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create.go
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create.go
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package daemon
import (
"github.com/Sirupsen/logrus"
"github.com/docker/docker/container"
derr "github.com/docker/docker/errors"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/stringid"
volumestore "github.com/docker/docker/volume/store"
"github.com/docker/engine-api/types"
containertypes "github.com/docker/engine-api/types/container"
networktypes "github.com/docker/engine-api/types/network"
"github.com/opencontainers/runc/libcontainer/label"
)
// ContainerCreate creates a container.
func (daemon *Daemon) ContainerCreate(params types.ContainerCreateConfig) (types.ContainerCreateResponse, error) {
if params.Config == nil {
return types.ContainerCreateResponse{}, derr.ErrorCodeEmptyConfig
}
warnings, err := daemon.verifyContainerSettings(params.HostConfig, params.Config)
if err != nil {
return types.ContainerCreateResponse{Warnings: warnings}, err
}
if params.HostConfig == nil {
params.HostConfig = &containertypes.HostConfig{}
}
err = daemon.adaptContainerSettings(params.HostConfig, params.AdjustCPUShares)
if err != nil {
return types.ContainerCreateResponse{Warnings: warnings}, err
}
container, err := daemon.create(params)
if err != nil {
return types.ContainerCreateResponse{Warnings: warnings}, daemon.imageNotExistToErrcode(err)
}
return types.ContainerCreateResponse{ID: container.ID, Warnings: warnings}, nil
}
// Create creates a new container from the given configuration with a given name.
func (daemon *Daemon) create(params types.ContainerCreateConfig) (retC *container.Container, retErr error) {
var (
container *container.Container
img *image.Image
imgID image.ID
err error
)
if params.Config.Image != "" {
img, err = daemon.GetImage(params.Config.Image)
if err != nil {
return nil, err
}
imgID = img.ID()
}
if err := daemon.mergeAndVerifyConfig(params.Config, img); err != nil {
return nil, err
}
if container, err = daemon.newContainer(params.Name, params.Config, imgID); err != nil {
return nil, err
}
defer func() {
if retErr != nil {
if err := daemon.ContainerRm(container.ID, &types.ContainerRmConfig{ForceRemove: true}); err != nil {
logrus.Errorf("Clean up Error! Cannot destroy container %s: %v", container.ID, err)
}
}
}()
if err := daemon.setSecurityOptions(container, params.HostConfig); err != nil {
return nil, err
}
// Set RWLayer for container after mount labels have been set
if err := daemon.setRWLayer(container); err != nil {
return nil, err
}
if err := daemon.Register(container); err != nil {
return nil, err
}
rootUID, rootGID, err := idtools.GetRootUIDGID(daemon.uidMaps, daemon.gidMaps)
if err != nil {
return nil, err
}
if err := idtools.MkdirAs(container.Root, 0700, rootUID, rootGID); err != nil {
return nil, err
}
if err := daemon.setHostConfig(container, params.HostConfig); err != nil {
return nil, err
}
defer func() {
if retErr != nil {
if err := daemon.removeMountPoints(container, true); err != nil {
logrus.Error(err)
}
}
}()
if err := daemon.createContainerPlatformSpecificSettings(container, params.Config, params.HostConfig, img); err != nil {
return nil, err
}
var endpointsConfigs map[string]*networktypes.EndpointSettings
if params.NetworkingConfig != nil {
endpointsConfigs = params.NetworkingConfig.EndpointsConfig
}
if err := daemon.updateContainerNetworkSettings(container, endpointsConfigs); err != nil {
return nil, err
}
if err := container.ToDiskLocking(); err != nil {
logrus.Errorf("Error saving new container to disk: %v", err)
return nil, err
}
daemon.LogContainerEvent(container, "create")
return container, nil
}
func (daemon *Daemon) generateSecurityOpt(ipcMode containertypes.IpcMode, pidMode containertypes.PidMode) ([]string, error) {
if ipcMode.IsHost() || pidMode.IsHost() {
return label.DisableSecOpt(), nil
}
if ipcContainer := ipcMode.Container(); ipcContainer != "" {
c, err := daemon.GetContainer(ipcContainer)
if err != nil {
return nil, err
}
return label.DupSecOpt(c.ProcessLabel), nil
}
return nil, nil
}
func (daemon *Daemon) setRWLayer(container *container.Container) error {
var layerID layer.ChainID
if container.ImageID != "" {
img, err := daemon.imageStore.Get(container.ImageID)
if err != nil {
return err
}
layerID = img.RootFS.ChainID()
}
rwLayer, err := daemon.layerStore.CreateRWLayer(container.ID, layerID, container.MountLabel, daemon.setupInitLayer)
if err != nil {
return err
}
container.RWLayer = rwLayer
return nil
}
// VolumeCreate creates a volume with the specified name, driver, and opts
// This is called directly from the remote API
func (daemon *Daemon) VolumeCreate(name, driverName string, opts map[string]string) (*types.Volume, error) {
if name == "" {
name = stringid.GenerateNonCryptoID()
}
v, err := daemon.volumes.Create(name, driverName, opts)
if err != nil {
if volumestore.IsNameConflict(err) {
return nil, derr.ErrorVolumeNameTaken.WithArgs(name)
}
return nil, err
}
daemon.LogVolumeEvent(v.Name(), "create", map[string]string{"driver": v.DriverName()})
return volumeToAPIType(v), nil
}