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server.go
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server.go
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// Copyright (C) 2019-2022, Ava Labs, Inc. All rights reserved.
// See the file LICENSE for licensing terms.
package server
import (
"context"
"fmt"
"os"
"os/signal"
"syscall"
"time"
"github.com/ava-labs/avalanche-network-runner/server"
"github.com/ava-labs/avalanche-network-runner/utils/constants"
"github.com/ava-labs/avalanchego/utils/logging"
"github.com/spf13/cobra"
"go.uber.org/zap"
)
func init() {
cobra.EnablePrefixMatching = true
}
var (
logLevel string
logDir string
port string
gwPort string
gwDisabled bool
dialTimeout time.Duration
disableNodesOutput bool
snapshotsDir string
)
func NewCommand() *cobra.Command {
cmd := &cobra.Command{
Use: "server [options]",
Short: "Start a network runner server.",
RunE: serverFunc,
Args: cobra.ExactArgs(0),
}
cmd.PersistentFlags().StringVar(&logLevel, "log-level", logging.Info.String(), "log level for server logs")
cmd.PersistentFlags().StringVar(&logDir, "log-dir", "", "log directory")
cmd.PersistentFlags().StringVar(&port, "port", ":8080", "server port")
cmd.PersistentFlags().StringVar(&gwPort, "grpc-gateway-port", ":8081", "grpc-gateway server port")
cmd.PersistentFlags().BoolVar(&gwDisabled, "disable-grpc-gateway", false, "true to disable grpc-gateway server (overrides --grpc-gateway-port)")
cmd.PersistentFlags().DurationVar(&dialTimeout, "dial-timeout", 10*time.Second, "server dial timeout")
cmd.PersistentFlags().BoolVar(&disableNodesOutput, "disable-nodes-output", false, "true to disable nodes stdout/stderr")
cmd.PersistentFlags().StringVar(&snapshotsDir, "snapshots-dir", "", "directory for snapshots")
return cmd
}
func serverFunc(*cobra.Command, []string) (err error) {
if logDir == "" {
logDir, err = os.MkdirTemp("", fmt.Sprintf("anr-server-logs-%d", time.Now().Unix()))
if err != nil {
return err
}
}
lvl, err := logging.ToLevel(logLevel)
if err != nil {
return err
}
lcfg := logging.Config{
DisplayLevel: lvl,
LogLevel: lvl,
}
lcfg.Directory = logDir
logFactory := logging.NewFactory(lcfg)
log, err := logFactory.Make(constants.LogNameMain)
if err != nil {
return err
}
s, err := server.New(server.Config{
Port: port,
GwPort: gwPort,
GwDisabled: gwDisabled,
DialTimeout: dialTimeout,
RedirectNodesOutput: !disableNodesOutput,
SnapshotsDir: snapshotsDir,
LogLevel: lvl,
}, log)
if err != nil {
return err
}
rootCtx, rootCancel := context.WithCancel(context.Background())
errc := make(chan error)
go func() {
errc <- s.Run(rootCtx)
}()
sigc := make(chan os.Signal, 1)
signal.Notify(sigc, syscall.SIGINT, syscall.SIGTERM)
select {
case sig := <-sigc:
log.Warn("signal received: closing server", zap.String("signal", sig.String()))
rootCancel()
// wait for server stop
waitForServerStop := <-errc
log.Warn("closed server", zap.Error(waitForServerStop))
case serverClosed := <-errc:
// server already stopped here
_ = rootCancel
log.Warn("server closed", zap.Error(serverClosed))
}
return err
}