Ejemplo n.º 1
0
func main() {
	repo := util.NewRepo()
	app := cli.NewApp()
	app.Name = "capstan"
	app.Version = VERSION
	app.Usage = "pack, ship, and run applications in light-weight VMs"
	app.Commands = []cli.Command{
		{
			Name:  "info",
			Usage: "show disk image information",
			Action: func(c *cli.Context) {
				if len(c.Args()) != 1 {
					fmt.Println("usage: capstan info [image-file]")
					return
				}
				image := c.Args()[0]
				err := cmd.Info(image)
				if err != nil {
					fmt.Println(err.Error())
				}
			},
		},
		{
			Name:  "import",
			Usage: "import an image to the local repository",
			Flags: []cli.Flag{
				cli.StringFlag{Name: "v", Value: "", Usage: "image version"},
				cli.StringFlag{Name: "c", Value: "", Usage: "image creation date"},
				cli.StringFlag{Name: "d", Value: "", Usage: "image description"},
				cli.StringFlag{Name: "b", Value: "", Usage: "image build command"},
			},
			Action: func(c *cli.Context) {
				if len(c.Args()) != 2 {
					fmt.Println("usage: capstan import [image-name] [image-file]")
					return
				}
				err := repo.ImportImage(c.Args()[0], c.Args()[1], c.String("v"), c.String("c"), c.String("d"), c.String("b"))
				if err != nil {
					fmt.Println(err.Error())
				}
			},
		},
		{
			Name:  "pull",
			Usage: "pull an image from a repository",
			Flags: []cli.Flag{
				cli.StringFlag{Name: "p", Value: hypervisor.Default(), Usage: "hypervisor: qemu|vbox|vmw|gce"},
			},
			Action: func(c *cli.Context) {
				if len(c.Args()) != 1 {
					fmt.Println("usage: capstan pull [image-name]")
					return
				}
				hypervisor := c.String("p")
				if !isValidHypervisor(hypervisor) {
					fmt.Printf("error: '%s' is not a supported hypervisor\n", c.String("p"))
					return
				}
				err := cmd.Pull(repo, hypervisor, c.Args().First())
				if err != nil {
					fmt.Println(err.Error())
				}
			},
		},
		{
			Name:  "rmi",
			Usage: "delete an image from a repository",
			Action: func(c *cli.Context) {
				if len(c.Args()) != 1 {
					fmt.Println("usage: capstan rmi [image-name]")
					return
				}
				err := repo.RemoveImage(c.Args().First())
				if err != nil {
					fmt.Println(err.Error())
				}
			},
		},
		{
			Name:  "run",
			Usage: "launch a VM. You may pass the image name as the first argument.",
			Flags: []cli.Flag{
				cli.StringFlag{Name: "i", Value: "", Usage: "image_name"},
				cli.StringFlag{Name: "p", Value: hypervisor.Default(), Usage: "hypervisor: qemu|vbox|vmw|gce"},
				cli.StringFlag{Name: "m", Value: "1G", Usage: "memory size"},
				cli.IntFlag{Name: "c", Value: 2, Usage: "number of CPUs"},
				cli.StringFlag{Name: "n", Value: "nat", Usage: "networking: nat|bridge|tap"},
				cli.BoolFlag{Name: "v", Usage: "verbose mode"},
				cli.StringFlag{Name: "b", Value: "", Usage: "networking device (bridge or tap): e.g., virbr0, vboxnet0, tap0"},
				cli.StringSliceFlag{Name: "f", Value: new(cli.StringSlice), Usage: "port forwarding rules"},
				cli.StringFlag{Name: "gce-upload-dir", Value: "", Usage: "Directory to upload local image to: e.g., gs://osvimg"},
				cli.StringFlag{Name: "mac", Value: "", Usage: "MAC address. If not specified, the MAC address will be generated automatically."},
			},
			Action: func(c *cli.Context) {
				config := &cmd.RunConfig{
					InstanceName: c.Args().First(),
					ImageName:    c.String("i"),
					Hypervisor:   c.String("p"),
					Verbose:      c.Bool("v"),
					Memory:       c.String("m"),
					Cpus:         c.Int("c"),
					Networking:   c.String("n"),
					Bridge:       c.String("b"),
					NatRules:     nat.Parse(c.StringSlice("f")),
					GCEUploadDir: c.String("gce-upload-dir"),
					MAC:          c.String("mac"),
				}
				if !isValidHypervisor(config.Hypervisor) {
					fmt.Printf("error: '%s' is not a supported hypervisor\n", config.Hypervisor)
					return
				}
				err := cmd.Run(repo, config)
				if err != nil {
					fmt.Println(err.Error())
				}
			},
		},
		{
			Name:  "build",
			Usage: "build an image",
			Flags: []cli.Flag{
				cli.StringFlag{Name: "p", Value: hypervisor.Default(), Usage: "hypervisor: qemu|vbox|vmw|gce"},
				cli.StringFlag{Name: "m", Value: "512M", Usage: "memory size"},
				cli.BoolFlag{Name: "v", Usage: "verbose mode"},
			},
			Action: func(c *cli.Context) {
				imageName := c.Args().First()
				if len(c.Args()) != 1 {
					imageName = repo.DefaultImage()
				}
				if imageName == "" {
					fmt.Println("usage: capstan build [image-name]")
					return
				}
				hypervisor := c.String("p")
				if !isValidHypervisor(hypervisor) {
					fmt.Printf("error: '%s' is not a supported hypervisor\n", c.String("p"))
					return
				}
				image := &core.Image{
					Name:       imageName,
					Hypervisor: hypervisor,
				}
				template, err := core.ReadTemplateFile("Capstanfile")
				if err != nil {
					fmt.Println(err.Error())
					return
				}
				if err := cmd.Build(repo, image, template, c.Bool("v"), c.String("m")); err != nil {
					fmt.Println(err.Error())
					return
				}
			},
		},
		{
			Name:      "images",
			ShortName: "i",
			Usage:     "list images",
			Action: func(c *cli.Context) {
				repo.ListImages()
			},
		},
		{
			Name:  "search",
			Usage: "search a remote images",
			Action: func(c *cli.Context) {
				image := ""
				if len(c.Args()) > 0 {
					image = c.Args()[0]
				}
				util.ListImagesRemote(image)
			},
		},
		{
			Name:      "instances",
			ShortName: "I",
			Usage:     "list instances",
			Action: func(c *cli.Context) {
				cmd.Instances()
			},
		},
		{
			Name:  "stop",
			Usage: "stop an instance",
			Action: func(c *cli.Context) {
				if len(c.Args()) != 1 {
					fmt.Println("usage: capstan stop [instance_name]")
					return
				}
				instance := c.Args()[0]
				cmd.Stop(instance)
			},
		},
		{
			Name:  "delete",
			Usage: "delete an instance",
			Action: func(c *cli.Context) {
				if len(c.Args()) != 1 {
					fmt.Println("usage: capstan delete [instance_name]")
					return
				}
				instance := c.Args()[0]
				cmd.Delete(instance)
			},
		},
	}
	app.Run(os.Args)
}
Ejemplo n.º 2
0
func Run(repo *util.Repo, config *RunConfig) error {
	var path string
	var cmd *exec.Cmd

	// Start an existing instance
	if config.ImageName == "" && config.InstanceName != "" {
		instanceName, instancePlatform := util.SearchInstance(config.InstanceName)
		if instanceName != "" {
			defer fmt.Println("")

			fmt.Printf("Created instance: %s\n", instanceName)
			// Do not set RawTerm for gce
			if instancePlatform != "gce" {
				util.RawTerm()
				defer util.ResetTerm()
			}

			var err error
			switch instancePlatform {
			case "qemu":
				c, err := qemu.LoadConfig(instanceName)
				if err != nil {
					return err
				}
				cmd, err = qemu.LaunchVM(c)
			case "vbox":
				c, err := vbox.LoadConfig(instanceName)
				if err != nil {
					return err
				}
				cmd, err = vbox.LaunchVM(c)
			case "vmw":
				c, err := vmw.LoadConfig(instanceName)
				if err != nil {
					return err
				}
				cmd, err = vmw.LaunchVM(c)
			case "gce":
				c, err := gce.LoadConfig(instanceName)
				if err != nil {
					return err
				}
				cmd, err = gce.LaunchVM(c)
			}

			if err != nil {
				return err
			}
			if cmd != nil {
				return cmd.Wait()
			}
			return nil
		} else {
			// The InstanceName is actually a ImageName
			// so, cmd like "capstan run cloudius/osv" will work
			config.ImageName = config.InstanceName
			config.InstanceName = strings.Replace(config.InstanceName, "/", "-", -1)
			return Run(repo, config)
		}
	} else if config.ImageName != "" && config.InstanceName != "" {
		// Both ImageName and InstanceName are specified
		if f, err := os.Stat(config.ImageName); (f != nil && f.IsDir()) || os.IsNotExist(err) {
			if repo.ImageExists(config.Hypervisor, config.ImageName) {
				path = repo.ImagePath(config.Hypervisor, config.ImageName)
			} else if image.IsCloudImage(config.ImageName) {
				path = config.ImageName
			} else {
				remote, err := util.IsRemoteImage(repo.URL, config.ImageName)
				if err != nil {
					return err
				}
				if remote {
					err := Pull(repo, config.Hypervisor, config.ImageName)
					if err != nil {
						return err
					}
					path = repo.ImagePath(config.Hypervisor, config.ImageName)
				} else {
					return fmt.Errorf("%s: no such image", config.ImageName)
				}
			}
			if config.Hypervisor == "gce" && !image.IsCloudImage(config.ImageName) {
				str, err := ioutil.ReadFile(path)
				if err != nil {
					return err
				}
				path = strings.Replace(string(str), "\n", "", -1)
			}
		} else {
			if strings.HasSuffix(config.ImageName, ".jar") {
				config, err = buildJarImage(repo, config)
				if err != nil {
					return err
				}
				path = repo.ImagePath(config.Hypervisor, config.ImageName)
			} else {
				path = config.ImageName
			}
		}
		deleteInstance(config.InstanceName)
	} else if config.ImageName == "" && config.InstanceName == "" {
		// Valid only when Capstanfile is present
		config.ImageName = repo.DefaultImage()
		config.InstanceName = config.ImageName
		if config.ImageName == "" {
			return fmt.Errorf("No Capstanfile found, unable to run.")
		}
		if !repo.ImageExists(config.Hypervisor, config.ImageName) {
			if !core.IsTemplateFile("Capstanfile") {
				return fmt.Errorf("%s: no such image", config.ImageName)
			}
			image := &core.Image{
				Name:       config.ImageName,
				Hypervisor: config.Hypervisor,
			}
			template, err := core.ReadTemplateFile("Capstanfile")
			if err != nil {
				return err
			}
			if err := Build(repo, image, template, config.Verbose, config.Memory); err != nil {
				return err
			}
		}
		path = repo.ImagePath(config.Hypervisor, config.ImageName)
		deleteInstance(config.InstanceName)
	} else {
		// Cmdline option is not valid
		usage()
		return nil
	}

	format, err := image.Probe(path)
	if err != nil {
		return err
	}
	if format == image.Unknown {
		return fmt.Errorf("%s: image format not recognized, unable to run it.", path)
	}
	size, err := util.ParseMemSize(config.Memory)
	if err != nil {
		return err
	}
	defer fmt.Println("")

	id := config.InstanceName
	fmt.Printf("Created instance: %s\n", id)
	// Do not set RawTerm for gce
	if config.Hypervisor != "gce" {
		util.RawTerm()
		defer util.ResetTerm()
	}

	switch config.Hypervisor {
	case "qemu":
		dir := filepath.Join(util.ConfigDir(), "instances/qemu", id)
		bridge := config.Bridge
		if bridge == "" {
			bridge = "virbr0"
		}
		config := &qemu.VMConfig{
			Name:        id,
			Image:       path,
			Verbose:     true,
			Memory:      size,
			Cpus:        config.Cpus,
			Networking:  config.Networking,
			Bridge:      bridge,
			NatRules:    config.NatRules,
			BackingFile: true,
			InstanceDir: dir,
			Monitor:     filepath.Join(dir, "osv.monitor"),
			ConfigFile:  filepath.Join(dir, "osv.config"),
			MAC:         config.MAC,
		}
		cmd, err = qemu.LaunchVM(config)
	case "vbox":
		if format != image.VDI && format != image.VMDK {
			return fmt.Errorf("%s: image format of %s is not supported, unable to run it.", config.Hypervisor, path)
		}
		dir := filepath.Join(util.ConfigDir(), "instances/vbox", id)
		bridge := config.Bridge
		if bridge == "" {
			bridge = "vboxnet0"
		}
		config := &vbox.VMConfig{
			Name:       id,
			Dir:        filepath.Join(util.ConfigDir(), "instances/vbox"),
			Image:      path,
			Memory:     size,
			Cpus:       config.Cpus,
			Networking: config.Networking,
			Bridge:     bridge,
			NatRules:   config.NatRules,
			ConfigFile: filepath.Join(dir, "osv.config"),
			MAC:        config.MAC,
		}
		cmd, err = vbox.LaunchVM(config)
	case "gce":
		if format != image.GCE_TARBALL && format != image.GCE_GS {
			return fmt.Errorf("%s: image format of %s is not supported, unable to run it.", config.Hypervisor, path)
		}
		dir := filepath.Join(util.ConfigDir(), "instances/gce", id)
		c := &gce.VMConfig{
			Name:        id,
			Image:       id,
			Network:     "default",
			MachineType: "n1-standard-1",
			Zone:        "us-central1-a",
			ConfigFile:  filepath.Join(dir, "osv.config"),
			InstanceDir: dir,
		}
		if format == image.GCE_TARBALL {
			c.CloudStoragePath = strings.TrimSuffix(config.GCEUploadDir, "/") + "/" + id + ".tar.gz"
			c.Tarball = path
		} else {
			c.CloudStoragePath = path
			c.Tarball = ""
		}
		cmd, err = gce.LaunchVM(c)
	case "vmw":
		if format != image.VMDK {
			return fmt.Errorf("%s: image format of %s is not supported, unable to run it.", config.Hypervisor, path)
		}
		dir := filepath.Join(util.ConfigDir(), "instances/vmw", id)
		config := &vmw.VMConfig{
			Name:         id,
			Dir:          dir,
			Image:        filepath.Join(dir, "osv.vmdk"),
			Memory:       size,
			Cpus:         config.Cpus,
			NatRules:     config.NatRules,
			VMXFile:      filepath.Join(dir, "osv.vmx"),
			InstanceDir:  dir,
			OriginalVMDK: path,
			ConfigFile:   filepath.Join(dir, "osv.config"),
		}
		cmd, err = vmw.LaunchVM(config)
	default:
		err = fmt.Errorf("%s: is not a supported hypervisor", config.Hypervisor)
	}
	if err != nil {
		return err
	}
	if cmd != nil {
		return cmd.Wait()
	} else {
		return nil
	}
}