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metrics-exporter.go
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/
metrics-exporter.go
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/*
This work is licensed and released under GNU GPL v3 or any other later versions.
The full text of the license is below/ found at <http://www.gnu.org/licenses/>
(c) 2023 Rocket Pool Pty Ltd. Modified under GNU GPL v3. [1.2.1]
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package guardian
import (
"fmt"
"net/http"
"os"
"strings"
"github.com/stader-labs/stader-node/stader/guardian/collector"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promhttp"
"github.com/stader-labs/stader-node/shared/services"
"github.com/stader-labs/stader-node/shared/utils/log"
"github.com/urfave/cli"
)
func runMetricsServer(c *cli.Context, logger log.ColorLogger, stateLocker *collector.MetricsCacheContainer) error {
// Get services
cfg, err := services.GetConfig(c)
if err != nil {
return err
}
bc, err := services.GetBeaconClient(c)
if err != nil {
return err
}
ec, err := services.GetEthClient(c)
if err != nil {
return err
}
// Return if metrics are disabled
if cfg.EnableMetrics.Value == false && cfg.ExposeGuardianPort.Value == false {
if strings.ToLower(os.Getenv("ENABLE_METRICS")) == "true" {
logger.Printlnf("ENABLE_METRICS override set to true, will start Metrics exporter anyway!")
} else {
return nil
}
}
w, err := services.GetWallet(c)
if err != nil {
return err
}
nodeAccount, err := w.GetNodeAccount()
if err != nil {
return err
}
nodeAccountAddr := nodeAccount.Address
beaconCollector := collector.NewBeaconCollector(bc, ec, nodeAccountAddr, stateLocker)
networkCollector := collector.NewNetworkCollector(bc, ec, nodeAccountAddr, stateLocker)
operatorCollector := collector.NewOperatorCollector(bc, ec, nodeAccountAddr, stateLocker)
// Set up Prometheus
registry := prometheus.NewRegistry()
registry.MustRegister(beaconCollector)
registry.MustRegister(networkCollector)
registry.MustRegister(operatorCollector)
handler := promhttp.HandlerFor(registry, promhttp.HandlerOpts{})
// Start the HTTP server
metricsAddress := c.GlobalString("metricsAddress")
metricsPort := c.GlobalUint("metricsPort")
logger.Printlnf("Starting metrics exporter on %s:%d.", metricsAddress, metricsPort)
metricsPath := "/metrics"
http.Handle(metricsPath, handler)
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
w.Write([]byte(`<html>
<head><title>Stader Guardian Metrics Exporter</title></head>
<body>
<h1>Stader Guardian Metrics Exporter</h1>
<p><a href='` + metricsPath + `'>Metrics</a></p>
</body>
</html>`,
))
})
err = http.ListenAndServe(fmt.Sprintf("%s:%d", metricsAddress, metricsPort), nil)
if err != nil {
return fmt.Errorf("Error running HTTP server: %w", err)
}
return nil
}