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moby--moby/daemon/commit.go

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package daemon
import (
"github.com/docker/docker/image"
"github.com/docker/docker/runconfig"
)
type ContainerCommitConfig struct {
Pause bool
Repo string
Tag string
Author string
Comment string
Changes []string
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(container *Container, repository, tag, comment, author string, pause bool, config *runconfig.Config) (*image.Image, error) {
if pause && !container.IsPaused() {
container.Pause()
defer container.Unpause()
}
if err := container.Mount(); err != nil {
return nil, err
}
defer container.Unmount()
rwTar, err := container.ExportRw()
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
var (
containerID, parentImageID string
containerConfig *runconfig.Config
)
if container != nil {
containerID = container.ID
parentImageID = container.ImageID
containerConfig = container.Config
}
img, err := daemon.graph.Create(rwTar, containerID, parentImageID, comment, author, containerConfig, config)
if err != nil {
return nil, err
}
// Register the image if needed
if repository != "" {
if err := daemon.repositories.Tag(repository, tag, img.ID, true); err != nil {
return img, err
}
}
return img, nil
}