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supervisord_exporter.go
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supervisord_exporter.go
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package main
import (
"flag"
"fmt"
"log"
"net/http"
"os"
"time"
"github.com/kolo/xmlrpc"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promhttp"
)
var (
supervisordURL string
listenAddress string
metricsPath string
version bool
appVersion float32 = 0.1
processesMetric = prometheus.NewGaugeVec(
prometheus.GaugeOpts{
Name: "supervisor_process_info",
Help: "Supervisor process information",
},
[]string{"name", "group", "state", "exit_status"},
)
supervisorProcessUptime = prometheus.NewGaugeVec(
prometheus.GaugeOpts{
Name: "supervisor_process_uptime",
Help: "Uptime of Supervisor processes",
},
[]string{"name", "group"},
)
supervisordUp = prometheus.NewGauge(
prometheus.GaugeOpts{
Name: "supervisord_up",
Help: "Supervisord XML-RPC connection status (1 if up, 0 if down)",
},
)
)
func init() {
flag.StringVar(&supervisordURL, "supervisord-url", "http://localhost:9001/RPC2", "Supervisord XML-RPC URL")
flag.StringVar(&listenAddress, "web.listen-address", ":9876", "Address to listen for HTTP requests")
flag.StringVar(&metricsPath, "web.telemetry-path", "/metrics", "Path under which to expose metrics")
flag.BoolVar(&version, "version", false, "Displays application version")
flag.Parse()
prometheus.MustRegister(processesMetric)
prometheus.MustRegister(supervisorProcessUptime)
prometheus.MustRegister(supervisordUp)
}
func fetchSupervisorProcessInfo() {
client, err := xmlrpc.NewClient(supervisordURL, nil)
if err != nil {
log.Printf("Error creating Supervisor XML-RPC client: %v", err)
supervisordUp.Set(0)
processesMetric.Reset()
supervisorProcessUptime.Reset()
return
}
defer client.Close()
result := []map[string]interface{}{}
if err := client.Call("supervisor.getAllProcessInfo", nil, &result); err != nil {
log.Printf("Error calling Supervisor XML-RPC method: %v", err)
supervisordUp.Set(0)
processesMetric.Reset()
supervisorProcessUptime.Reset()
return
}
supervisordUp.Set(1)
// Create a map to store the latest process information for each unique combination of name and group
latestInfo := make(map[string]map[string]interface{})
for _, data := range result {
name, _ := data["name"].(string)
group, _ := data["group"].(string)
// Generate a unique key for the combination of name and group
key := name + group
// Check if the latest information for this combination already exists
if existing, ok := latestInfo[key]; ok {
// Compare timestamps to determine which information is more recent
existingStartTime, _ := existing["start"].(int64)
newStartTime, _ := data["start"].(int64)
// If the new information is more recent, update the latestInfo map
if newStartTime > existingStartTime {
latestInfo[key] = data
}
} else {
// If no previous information exists for this combination, add it to the map
latestInfo[key] = data
}
}
// Clear the previous metric values
processesMetric.Reset()
supervisorProcessUptime.Reset()
for _, data := range latestInfo {
name, _ := data["name"].(string)
group, _ := data["group"].(string)
state, _ := data["statename"].(string)
exitStatus, _ := data["exitstatus"].(int)
startTime, _ := data["start"].(int64)
value := 0
if state == "RUNNING" {
value = 1
}
processesMetric.WithLabelValues(name, group, state, fmt.Sprintf("%d", exitStatus)).Set(float64(value))
// Calculate uptime and set the supervisor_process_uptime metric
if value == 1 {
uptime := time.Now().Unix() - startTime
supervisorProcessUptime.WithLabelValues(name, group).Set(float64(uptime))
}
}
}
func metricsHandler(w http.ResponseWriter, r *http.Request) {
fetchSupervisorProcessInfo()
promhttp.Handler().ServeHTTP(w, r)
}
func main() {
if version {
fmt.Printf("Supervisor Exporter v%v\n", appVersion)
os.Exit(0)
}
http.HandleFunc(metricsPath, metricsHandler)
fmt.Printf("Listening on %s\n", listenAddress)
if err := http.ListenAndServe(listenAddress, nil); err != nil {
fmt.Printf("Error: %s\n", err)
os.Exit(1)
}
}