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outposts: don't panic when listening for metrics fails

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Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>
This commit is contained in:
Jens Langhammer
2021-11-19 10:37:13 +01:00
parent 8d1fd48003
commit 2ac9f5426d
5 changed files with 14 additions and 10 deletions
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10
internal/web/metrics.go
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@ -21,6 +21,7 @@ var (
func RunMetricsServer() {
m := mux.NewRouter()
l := log.WithField("logger", "authentik.router.metrics")
m.Path("/metrics").HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
promhttp.InstrumentMetricHandler(
prometheus.DefaultRegisterer, promhttp.HandlerFor(prometheus.DefaultGatherer, promhttp.HandlerOpts{
@ -31,26 +32,27 @@ func RunMetricsServer() {
// Get upstream metrics
re, err := http.NewRequest("GET", "http://localhost:8000/metrics/", nil)
if err != nil {
log.WithError(err).Warning("failed to get upstream metrics")
l.WithError(err).Warning("failed to get upstream metrics")
return
}
re.SetBasicAuth("monitor", config.G.SecretKey)
res, err := http.DefaultClient.Do(re)
if err != nil {
log.WithError(err).Warning("failed to get upstream metrics")
l.WithError(err).Warning("failed to get upstream metrics")
return
}
bm, err := ioutil.ReadAll(res.Body)
if err != nil {
log.WithError(err).Warning("failed to get upstream metrics")
l.WithError(err).Warning("failed to get upstream metrics")
return
}
_, err = rw.Write(bm)
if err != nil {
log.WithError(err).Warning("failed to get upstream metrics")
l.WithError(err).Warning("failed to get upstream metrics")
return
}
})
l.WithField("listen", config.G.Web.ListenMetrics).Info("Listening (metrics)")
err := http.ListenAndServe(config.G.Web.ListenMetrics, m)
if err != nil {
panic(err)