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fs/fshttp/prometheus.go
51 строка
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Michał Matczuk
fshttp: add prometheus metrics for HTTP status code
17 ноя 2021, 18:38
17 ноя 2021, 18:38
38dc3e9
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package fshttp import ( "fmt" "net/http" "github.com/prometheus/client_golang/prometheus" ) // Metrics provide Transport HTTP level metrics. type Metrics struct { StatusCode *prometheus.CounterVec } // NewMetrics creates a new metrics instance, the instance shall be assigned to // DefaultMetrics before any processing takes place. func NewMetrics(namespace string) *Metrics { return &Metrics{ StatusCode: prometheus.NewCounterVec(prometheus.CounterOpts{ Namespace: namespace, Subsystem: "http", Name: "status_code", }, []string{"host", "method", "code"}), } } // DefaultMetrics specifies metrics used for new Transports. var DefaultMetrics = (*Metrics)(nil) // Collectors returns all prometheus metrics as collectors for registration. func (m *Metrics) Collectors() []prometheus.Collector { if m == nil { return nil } return []prometheus.Collector{ m.StatusCode, } } func (m *Metrics) onResponse(req *http.Request, resp *http.Response) { if m == nil { return } var statusCode = 0 if resp != nil { statusCode = resp.StatusCode } m.StatusCode.WithLabelValues(req.Host, req.Method, fmt.Sprint(statusCode)).Inc() }