Sysd is an app Life cycle manager. it runs the apps and restarts them if they crash. It also provides a simple way to manage the apps.
To install sysd, use go get:
go get github.com/mirzakhany/sysdSample application:
package main
import (
"context"
"log"
"time"
"github.com/mirzakhany/sysd"
)
type appA struct {
}
func (a *appA) Start(ctx context.Context, restored bool) error {
log.Println("appA started")
defer func() {
log.Println("appA stopped")
}()
return sysd.ShutdownGracefully(ctx, func() error {
time.Sleep(5 * time.Second)
log.Println("appA received shutdown signal")
return nil
})
}
func (a *appA) Status(ctx context.Context) error {
log.Println("appA status")
return nil
}
func (a *appA) Name() string {
return "appA"
}
func main() {
systemd := sysd.New()
systemd.SetGraceFulShutdownTimeout(4 * time.Second)
systemd.SetStatusCheckInterval(1 * time.Second)
a := &appA{}
if err := systemd.Add(a); err != nil {
panic(err)
}
// listen for os exit signals
ctx := sysd.ContextWithSignals()
// start all apps
if err := systemd.Start(ctx); err != nil {
panic(err)
}
}