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Add Marathon-SD metrics. (#2106)

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This commit is contained in:
Dominik Schulz 2016-10-21 12:14:53 +02:00 committed by Brian Brazil
parent 296644adeb
commit f002fe186a
1 changed files with 33 additions and 1 deletions
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34
retrieval/discovery/marathon/marathon.go
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@ -24,6 +24,7 @@ import (
"golang.org/x/net/context"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/common/log"
"github.com/prometheus/common/model"
"github.com/prometheus/prometheus/config"
@ -41,8 +42,31 @@ const (
imageLabel model.LabelName = metaLabelPrefix + "image"
// taskLabel contains the mesos task name of the app instance.
taskLabel model.LabelName = metaLabelPrefix + "task"
// Constants for instrumentation.
namespace = "prometheus"
)
var (
scrapeFailuresCount = prometheus.NewCounter(
prometheus.CounterOpts{
Namespace: namespace,
Name: "sd_marathon_scrape_failures_total",
Help: "The number of Marathon-SD scrape failures.",
})
scrapeDuration = prometheus.NewSummary(
prometheus.SummaryOpts{
Namespace: namespace,
Name: "sd_marathon_scrape_duration_seconds",
Help: "The duration of a Marathon-SD scrape in seconds.",
})
)
func init() {
prometheus.MustRegister(scrapeFailuresCount)
prometheus.MustRegister(scrapeDuration)
}
const appListPath string = "/v2/apps/?embed=apps.tasks"
// Discovery provides service discovery based on a Marathon instance.
@ -70,7 +94,15 @@ func (md *Discovery) Run(ctx context.Context, ch chan<- []*config.TargetGroup) {
}
}
func (md *Discovery) updateServices(ctx context.Context, ch chan<- []*config.TargetGroup) error {
func (md *Discovery) updateServices(ctx context.Context, ch chan<- []*config.TargetGroup) (err error) {
t0 := time.Now()
defer func() {
scrapeDuration.Observe(time.Since(t0).Seconds())
if err != nil {
scrapeFailuresCount.Inc()
}
}()
targetMap, err := md.fetchTargetGroups()
if err != nil {
return err