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Windows: OCI HVRuntime and LayerPaths to options

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Signed-off-by: John Howard <jhoward@microsoft.com>
This commit is contained in:
John Howard 2016-09-19 14:47:48 -07:00
parent 511fd49402
commit a3aceeac50
6 changed files with 165 additions and 102 deletions
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65
daemon/oci_windows.go
View file

@ -1,16 +1,10 @@
package daemon
import (
"errors"
"fmt"
"os"
"path/filepath"
"syscall"
containertypes "github.com/docker/docker/api/types/container"
"github.com/docker/docker/container"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
"github.com/docker/docker/libcontainerd"
"github.com/docker/docker/libcontainerd/windowsoci"
"github.com/docker/docker/oci"
@ -30,11 +24,6 @@ func (daemon *Daemon) createSpec(c *container.Container) (*libcontainerd.Spec, e
return nil, err
}
img, err := daemon.imageStore.Get(c.ImageID)
if err != nil {
return nil, fmt.Errorf("Failed to graph.Get on ImageID %s - %s", c.ImageID, err)
}
// In base spec
s.Hostname = c.FullHostname()
@ -80,60 +69,6 @@ func (daemon *Daemon) createSpec(c *container.Container) (*libcontainerd.Spec, e
s.Root.Path = c.BaseFS
s.Root.Readonly = c.HostConfig.ReadonlyRootfs
// s.Windows.LayerFolder.
m, err := c.RWLayer.Metadata()
if err != nil {
return nil, fmt.Errorf("Failed to get layer metadata - %s", err)
}
s.Windows.LayerFolder = m["dir"]
// s.Windows.LayerPaths
var layerPaths []string
if img.RootFS != nil && img.RootFS.Type == image.TypeLayers {
// Get the layer path for each layer.
max := len(img.RootFS.DiffIDs)
for i := 1; i <= max; i++ {
img.RootFS.DiffIDs = img.RootFS.DiffIDs[:i]
path, err := layer.GetLayerPath(daemon.layerStore, img.RootFS.ChainID())
if err != nil {
return nil, fmt.Errorf("Failed to get layer path from graphdriver %s for ImageID %s - %s", daemon.layerStore, img.RootFS.ChainID(), err)
}
// Reverse order, expecting parent most first
layerPaths = append([]string{path}, layerPaths...)
}
}
s.Windows.LayerPaths = layerPaths
// Are we going to run as a Hyper-V container?
hv := false
if c.HostConfig.Isolation.IsDefault() {
// Container is set to use the default, so take the default from the daemon configuration
hv = daemon.defaultIsolation.IsHyperV()
} else {
// Container is requesting an isolation mode. Honour it.
hv = c.HostConfig.Isolation.IsHyperV()
}
if hv {
hvr := &windowsoci.WindowsHvRuntime{}
if img.RootFS != nil && img.RootFS.Type == image.TypeLayers {
// For TP5, the utility VM is part of the base layer.
// TODO-jstarks: Add support for separate utility VM images
// once it is decided how they can be stored.
uvmpath := filepath.Join(layerPaths[len(layerPaths)-1], "UtilityVM")
_, err = os.Stat(uvmpath)
if err != nil {
if os.IsNotExist(err) {
err = errors.New("container image does not contain a utility VM")
}
return nil, err
}
hvr.ImagePath = uvmpath
}
s.Windows.HvRuntime = hvr
}
// In s.Windows.Networking
// Connect all the libnetwork allocated networks to the container
var epList []string

48
daemon/start_windows.go
View file

@ -1,12 +1,60 @@
package daemon
import (
"fmt"
"path/filepath"
"github.com/docker/docker/container"
"github.com/docker/docker/layer"
"github.com/docker/docker/libcontainerd"
)
func (daemon *Daemon) getLibcontainerdCreateOptions(container *container.Container) (*[]libcontainerd.CreateOption, error) {
createOptions := []libcontainerd.CreateOption{}
// Are we going to run as a Hyper-V container?
hvOpts := &libcontainerd.HyperVIsolationOption{}
if container.HostConfig.Isolation.IsDefault() {
// Container is set to use the default, so take the default from the daemon configuration
hvOpts.IsHyperV = daemon.defaultIsolation.IsHyperV()
} else {
// Container is requesting an isolation mode. Honour it.
hvOpts.IsHyperV = container.HostConfig.Isolation.IsHyperV()
}
// Generate the layer folder of the layer options
layerOpts := &libcontainerd.LayerOption{}
m, err := container.RWLayer.Metadata()
if err != nil {
return nil, fmt.Errorf("failed to get layer metadata - %s", err)
}
if hvOpts.IsHyperV {
hvOpts.SandboxPath = filepath.Dir(m["dir"])
} else {
layerOpts.LayerFolderPath = m["dir"]
}
// Generate the layer paths of the layer options
img, err := daemon.imageStore.Get(container.ImageID)
if err != nil {
return nil, fmt.Errorf("failed to graph.Get on ImageID %s - %s", container.ImageID, err)
}
// Get the layer path for each layer.
max := len(img.RootFS.DiffIDs)
for i := 1; i <= max; i++ {
img.RootFS.DiffIDs = img.RootFS.DiffIDs[:i]
layerPath, err := layer.GetLayerPath(daemon.layerStore, img.RootFS.ChainID())
if err != nil {
return nil, fmt.Errorf("failed to get layer path from graphdriver %s for ImageID %s - %s", daemon.layerStore, img.RootFS.ChainID(), err)
}
// Reverse order, expecting parent most first
layerOpts.LayerPaths = append([]string{layerPath}, layerOpts.LayerPaths...)
}
// Now build the full set of options
createOptions = append(createOptions, &libcontainerd.FlushOption{IgnoreFlushesDuringBoot: !container.HasBeenStartedBefore})
createOptions = append(createOptions, hvOpts)
createOptions = append(createOptions, layerOpts)
return &createOptions, nil
}

114
libcontainerd/client_windows.go
View file

@ -4,6 +4,7 @@ import (
"errors"
"fmt"
"io"
"os"
"path/filepath"
"strings"
"syscall"
@ -36,20 +37,73 @@ const (
const defaultOwner = "docker"
// Create is the entrypoint to create a container from a spec, and if successfully
// created, start it too.
// created, start it too. Table below shows the fields required for HCS JSON calling parameters,
// where if not populated, is omitted.
// +-----------------+--------------------------------------------+--------------------------------------------+
// | | Isolation=Process | Isolation=Hyper-V |
// +-----------------+--------------------------------------------+--------------------------------------------+
// | VolumePath | \\?\\Volume{GUIDa} | |
// | LayerFolderPath | %root%\windowsfilter\containerID | |
// | Layers[] | ID=GUIDb;Path=%root%\windowsfilter\layerID | ID=GUIDb;Path=%root%\windowsfilter\layerID |
// | SandboxPath | | %root%\windowsfilter |
// | HvRuntime | | ImagePath=%root%\BaseLayerID\UtilityVM |
// +-----------------+--------------------------------------------+--------------------------------------------+
//
// Isolation=Process example:
//
// {
// "SystemType": "Container",
// "Name": "5e0055c814a6005b8e57ac59f9a522066e0af12b48b3c26a9416e23907698776",
// "Owner": "docker",
// "IsDummy": false,
// "VolumePath": "\\\\\\\\?\\\\Volume{66d1ef4c-7a00-11e6-8948-00155ddbef9d}",
// "IgnoreFlushesDuringBoot": true,
// "LayerFolderPath": "C:\\\\control\\\\windowsfilter\\\\5e0055c814a6005b8e57ac59f9a522066e0af12b48b3c26a9416e23907698776",
// "Layers": [{
// "ID": "18955d65-d45a-557b-bf1c-49d6dfefc526",
// "Path": "C:\\\\control\\\\windowsfilter\\\\65bf96e5760a09edf1790cb229e2dfb2dbd0fcdc0bf7451bae099106bfbfea0c"
// }],
// "HostName": "5e0055c814a6",
// "MappedDirectories": [],
// "HvPartition": false,
// "EndpointList": ["eef2649d-bb17-4d53-9937-295a8efe6f2c"],
// "Servicing": false
//}
//
// Isolation=Hyper-V example:
//
//{
// "SystemType": "Container",
// "Name": "475c2c58933b72687a88a441e7e0ca4bd72d76413c5f9d5031fee83b98f6045d",
// "Owner": "docker",
// "IsDummy": false,
// "IgnoreFlushesDuringBoot": true,
// "Layers": [{
// "ID": "18955d65-d45a-557b-bf1c-49d6dfefc526",
// "Path": "C:\\\\control\\\\windowsfilter\\\\65bf96e5760a09edf1790cb229e2dfb2dbd0fcdc0bf7451bae099106bfbfea0c"
// }],
// "HostName": "475c2c58933b",
// "MappedDirectories": [],
// "SandboxPath": "C:\\\\control\\\\windowsfilter",
// "HvPartition": true,
// "EndpointList": ["e1bb1e61-d56f-405e-b75d-fd520cefa0cb"],
// "HvRuntime": {
// "ImagePath": "C:\\\\control\\\\windowsfilter\\\\65bf96e5760a09edf1790cb229e2dfb2dbd0fcdc0bf7451bae099106bfbfea0c\\\\UtilityVM"
// },
// "Servicing": false
//}
func (clnt *client) Create(containerID string, checkpoint string, checkpointDir string, spec Spec, options ...CreateOption) error {
clnt.lock(containerID)
defer clnt.unlock(containerID)
logrus.Debugln("libcontainerd: client.Create() with spec", spec)
configuration := &hcsshim.ContainerConfig{
SystemType: "Container",
Name: containerID,
Owner: defaultOwner,
VolumePath: spec.Root.Path,
SystemType: "Container",
Name: containerID,
Owner: defaultOwner,
IgnoreFlushesDuringBoot: false,
LayerFolderPath: spec.Windows.LayerFolder,
HostName: spec.Hostname,
HvPartition: false,
}
if spec.Windows.Networking != nil {
@ -80,33 +134,45 @@ func (clnt *client) Create(containerID string, checkpoint string, checkpointDir
}
}
if spec.Windows.HvRuntime != nil {
configuration.VolumePath = "" // Always empty for Hyper-V containers
configuration.HvPartition = true
configuration.HvRuntime = &hcsshim.HvRuntime{
ImagePath: spec.Windows.HvRuntime.ImagePath,
}
}
if configuration.HvPartition {
configuration.SandboxPath = filepath.Dir(spec.Windows.LayerFolder)
} else {
configuration.VolumePath = spec.Root.Path
configuration.LayerFolderPath = spec.Windows.LayerFolder
}
var layerOpt *LayerOption
for _, option := range options {
if s, ok := option.(*ServicingOption); ok {
configuration.Servicing = s.IsServicing
continue
}
if s, ok := option.(*FlushOption); ok {
configuration.IgnoreFlushesDuringBoot = s.IgnoreFlushesDuringBoot
if f, ok := option.(*FlushOption); ok {
configuration.IgnoreFlushesDuringBoot = f.IgnoreFlushesDuringBoot
continue
}
if h, ok := option.(*HyperVIsolationOption); ok {
configuration.HvPartition = h.IsHyperV
configuration.SandboxPath = h.SandboxPath
continue
}
if l, ok := option.(*LayerOption); ok {
layerOpt = l
continue
}
}
for _, layerPath := range spec.Windows.LayerPaths {
// We must have a layer option with at least one path
if layerOpt == nil || layerOpt.LayerPaths == nil {
return fmt.Errorf("no layer option or paths were supplied to the runtime")
}
if configuration.HvPartition {
// Make sure the Utility VM image is present in the base layer directory.
// TODO @swernli/jhowardmsft at some point post RS1 this may be re-locatable.
configuration.HvRuntime = &hcsshim.HvRuntime{ImagePath: filepath.Join(layerOpt.LayerPaths[len(layerOpt.LayerPaths)-1], "UtilityVM")}
if _, err := os.Stat(configuration.HvRuntime.ImagePath); os.IsNotExist(err) {
return fmt.Errorf("utility VM image '%s' could not be found", configuration.HvRuntime.ImagePath)
}
} else {
configuration.VolumePath = spec.Root.Path
configuration.LayerFolderPath = layerOpt.LayerFolderPath
}
for _, layerPath := range layerOpt.LayerPaths {
_, filename := filepath.Split(layerPath)
g, err := hcsshim.NameToGuid(filename)
if err != nil {

16
libcontainerd/types_windows.go
View file

@ -45,6 +45,22 @@ type FlushOption struct {
IgnoreFlushesDuringBoot bool
}
// HyperVIsolationOption is a CreateOption that indicates whether the runtime
// should start the container as a Hyper-V container, and if so, the sandbox path.
type HyperVIsolationOption struct {
IsHyperV bool
SandboxPath string `json:",omitempty"`
}
// LayerOption is a CreateOption that indicates to the runtime the layer folder
// and layer paths for a container.
type LayerOption struct {
// LayerFolder is the path to the current layer folder. Empty for Hyper-V containers.
LayerFolderPath string `json:",omitempty"`
// Layer paths of the parent layers
LayerPaths []string
}
// Checkpoint holds the details of a checkpoint (not supported in windows)
type Checkpoint struct {
Name string

12
libcontainerd/utils_windows.go
View file

@ -21,6 +21,16 @@ func (s *ServicingOption) Apply(interface{}) error {
}
// Apply for the flush option is a no-op.
func (s *FlushOption) Apply(interface{}) error {
func (f *FlushOption) Apply(interface{}) error {
return nil
}
// Apply for the hypervisolation option is a no-op.
func (h *HyperVIsolationOption) Apply(interface{}) error {
return nil
}
// Apply for the layer option is a no-op.
func (h *LayerOption) Apply(interface{}) error {
return nil
}

12
libcontainerd/windowsoci/oci_windows.go
View file

@ -39,12 +39,6 @@ type Windows struct {
Resources *WindowsResources `json:"resources,omitempty"`
// Networking contains the platform specific network settings for the container.
Networking *WindowsNetworking `json:"networking,omitempty"`
// LayerFolder is the path to the current layer folder
LayerFolder string `json:"layer_folder,omitempty"`
// Layer paths of the parent layers
LayerPaths []string `json:"layer_paths,omitempty"`
// HvRuntime contains settings specific to Hyper-V containers, omitted if not using Hyper-V isolation
HvRuntime *WindowsHvRuntime `json:"hv_runtime,omitempty"`
}
// Process contains information to start a specific application inside the container.
@ -122,12 +116,6 @@ type Mount struct {
Options []string `json:"options,omitempty"`
}
// WindowsHvRuntime contains settings specific to Hyper-V containers
type WindowsHvRuntime struct {
// ImagePath is the path to the Utility VM image for this container
ImagePath string `json:"image_path,omitempty"`
}
// WindowsNetworking contains the platform specific network settings for the container
type WindowsNetworking struct {
// List of endpoints to be attached to the container