| package daemon |
| |
| import ( |
| "encoding/json" |
| "fmt" |
| "io" |
| "runtime" |
| "strings" |
| "time" |
| |
| "github.com/docker/distribution/reference" |
| "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/image" |
| "github.com/docker/docker/layer" |
| "github.com/docker/docker/pkg/ioutils" |
| "github.com/pkg/errors" |
| ) |
| |
| // 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.StartPeriod == 0 { |
| userConf.Healthcheck.StartPeriod = imageConf.Healthcheck.StartPeriod |
| } |
| 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 |
| if (runtime.GOOS == "windows") && container.IsRunning() { |
| return "", errors.Errorf("%+v does not support commit of a running container", runtime.GOOS) |
| } |
| |
| if container.IsDead() { |
| err := fmt.Errorf("You cannot commit container %s which is Dead", container.ID) |
| return "", stateConflictError{err} |
| } |
| |
| if container.IsRemovalInProgress() { |
| err := fmt.Errorf("You cannot commit container %s which is being removed", container.ID) |
| return "", stateConflictError{err} |
| } |
| |
| 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 parent *image.Image |
| if container.ImageID == "" { |
| parent = new(image.Image) |
| parent.RootFS = image.NewRootFS() |
| } else { |
| parent, err = daemon.stores[container.OS].imageStore.Get(container.ImageID) |
| if err != nil { |
| return "", err |
| } |
| } |
| |
| l, err := daemon.stores[container.OS].layerStore.Register(rwTar, parent.RootFS.ChainID(), layer.OS(container.OS)) |
| if err != nil { |
| return "", err |
| } |
| defer layer.ReleaseAndLog(daemon.stores[container.OS].layerStore, l) |
| |
| containerConfig := c.ContainerConfig |
| if containerConfig == nil { |
| containerConfig = container.Config |
| } |
| cc := image.ChildConfig{ |
| ContainerID: container.ID, |
| Author: c.Author, |
| Comment: c.Comment, |
| ContainerConfig: containerConfig, |
| Config: newConfig, |
| DiffID: l.DiffID(), |
| } |
| config, err := json.Marshal(image.NewChildImage(parent, cc, container.OS)) |
| if err != nil { |
| return "", err |
| } |
| |
| id, err := daemon.stores[container.OS].imageStore.Create(config) |
| if err != nil { |
| return "", err |
| } |
| |
| if container.ImageID != "" { |
| if err := daemon.stores[container.OS].imageStore.SetParent(id, container.ImageID); err != nil { |
| return "", err |
| } |
| } |
| |
| imageRef := "" |
| if c.Repo != "" { |
| newTag, err := reference.ParseNormalizedNamed(c.Repo) // todo: should move this to API layer |
| if err != nil { |
| return "", err |
| } |
| if !reference.IsNameOnly(newTag) { |
| return "", errors.Errorf("unexpected repository name: %s", c.Repo) |
| } |
| if c.Tag != "" { |
| if newTag, err = reference.WithTag(newTag, c.Tag); err != nil { |
| return "", err |
| } |
| } |
| if err := daemon.TagImageWithReference(id, container.OS, newTag); err != nil { |
| return "", err |
| } |
| imageRef = reference.FamiliarString(newTag) |
| } |
| |
| 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) (arch io.ReadCloser, err error) { |
| rwlayer, err := daemon.stores[container.OS].layerStore.GetRWLayer(container.ID) |
| if err != nil { |
| return nil, err |
| } |
| defer func() { |
| if err != nil { |
| daemon.stores[container.OS].layerStore.ReleaseRWLayer(rwlayer) |
| } |
| }() |
| |
| // TODO: this mount call is not necessary as we assume that TarStream() should |
| // mount the layer if needed. But the Diff() function for windows requests that |
| // the layer should be mounted when calling it. So we reserve this mount call |
| // until windows driver can implement Diff() interface correctly. |
| _, err = rwlayer.Mount(container.GetMountLabel()) |
| if err != nil { |
| return nil, err |
| } |
| |
| archive, err := rwlayer.TarStream() |
| if err != nil { |
| rwlayer.Unmount() |
| return nil, err |
| } |
| return ioutils.NewReadCloserWrapper(archive, func() error { |
| archive.Close() |
| err = rwlayer.Unmount() |
| daemon.stores[container.OS].layerStore.ReleaseRWLayer(rwlayer) |
| return err |
| }), |
| nil |
| } |