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Add [defaults] placeholder support to collectors.enabled

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This commit is contained in:
Calle Pettersson
2017-03-04 12:44:47 +01:00
parent a05febe069
commit a66f0b5475
2 changed files with 72 additions and 4 deletions
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27
exporter.go
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@@ -25,8 +25,9 @@ type WmiCollector struct {
}
const (
defaultCollectors = "cpu,cs,logical_disk,net,os,service,system"
serviceName = "wmi_exporter"
defaultCollectors = "cpu,cs,logical_disk,net,os,service,system"
defaultCollectorsPlaceholder = "[defaults]"
serviceName = "wmi_exporter"
)
var (
@@ -90,9 +91,27 @@ func execute(name string, c collector.Collector, ch chan<- prometheus.Metric) {
scrapeDurations.WithLabelValues(name, result).Observe(duration.Seconds())
}
func expandEnabledCollectors(enabled string) []string {
expanded := strings.Replace(enabled, defaultCollectorsPlaceholder, defaultCollectors, -1)
separated := strings.Split(expanded, ",")
unique := map[string]bool{}
for _, s := range separated {
if s != "" {
unique[s] = true
}
}
result := make([]string, 0, len(unique))
for s, _ := range unique {
result = append(result, s)
}
return result
}
func loadCollectors(list string) (map[string]collector.Collector, error) {
collectors := map[string]collector.Collector{}
for _, name := range strings.Split(list, ",") {
enabled := expandEnabledCollectors(list)
for _, name := range enabled {
fn, ok := collector.Factories[name]
if !ok {
return nil, fmt.Errorf("collector '%s' not available", name)
@@ -115,7 +134,7 @@ func main() {
showVersion = flag.Bool("version", false, "Print version information.")
listenAddress = flag.String("telemetry.addr", ":9182", "host:port for WMI exporter.")
metricsPath = flag.String("telemetry.path", "/metrics", "URL path for surfacing collected metrics.")
enabledCollectors = flag.String("collectors.enabled", filterAvailableCollectors(defaultCollectors), "Comma-separated list of collectors to use.")
enabledCollectors = flag.String("collectors.enabled", filterAvailableCollectors(defaultCollectors), "Comma-separated list of collectors to use. Use '[default]' as a placeholder for all the collectors enabled by default")
printCollectors = flag.Bool("collectors.print", false, "If true, print available collectors and exit.")
)
flag.Parse()