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add host metrics (#3277)

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* add host metrics

Signed-off-by: yeya24 <yb532204897@gmail.com>

* update hosts readme docs

Signed-off-by: yeya24 <yb532204897@gmail.com>
This commit is contained in:
yeya24
2019-09-19 11:38:15 -04:00
committed by Miek Gieben
parent 62317c3c14
commit 85e65702bd
4 changed files with 35 additions and 1 deletions
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20
plugin/hosts/hostsfile.go
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@@ -17,6 +17,8 @@ import (
"time"
"github.com/coredns/coredns/plugin"
"github.com/prometheus/client_golang/prometheus"
)
// parseIP calls discards any v6 zone info, before calling net.ParseIP.
@@ -135,6 +137,8 @@ func (h *Hostsfile) readHosts() {
h.mtime = stat.ModTime()
h.size = stat.Size()
hostsEntries.WithLabelValues().Set(float64(h.inline.Len() + h.hmap.Len()))
hostsReloadTime.Set(float64(stat.ModTime().UnixNano()) / 1e9)
h.Unlock()
}
@@ -252,3 +256,19 @@ func (h *Hostsfile) LookupStaticAddr(addr string) []string {
copy(hostsCp[len(hosts1):], hosts2)
return hostsCp
}
var (
hostsEntries = prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: plugin.Namespace,
Subsystem: "hosts",
Name: "entries_count",
Help: "The combined number of entries in hosts and Corefile.",
}, []string{})
hostsReloadTime = prometheus.NewGauge(prometheus.GaugeOpts{
Namespace: plugin.Namespace,
Subsystem: "hosts",
Name: "reload_timestamp_seconds",
Help: "The timestamp of the last reload of hosts file.",
})
)