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moby--moby/daemon/create_unix.go
Tibor Vass 53d2e5e9d7 Merge pull request #21270 from ehazlett/resource-labels
Add Label support for Images (build), Networks and Volumes on Creation
2016-03-22 15:12:33 -04:00

76 lines
2.2 KiB
Go

// +build !windows
package daemon
import (
"fmt"
"os"
"path/filepath"
"github.com/Sirupsen/logrus"
"github.com/docker/docker/container"
"github.com/docker/docker/pkg/stringid"
containertypes "github.com/docker/engine-api/types/container"
"github.com/opencontainers/runc/libcontainer/label"
)
// createContainerPlatformSpecificSettings performs platform specific container create functionality
func (daemon *Daemon) createContainerPlatformSpecificSettings(container *container.Container, config *containertypes.Config, hostConfig *containertypes.HostConfig) error {
if err := daemon.Mount(container); err != nil {
return err
}
defer daemon.Unmount(container)
rootUID, rootGID := daemon.GetRemappedUIDGID()
if err := container.SetupWorkingDirectory(rootUID, rootGID); err != nil {
return err
}
for spec := range config.Volumes {
name := stringid.GenerateNonCryptoID()
destination := filepath.Clean(spec)
// Skip volumes for which we already have something mounted on that
// destination because of a --volume-from.
if container.IsDestinationMounted(destination) {
continue
}
path, err := container.GetResourcePath(destination)
if err != nil {
return err
}
stat, err := os.Stat(path)
if err == nil && !stat.IsDir() {
return fmt.Errorf("cannot mount volume over existing file, file exists %s", path)
}
v, err := daemon.volumes.CreateWithRef(name, hostConfig.VolumeDriver, container.ID, nil, nil)
if err != nil {
return err
}
if err := label.Relabel(v.Path(), container.MountLabel, true); err != nil {
return err
}
container.AddMountPointWithVolume(destination, v, true)
}
return daemon.populateVolumes(container)
}
// populateVolumes copies data from the container's rootfs into the volume for non-binds.
// this is only called when the container is created.
func (daemon *Daemon) populateVolumes(c *container.Container) error {
for _, mnt := range c.MountPoints {
if !mnt.CopyData || mnt.Volume == nil {
continue
}
logrus.Debugf("copying image data from %s:%s, to %s", c.ID, mnt.Destination, mnt.Name)
if err := c.CopyImagePathContent(mnt.Volume, mnt.Destination); err != nil {
return err
}
}
return nil
}