| package daemon |
| |
| import ( |
| "encoding/json" |
| "fmt" |
| "io" |
| "runtime" |
| "strings" |
| "time" |
| |
| "github.com/docker/docker/api/types/backend" |
| containertypes "github.com/docker/docker/api/types/container" |
| "github.com/docker/docker/builder/dockerfile" |
| "github.com/docker/docker/container" |
| "github.com/docker/docker/dockerversion" |
| "github.com/docker/docker/image" |
| "github.com/docker/docker/layer" |
| "github.com/docker/docker/pkg/ioutils" |
| "github.com/docker/docker/reference" |
| ) |
| |
| // merge merges two Config, the image container configuration (defaults values), |
| // and the user container configuration, either passed by the API or generated |
| // by the cli. |
| // It will mutate the specified user configuration (userConf) with the image |
| // configuration where the user configuration is incomplete. |
| func merge(userConf, imageConf *containertypes.Config) error { |
| if userConf.User == "" { |
| userConf.User = imageConf.User |
| } |
| if len(userConf.ExposedPorts) == 0 { |
| userConf.ExposedPorts = imageConf.ExposedPorts |
| } else if imageConf.ExposedPorts != nil { |
| for port := range imageConf.ExposedPorts { |
| if _, exists := userConf.ExposedPorts[port]; !exists { |
| userConf.ExposedPorts[port] = struct{}{} |
| } |
| } |
| } |
| |
| if len(userConf.Env) == 0 { |
| userConf.Env = imageConf.Env |
| } else { |
| for _, imageEnv := range imageConf.Env { |
| found := false |
| imageEnvKey := strings.Split(imageEnv, "=")[0] |
| for _, userEnv := range userConf.Env { |
| userEnvKey := strings.Split(userEnv, "=")[0] |
| if runtime.GOOS == "windows" { |
| // Case insensitive environment variables on Windows |
| imageEnvKey = strings.ToUpper(imageEnvKey) |
| userEnvKey = strings.ToUpper(userEnvKey) |
| } |
| if imageEnvKey == userEnvKey { |
| found = true |
| break |
| } |
| } |
| if !found { |
| userConf.Env = append(userConf.Env, imageEnv) |
| } |
| } |
| } |
| |
| if userConf.Labels == nil { |
| userConf.Labels = map[string]string{} |
| } |
| for l, v := range imageConf.Labels { |
| if _, ok := userConf.Labels[l]; !ok { |
| userConf.Labels[l] = v |
| } |
| } |
| |
| if len(userConf.Entrypoint) == 0 { |
| if len(userConf.Cmd) == 0 { |
| userConf.Cmd = imageConf.Cmd |
| userConf.ArgsEscaped = imageConf.ArgsEscaped |
| } |
| |
| if userConf.Entrypoint == nil { |
| userConf.Entrypoint = imageConf.Entrypoint |
| } |
| } |
| if imageConf.Healthcheck != nil { |
| if userConf.Healthcheck == nil { |
| userConf.Healthcheck = imageConf.Healthcheck |
| } else { |
| if len(userConf.Healthcheck.Test) == 0 { |
| userConf.Healthcheck.Test = imageConf.Healthcheck.Test |
| } |
| if userConf.Healthcheck.Interval == 0 { |
| userConf.Healthcheck.Interval = imageConf.Healthcheck.Interval |
| } |
| if userConf.Healthcheck.Timeout == 0 { |
| userConf.Healthcheck.Timeout = imageConf.Healthcheck.Timeout |
| } |
| if userConf.Healthcheck.Retries == 0 { |
| userConf.Healthcheck.Retries = imageConf.Healthcheck.Retries |
| } |
| } |
| } |
| |
| if userConf.WorkingDir == "" { |
| userConf.WorkingDir = imageConf.WorkingDir |
| } |
| if len(userConf.Volumes) == 0 { |
| userConf.Volumes = imageConf.Volumes |
| } else { |
| for k, v := range imageConf.Volumes { |
| userConf.Volumes[k] = v |
| } |
| } |
| |
| if userConf.StopSignal == "" { |
| userConf.StopSignal = imageConf.StopSignal |
| } |
| return nil |
| } |
| |
| // 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 *backend.ContainerCommitConfig) (string, error) { |
| start := time.Now() |
| container, err := daemon.GetContainer(name) |
| if err != nil { |
| return "", err |
| } |
| |
| // It is not possible to commit a running container on Windows and on Solaris. |
| if (runtime.GOOS == "windows" || runtime.GOOS == "solaris") && container.IsRunning() { |
| return "", fmt.Errorf("%+v does not support commit of a running container", runtime.GOOS) |
| } |
| |
| if c.Pause && !container.IsPaused() { |
| daemon.containerPause(container) |
| defer daemon.containerUnpause(container) |
| } |
| |
| newConfig, err := dockerfile.BuildFromConfig(c.Config, c.Changes) |
| if err != nil { |
| return "", err |
| } |
| |
| if c.MergeConfigs { |
| if err := merge(newConfig, container.Config); err != nil { |
| return "", err |
| } |
| } |
| |
| rwTar, err := daemon.exportContainerRw(container) |
| if err != nil { |
| return "", err |
| } |
| defer func() { |
| if rwTar != nil { |
| rwTar.Close() |
| } |
| }() |
| |
| var history []image.History |
| rootFS := image.NewRootFS() |
| osVersion := "" |
| var osFeatures []string |
| |
| if container.ImageID != "" { |
| img, err := daemon.imageStore.Get(container.ImageID) |
| if err != nil { |
| return "", err |
| } |
| history = img.History |
| rootFS = img.RootFS |
| osVersion = img.OSVersion |
| osFeatures = img.OSFeatures |
| } |
| |
| l, err := daemon.layerStore.Register(rwTar, rootFS.ChainID()) |
| if err != nil { |
| return "", err |
| } |
| defer layer.ReleaseAndLog(daemon.layerStore, l) |
| |
| h := image.History{ |
| Author: c.Author, |
| Created: time.Now().UTC(), |
| CreatedBy: strings.Join(container.Config.Cmd, " "), |
| Comment: c.Comment, |
| EmptyLayer: true, |
| } |
| |
| if diffID := l.DiffID(); layer.DigestSHA256EmptyTar != diffID { |
| h.EmptyLayer = false |
| rootFS.Append(diffID) |
| } |
| |
| history = append(history, h) |
| |
| config, err := json.Marshal(&image.Image{ |
| V1Image: image.V1Image{ |
| DockerVersion: dockerversion.Version, |
| Config: newConfig, |
| Architecture: runtime.GOARCH, |
| OS: runtime.GOOS, |
| Container: container.ID, |
| ContainerConfig: *container.Config, |
| Author: c.Author, |
| Created: h.Created, |
| }, |
| RootFS: rootFS, |
| History: history, |
| OSFeatures: osFeatures, |
| OSVersion: osVersion, |
| }) |
| |
| if err != nil { |
| return "", err |
| } |
| |
| id, err := daemon.imageStore.Create(config) |
| if err != nil { |
| return "", err |
| } |
| |
| if container.ImageID != "" { |
| if err := daemon.imageStore.SetParent(id, container.ImageID); err != nil { |
| return "", err |
| } |
| } |
| |
| imageRef := "" |
| if c.Repo != "" { |
| newTag, err := reference.WithName(c.Repo) // todo: should move this to API layer |
| if err != nil { |
| return "", err |
| } |
| if c.Tag != "" { |
| if newTag, err = reference.WithTag(newTag, c.Tag); err != nil { |
| return "", err |
| } |
| } |
| if err := daemon.TagImageWithReference(id, newTag); err != nil { |
| return "", err |
| } |
| imageRef = newTag.String() |
| } |
| |
| attributes := map[string]string{ |
| "comment": c.Comment, |
| "imageID": id.String(), |
| "imageRef": imageRef, |
| } |
| daemon.LogContainerEventWithAttributes(container, "commit", attributes) |
| containerActions.WithValues("commit").UpdateSince(start) |
| return id.String(), nil |
| } |
| |
| func (daemon *Daemon) exportContainerRw(container *container.Container) (io.ReadCloser, error) { |
| if err := daemon.Mount(container); err != nil { |
| return nil, err |
| } |
| |
| archive, err := container.RWLayer.TarStream() |
| if err != nil { |
| daemon.Unmount(container) // logging is already handled in the `Unmount` function |
| return nil, err |
| } |
| return ioutils.NewReadCloserWrapper(archive, func() error { |
| archive.Close() |
| return container.RWLayer.Unmount() |
| }), |
| nil |
| } |