frostfs-node/cmd/frostfs-ir/main.go

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package main
import (
"context"
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"flag"
"fmt"
"net/http"
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"os"
"os/signal"
"syscall"
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"git.frostfs.info/TrueCloudLab/frostfs-node/misc"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/innerring"
httputil "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util/http"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util/logger"
"github.com/prometheus/client_golang/prometheus/promhttp"
"github.com/spf13/viper"
"go.uber.org/zap"
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)
const (
// ErrorReturnCode returns when application crashed at initialization stage.
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ErrorReturnCode = 1
// SuccessReturnCode returns when application closed without panic.
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SuccessReturnCode = 0
)
func exitErr(err error) {
if err != nil {
fmt.Println(err)
os.Exit(ErrorReturnCode)
}
}
func main() {
configFile := flag.String("config", "", "path to config")
configDir := flag.String("config-dir", "", "path to config directory")
versionFlag := flag.Bool("version", false, "frostfs-ir node version")
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flag.Parse()
if *versionFlag {
fmt.Print(misc.BuildInfo("FrostFS Inner Ring node"))
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os.Exit(SuccessReturnCode)
}
cfg, err := newConfig(*configFile, *configDir)
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exitErr(err)
var logPrm logger.Prm
err = logPrm.SetLevelString(
cfg.GetString("logger.level"),
)
exitErr(err)
log, err := logger.NewLogger(&logPrm)
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exitErr(err)
ctx, cancel := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM, syscall.SIGHUP)
defer cancel()
intErr := make(chan error) // internal inner ring errors
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httpServers := initHTTPServers(cfg, log)
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innerRing, err := innerring.New(ctx, log, cfg, intErr)
exitErr(err)
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// start HTTP servers
for i := range httpServers {
srv := httpServers[i]
go func() {
exitErr(srv.Serve())
}()
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}
// start inner ring
err = innerRing.Start(ctx, intErr)
exitErr(err)
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log.Info("application started",
zap.String("version", misc.Version))
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select {
case <-ctx.Done():
case err := <-intErr:
log.Info("internal error", zap.String("msg", err.Error()))
}
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innerRing.Stop()
// shut down HTTP servers
for i := range httpServers {
srv := httpServers[i]
go func() {
err := srv.Shutdown()
if err != nil {
log.Debug("could not shutdown HTTP server",
zap.String("error", err.Error()),
)
}
}()
}
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log.Info("application stopped")
}
func initHTTPServers(cfg *viper.Viper, log *logger.Logger) []*httputil.Server {
items := []struct {
cfgPrefix string
handler func() http.Handler
}{
{"pprof", httputil.Handler},
{"prometheus", promhttp.Handler},
}
httpServers := make([]*httputil.Server, 0, len(items))
for _, item := range items {
if !cfg.GetBool(item.cfgPrefix + ".enabled") {
log.Info(item.cfgPrefix + " is disabled, skip")
continue
}
addr := cfg.GetString(item.cfgPrefix + ".address")
var prm httputil.HTTPSrvPrm
prm.Address = addr
prm.Handler = item.handler()
httpServers = append(httpServers,
httputil.New(prm,
httputil.WithShutdownTimeout(
cfg.GetDuration(item.cfgPrefix+".shutdown_timeout"),
),
),
)
}
return httpServers
}