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start.go
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start.go
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package cmd
import (
"fmt"
"io"
"log"
"os"
"path/filepath"
"time"
"github.com/eviltomorrow/king/apps/king-brain/conf"
"github.com/eviltomorrow/king/apps/king-brain/domain/server"
"github.com/eviltomorrow/king/lib/buildinfo"
"github.com/eviltomorrow/king/lib/cleanup"
"github.com/eviltomorrow/king/lib/config"
"github.com/eviltomorrow/king/lib/db/mysql"
"github.com/eviltomorrow/king/lib/etcd"
"github.com/eviltomorrow/king/lib/fs"
"github.com/eviltomorrow/king/lib/grpc/lb"
"github.com/eviltomorrow/king/lib/grpc/middleware"
"github.com/eviltomorrow/king/lib/opentrace"
"github.com/eviltomorrow/king/lib/procutil"
"github.com/eviltomorrow/king/lib/system"
"github.com/eviltomorrow/king/lib/workflow"
"github.com/eviltomorrow/king/lib/zlog"
"github.com/spf13/cobra"
"go.uber.org/zap"
"google.golang.org/grpc/resolver"
)
var workflowsFunc = func() []workflow.Job {
workflow.Register("setRuntimeEnv", setRuntimeEnv)
workflow.Register("loadConfig", loadConfig)
workflow.Register("printCfg", printCfg)
workflow.Register("setGlobalVars", setGlobalVars)
workflow.Register("runOpentrace", runOpentrace)
workflow.Register("runDB", runDB)
workflow.Register("runServer", runServer)
workflow.Register("buildPidFile", buildPidFile)
workflow.Register("rewritePaniclog", rewritePaniclog)
workflow.Register("notifyStopDaemon", notifyStopDaemon)
return workflow.Finish()
}()
var cfg = conf.Default
var (
isBackground bool
ppid int
)
func init() {
StartCommand.PersistentFlags().BoolVarP(&isBackground, "daemon", "d", false, "run app in background")
StartCommand.PersistentFlags().IntVar(&ppid, "ppid", -1, "bootup parent pid")
}
var StartCommand = &cobra.Command{
Use: "start",
Short: "Start the app in teminal(-d in background)",
Run: func(cmd *cobra.Command, args []string) {
begin := time.Now()
if isBackground {
if err := procutil.RunAppBackground(os.Args[0], []string{"start"}); err != nil {
log.Fatalf("[F] Run app in background failure, nest error: %v", err)
}
return
}
defer func() {
for _, err := range cleanup.RunCleanupFuncs() {
zlog.Error("Run cleanup funcs failure", zap.Error(err))
}
zlog.Info("Stop app complete", zap.String("app-name", buildinfo.AppName), zap.String("running-duration", system.Runtime.RunningDuration()))
}()
for _, job := range workflowsFunc {
if err := job.F(); err != nil {
log.Fatalf("[F] Run job failure, nest error: %v, job name: %v", err, job.Name)
}
}
zlog.Info("Start app success", zap.String("app-name", buildinfo.AppName), zap.Duration("cost", time.Since(begin)))
procutil.WaitForSigterm()
},
}
func setRuntimeEnv() error {
for _, dir := range []string{
filepath.Join(system.Runtime.RootDir, "/var/log"),
filepath.Join(system.Runtime.RootDir, "/var/run"),
} {
if err := fs.CreateDir(dir); err != nil {
return fmt.Errorf("create dir failure, nest error: %v", err)
}
}
return nil
}
func loadConfig() error {
if err := cfg.LoadFile(filepath.Join(system.Runtime.RootDir, "/etc/config.toml")); err != nil {
return err
}
closeFuncs, err := config.SetupLogger(cfg.Log)
if err != nil {
return err
}
cleanup.RegisterCleanupFuncs(closeFuncs...)
return nil
}
func setGlobalVars() error {
middleware.LogDir = filepath.Join(system.Runtime.RootDir, "/var/log")
etcd.Endpoints = cfg.Etcd.Endpoints
mysql.DSN = cfg.MySQL.DSN
mysql.MinOpen = cfg.MySQL.MinOpen
mysql.MaxOpen = cfg.MySQL.MaxOpen
return nil
}
func runOpentrace() error {
shutdown, err := opentrace.InitTraceProvider()
if err != nil {
return err
}
cleanup.RegisterCleanupFuncs(shutdown)
return nil
}
func runDB() error {
if err := mysql.Connect(); err != nil {
return err
}
cleanup.RegisterCleanupFuncs(mysql.Close)
return nil
}
func runServer() error {
client, err := etcd.NewClient()
if err != nil {
return err
}
cleanup.RegisterCleanupFuncs(client.Close)
if err := middleware.InitLogger(); err != nil {
return err
}
resolver.Register(lb.NewBuilder(client))
g := &server.GRPC{
AppName: buildinfo.AppName,
Host: cfg.Server.Host,
Port: cfg.Server.Port,
EtcdClient: client,
}
if err := g.Startup(); err != nil {
return err
}
cleanup.RegisterCleanupFuncs(g.Stop)
return nil
}
func rewritePaniclog() error {
fs.StderrFilePath = filepath.Join(system.Runtime.RootDir, "/var/log/panic.log")
if err := fs.RewriteStderrFile(); err != nil {
zlog.Error("RewriteStderrFile failure", zap.Error(err))
}
return nil
}
func buildPidFile() error {
closeFunc, err := procutil.CreatePidFile(filepath.Join(system.Runtime.RootDir, fmt.Sprintf("/var/run/%s.pid", buildinfo.AppName)), system.Runtime.Pid)
if err != nil {
return err
}
cleanup.RegisterCleanupFuncs(closeFunc)
return nil
}
func notifyStopDaemon() error {
if ppid == -1 {
return nil
}
if _, err := procutil.FindProcessWithPid(ppid); err != nil {
return err
}
confirmationBytes, err := io.ReadAll(os.Stdin)
if err != nil {
return fmt.Errorf("reading confirmation bytes from stdin: %v", err)
}
if len(confirmationBytes) == 0 {
return nil
}
return procutil.NotifyStopDaemon(confirmationBytes)
}
func printCfg() error {
zlog.Info("Load config success", zap.String("config", cfg.String()))
return nil
}