64 lines
1.4 KiB
Go
64 lines
1.4 KiB
Go
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package template
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import (
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"github.com/influxdata/telegraf"
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"github.com/influxdata/telegraf/plugins/processors"
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"strings"
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"text/template"
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)
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type TemplateProcessor struct {
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Tag string `toml:"tag"`
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Template string `toml:"template"`
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tmpl *template.Template
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}
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const sampleConfig = `
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## Concatenate two tags to create a new tag
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# [[processors.template]]
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# ## Tag to create
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# tag = "topic"
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# ## Template to create tag
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# Note: Single quotes (') are used, so the double quotes (") don't need escaping (\")
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# template = '{{.Tag "hostname"}}.{{ .Tag "level" }}'
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`
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func (r *TemplateProcessor) SampleConfig() string {
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return sampleConfig
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}
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func (r *TemplateProcessor) Description() string {
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return "Uses a Go template to create a new tag"
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}
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func (r *TemplateProcessor) Apply(in ...telegraf.Metric) []telegraf.Metric {
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// for each metric in "in" array
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for _, metric := range in {
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var b strings.Builder
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newM := TemplateMetric{metric}
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// supply TemplateMetric and Template from configuration to Template.Execute
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err := r.tmpl.Execute(&b, &newM)
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if err != nil {
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panic(err)
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}
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metric.AddTag(r.Tag, b.String())
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}
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return in
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}
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func (r *TemplateProcessor) Init() error {
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// create template
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t, err := template.New("configured_template").Parse(r.Template)
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r.tmpl = t
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return err
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}
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func init() {
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processors.Add("printer", func() telegraf.Processor {
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return &TemplateProcessor{}
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})
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}
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