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// 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 (
"github.com/go-kit/kit/log"
"github.com/go-kit/kit/log/level"
"github.com/prometheus/client_golang/prometheus"
"github.com/soundcloud/go-runit/runit"
"gopkg.in/alecthomas/kingpin.v2"
)
var runitServiceDir = kingpin.Flag("collector.runit.servicedir", "Path to runit service directory.").Default("/etc/service").String()
type runitCollector struct {
state typedDesc
stateDesired typedDesc
stateNormal typedDesc
stateTimestamp typedDesc
logger log.Logger
}
func init() {
registerCollector("runit", defaultDisabled, NewRunitCollector)
}
// NewRunitCollector returns a new Collector exposing runit statistics.
func NewRunitCollector(logger log.Logger) (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},
logger: logger,
}, 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 {
level.Debug(c.logger).Log("msg", "Couldn't get status", "service", service.Name, "err", err)
continue
}
level.Debug(c.logger).Log("msg", "duration", "service", service.Name, "status", status.State, "pid", status.Pid, "duration_seconds", 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
}
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