mirror of
https://github.com/strukturag/nextcloud-spreed-signaling
synced 2024-05-11 10:06:34 +02:00
Add metrics for current number of HTTP client connections.
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commit
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@ -48,3 +48,4 @@ The following metrics are available:
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| `signaling_grpc_clients` | Gauge | 1.0.0 | The current number of GRPC clients | |
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| `signaling_grpc_client_calls_total` | Counter | 1.0.0 | The total number of GRPC client calls | `method` |
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| `signaling_grpc_server_calls_total` | Counter | 1.0.0 | The total number of GRPC server calls | `method` |
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| `signaling_http_client_pool_connections` | Gauge | 1.2.4 | The current number of HTTP client connections per host | `host` |
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@ -29,10 +29,18 @@ import (
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"net/http"
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"net/url"
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"sync"
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"github.com/prometheus/client_golang/prometheus"
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)
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func init() {
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RegisterHttpClientPoolStats()
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}
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type Pool struct {
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pool chan *http.Client
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currentConnections prometheus.Gauge
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}
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func (p *Pool) get(ctx context.Context) (client *http.Client, err error) {
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@ -40,21 +48,24 @@ func (p *Pool) get(ctx context.Context) (client *http.Client, err error) {
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case <-ctx.Done():
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return nil, ctx.Err()
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case client := <-p.pool:
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p.currentConnections.Inc()
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return client, nil
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}
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}
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func (p *Pool) Put(c *http.Client) {
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p.currentConnections.Dec()
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p.pool <- c
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}
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func newPool(constructor func() *http.Client, size int) (*Pool, error) {
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func newPool(host string, constructor func() *http.Client, size int) (*Pool, error) {
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if size <= 0 {
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return nil, fmt.Errorf("can't create empty pool")
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}
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p := &Pool{
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pool: make(chan *http.Client, size),
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currentConnections: connectionsPerHostCurrent.WithLabelValues(host),
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}
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for size > 0 {
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c := constructor()
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@ -103,7 +114,7 @@ func (p *HttpClientPool) getPool(url *url.URL) (*Pool, error) {
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return pool, nil
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}
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pool, err := newPool(func() *http.Client {
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pool, err := newPool(url.Host, func() *http.Client {
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return &http.Client{
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Transport: p.transport,
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// Only send body in redirect if going to same scheme / host.
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43
http_client_pool_stats_prometheus.go
Normal file
43
http_client_pool_stats_prometheus.go
Normal file
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@ -0,0 +1,43 @@
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/**
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* Standalone signaling server for the Nextcloud Spreed app.
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* Copyright (C) 2024 struktur AG
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*
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* @author Joachim Bauch <bauch@struktur.de>
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*
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* @license GNU AGPL version 3 or any later version
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package signaling
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import (
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"github.com/prometheus/client_golang/prometheus"
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)
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var (
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connectionsPerHostCurrent = prometheus.NewGaugeVec(prometheus.GaugeOpts{
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Namespace: "signaling",
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Subsystem: "http_client_pool",
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Name: "connections",
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Help: "The current number of HTTP client connections per host",
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}, []string{"host"})
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httpClientPoolStats = []prometheus.Collector{
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connectionsPerHostCurrent,
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}
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)
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func RegisterHttpClientPoolStats() {
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registerAll(httpClientPoolStats...)
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}
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