func (collector *PrometheusCollector) GetSpec() []v1.MetricSpec {
specs := []v1.MetricSpec{}
response, err := http.Get(collector.configFile.Endpoint)
if err != nil {
return specs
}
defer response.Body.Close()
pageContent, err := ioutil.ReadAll(response.Body)
if err != nil {
return specs
}
lines := strings.Split(string(pageContent), "\n")
for i, line := range lines {
if strings.HasPrefix(line, "# HELP") {
stopIndex := strings.Index(lines[i+2], "{")
if stopIndex == -1 {
stopIndex = strings.Index(lines[i+2], " ")
}
name := strings.TrimSpace(lines[i+2][0:stopIndex])
if _, ok := collector.metricsSet[name]; collector.metricsSet != nil && !ok {
continue
}
spec := v1.MetricSpec{
Name: name,
Type: v1.MetricType(getMetricData(lines[i+1])),
Format: "float",
Units: getMetricData(lines[i]),
}
specs = append(specs, spec)
}
}
return specs
}
// metricType converts Prometheus metric type to cadvisor metric type.
// If there is no mapping then just return the name of the Prometheus metric type.
func metricType(t rawmodel.MetricType) v1.MetricType {
switch t {
case rawmodel.MetricType_COUNTER:
return v1.MetricCumulative
case rawmodel.MetricType_GAUGE:
return v1.MetricGauge
default:
return v1.MetricType(t.String())
}
}