Improve WriteToTextfile doc
Signed-off-by: Sevag Hanssian <sevag.hanssian@gmail.com>
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@ -537,9 +537,12 @@ func (r *Registry) Gather() ([]*dto.MetricFamily, error) {
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return internal.NormalizeMetricFamilies(metricFamiliesByName), errs.MaybeUnwrap()
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}
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// WriteToTextfile formats the metrics of the provided Gatherer interface and
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// emits them in text format to the path. Intended for use with the node_exporter
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// textfile collector
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// WriteToTextfile calls Gather on the provided Gatherer, encodes the result in the
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// Prometheus text format, and writes it to a temporary file. Upon success, the
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// temporary file is renamed to the provided filename.
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//
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// This is intended for use with the textfile collector of the node exporter.
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// Note that the node exporter expects the filename to be suffixed with ".prom".
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func WriteToTextfile(filename string, g Gatherer) error {
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tmp, err := ioutil.TempFile(filepath.Dir(filename), filepath.Base(filename))
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if err != nil {
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