Ejemplo n.º 1
0
func createContainer(context *cli.Context, id string, spec *specs.Spec) (libcontainer.Container, error) {
	config, err := specconv.CreateLibcontainerConfig(&specconv.CreateOpts{
		CgroupName:       id,
		UseSystemdCgroup: context.GlobalBool("systemd-cgroup"),
		NoPivotRoot:      context.Bool("no-pivot"),
		NoNewKeyring:     context.Bool("no-new-keyring"),
		Spec:             spec,
	})
	if err != nil {
		return nil, err
	}

	if _, err := os.Stat(config.Rootfs); err != nil {
		if os.IsNotExist(err) {
			return nil, fmt.Errorf("rootfs (%q) does not exist", config.Rootfs)
		}
		return nil, err
	}

	factory, err := loadFactory(context)
	if err != nil {
		return nil, err
	}
	return factory.Create(id, config)
}
Ejemplo n.º 2
0
// startContainer starts the container. Returns the exit status or -1 and an
// error. Signals sent to the current process will be forwarded to container.
func startContainer(spec *specs.Spec, id, pidFile string, detach, useSystemdCgroup bool) (int, error) {
	// create the libcontainer config
	config, err := specconv.CreateLibcontainerConfig(&specconv.CreateOpts{
		CgroupName:       id,
		UseSystemdCgroup: useSystemdCgroup,
		NoPivotRoot:      false,
		Spec:             spec,
	})
	if err != nil {
		return -1, err
	}

	if _, err := os.Stat(config.Rootfs); err != nil {
		if os.IsNotExist(err) {
			return -1, fmt.Errorf("rootfs (%q) does not exist", config.Rootfs)
		}
		return -1, err
	}

	factory, err := loadFactory(useSystemdCgroup)
	if err != nil {
		return -1, err
	}

	container, err := factory.Create(id, config)
	if err != nil {
		return -1, err
	}

	// Support on-demand socket activation by passing file descriptors into the container init process.
	listenFDs := []*os.File{}
	if os.Getenv("LISTEN_FDS") != "" {
		listenFDs = activation.Files(false)
	}

	r := &runner{
		enableSubreaper: true,
		shouldDestroy:   true,
		container:       container,
		console:         console,
		detach:          detach,
		pidFile:         pidFile,
		listenFDs:       listenFDs,
	}
	return r.run(&spec.Process)
}
Ejemplo n.º 3
0
func createContainer(context *cli.Context, id string, spec *specs.Spec) (libcontainer.Container, error) {
	config, err := specconv.CreateLibcontainerConfig(&specconv.CreateOpts{
		CgroupName:       id,
		UseSystemdCgroup: context.GlobalBool("systemd-cgroup"),
		NoPivotRoot:      context.Bool("no-pivot"),
		NoNewKeyring:     context.Bool("no-new-keyring"),
		Spec:             spec,
	})
	if err != nil {
		return nil, err
	}

	factory, err := loadFactory(context)
	if err != nil {
		return nil, err
	}
	return factory.Create(id, config)
}
Ejemplo n.º 4
0
func loadConfig(path string) (*configs.Config, error) {
	f, err := os.Open(path)
	if err != nil {
		if os.IsNotExist(err) {
			return nil, fmt.Errorf("JSON specification file %s not found", path)
		}
		return nil, err
	}
	defer f.Close()
	var spec *specs.Spec
	if err = json.NewDecoder(f).Decode(&spec); err != nil {
		return nil, err
	}

	var config *configs.Config
	config, err = specconv.CreateLibcontainerConfig(&specconv.CreateOpts{
		CgroupName:       "",
		UseSystemdCgroup: false,
		NoPivotRoot:      true,
		NoNewKeyring:     true,
		Spec:             spec,
	})
	return config, nil
}
Ejemplo n.º 5
0
		if imagePath == "" {
			imagePath = getDefaultImagePath(context)
		}
		bundle := context.String("bundle")
		if bundle != "" {
			if err := os.Chdir(bundle); err != nil {
				return err
			}
		}
		spec, err := loadSpec(specConfig)
		if err != nil {
			return err
		}
		config, err := specconv.CreateLibcontainerConfig(&specconv.CreateOpts{
			CgroupName:       id,
			UseSystemdCgroup: context.GlobalBool("systemd-cgroup"),
			NoPivotRoot:      context.Bool("no-pivot"),
			Spec:             spec,
		})
		if err != nil {
			return err
		}
		status, err := restoreContainer(context, spec, config, imagePath)
		if err == nil {
			os.Exit(status)
		}
		return err
	},
}

func restoreContainer(context *cli.Context, spec *specs.Spec, config *configs.Config, imagePath string) (code int, err error) {
	var (