72 lines
1.5 KiB
Go
72 lines
1.5 KiB
Go
package prometheusremotewrite
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import (
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"errors"
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"fmt"
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"github.com/prometheus/prometheus/prompb"
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"github.com/influxdata/telegraf"
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"github.com/influxdata/telegraf/plugins/parsers"
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)
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type Parser struct {
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MetricVersion int `toml:"prometheus_metric_version"`
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DefaultTags map[string]string
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}
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func (p *Parser) Parse(buf []byte) ([]telegraf.Metric, error) {
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var err error
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var metrics []telegraf.Metric
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var req prompb.WriteRequest
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if err := req.Unmarshal(buf); err != nil {
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return nil, fmt.Errorf("unable to unmarshal request body: %w", err)
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}
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for _, ts := range req.Timeseries {
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var metricsFromTS []telegraf.Metric
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switch p.MetricVersion {
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case 0, 2:
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metricsFromTS, err = p.extractMetricsV2(&ts)
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case 1:
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metricsFromTS, err = p.extractMetricsV1(&ts)
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default:
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return nil, fmt.Errorf("unknown prometheus metric version %d", p.MetricVersion)
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}
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if err != nil {
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return nil, err
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}
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metrics = append(metrics, metricsFromTS...)
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}
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return metrics, err
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}
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func (p *Parser) ParseLine(line string) (telegraf.Metric, error) {
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metrics, err := p.Parse([]byte(line))
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if err != nil {
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return nil, err
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}
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if len(metrics) < 1 {
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return nil, errors.New("no metrics in line")
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}
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if len(metrics) > 1 {
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return nil, errors.New("more than one metric in line")
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}
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return metrics[0], nil
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}
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func (p *Parser) SetDefaultTags(tags map[string]string) {
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p.DefaultTags = tags
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}
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func init() {
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parsers.Add("prometheusremotewrite",
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func(string) telegraf.Parser {
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return &Parser{}
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})
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}
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