*MetricSample, chunkRange int64, logger log.Logger) (*Head, error) { |
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head, err := NewHead(nil, logger, nil, chunkRange) |
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if err != nil { |
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return nil, err |
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} |
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app := head.Appender() |
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for _, sample := range samples { |
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_, err = app.Add(sample.Labels, sample.TimestampMs, sample.Value) |
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if err != nil { |
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return nil, err |
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} |
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} |
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err = app.Commit() |
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if err != nil { |
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return nil, err |
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} |
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return head, nil |
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} |
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// CreateBlock creates a chunkrange block from the samples passed to it, and writes it to disk. |
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func CreateBlock(samples []*MetricSample, dir string, mint, maxt int64, logger log.Logger) (string, error) { |
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chunkRange := maxt - mint |
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if chunkRange == 0 { |
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chunkRange = DefaultBlockDuration |
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} |
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if chunkRange < 0 { |
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return "", InvalidTimesError |
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} |
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head, err := CreateHead(samples, chunkRange, logger) |
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if err != nil { |
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return "", err |
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} |
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compactor, err := NewLeveledCompactor(context.Background(), nil, logger, DefaultOptions.BlockRanges, nil) |
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if err != nil { |
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return "", err |
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} |
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err = os.MkdirAll(dir, 0777) |
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if err != nil { |
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return "", err |
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} |
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ulid, err := compactor.Write(dir, head, mint, maxt, nil) |
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if err != nil { |
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return "", err |
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} |
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return filepath.Join(dir, ulid.String()), nil |
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}
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