package exporter
import (
"errors"
"fmt"
"net/http"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promhttp"
"github.com/goharbor/harbor/src/lib/log"
)
// Opt is the config of Harbor exporter
type Opt struct {
Port int
MetricsPath string
ExporterMetricsEnabled bool
MaxRequests int
TLSEnabled bool
Certificate string
Key string
CacheDuration int64
CacheCleanInterval int64
}
// NewExporter creates a exporter for Harbor with the configuration
func NewExporter(opt *Opt) *Exporter {
exporter := &Exporter{
Opt: opt,
collectors: make(map[string]prometheus.Collector),
}
if opt.CacheDuration > 0 {
CacheInit(opt)
}
exporter.RegisterCollector(healthCollectorName, NewHealthCollect(hbrCli))
exporter.RegisterCollector(systemInfoCollectorName, NewSystemInfoCollector(hbrCli))
exporter.RegisterCollector(ProjectCollectorName, NewProjectCollector())
r := prometheus.NewRegistry()
r.MustRegister(exporter)
exporter.Server = newServer(opt, r)
return exporter
}
// Exporter is struct for Harbor which can used to connection Harbor and collecting data
type Exporter struct {
*http.Server
Opt *Opt
collectors map[string]prometheus.Collector
}
// RegisterCollector register a collector to expoter
func (e *Exporter) RegisterCollector(name string, c prometheus.Collector) error {
if _, ok := e.collectors[name]; ok {
return errors.New("Collector name is already registered")
}
e.collectors[name] = c
log.Infof("collector %s registered ...", name)
return nil
}
func newServer(opt *Opt, r *prometheus.Registry) *http.Server {
exporterMux := http.NewServeMux()
exporterMux.Handle(opt.MetricsPath, promhttp.Handler())
exporterMux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
w.Write([]byte(`
Harbor Exporter
Harbor Exporter
Metrics
`))
})
return &http.Server{
Addr: fmt.Sprintf(":%d", opt.Port),
Handler: exporterMux,
}
}
// Describe implements prometheus.Collector
func (e *Exporter) Describe(c chan<- *prometheus.Desc) {
for _, v := range e.collectors {
v.Describe(c)
}
}
// Collect implements prometheus.Collector
func (e *Exporter) Collect(c chan<- prometheus.Metric) {
for _, v := range e.collectors {
v.Collect(c)
}
}