Files
nasmon/cmd/nasmon/main.go
T
a.gritsenkoandClaude Sonnet 5 09159a5f31 Initial import: nasmon health monitor, split out of home_nas
Go service (nasmon/) plus nfpm packaging (packaging/), carried over from
the home_nas monorepo. Adds rpm packaging alongside the existing deb
build (Fedora/RHEL/Rocky dependency names via nfpm overrides, per-format
systemd unit path, dpkg+rpm-compatible maintainer scripts) and a Gitea
Actions workflow that builds both formats on every push.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
2026-09-19 10:24:34 +03:00

85 lines
2.1 KiB
Go

// nasmon — lightweight NAS health monitor: web dashboard + SMART/ZFS alerts by e-mail.
package main
import (
"context"
"errors"
"flag"
"fmt"
"log"
"net/http"
"os"
"os/signal"
"path/filepath"
"syscall"
"time"
"nasmon/internal/alert"
"nasmon/internal/config"
"nasmon/internal/history"
"nasmon/internal/sched"
"nasmon/internal/shares"
"nasmon/internal/store"
"nasmon/internal/web"
)
var version = "dev"
func main() {
listen := flag.String("listen", ":8090", "HTTP listen address")
dataDir := flag.String("data", "/var/lib/nasmon", "directory for the SQLite database")
cfgPath := flag.String("config", "/etc/nasmon/config.json", "settings file (created on first save)")
showVer := flag.Bool("version", false, "print version and exit")
flag.Parse()
if *showVer {
fmt.Println("nasmon", version)
return
}
log.SetFlags(log.LstdFlags | log.Lmsgprefix)
cfg, err := config.Load(*cfgPath)
if err != nil {
log.Fatalf("config: %v", err)
}
if err := os.MkdirAll(*dataDir, 0o750); err != nil {
log.Fatalf("data dir: %v", err)
}
st, err := store.Open(filepath.Join(*dataDir, "nasmon.db"))
if err != nil {
log.Fatalf("database: %v", err)
}
defer st.Close()
sh, err := shares.Load(filepath.Join(filepath.Dir(*cfgPath), "shares.json"))
if err != nil {
log.Fatalf("shares config: %v", err)
}
ring := history.New(24 * 60 * 6) // 24 h at 10 s
am := &alert.Manager{Store: st, Config: cfg, Send: alert.SendMail}
sc := sched.New(cfg, st, ring, am, version)
sc.LoadCachedSmart()
ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
defer stop()
go sc.Run(ctx)
srv := &http.Server{
Addr: *listen,
Handler: web.New(cfg, st, ring, sc, sh),
ReadHeaderTimeout: 10 * time.Second,
}
go func() {
log.Printf("nasmon %s listening on %s", version, *listen)
if err := srv.ListenAndServe(); err != nil && !errors.Is(err, http.ErrServerClosed) {
log.Fatalf("http: %v", err)
}
}()
<-ctx.Done()
log.Print("shutting down")
shutdownCtx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
defer cancel()
_ = srv.Shutdown(shutdownCtx)
}