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

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package main
import (
"context"
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"flag"
"fmt"
"os"
"sync"
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"git.frostfs.info/TrueCloudLab/frostfs-node/internal/logs"
"git.frostfs.info/TrueCloudLab/frostfs-node/misc"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/innerring"
irMetrics "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/metrics"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util/logger"
"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
EnvPrefix = "FROSTFS_IR"
)
var (
wg = new(sync.WaitGroup)
intErr = make(chan error) // internal inner ring errors
logPrm = new(logger.Prm)
innerRing *innerring.Server
pprofCmp *pprofComponent
metricsCmp *httpComponent
log *logger.Logger
cfg *viper.Viper
configFile *string
configDir *string
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)
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)
}
var err error
cfg, err = newConfig()
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exitErr(err)
metrics := irMetrics.NewInnerRingMetrics()
err = logPrm.SetLevelString(
cfg.GetString("logger.level"),
)
exitErr(err)
logPrm.SamplingHook = metrics.LogMetrics().GetSamplingHook()
log, err = logger.NewLogger(logPrm)
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exitErr(err)
ctx, cancel := context.WithCancel(context.Background())
pprofCmp = newPprofComponent()
pprofCmp.init()
metricsCmp = newMetricsComponent()
metricsCmp.init()
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innerRing, err = innerring.New(ctx, log, cfg, intErr, metrics)
exitErr(err)
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pprofCmp.start()
metricsCmp.start()
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// start inner ring
err = innerRing.Start(ctx, intErr)
exitErr(err)
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log.Info(logs.CommonApplicationStarted,
zap.String("version", misc.Version))
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watchForSignal(cancel)
<-ctx.Done() // graceful shutdown
log.Debug(logs.FrostFSNodeWaitingForAllProcessesToStop)
wg.Wait()
log.Info(logs.FrostFSIRApplicationStopped)
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}
func shutdown() {
innerRing.Stop()
if err := metricsCmp.shutdown(); err != nil {
log.Debug(logs.FrostFSIRCouldNotShutdownHTTPServer,
zap.String("error", err.Error()),
)
}
if err := pprofCmp.shutdown(); err != nil {
log.Debug(logs.FrostFSIRCouldNotShutdownHTTPServer,
zap.String("error", err.Error()),
)
}
}