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targetstatus.go
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targetstatus.go
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package promscrape
import (
"fmt"
"io"
"sort"
"strings"
"sync"
"time"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/promrelabel"
)
var tsmGlobal = newTargetStatusMap()
// WriteHumanReadableTargetsStatus writes human-readable status for all the scrape targets to w.
func WriteHumanReadableTargetsStatus(w io.Writer) {
tsmGlobal.WriteHumanReadable(w)
}
type targetStatusMap struct {
mu sync.Mutex
m map[string]targetStatus
}
func newTargetStatusMap() *targetStatusMap {
return &targetStatusMap{
m: make(map[string]targetStatus),
}
}
func (tsm *targetStatusMap) Reset() {
tsm.mu.Lock()
tsm.m = make(map[string]targetStatus)
tsm.mu.Unlock()
}
func (tsm *targetStatusMap) Update(sw *ScrapeWork, up bool, scrapeTime, scrapeDuration int64, err error) {
tsm.mu.Lock()
tsm.m[sw.ScrapeURL] = targetStatus{
sw: sw,
up: up,
scrapeTime: scrapeTime,
scrapeDuration: scrapeDuration,
err: err,
}
tsm.mu.Unlock()
}
func (tsm *targetStatusMap) WriteHumanReadable(w io.Writer) {
byJob := make(map[string][]targetStatus)
tsm.mu.Lock()
for k, st := range tsm.m {
if st.getDurationFromLastScrape() > 10*st.sw.ScrapeInterval {
// Remove obsolete targets
delete(tsm.m, k)
continue
}
job := ""
label := promrelabel.GetLabelByName(st.sw.Labels, "job")
if label != nil {
job = label.Value
}
byJob[job] = append(byJob[job], st)
}
tsm.mu.Unlock()
var jss []jobStatus
for job, statuses := range byJob {
jss = append(jss, jobStatus{
job: job,
statuses: statuses,
})
}
sort.Slice(jss, func(i, j int) bool {
return jss[i].job < jss[j].job
})
for _, js := range jss {
sts := js.statuses
sort.Slice(sts, func(i, j int) bool {
return sts[i].sw.ScrapeURL < sts[j].sw.ScrapeURL
})
ups := 0
for _, st := range sts {
if st.up {
ups++
}
}
fmt.Fprintf(w, "job=%q (%d/%d up)\n", js.job, ups, len(sts))
for _, st := range sts {
state := "up"
if !st.up {
state = "down"
}
var labels []string
for _, label := range promrelabel.FinalizeLabels(nil, st.sw.Labels) {
labels = append(labels, fmt.Sprintf("%s=%q", label.Name, label.Value))
}
labelsStr := "{" + strings.Join(labels, ", ") + "}"
lastScrape := st.getDurationFromLastScrape()
errMsg := ""
if st.err != nil {
errMsg = st.err.Error()
}
fmt.Fprintf(w, "\tstate=%s, endpoint=%s, labels=%s, last_scrape=%.3fs ago, scrape_duration=%.3fs, error=%q\n",
state, st.sw.ScrapeURL, labelsStr, lastScrape.Seconds(), float64(st.scrapeDuration)/1000, errMsg)
}
}
}
type jobStatus struct {
job string
statuses []targetStatus
}
type targetStatus struct {
sw *ScrapeWork
up bool
scrapeTime int64
scrapeDuration int64
err error
}
func (st *targetStatus) getDurationFromLastScrape() time.Duration {
return time.Since(time.Unix(st.scrapeTime/1000, (st.scrapeTime%1000)*1e6))
}