golang Iris运行多个应用的实现

package main

import (
    "log"
    "net/http"
    "time"

    "github.com/kataras/iris/v12"
    "github.com/kataras/iris/v12/middleware/recover"

    "golang.org/x/sync/errgroup"
)

var g errgroup.Group

func startApp1() error {
    app := iris.New().SetName("app1")
    app.Use(recover.New())
    app.Get("/", func(ctx iris.Context) {
        ctx.JSON(iris.Map{
            "code":  iris.StatusOK,
            "message": "Welcome server 1",
        })
    })

    app.Build()
   return app.Listen(":8080")
}

func startApp2() error {
    app := iris.New().SetName("app2")
    app.Use(recover.New())
    app.Get("/", func(ctx iris.Context) {
        ctx.JSON(iris.Map{
            "code":  iris.StatusOK,
            "message": "Welcome server 2",
        })
    })

    return app.Listen(":8081")
}

func main() {
    g.Go(startApp1)
    g.Go(startApp2)

    if err := g.Wait(); err != nil {
        log.Fatal(err)
    }
}

package main

import (
	"github.com/kataras/iris/v12"
	"github.com/kataras/iris/v12/apps"
	"github.com/kataras/iris/v12/middleware/recover"
)

func main() {
	app3 := iris.New().SetName("app3")
	app3.Use(recover.New())
	app3.Get("/", func(ctx iris.Context) {
		ctx.WriteString("ha3")
	})

	app4 := iris.New().SetName("app4")
	app4.Use(recover.New())
	app4.Get("/", func(ctx iris.Context) {
		ctx.WriteString("ha4")
	})

	switcher := apps.Switch(apps.Hosts{
		apps.Host{
			Pattern: "app3.local",
			Target:  app3,
		},
		apps.Host{
			Pattern: "app4.local",
			Target:  app4,
		},
	})
	switcher.Listen(":9010")
}