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moby--moby/daemon/commit.go
Alexander Morozov 38e34cf6da Use name instead of container in Commit
It will make daemon interface separation easier later.

Signed-off-by: Alexander Morozov <lk4d4@docker.com>
2015-11-06 10:22:00 -08:00

87 lines
2.2 KiB
Go

package daemon
import (
"fmt"
"runtime"
"github.com/docker/docker/image"
"github.com/docker/docker/pkg/archive"
"github.com/docker/docker/pkg/ioutils"
"github.com/docker/docker/runconfig"
)
// ContainerCommitConfig contains build configs for commit operation,
// and is used when making a commit with the current state of the container.
type ContainerCommitConfig struct {
Pause bool
Repo string
Tag string
Author string
Comment string
// merge container config into commit config before commit
MergeConfigs bool
Config *runconfig.Config
}
// Commit creates a new filesystem image from the current state of a container.
// The image can optionally be tagged into a repository.
func (daemon *Daemon) Commit(name string, c *ContainerCommitConfig) (*image.Image, error) {
container, err := daemon.Get(name)
if err != nil {
return nil, err
}
// It is not possible to commit a running container on Windows
if runtime.GOOS == "windows" && container.IsRunning() {
return nil, fmt.Errorf("Windows does not support commit of a running container")
}
if c.Pause && !container.isPaused() {
daemon.containerPause(container)
defer daemon.containerUnpause(container)
}
if c.MergeConfigs {
if err := runconfig.Merge(c.Config, container.Config); err != nil {
return nil, err
}
}
rwTar, err := daemon.exportContainerRw(container)
if err != nil {
return nil, err
}
defer func() {
if rwTar != nil {
rwTar.Close()
}
}()
// Create a new image from the container's base layers + a new layer from container changes
img, err := daemon.graph.Create(rwTar, container.ID, container.ImageID, c.Comment, c.Author, container.Config, c.Config)
if err != nil {
return nil, err
}
// Register the image if needed
if c.Repo != "" {
if err := daemon.repositories.Tag(c.Repo, c.Tag, img.ID, true); err != nil {
return img, err
}
}
daemon.LogContainerEvent(container, "commit")
return img, nil
}
func (daemon *Daemon) exportContainerRw(container *Container) (archive.Archive, error) {
archive, err := daemon.diff(container)
if err != nil {
return nil, err
}
return ioutils.NewReadCloserWrapper(archive, func() error {
err := archive.Close()
return err
}),
nil
}