node_exporter/collector/runit.go

95 lines
2.9 KiB
Go

// Copyright 2015 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// +build !norunit
package collector
import (
"flag"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/common/log"
"github.com/soundcloud/go-runit/runit"
)
var runitServiceDir = flag.String(
"collector.runit.servicedir",
"/etc/service",
"Path to runit service directory.")
type runitCollector struct {
state, stateDesired, stateNormal, stateTimestamp typedDesc
}
func init() {
Factories["runit"] = NewRunitCollector
}
func NewRunitCollector() (Collector, error) {
var (
subsystem = "service"
constLabels = prometheus.Labels{"supervisor": "runit"}
labelNames = []string{"service"}
)
return &runitCollector{
state: typedDesc{prometheus.NewDesc(
prometheus.BuildFQName(Namespace, subsystem, "state"),
"State of runit service.",
labelNames, constLabels,
), prometheus.GaugeValue},
stateDesired: typedDesc{prometheus.NewDesc(
prometheus.BuildFQName(Namespace, subsystem, "desired_state"),
"Desired state of runit service.",
labelNames, constLabels,
), prometheus.GaugeValue},
stateNormal: typedDesc{prometheus.NewDesc(
prometheus.BuildFQName(Namespace, subsystem, "normal_state"),
"Normal state of runit service.",
labelNames, constLabels,
), prometheus.GaugeValue},
stateTimestamp: typedDesc{prometheus.NewDesc(
prometheus.BuildFQName(Namespace, subsystem, "state_last_change_timestamp_seconds"),
"Unix timestamp of the last runit service state change.",
labelNames, constLabels,
), prometheus.GaugeValue},
}, nil
}
func (c *runitCollector) Update(ch chan<- prometheus.Metric) error {
services, err := runit.GetServices(*runitServiceDir)
if err != nil {
return err
}
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
}
log.Debugf("%s is %d on pid %d for %d seconds", service.Name, status.State, status.Pid, status.Duration)
ch <- c.state.mustNewConstMetric(float64(status.State), service.Name)
ch <- c.stateDesired.mustNewConstMetric(float64(status.Want), service.Name)
ch <- c.stateTimestamp.mustNewConstMetric(float64(status.Timestamp.Unix()), service.Name)
if status.NormallyUp {
ch <- c.stateNormal.mustNewConstMetric(1, service.Name)
} else {
ch <- c.stateNormal.mustNewConstMetric(0, service.Name)
}
}
return nil
}