/
record_metrics.go
89 lines (73 loc) · 2.22 KB
/
record_metrics.go
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package cmd
import (
"archive/zip"
"fmt"
"io"
"net/http"
"os"
"time"
horizon "github.com/TosinShada/stellar-core/services/horizon/internal"
"github.com/TosinShada/stellar-core/support/errors"
"github.com/TosinShada/stellar-core/support/log"
"github.com/spf13/cobra"
)
var recordMetricsCmd = &cobra.Command{
Use: "record-metrics",
Short: "records `/metrics` on admin port for debuging purposes",
Long: "",
RunE: func(cmd *cobra.Command, args []string) error {
if err := horizon.ApplyFlags(config, flags, horizon.ApplyOptions{}); err != nil {
return err
}
const (
timeFormat = "2006-01-02-15-04-05"
scrapeIntervalSeconds = 15
scrapesCount = (60 / scrapeIntervalSeconds) * 10 // remember about rounding if change is required
)
client := &http.Client{
Timeout: 5 * time.Second,
}
outputFileName := fmt.Sprintf("./metrics-%s.zip", time.Now().Format(timeFormat))
outputFile, err := os.Create(outputFileName)
if err != nil {
return err
}
w := zip.NewWriter(outputFile)
defer w.Close()
for i := 1; i <= scrapesCount; i++ {
log.Infof(
"Getting metrics %d/%d... ETA: %s",
i,
scrapesCount,
time.Duration(time.Duration(scrapeIntervalSeconds*(scrapesCount-i))*time.Second),
)
metricsResponse, err := client.Get(fmt.Sprintf("http://127.0.0.1:%d/metrics", config.AdminPort))
if err != nil {
return errors.Wrap(err, "Error fetching metrics. Is admin server running?")
}
if metricsResponse.StatusCode != http.StatusOK {
return errors.Errorf("Invalid status code: %d. Is admin server running?", metricsResponse.StatusCode)
}
metricsFile, err := w.Create(time.Now().Format(timeFormat))
if err != nil {
return err
}
if _, err = io.Copy(metricsFile, metricsResponse.Body); err != nil {
return errors.Wrap(err, "Error reading response body. Is admin server running?")
}
// Flush to keep memory usage log and save at least some records in case of errors later.
err = w.Flush()
if err != nil {
return err
}
if i < scrapesCount {
time.Sleep(scrapeIntervalSeconds * time.Second)
}
}
log.Infof("Metrics recorded to %s!", outputFileName)
return nil
},
}
func init() {
RootCmd.AddCommand(recordMetricsCmd)
}