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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 !nosupervisord
package collector
import (
"context"
"fmt"
"net"
"net/http"
"net/url"
"time"
"github.com/go-kit/kit/log"
"github.com/go-kit/kit/log/level"
"github.com/mattn/go-xmlrpc"
"github.com/prometheus/client_golang/prometheus"
"gopkg.in/alecthomas/kingpin.v2"
)
var (
supervisordURL = kingpin.Flag("collector.supervisord.url", "XML RPC endpoint.").Default("http://localhost:9001/RPC2").String()
xrpc *xmlrpc.Client
)
type supervisordCollector struct {
upDesc *prometheus.Desc
stateDesc *prometheus.Desc
exitStatusDesc *prometheus.Desc
startTimeDesc *prometheus.Desc
logger log.Logger
}
func init() {
registerCollector("supervisord", defaultDisabled, NewSupervisordCollector)
}
// NewSupervisordCollector returns a new Collector exposing supervisord statistics.
func NewSupervisordCollector(logger log.Logger) (Collector, error) {
var (
subsystem = "supervisord"
labelNames = []string{"name", "group"}
)
if u, err := url.Parse(*supervisordURL); err == nil && u.Scheme == "unix" {
// Fake the URI scheme as http, since net/http.*Transport.roundTrip will complain
// about a non-http(s) transport.
xrpc = xmlrpc.NewClient("http://unix/RPC2")
xrpc.HttpClient.Transport = &http.Transport{
DialContext: func(ctx context.Context, _, _ string) (net.Conn, error) {
d := net.Dialer{Timeout: 10 * time.Second}
return d.DialContext(ctx, "unix", u.Path)
},
}
} else {
xrpc = xmlrpc.NewClient(*supervisordURL)
}
return &supervisordCollector{
upDesc: prometheus.NewDesc(
prometheus.BuildFQName(namespace, subsystem, "up"),
"Process Up",
labelNames,
nil,
),
stateDesc: prometheus.NewDesc(
prometheus.BuildFQName(namespace, subsystem, "state"),
"Process State",
labelNames,
nil,
),
exitStatusDesc: prometheus.NewDesc(
prometheus.BuildFQName(namespace, subsystem, "exit_status"),
"Process Exit Status",
labelNames,
nil,
),
startTimeDesc: prometheus.NewDesc(
prometheus.BuildFQName(namespace, subsystem, "start_time_seconds"),
"Process start time",
labelNames,
nil,
),
logger: logger,
}, nil
}
func (c *supervisordCollector) isRunning(state int) bool {
// http://supervisord.org/subprocess.html#process-states
const (
// STOPPED = 0
STARTING = 10
RUNNING = 20
// BACKOFF = 30
STOPPING = 40
// EXITED = 100
// FATAL = 200
// UNKNOWN = 1000
)
switch state {
case STARTING, RUNNING, STOPPING:
return true
}
return false
}
func (c *supervisordCollector) Update(ch chan<- prometheus.Metric) error {
var info struct {
Name string `xmlrpc:"name"`
Group string `xmlrpc:"group"`
Start int `xmlrpc:"start"`
Stop int `xmlrpc:"stop"`
Now int `xmlrpc:"now"`
State int `xmlrpc:"state"`
StateName string `xmlrpc:"statename"`
SpawnErr string `xmlrpc:"spanerr"`
ExitStatus int `xmlrpc:"exitstatus"`
StdoutLogfile string `xmlrcp:"stdout_logfile"`
StderrLogfile string `xmlrcp:"stderr_logfile"`
PID int `xmlrpc:"pid"`
}
res, err := xrpc.Call("supervisor.getAllProcessInfo")
if err != nil {
return fmt.Errorf("unable to call supervisord: %w", err)
}
for _, p := range res.(xmlrpc.Array) {
for k, v := range p.(xmlrpc.Struct) {
switch k {
case "name":
info.Name = v.(string)
case "group":
info.Group = v.(string)
case "start":
info.Start = v.(int)
case "stop":
info.Stop = v.(int)
case "now":
info.Now = v.(int)
case "state":
info.State = v.(int)
case "statename":
info.StateName = v.(string)
case "exitstatus":
info.ExitStatus = v.(int)
case "pid":
info.PID = v.(int)
}
}
labels := []string{info.Name, info.Group}
ch <- prometheus.MustNewConstMetric(c.stateDesc, prometheus.GaugeValue, float64(info.State), labels...)
ch <- prometheus.MustNewConstMetric(c.exitStatusDesc, prometheus.GaugeValue, float64(info.ExitStatus), labels...)
if c.isRunning(info.State) {
ch <- prometheus.MustNewConstMetric(c.upDesc, prometheus.GaugeValue, 1, labels...)
ch <- prometheus.MustNewConstMetric(c.startTimeDesc, prometheus.CounterValue, float64(info.Start), labels...)
} else {
ch <- prometheus.MustNewConstMetric(c.upDesc, prometheus.GaugeValue, 0, labels...)
}
level.Debug(c.logger).Log("msg", "process info", "group", info.Group, "name", info.Name, "state", info.StateName, "pid", info.PID)
}
return nil
}
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