use hypervisor.BootConfig for factories' arguements

make it easier to pass pc-lite, dax, tempalte, vsocks
configurations to the hypervisor driver(qemu/libvirt...).

Signed-off-by: Lai Jiangshan <jiangshanlai@gmail.com>

Author: laijs

containerd/containerd.go

@@ -104,8 +104,8 @@ var ContainerdCommand = cli.Command{
 			f.Close()
 
 			if (driver != "" && driver != tconfig.Driver) ||
-				(kernel != "" && kernel != tconfig.Kernel) ||
-				(initrd != "" && initrd != tconfig.Initrd) {
+				(kernel != "" && kernel != tconfig.Config.Kernel) ||
+				(initrd != "" && initrd != tconfig.Config.Initrd) {
 				glog.Warningf("template config is not match the driver, kernel or initrd argument, disable template")
 				template = ""
 			} else if driver == "" {
@@ -127,7 +127,12 @@ var ContainerdCommand = cli.Command{
 		if template != "" {
 			f = singlefactory.New(templatefactory.NewFromExisted(tconfig))
 		} else {
-			f = factory.NewFromConfigs(kernel, initrd, vsock, nil)
+			bootConfig := hypervisor.BootConfig{
+				Kernel:      kernel,
+				Initrd:      initrd,
+				EnableVsock: vsock,
+			}
+			f = singlefactory.Dummy(bootConfig)
 		}
 		sv, err := supervisor.New(stateDir, containerdDir, f,
 			context.GlobalInt("default_cpus"), context.GlobalInt("default_memory"))

factory/direct/direct.go

@@ -10,14 +10,7 @@ type directFactory struct {
 	config hypervisor.BootConfig
 }
 
-func New(cpu, mem int, kernel, initrd string, vsock bool) base.Factory {
-	b := hypervisor.BootConfig{
-		CPU:         cpu,
-		Memory:      mem,
-		EnableVsock: vsock,
-		Kernel:      kernel,
-		Initrd:      initrd,
-	}
+func New(b hypervisor.BootConfig) base.Factory {
 	return &directFactory{config: b}
 }
 

factory/factory.go

@@ -30,21 +30,23 @@ type FactoryConfig struct {
 	Memory   int  `json:"memory"`
 }
 
-func NewFromConfigs(kernel, initrd string, vsock bool, configs []FactoryConfig) Factory {
+func NewFromConfigs(bootConfig hypervisor.BootConfig, configs []FactoryConfig) Factory {
 	bases := make([]base.Factory, len(configs))
 	for i, c := range configs {
 		var b base.Factory
+		boot := bootConfig
+		boot.CPU = c.Cpu
+		boot.Memory = c.Memory
 		if c.Template {
-			b = template.New(filepath.Join(hypervisor.BaseDir, "template"), c.Cpu, c.Memory, kernel, initrd, vsock)
+			b = template.New(filepath.Join(hypervisor.BaseDir, "template"), boot)
 		} else {
-			b = direct.New(c.Cpu, c.Memory, kernel, initrd, vsock)
+			b = direct.New(boot)
 		}
 		bases[i] = cache.New(c.Cache, b)
 	}
 
 	if len(bases) == 0 {
-		// skip GetVm from the base factory
-		return single.New(direct.New(1000000, 1000000, kernel, initrd, vsock))
+		return single.Dummy(bootConfig)
 	} else if len(bases) == 1 {
 		return single.New(bases[0])
 	} else {
@@ -54,12 +56,12 @@ func NewFromConfigs(kernel, initrd string, vsock bool, configs []FactoryConfig)
 
 // vmFactoryPolicy = [FactoryConfig,]*FactoryConfig
 // FactoryConfig   = {["cache":NUMBER,]["template":true|false,]"cpu":NUMBER,"memory":NUMBER}
-func NewFromPolicy(kernel, initrd string, vsock bool, policy string) Factory {
+func NewFromPolicy(bootConfig hypervisor.BootConfig, policy string) Factory {
 	var configs []FactoryConfig
 	jsonString := "[" + policy + "]"
 	err := json.Unmarshal([]byte(jsonString), &configs)
 	if err != nil && policy != "none" {
 		glog.Errorf("Incorrect policy: %s", policy)
 	}
-	return NewFromConfigs(kernel, initrd, vsock, configs)
+	return NewFromConfigs(bootConfig, configs)
 }

factory/multi/multi.go

@@ -17,7 +17,8 @@ func (f Factory) GetVm(cpu, mem int) (*hypervisor.Vm, error) {
 			return single.New(b).GetVm(cpu, mem)
 		}
 	}
-	return single.New(f[0]).GetVm(cpu, mem)
+	boot := *f[0].Config()
+	return single.Dummy(boot).GetVm(cpu, mem)
 }
 
 func (f Factory) CloseFactory() {

factory/single/single.go

@@ -16,15 +16,8 @@ func (f Factory) GetVm(cpu, mem int) (*hypervisor.Vm, error) {
 	// check if match the base
 	config := f.Config()
 	if config.CPU > cpu || config.Memory > mem {
-		// also strip unrelated option from @config
-		boot := &hypervisor.BootConfig{
-			CPU:         cpu,
-			Memory:      mem,
-			Kernel:      config.Kernel,
-			Initrd:      config.Initrd,
-			EnableVsock: config.EnableVsock,
-		}
-		return hypervisor.GetVm("", boot, false)
+		boot := *config
+		return Dummy(boot).GetVm(cpu, mem)
 	}
 
 	vm, err := f.GetBaseVm()
@@ -59,3 +52,13 @@ func (f Factory) GetVm(cpu, mem int) (*hypervisor.Vm, error) {
 	}
 	return vm, err
 }
+
+type Dummy hypervisor.BootConfig
+
+func (f Dummy) GetVm(cpu, mem int) (*hypervisor.Vm, error) {
+	config := hypervisor.BootConfig(f)
+	config.CPU = cpu
+	config.Memory = mem
+	return hypervisor.GetVm("", &config, false)
+}
+func (f Dummy) CloseFactory() {}

factory/template/template.go

@@ -17,7 +17,7 @@ type templateFactory struct {
 	s *template.TemplateVmConfig
 }
 
-func New(templateRoot string, cpu, mem int, kernel, initrd string, vsock bool) base.Factory {
+func New(templateRoot string, b hypervisor.BootConfig) base.Factory {
 	var vmName string
 
 	for {
@@ -26,11 +26,11 @@ func New(templateRoot string, cpu, mem int, kernel, initrd string, vsock bool) b
 			break
 		}
 	}
-	s, err := template.CreateTemplateVM(filepath.Join(templateRoot, vmName), vmName, cpu, mem, kernel, initrd, vsock)
+	s, err := template.CreateTemplateVM(filepath.Join(templateRoot, vmName), vmName, b)
 	if err != nil {
 		glog.Errorf("failed to create template factory: %v", err)
 		glog.V(3).Infof("use direct factory instead")
-		return direct.New(cpu, mem, kernel, initrd, vsock)
+		return direct.New(b)
 	}
 	return &templateFactory{s: s}
 }

manage.go

@@ -80,7 +80,14 @@ var createTemplateCommand = cli.Command{
 			os.Exit(-1)
 		}
 
-		if _, err := templatecore.CreateTemplateVM(template, "", context.Int("cpu"), context.Int("mem"), kernel, initrd, context.GlobalBool("vsock")); err != nil {
+		boot := hypervisor.BootConfig{
+			CPU:         context.Int("cpu"),
+			Memory:      context.Int("mem"),
+			Kernel:      kernel,
+			Initrd:      initrd,
+			EnableVsock: context.GlobalBool("vsock"),
+		}
+		if _, err := templatecore.CreateTemplateVM(template, "", boot); err != nil {
 			fmt.Printf("Failed to create the template: %v\n", err)
 			os.Exit(-1)
 		}

template/template.go

@@ -26,16 +26,26 @@ import (
 type TemplateVmConfig struct {
 	StatePath string `json:"statepath"`
 	Driver    string `json:"driver"`
-	Cpu       int    `json:"cpu"`
-	Memory    int    `json:"memory"`
-	Kernel    string `json:"kernel"`
-	Initrd    string `json:"initrd"`
+	Config    hypervisor.BootConfig
 }
 
-func CreateTemplateVM(statePath, vmName string, cpu, mem int, kernel, initrd string, vsock bool) (t *TemplateVmConfig, err error) {
+func CreateTemplateVM(statePath, vmName string, b hypervisor.BootConfig) (t *TemplateVmConfig, err error) {
+	if b.BootToBeTemplate || b.BootFromTemplate || b.MemoryPath != "" || b.DevicesStatePath != "" {
+		return nil, fmt.Errorf("Error boot config for template")
+	}
+	b.MemoryPath = statePath + "/memory"
+	b.DevicesStatePath = statePath + "/state"
+
+	config := &TemplateVmConfig{
+		StatePath: statePath,
+		Driver:    hypervisor.HDriver.Name(),
+		Config:    b,
+	}
+	config.Config.BootFromTemplate = true
+
 	defer func() {
 		if err != nil {
-			(&TemplateVmConfig{StatePath: statePath}).Destroy()
+			config.Destroy()
 		}
 	}()
 
@@ -45,7 +55,7 @@ func CreateTemplateVM(statePath, vmName string, cpu, mem int, kernel, initrd str
 		return nil, err
 	}
 	flags := uintptr(syscall.MS_NOSUID | syscall.MS_NODEV)
-	opts := fmt.Sprintf("size=%dM", mem+8)
+	opts := fmt.Sprintf("size=%dM", b.Memory+8)
 	if err = syscall.Mount("tmpfs", statePath, "tmpfs", flags, opts); err != nil {
 		glog.Infof("mount template state path failed: %v", err)
 		return nil, err
@@ -58,18 +68,8 @@ func CreateTemplateVM(statePath, vmName string, cpu, mem int, kernel, initrd str
 	}
 
 	// launch vm
-	b := &hypervisor.BootConfig{
-		CPU:              cpu,
-		Memory:           mem,
-		BootToBeTemplate: true,
-		BootFromTemplate: false,
-		EnableVsock:      vsock,
-		MemoryPath:       statePath + "/memory",
-		DevicesStatePath: statePath + "/state",
-		Kernel:           kernel,
-		Initrd:           initrd,
-	}
-	vm, err := hypervisor.GetVm(vmName, b, true)
+	b.BootToBeTemplate = true
+	vm, err := hypervisor.GetVm(vmName, &b, true)
 	if err != nil {
 		return nil, err
 	}
@@ -89,15 +89,6 @@ func CreateTemplateVM(statePath, vmName string, cpu, mem int, kernel, initrd str
 	// so we wait here. We should fix it in the qemu driver side.
 	time.Sleep(1 * time.Second)
 
-	config := &TemplateVmConfig{
-		StatePath: statePath,
-		Driver:    hypervisor.HDriver.Name(),
-		Cpu:       cpu,
-		Memory:    mem,
-		Kernel:    kernel,
-		Initrd:    initrd,
-	}
-
 	configData, err := json.MarshalIndent(config, "", "\t")
 	if err != nil {
 		glog.V(1).Infof("%s\n", err.Error())
@@ -114,16 +105,8 @@ func CreateTemplateVM(statePath, vmName string, cpu, mem int, kernel, initrd str
 }
 
 func (t *TemplateVmConfig) BootConfigFromTemplate() *hypervisor.BootConfig {
-	return &hypervisor.BootConfig{
-		CPU:              t.Cpu,
-		Memory:           t.Memory,
-		BootToBeTemplate: false,
-		BootFromTemplate: true,
-		MemoryPath:       t.StatePath + "/memory",
-		DevicesStatePath: t.StatePath + "/state",
-		Kernel:           t.Kernel,
-		Initrd:           t.Initrd,
-	}
+	b := t.Config
+	return &b
 }
 
 // boot vm from template, the returned vm is paused