node_exporter/collector/runit.go

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// +build !norunit
package collector
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import (
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/log"
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"github.com/soundcloud/go-runit/runit"
)
type runitCollector struct {
state, stateDesired, stateNormal *prometheus.GaugeVec
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}
func init() {
Factories["runit"] = NewRunitCollector
}
func NewRunitCollector() (Collector, error) {
var (
subsystem = "service"
constLabels = prometheus.Labels{"supervisor": "runit"}
labelNames = []string{"service"}
)
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return &runitCollector{
state: prometheus.NewGaugeVec(
prometheus.GaugeOpts{
Namespace: Namespace,
Subsystem: subsystem,
Name: "state",
Help: "state of runit service.",
ConstLabels: constLabels,
},
labelNames,
),
stateDesired: prometheus.NewGaugeVec(
prometheus.GaugeOpts{
Namespace: Namespace,
Subsystem: subsystem,
Name: "desired_state",
Help: "desired state of runit service.",
ConstLabels: constLabels,
},
labelNames,
),
stateNormal: prometheus.NewGaugeVec(
prometheus.GaugeOpts{
Namespace: Namespace,
Subsystem: subsystem,
Name: "normal_state",
Help: "normal state of runit service.",
ConstLabels: constLabels,
},
labelNames,
),
}, nil
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}
func (c *runitCollector) Update(ch chan<- prometheus.Metric) error {
services, err := runit.GetServices("/etc/service")
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if err != nil {
return err
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}
for _, service := range services {
status, err := service.Status()
if err != nil {
log.Debugf("Couldn't get status for %s: %s, skipping...", service.Name, err)
continue
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}
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log.Debugf("%s is %d on pid %d for %d seconds", service.Name, status.State, status.Pid, status.Duration)
c.state.WithLabelValues(service.Name).Set(float64(status.State))
c.stateDesired.WithLabelValues(service.Name).Set(float64(status.Want))
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if status.NormallyUp {
c.stateNormal.WithLabelValues(service.Name).Set(1)
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} else {
c.stateNormal.WithLabelValues(service.Name).Set(0)
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}
}
c.state.Collect(ch)
c.stateDesired.Collect(ch)
c.stateNormal.Collect(ch)
return nil
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}