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Decouple daemon and container to export containers.

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Signed-off-by: David Calavera <david.calavera@gmail.com>
This commit is contained in:
David Calavera 2015-11-02 18:53:26 -05:00
parent 9f79cfdb2f
commit 1c94f5f53a
2 changed files with 27 additions and 25 deletions
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24
daemon/container.go
View file

@ -356,30 +356,6 @@ func (container *Container) Resize(h, w int) error {
return nil
}
func (container *Container) export() (archive.Archive, error) {
if err := container.Mount(); err != nil {
return nil, err
}
uidMaps, gidMaps := container.daemon.GetUIDGIDMaps()
archive, err := archive.TarWithOptions(container.basefs, &archive.TarOptions{
Compression: archive.Uncompressed,
UIDMaps: uidMaps,
GIDMaps: gidMaps,
})
if err != nil {
container.Unmount()
return nil, err
}
arch := ioutils.NewReadCloserWrapper(archive, func() error {
err := archive.Close()
container.Unmount()
return err
})
container.logEvent("export")
return arch, err
}
// Mount sets container.basefs
func (container *Container) Mount() error {
return container.daemon.Mount(container)

28
daemon/export.go
View file

@ -4,6 +4,8 @@ import (
"io"
derr "github.com/docker/docker/errors"
"github.com/docker/docker/pkg/archive"
"github.com/docker/docker/pkg/ioutils"
)
// ContainerExport writes the contents of the container to the given
@ -14,7 +16,7 @@ func (daemon *Daemon) ContainerExport(name string, out io.Writer) error {
return err
}
data, err := container.export()
data, err := daemon.containerExport(container)
if err != nil {
return derr.ErrorCodeExportFailed.WithArgs(name, err)
}
@ -26,3 +28,27 @@ func (daemon *Daemon) ContainerExport(name string, out io.Writer) error {
}
return nil
}
func (daemon *Daemon) containerExport(container *Container) (archive.Archive, error) {
if err := daemon.Mount(container); err != nil {
return nil, err
}
uidMaps, gidMaps := daemon.GetUIDGIDMaps()
archive, err := archive.TarWithOptions(container.basefs, &archive.TarOptions{
Compression: archive.Uncompressed,
UIDMaps: uidMaps,
GIDMaps: gidMaps,
})
if err != nil {
daemon.unmount(container)
return nil, err
}
arch := ioutils.NewReadCloserWrapper(archive, func() error {
err := archive.Close()
container.Unmount()
return err
})
daemon.logContainerEvent(container, "export")
return arch, err
}