feature: run firecracker from go with tap interface

cmd/main.go

@@ -7,14 +7,20 @@ package main
 import (
 	"antoine-roux.tk/projects/go/firecracker-netns/internal/netlink"
 	"antoine-roux.tk/projects/go/firecracker-netns/internal/netns"
+	"context"
 	"fmt"
+	"github.com/firecracker-microvm/firecracker-go-sdk"
+	"github.com/firecracker-microvm/firecracker-go-sdk/client/models"
+	"github.com/sirupsen/logrus"
 	"net"
 	"os"
-	"os/exec"
 	"runtime"
 )
 
 func setupEnv() int {
+	log := logrus.New()
+	log.SetLevel(logrus.DebugLevel)
+
 	newNs, err := netns.New()
 	if err != nil {
 		fmt.Println("new ns error", err)
@@ -74,19 +80,73 @@ func setupEnv() int {
 
 	// Do something with the network namespace
 	interfaces, _ := net.Interfaces()
-	fmt.Printf("Interfaces: %v\n", interfaces)
+	log.Debugf("Interfaces: %v\n", interfaces)
 
-	cmd := exec.Command("/bin/sh")
+	ctx := context.Background()
+	cancel, cancelFunc := context.WithCancel(ctx)
+	defer cancelFunc()
 
-	cmd.Stdin = os.Stdin
-	cmd.Stdout = os.Stdout
-	cmd.Stderr = os.Stderr
+	cpuCount := int64(4)
+	memorySize := int64(1024)
+	isSmt := true
 
-	cmd.Env = []string{"PS1=-[ns-process]- # "}
+	cfg := firecracker.Config{
+		SocketPath:      "/tmp/firecracker.socket",
+		KernelImagePath: "./vmlinux-5.10.204",
+		LogPath:         "./firecracker.log",
+		LogLevel:        "Debug",
+		KernelArgs:      "console=ttyS0 reboot=k panic=1 pci=off",
+		Drives: []models.Drive{
+			{
+				DriveID:      firecracker.String("rootfs"),
+				PathOnHost:   firecracker.String("./ubuntu-22.04.ext4"),
+				IsReadOnly:   firecracker.Bool(false),
+				IsRootDevice: firecracker.Bool(true),
+			},
+		},
+		NetworkInterfaces: firecracker.NetworkInterfaces{
+			firecracker.NetworkInterface{
+				StaticConfiguration: &firecracker.StaticNetworkConfiguration{
+					MacAddress:  "06:00:AC:10:00:02",
+					HostDevName: tap.Link.Attrs().Name,
+				},
+			},
+		},
+		MachineCfg: models.MachineConfiguration{
+			VcpuCount:       &cpuCount,
+			MemSizeMib:      &memorySize,
+			Smt:             &isSmt,
+			TrackDirtyPages: true,
+		},
+	}
 
-	if err := cmd.Run(); err != nil {
-		fmt.Printf("Error running the /bin/sh command - %s\n", err)
-		os.Exit(1)
+	firecrackerOpts := []firecracker.Opt{
+		firecracker.WithProcessRunner(
+			firecracker.VMCommandBuilder{}.
+				WithBin("firecracker").
+				WithSocketPath("/tmp/firecracker.socket").
+				Build(ctx),
+		),
+		firecracker.WithLogger(logrus.NewEntry(log)),
+	}
+
+	vm, err := firecracker.NewMachine(cancel, cfg, firecrackerOpts...)
+	if err != nil {
+		log.Errorln("create vm error", err)
+		return 1
+	}
+	defer os.Remove(cfg.SocketPath)
+
+	defer vm.StopVMM()
+
+	if err := vm.Start(ctx); err != nil {
+		log.Errorln("start vm error", err)
+		return 1
+	}
+
+	if err := vm.Wait(ctx); err != nil {
+		log.Errorln("wait vm error", err)
+		return 1
 	}
 
 	return 0

go.mod

@@ -10,4 +10,38 @@ require (
 	golang.org/x/sys v0.15.0
 )
 
-require github.com/vishvananda/netns v0.0.0-20210104183010-2eb08e3e575f // indirect
+require (
+	github.com/PuerkitoBio/purell v1.1.1 // indirect
+	github.com/PuerkitoBio/urlesc v0.0.0-20170810143723-de5bf2ad4578 // indirect
+	github.com/asaskevich/govalidator v0.0.0-20210307081110-f21760c49a8d // indirect
+	github.com/containerd/fifo v1.0.0 // indirect
+	github.com/containernetworking/cni v1.0.1 // indirect
+	github.com/containernetworking/plugins v1.0.1 // indirect
+	github.com/firecracker-microvm/firecracker-go-sdk v1.0.0 // indirect
+	github.com/go-openapi/analysis v0.21.2 // indirect
+	github.com/go-openapi/errors v0.20.2 // indirect
+	github.com/go-openapi/jsonpointer v0.19.5 // indirect
+	github.com/go-openapi/jsonreference v0.19.6 // indirect
+	github.com/go-openapi/loads v0.21.1 // indirect
+	github.com/go-openapi/runtime v0.24.0 // indirect
+	github.com/go-openapi/spec v0.20.4 // indirect
+	github.com/go-openapi/strfmt v0.21.2 // indirect
+	github.com/go-openapi/swag v0.21.1 // indirect
+	github.com/go-openapi/validate v0.22.0 // indirect
+	github.com/go-stack/stack v1.8.1 // indirect
+	github.com/google/uuid v1.3.0 // indirect
+	github.com/hashicorp/errwrap v1.0.0 // indirect
+	github.com/hashicorp/go-multierror v1.1.1 // indirect
+	github.com/josharian/intern v1.0.0 // indirect
+	github.com/mailru/easyjson v0.7.7 // indirect
+	github.com/mitchellh/mapstructure v1.4.3 // indirect
+	github.com/oklog/ulid v1.3.1 // indirect
+	github.com/opentracing/opentracing-go v1.2.0 // indirect
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/sirupsen/logrus v1.8.1 // indirect
+	github.com/vishvananda/netns v0.0.0-20210104183010-2eb08e3e575f // indirect
+	go.mongodb.org/mongo-driver v1.8.3 // indirect
+	golang.org/x/net v0.0.0-20220127200216-cd36cc0744dd // indirect
+	golang.org/x/text v0.3.7 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+)