lerko
8f17deba67
Move Go module from gitea.lerkolabs.com/lerko/uptop to gitea.lerkolabs.com/lerkolabs/uptop. Updates all imports, go.mod, goreleaser owner, and README links.
122 lines
3.8 KiB
Go
122 lines
3.8 KiB
Go
package metrics
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import (
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"fmt"
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"gitea.lerkolabs.com/lerkolabs/uptop/internal/models"
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"gitea.lerkolabs.com/lerkolabs/uptop/internal/monitor"
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"net/http"
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"sort"
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"strings"
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)
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func Handler(eng *monitor.Engine) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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sites := eng.GetAllSites()
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sort.Slice(sites, func(i, j int) bool { return sites[i].ID < sites[j].ID })
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var b strings.Builder
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writeHelp(&b, "uptop_monitor_up", "gauge", "Whether the monitor is up (1) or down (0).")
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for _, s := range sites {
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val := 0
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if s.Status == "UP" {
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val = 1
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}
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writeGauge(&b, "uptop_monitor_up", labels(s), float64(val))
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}
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writeHelp(&b, "uptop_monitor_latency_seconds", "gauge", "Last check latency in seconds.")
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for _, s := range sites {
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writeGauge(&b, "uptop_monitor_latency_seconds", labels(s), s.Latency.Seconds())
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}
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writeHelp(&b, "uptop_monitor_status_code", "gauge", "HTTP response status code of the last check.")
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for _, s := range sites {
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if s.Type != "http" {
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continue
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}
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writeGauge(&b, "uptop_monitor_status_code", labels(s), float64(s.StatusCode))
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}
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writeHelp(&b, "uptop_monitor_check_timestamp_seconds", "gauge", "Unix timestamp of the last check.")
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for _, s := range sites {
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if s.LastCheck.IsZero() {
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continue
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}
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writeGauge(&b, "uptop_monitor_check_timestamp_seconds", labels(s), float64(s.LastCheck.Unix()))
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}
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writeHelp(&b, "uptop_monitor_paused", "gauge", "Whether the monitor is paused (1) or active (0).")
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for _, s := range sites {
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val := 0
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if s.Paused {
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val = 1
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}
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writeGauge(&b, "uptop_monitor_paused", labels(s), float64(val))
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}
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writeHelp(&b, "uptop_monitor_maintenance", "gauge", "Whether the monitor is in a maintenance window (1) or not (0).")
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for _, s := range sites {
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val := 0
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if eng.GetDisplayStatus(s) == "MAINT" {
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val = 1
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}
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writeGauge(&b, "uptop_monitor_maintenance", labels(s), float64(val))
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}
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writeHelp(&b, "uptop_monitor_cert_expiry_timestamp_seconds", "gauge", "Unix timestamp when the SSL certificate expires.")
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for _, s := range sites {
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if !s.HasSSL || s.CertExpiry.IsZero() {
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continue
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}
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writeGauge(&b, "uptop_monitor_cert_expiry_timestamp_seconds", labels(s), float64(s.CertExpiry.Unix()))
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}
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writeHelp(&b, "uptop_monitor_checks_total", "counter", "Total number of checks performed.")
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writeHelp(&b, "uptop_monitor_checks_up_total", "counter", "Total number of successful checks.")
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for _, s := range sites {
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h, ok := eng.GetHistory(s.ID)
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if !ok {
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continue
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}
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writeGauge(&b, "uptop_monitor_checks_total", labels(s), float64(h.TotalChecks))
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writeGauge(&b, "uptop_monitor_checks_up_total", labels(s), float64(h.UpChecks))
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}
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writeHelp(&b, "uptop_probe_up", "gauge", "Whether a probe node is online (1) or offline (0) based on last-seen time.")
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for _, site := range sites {
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probeResults := eng.GetProbeResults(site.ID)
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for nodeID, result := range probeResults {
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val := 0
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if result.IsUp {
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val = 1
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}
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nodeLabels := fmt.Sprintf(`id="%d",name="%s",node="%s"`, site.ID, escapeLabelValue(site.Name), escapeLabelValue(nodeID))
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writeGauge(&b, "uptop_probe_up", nodeLabels, float64(val))
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}
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}
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w.Header().Set("Content-Type", "text/plain; version=0.0.4; charset=utf-8")
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_, _ = w.Write([]byte(b.String())) //nolint:errcheck
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}
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}
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func labels(s models.Site) string {
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return fmt.Sprintf(`id="%d",name="%s",type="%s"`, s.ID, escapeLabelValue(s.Name), s.Type)
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}
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func escapeLabelValue(s string) string {
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s = strings.ReplaceAll(s, `\`, `\\`)
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s = strings.ReplaceAll(s, `"`, `\"`)
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s = strings.ReplaceAll(s, "\n", `\n`)
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return s
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}
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func writeHelp(b *strings.Builder, name, typ, help string) {
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fmt.Fprintf(b, "# HELP %s %s\n# TYPE %s %s\n", name, help, name, typ)
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}
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func writeGauge(b *strings.Builder, name, labels string, val float64) {
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fmt.Fprintf(b, "%s{%s} %g\n", name, labels, val)
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}
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