0f871f8cb7
Define consts for the Actions we use for events, instead of "ad-hoc" strings. Having these consts makes it easier to find where specific events are triggered, makes the events less error-prone, and allows documenting each Action (if needed). Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
64 lines
1.8 KiB
Go
64 lines
1.8 KiB
Go
package daemon // import "github.com/docker/docker/daemon"
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"io"
|
|
|
|
"github.com/docker/docker/api/types/events"
|
|
"github.com/docker/docker/container"
|
|
"github.com/docker/docker/errdefs"
|
|
"github.com/docker/docker/pkg/archive"
|
|
"github.com/docker/docker/pkg/chrootarchive"
|
|
)
|
|
|
|
// ContainerExport writes the contents of the container to the given
|
|
// writer. An error is returned if the container cannot be found.
|
|
func (daemon *Daemon) ContainerExport(ctx context.Context, name string, out io.Writer) error {
|
|
ctr, err := daemon.GetContainer(name)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if isWindows && ctr.OS == "windows" {
|
|
return fmt.Errorf("the daemon on this operating system does not support exporting Windows containers")
|
|
}
|
|
|
|
if ctr.IsDead() {
|
|
err := fmt.Errorf("You cannot export container %s which is Dead", ctr.ID)
|
|
return errdefs.Conflict(err)
|
|
}
|
|
|
|
if ctr.IsRemovalInProgress() {
|
|
err := fmt.Errorf("You cannot export container %s which is being removed", ctr.ID)
|
|
return errdefs.Conflict(err)
|
|
}
|
|
|
|
err = daemon.containerExport(ctx, ctr, out)
|
|
if err != nil {
|
|
return fmt.Errorf("Error exporting container %s: %v", name, err)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (daemon *Daemon) containerExport(ctx context.Context, container *container.Container, out io.Writer) error {
|
|
err := daemon.imageService.PerformWithBaseFS(ctx, container, func(basefs string) error {
|
|
archv, err := chrootarchive.Tar(basefs, &archive.TarOptions{
|
|
Compression: archive.Uncompressed,
|
|
IDMap: daemon.idMapping,
|
|
}, basefs)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// Stream the entire contents of the container (basically a volatile snapshot)
|
|
_, err = io.Copy(out, archv)
|
|
return err
|
|
})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
daemon.LogContainerEvent(container, events.ActionExport)
|
|
return nil
|
|
}
|