func (c *vmStatCollector) Update(ch chan<- prometheus.Metric) (err error) {
file, err := os.Open(procFilePath("vmstat"))
if err != nil {
return err
}
defer file.Close()
scanner := bufio.NewScanner(file)
for scanner.Scan() {
parts := strings.Fields(scanner.Text())
value, err := strconv.ParseFloat(parts[1], 64)
if err != nil {
return err
}
metric := prometheus.NewUntyped(prometheus.UntypedOpts{
Namespace: Namespace,
Subsystem: vmStatSubsystem,
Name: parts[0],
Help: fmt.Sprintf("/proc/vmstat information field %s.", parts[0]),
})
metric.Set(value)
metric.Collect(ch)
}
return err
}
func (e *Exporter) setGenericMetric(name string, value float64) {
if _, ok := e.metrics[name]; !ok {
e.metrics[name] = prometheus.NewUntyped(prometheus.UntypedOpts{
Namespace: namespace,
Name: name,
})
}
e.metrics[name].Set(value)
}