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Stats files

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This commit is contained in:
Jakob Borg 2015-05-31 13:31:28 +02:00
parent 9d06132743
commit 860fbe48dd
2 changed files with 72 additions and 2 deletions
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4
cmd/discosrv/main.go
View File

@ -21,6 +21,7 @@ var (
limitBurst = 20
dbConn = getEnvDefault("DISCOSRV_DB", "postgres://user:password@localhost/discosrv")
globalStats stats
statsFile string
)
func main() {
@ -38,6 +39,7 @@ func main() {
flag.IntVar(&lruSize, "limit-cache", lruSize, "Limiter cache entries")
flag.IntVar(&limitAvg, "limit-avg", limitAvg, "Allowed average package rate, per 10 s")
flag.IntVar(&limitBurst, "limit-burst", limitBurst, "Allowed burst size, packets")
flag.StringVar(&statsFile, "stats-file", statsFile, "File to write periodic operation stats to")
flag.Parse()
addr, _ := net.ResolveUDPAddr("udp", listen)
@ -74,6 +76,8 @@ func main() {
main.Add(&statssrv{
intv: statsIntv,
file: statsFile,
db: db,
})
globalStats.Reset()

70
cmd/discosrv/stats.go
View File

@ -3,7 +3,12 @@
package main
import (
"bytes"
"database/sql"
"fmt"
"io/ioutil"
"log"
"os"
"sync"
"time"
)
@ -52,6 +57,8 @@ func (s *stats) Reset() stats {
type statssrv struct {
intv time.Duration
file string
db *sql.DB
}
func (s *statssrv) Serve() {
@ -59,12 +66,71 @@ func (s *statssrv) Serve() {
time.Sleep(next(s.intv))
stats := globalStats.Reset()
s := time.Since(stats.reset).Seconds()
d := time.Since(stats.reset).Seconds()
log.Printf("Stats: %.02f announces/s, %.02f queries/s, %.02f answers/s, %.02f errors/s",
float64(stats.announces)/s, float64(stats.queries)/s, float64(stats.answers)/s, float64(stats.errors)/s)
float64(stats.announces)/d, float64(stats.queries)/d, float64(stats.answers)/d, float64(stats.errors)/d)
if s.file != "" {
s.writeToFile(stats, d)
}
}
}
func (s *statssrv) Stop() {
panic("stop unimplemented")
}
func (s *statssrv) writeToFile(stats stats, secs float64) {
newLine := []byte("\n")
var addrs int
row := s.db.QueryRow("SELECT COUNT(*) FROM Addresses")
if err := row.Scan(&addrs); err != nil {
log.Println("stats query:", err)
return
}
fd, err := os.OpenFile(s.file, os.O_RDWR|os.O_CREATE, 0666)
if err != nil {
log.Println("stats file:", err)
return
}
bs, err := ioutil.ReadAll(fd)
if err != nil {
log.Println("stats file:", err)
return
}
lines := bytes.Split(bytes.TrimSpace(bs), newLine)
if len(lines) > 12 {
lines = lines[len(lines)-12:]
}
latest := fmt.Sprintf("%v: %6d addresses, %8.02f announces/s, %8.02f queries/s, %8.02f answers/s, %8.02f errors/s\n",
time.Now().UTC().Format(time.RFC3339), addrs,
float64(stats.announces)/secs, float64(stats.queries)/secs, float64(stats.answers)/secs, float64(stats.errors)/secs)
lines = append(lines, []byte(latest))
_, err = fd.Seek(0, 0)
if err != nil {
log.Println("stats file:", err)
return
}
err = fd.Truncate(0)
if err != nil {
log.Println("stats file:", err)
return
}
_, err = fd.Write(bytes.Join(lines, newLine))
if err != nil {
log.Println("stats file:", err)
return
}
err = fd.Close()
if err != nil {
log.Println("stats file:", err)
return
}
}