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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,108 @@ | ||
| package collector | ||
|
|
||
| import ( | ||
| "net/http" | ||
| "sync" | ||
|
|
||
| "github.com/prometheus/client_golang/prometheus" | ||
| ) | ||
|
|
||
| func isConnzEndpoint(endpoint string) bool { | ||
| return endpoint == "connz" | ||
| } | ||
|
|
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| type connzCollector struct { | ||
| sync.Mutex | ||
|
|
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| httpClient *http.Client | ||
| servers []*CollectedServer | ||
|
|
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| numConnections *prometheus.Desc | ||
| total *prometheus.Desc | ||
| offset *prometheus.Desc | ||
| limit *prometheus.Desc | ||
| pendingBytes *prometheus.Desc | ||
| } | ||
|
|
||
| func newConnzCollector(servers []*CollectedServer) prometheus.Collector { | ||
| nc := &connzCollector{ | ||
| httpClient: http.DefaultClient, | ||
| numConnections: prometheus.NewDesc( | ||
| prometheus.BuildFQName("gnatsd", "connz", "num_connections"), | ||
| "num_connections", | ||
| []string{"server_id"}, | ||
| nil, | ||
| ), | ||
| offset: prometheus.NewDesc( | ||
| prometheus.BuildFQName("gnatsd", "connz", "offset"), | ||
| "offset", | ||
| []string{"server_id"}, | ||
| nil, | ||
| ), | ||
| total: prometheus.NewDesc( | ||
| prometheus.BuildFQName("gnatsd", "connz", "total"), | ||
| "total", | ||
| []string{"server_id"}, | ||
| nil, | ||
| ), | ||
| limit: prometheus.NewDesc( | ||
| prometheus.BuildFQName("gnatsd", "connz", "limit"), | ||
| "limit", | ||
| []string{"server_id"}, | ||
| nil, | ||
| ), | ||
| pendingBytes: prometheus.NewDesc( | ||
| prometheus.BuildFQName("gnatsd", "connz", "pending_bytes"), | ||
| "pending_bytes", | ||
| []string{"server_id"}, | ||
| nil, | ||
| ), | ||
| } | ||
|
|
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| nc.servers = make([]*CollectedServer, len(servers)) | ||
| for i, s := range servers { | ||
| nc.servers[i] = &CollectedServer{ | ||
| ID: s.ID, | ||
| URL: s.URL + "/connz", | ||
| } | ||
| } | ||
|
|
||
| return nc | ||
| } | ||
|
|
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| func (nc *connzCollector) Describe(ch chan<- *prometheus.Desc) { | ||
| ch <- nc.limit | ||
| } | ||
|
|
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| // Collect gathers the streaming server serverz metrics. | ||
| func (nc *connzCollector) Collect(ch chan<- prometheus.Metric) { | ||
| for _, server := range nc.servers { | ||
| var resp Connz | ||
| if err := getMetricURL(nc.httpClient, server.URL, &resp); err != nil { | ||
| Debugf("ignoring server %s: %v", server.ID, err) | ||
| continue | ||
| } | ||
|
|
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| var pendingBytes = 0 | ||
| for _, conn := range resp.Connections { | ||
| pendingBytes += conn.PendingBytes | ||
| } | ||
|
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||
| ch <- prometheus.MustNewConstMetric(nc.numConnections, prometheus.GaugeValue, float64(resp.NumConnections), server.ID) | ||
| ch <- prometheus.MustNewConstMetric(nc.total, prometheus.GaugeValue, float64(resp.Total), server.ID) | ||
| ch <- prometheus.MustNewConstMetric(nc.offset, prometheus.GaugeValue, float64(resp.Offset), server.ID) | ||
| ch <- prometheus.MustNewConstMetric(nc.limit, prometheus.GaugeValue, float64(resp.Limit), server.ID) | ||
| ch <- prometheus.MustNewConstMetric(nc.pendingBytes, prometheus.GaugeValue, float64(pendingBytes), server.ID) | ||
| } | ||
| } | ||
|
|
||
| // Connz output | ||
| type Connz struct { | ||
| NumConnections int `json:"num_connections"` | ||
| Total int `json:"total"` | ||
| Offset int `json:"offset"` | ||
| Limit int `json:"limit"` | ||
| Connections []struct { | ||
| PendingBytes int `json:"pending_bytes"` | ||
| } `json:"connections"` | ||
| } |
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