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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"
)
// 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
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, c *ContainerCommitConfig) (*image.Image, error) {
if c.Pause && !container.isPaused() {
container.pause()
defer container.unpause()
}
rwTar, err := container.exportContainerRw()
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
}
}
container.logEvent("commit")
return img, nil
}