app-exporter/apps/nextcloud.go

package apps

import (
	"encoding/json"
	"fmt"
	"net/http"
	"os"

	"github.com/prometheus/client_golang/prometheus"
)

type apiResponse struct {
	Version string `json:"version"`
}

func Nextcloud(m Metrics) {
	hostname, err := os.Hostname()
	if err != nil {
		return
	}

	resp, err := http.Get(fmt.Sprintf("https://%s/status.php", hostname))
	if err != nil {
		return
	}
	defer resp.Body.Close()

	var res = apiResponse{}
	json.NewDecoder(resp.Body).Decode(&res)

	m.Nextcloud.With(prometheus.Labels{"version": res.Version}).Set(1)
}