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package metrics
import (
"fmt"
"strings"
"github.com/prometheus/client_golang/prometheus"
"rgdd.se/silentct/internal/monitor"
"rgdd.se/silentct/pkg/storage/index"
)
type Metrics struct {
errorCounter prometheus.Counter
logIndex *prometheus.GaugeVec
logSize *prometheus.GaugeVec
logTimestamp *prometheus.GaugeVec
needRestart prometheus.Gauge
unexpectedCertificateCount *prometheus.GaugeVec
}
func NewMetrics(registry *prometheus.Registry) *Metrics {
m := &Metrics{
errorCounter: prometheus.NewCounter(
prometheus.CounterOpts{
Name: "silentct_error_counter",
Help: "The number of errors propagated to the main loop.",
},
),
logIndex: prometheus.NewGaugeVec(
prometheus.GaugeOpts{
Name: "silentct_log_index",
Help: "The next log entry to be downloaded.",
},
[]string{"log_id"},
),
logSize: prometheus.NewGaugeVec(
prometheus.GaugeOpts{
Name: "silentct_log_size",
Help: "The number of entries in the log.",
},
[]string{"log_id"},
),
logTimestamp: prometheus.NewGaugeVec(
prometheus.GaugeOpts{
Name: "silentct_log_timestamp",
Help: "The log's UNIX timestamp in ms.",
},
[]string{"log_id"},
),
needRestart: prometheus.NewGauge(
prometheus.GaugeOpts{
Name: "silentct_need_restart",
Help: "A non-zero value if the monitor needs restarting.",
},
),
unexpectedCertificateCount: prometheus.NewGaugeVec(
prometheus.GaugeOpts{
Name: "silentct_unexpected_certificate_count",
Help: "Number of certificates without any allowlisting",
},
[]string{"log_id", "log_index", "crt_sans"},
),
}
registry.MustRegister(
m.errorCounter,
m.logIndex,
m.logSize,
m.logTimestamp,
m.needRestart,
m.unexpectedCertificateCount,
)
return m
}
func (m *Metrics) LogState(state monitor.State) {
id := fmt.Sprintf("%x", state.LogID)
m.logIndex.WithLabelValues(id).Set(float64(state.NextIndex))
m.logSize.WithLabelValues(id).Set(float64(state.TreeSize))
m.logTimestamp.WithLabelValues(id).Set(float64(state.Timestamp))
}
func (m *Metrics) RemoveLogState(state monitor.State) {
id := fmt.Sprintf("%x", state.LogID)
m.logIndex.Delete(prometheus.Labels{"id": id})
m.logSize.Delete(prometheus.Labels{"id": id})
m.logTimestamp.Delete(prometheus.Labels{"id": id})
}
func (m *Metrics) UnexpectedCertificateCount(alerts []index.CertificateInfo) {
m.unexpectedCertificateCount.Reset()
for _, alert := range alerts {
labels := prometheus.Labels{
"crt_sans": strings.Join(alert.SANs, " "),
"log_id": fmt.Sprintf("%x", alert.LogID),
"log_index": fmt.Sprintf("%d", alert.LogIndex),
}
m.unexpectedCertificateCount.With(labels).Set(1)
}
}
func (m *Metrics) CountError() {
m.errorCounter.Inc()
}
func (m *Metrics) NeedRestart() {
m.needRestart.Set(float64(1))
}
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