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TUN-3738: Refactor observer to avoid potential of blocking on tunnel notifications

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This commit is contained in:
Igor Postelnik
2021-01-14 16:33:36 -06:00
committed by Arég Harutyunyan
parent 8c9d725eeb
commit 04b1e4f859
12 changed files with 201 additions and 111 deletions
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14
connection/metrics.go
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@@ -299,7 +299,7 @@ func convertRTTMilliSec(t time.Duration) float64 {
}
// Metrics that can be collected without asking the edge
func newTunnelMetrics() *tunnelMetrics {
func initTunnelMetrics() *tunnelMetrics {
maxConcurrentRequestsPerTunnel := prometheus.NewGaugeVec(
prometheus.GaugeOpts{
Namespace: MetricsNamespace,
@@ -403,3 +403,15 @@ func (t *tunnelMetrics) registerServerLocation(connectionID, loc string) {
t.serverLocations.WithLabelValues(connectionID, loc).Inc()
t.oldServerLocations[connectionID] = loc
}
var tunnelMetricsInternal struct {
sync.Once
metrics *tunnelMetrics
}
func newTunnelMetrics() *tunnelMetrics {
tunnelMetricsInternal.Do(func() {
tunnelMetricsInternal.metrics = initTunnelMetrics()
})
return tunnelMetricsInternal.metrics
}