LCOW: Remove hard-coding

Signed-off-by: John Howard <jhoward@microsoft.com>

daemon/start_windows.go

@@ -9,6 +9,7 @@ import (
 	"github.com/docker/docker/container"
 	"github.com/docker/docker/layer"
 	"github.com/docker/docker/libcontainerd"
+	"github.com/jhowardmsft/opengcs/gogcs/client"
 	"golang.org/x/sys/windows/registry"
 )
 
@@ -142,6 +143,36 @@ func (daemon *Daemon) getLibcontainerdCreateOptions(container *container.Contain
 		}
 	}
 
+	// LCOW options.
+	if container.Platform == "linux" {
+		config := &client.Config{}
+		if err := config.GenerateDefault(daemon.configStore.GraphOptions); err != nil {
+			return nil, err
+		}
+		// Override from user-supplied options.
+		for k, v := range container.HostConfig.StorageOpt {
+			switch k {
+			case "lcow.kirdpath":
+				config.KirdPath = v
+			case "lcow.kernel":
+				config.KernelFile = v
+			case "lcow.initrd":
+				config.InitrdFile = v
+			case "lcow.vhdx":
+				config.Vhdx = v
+			case "lcow.bootparameters":
+				config.BootParameters = v
+			}
+		}
+		if err := config.Validate(); err != nil {
+			return nil, err
+		}
+		lcowOpts := &libcontainerd.LCOWOption{
+			Config: config,
+		}
+		createOptions = append(createOptions, lcowOpts)
+	}
+
 	// Now add the remaining options.
 	createOptions = append(createOptions, &libcontainerd.FlushOption{IgnoreFlushesDuringBoot: !container.HasBeenStartedBefore})
 	createOptions = append(createOptions, hvOpts)

libcontainerd/client_windows.go

@@ -16,6 +16,7 @@ import (
 
 	"github.com/Microsoft/hcsshim"
 	"github.com/docker/docker/pkg/sysinfo"
+	opengcs "github.com/jhowardmsft/opengcs/gogcs/client"
 	specs "github.com/opencontainers/runtime-spec/specs-go"
 	"github.com/sirupsen/logrus"
 )
@@ -289,8 +290,20 @@ func (clnt *client) createWindows(containerID string, checkpoint string, checkpo
 func (clnt *client) createLinux(containerID string, checkpoint string, checkpointDir string, spec specs.Spec, attachStdio StdioCallback, options ...CreateOption) error {
 	logrus.Debugf("libcontainerd: createLinux(): containerId %s ", containerID)
 
-	// TODO @jhowardmsft LCOW Support: This needs to be configurable, not hard-coded.
+	var layerOpt *LayerOption
-	// However, good-enough for the LCOW bring-up.
+	var lcowOpt *LCOWOption
+	for _, option := range options {
+		if layer, ok := option.(*LayerOption); ok {
+			layerOpt = layer
+		}
+		if lcow, ok := option.(*LCOWOption); ok {
+			lcowOpt = lcow
+		}
+	}
+	if lcowOpt == nil || lcowOpt.Config == nil {
+		return fmt.Errorf("lcow option must be supplied to the runtime")
+	}
+
 	configuration := &hcsshim.ContainerConfig{
 		HvPartition:   true,
 		Name:          containerID,
@@ -298,17 +311,18 @@ func (clnt *client) createLinux(containerID string, checkpoint string, checkpoin
 		ContainerType: "linux",
 		Owner:         defaultOwner,
 		TerminateOnLastHandleClosed: true,
-		HvRuntime: &hcsshim.HvRuntime{
-			ImagePath:       `c:\Program Files\Linux Containers`,
-			LinuxKernelFile: `bootx64.efi`,
-			LinuxInitrdFile: `initrd.img`,
-		},
 	}
 
-	var layerOpt *LayerOption
+	if lcowOpt.Config.ActualMode == opengcs.ModeActualVhdx {
-	for _, option := range options {
+		configuration.HvRuntime = &hcsshim.HvRuntime{
-		if l, ok := option.(*LayerOption); ok {
+			ImagePath: lcowOpt.Config.Vhdx,
-			layerOpt = l
+		}
+	} else {
+		configuration.HvRuntime = &hcsshim.HvRuntime{
+			ImagePath:           lcowOpt.Config.KirdPath,
+			LinuxKernelFile:     lcowOpt.Config.KernelFile,
+			LinuxInitrdFile:     lcowOpt.Config.InitrdFile,
+			LinuxBootParameters: lcowOpt.Config.BootParameters,
 		}
 	}
 

libcontainerd/container_windows.go

@@ -9,7 +9,6 @@ import (
 	"time"
 
 	"github.com/Microsoft/hcsshim"
-	"github.com/docker/docker/pkg/system"
 	"github.com/opencontainers/runtime-spec/specs-go"
 	"github.com/sirupsen/logrus"
 	"golang.org/x/sys/windows"
@@ -89,8 +88,8 @@ func (ctr *container) start(attachStdio StdioCallback) error {
 	}
 	createProcessParms.User = ctr.ociSpec.Process.User.Username
 
-	// LCOW requires the raw OCI spec passed through HCS and onwards to GCS for the utility VM.
+	// Linux containers requires the raw OCI spec passed through HCS and onwards to GCS for the utility VM.
-	if system.LCOWSupported() && ctr.ociSpec.Platform.OS == "linux" {
+	if ctr.ociSpec.Platform.OS == "linux" {
 		ociBuf, err := json.Marshal(ctr.ociSpec)
 		if err != nil {
 			return err

libcontainerd/types_windows.go

@@ -2,6 +2,7 @@ package libcontainerd
 
 import (
 	"github.com/Microsoft/hcsshim"
+	opengcs "github.com/jhowardmsft/opengcs/gogcs/client"
 	"github.com/opencontainers/runtime-spec/specs-go"
 )
 
@@ -25,6 +26,11 @@ type Stats hcsshim.Statistics
 // Resources defines updatable container resource values.
 type Resources struct{}
 
+// LCOWOption is a CreateOption required for LCOW configuration
+type LCOWOption struct {
+	Config *opengcs.Config
+}
+
 // ServicingOption is a CreateOption with a no-op application that signifies
 // the container needs to be used for a Windows servicing operation.
 type ServicingOption struct {

libcontainerd/utils_windows.go

@@ -44,3 +44,8 @@ func (s *NetworkEndpointsOption) Apply(interface{}) error {
 func (s *CredentialsOption) Apply(interface{}) error {
 	return nil
 }
+
+// Apply for the LCOW option is a no-op.
+func (s *LCOWOption) Apply(interface{}) error {
+	return nil
+}