martin-helmich/prometheus-nginxlog-exporter

package metrics

import (
    "github.com/martin-helmich/prometheus-nginxlog-exporter/pkg/config"
    "github.com/martin-helmich/prometheus-nginxlog-exporter/pkg/relabeling"
    "github.com/prometheus/client_golang/prometheus"
)

// Init initializes a metrics struct
func (m *Collection) Init(cfg *config.NamespaceConfig) {
    cfg.MustCompile()

    labels := cfg.OrderedLabelNames
    counterLabels := labels

    relabelings := relabeling.NewRelabelings(cfg.RelabelConfigs)
    relabelings = append(relabelings, relabeling.DefaultRelabelings...)
    relabelings = relabeling.UniqueRelabelings(relabelings)

    for _, r := range relabelings {
        if !r.OnlyCounter {
            labels = append(labels, r.TargetLabel)
        }
        counterLabels = append(counterLabels, r.TargetLabel)
    }

    m.CountTotal = prometheus.NewCounterVec(prometheus.CounterOpts{
        Namespace:   cfg.NamespacePrefix,
        ConstLabels: cfg.NamespaceLabels,
        Name:        "http_response_count_total",
        Help:        "Amount of processed HTTP requests",
    }, counterLabels)

    m.ResponseBytesTotal = prometheus.NewCounterVec(prometheus.CounterOpts{
        Namespace:   cfg.NamespacePrefix,
        ConstLabels: cfg.NamespaceLabels,
        Name:        "http_response_size_bytes",
        Help:        "Total amount of transferred bytes",
    }, labels)

    m.RequestBytesTotal = prometheus.NewCounterVec(prometheus.CounterOpts{
        Namespace:   cfg.NamespacePrefix,
        ConstLabels: cfg.NamespaceLabels,
        Name:        "http_request_size_bytes",
        Help:        "Total amount of received bytes",
    }, labels)

    m.UpstreamSeconds = prometheus.NewSummaryVec(prometheus.SummaryOpts{
        Namespace:   cfg.NamespacePrefix,
        ConstLabels: cfg.NamespaceLabels,
        Name:        "http_upstream_time_seconds",
        Help:        "Time needed by upstream servers to handle requests",
        Objectives:  map[float64]float64{0.5: 0.05, 0.9: 0.01, 0.99: 0.001},
    }, labels)

    m.UpstreamSecondsHist = prometheus.NewHistogramVec(prometheus.HistogramOpts{
        Namespace:   cfg.NamespacePrefix,
        ConstLabels: cfg.NamespaceLabels,
        Name:        "http_upstream_time_seconds_hist",
        Help:        "Time needed by upstream servers to handle requests",
        Buckets:     cfg.HistogramBuckets,
    }, labels)

    m.UpstreamConnectSeconds = prometheus.NewSummaryVec(prometheus.SummaryOpts{
        Namespace:   cfg.NamespacePrefix,
        ConstLabels: cfg.NamespaceLabels,
        Name:        "http_upstream_connect_time_seconds",
        Help:        "Time needed to connect to upstream servers",
        Objectives:  map[float64]float64{0.5: 0.05, 0.9: 0.01, 0.99: 0.001},
    }, labels)

    m.UpstreamConnectSecondsHist = prometheus.NewHistogramVec(prometheus.HistogramOpts{
        Namespace:   cfg.NamespacePrefix,
        ConstLabels: cfg.NamespaceLabels,
        Name:        "http_upstream_connect_time_seconds_hist",
        Help:        "Time needed to connect to upstream servers",
        Buckets:     cfg.HistogramBuckets,
    }, labels)

    m.ResponseSeconds = prometheus.NewSummaryVec(prometheus.SummaryOpts{
        Namespace:   cfg.NamespacePrefix,
        ConstLabels: cfg.NamespaceLabels,
        Name:        "http_response_time_seconds",
        Help:        "Time needed by NGINX to handle requests",
        Objectives:  map[float64]float64{0.5: 0.05, 0.9: 0.01, 0.99: 0.001},
    }, labels)

    m.ResponseSecondsHist = prometheus.NewHistogramVec(prometheus.HistogramOpts{
        Namespace:   cfg.NamespacePrefix,
        ConstLabels: cfg.NamespaceLabels,
        Name:        "http_response_time_seconds_hist",
        Help:        "Time needed by NGINX to handle requests",
        Buckets:     cfg.HistogramBuckets,
    }, labels)

    m.ParseErrorsTotal = prometheus.NewCounter(prometheus.CounterOpts{
        Namespace:   cfg.NamespacePrefix,
        ConstLabels: cfg.NamespaceLabels,
        Name:        "parse_errors_total",
        Help:        "Total number of log file lines that could not be parsed",
    })
}