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// SPDX-License-Identifier: GPL-3.0-or-later
package haproxy
import (
"errors"
"strings"
"github.com/netdata/netdata/go/go.d.plugin/agent/module"
"github.com/netdata/netdata/go/go.d.plugin/pkg/prometheus"
)
const (
metricBackendSessionsTotal = "haproxy_backend_sessions_total"
metricBackendCurrentSessions = "haproxy_backend_current_sessions"
metricBackendHTTPResponsesTotal = "haproxy_backend_http_responses_total"
metricBackendResponseTimeAverageSeconds = "haproxy_backend_response_time_average_seconds"
metricBackendCurrentQueue = "haproxy_backend_current_queue"
metricBackendQueueTimeAverageSeconds = "haproxy_backend_queue_time_average_seconds"
metricBackendBytesInTotal = "haproxy_backend_bytes_in_total"
metricBackendBytesOutTotal = "haproxy_backend_bytes_out_total"
)
func isHaproxyMetrics(pms prometheus.Series) bool {
for _, pm := range pms {
if strings.HasPrefix(pm.Name(), "haproxy_") {
return true
}
}
return false
}
func (h *Haproxy) collect() (map[string]int64, error) {
pms, err := h.prom.ScrapeSeries()
if err != nil {
return nil, err
}
if h.validateMetrics && !isHaproxyMetrics(pms) {
return nil, errors.New("unexpected metrics (not HAProxy)")
}
h.validateMetrics = false
mx := make(map[string]int64)
for _, pm := range pms {
proxy := pm.Labels.Get("proxy")
if proxy == "" {
continue
}
if !h.proxies[proxy] {
h.proxies[proxy] = true
h.addProxyToCharts(proxy)
}
mx[dimID(pm)] = int64(pm.Value * multiplier(pm))
}
return mx, nil
}
func (h *Haproxy) addProxyToCharts(proxy string) {
h.addDimToChart(chartBackendCurrentSessions.ID, &module.Dim{
ID: proxyDimID(metricBackendCurrentSessions, proxy),
Name: proxy,
})
h.addDimToChart(chartBackendSessions.ID, &module.Dim{
ID: proxyDimID(metricBackendSessionsTotal, proxy),
Name: proxy,
Algo: module.Incremental,
})
h.addDimToChart(chartBackendResponseTimeAverage.ID, &module.Dim{
ID: proxyDimID(metricBackendResponseTimeAverageSeconds, proxy),
Name: proxy,
})
if err := h.Charts().Add(newChartBackendHTTPResponses(proxy)); err != nil {
h.Warning(err)
}
h.addDimToChart(chartBackendCurrentQueue.ID, &module.Dim{
ID: proxyDimID(metricBackendCurrentQueue, proxy),
Name: proxy,
})
h.addDimToChart(chartBackendQueueTimeAverage.ID, &module.Dim{
ID: proxyDimID(metricBackendQueueTimeAverageSeconds, proxy),
Name: proxy,
})
if err := h.Charts().Add(newChartBackendNetworkIO(proxy)); err != nil {
h.Warning(err)
}
}
func (h *Haproxy) addDimToChart(chartID string, dim *module.Dim) {
chart := h.Charts().Get(chartID)
if chart == nil {
h.Warningf("error on adding '%s' dimension: can not find '%s' chart", dim.ID, chartID)
return
}
if err := chart.AddDim(dim); err != nil {
h.Warning(err)
return
}
chart.MarkNotCreated()
}
func multiplier(pm prometheus.SeriesSample) float64 {
switch pm.Name() {
case metricBackendResponseTimeAverageSeconds,
metricBackendQueueTimeAverageSeconds:
// to milliseconds
return 1000
}
return 1
}
func dimID(pm prometheus.SeriesSample) string {
proxy := pm.Labels.Get("proxy")
if proxy == "" {
return ""
}
name := cleanMetricName(pm.Name())
if pm.Name() == metricBackendHTTPResponsesTotal {
name += "_" + pm.Labels.Get("code")
}
return proxyDimID(name, proxy)
}
func proxyDimID(metric, proxy string) string {
return cleanMetricName(metric) + "_proxy_" + proxy
}
func cleanMetricName(name string) string {
if strings.HasSuffix(name, "_total") {
return name[:len(name)-6]
}
if strings.HasSuffix(name, "_seconds") {
return name[:len(name)-8]
}
return name
}
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