package daemon import ( "fmt" "net" "strings" "github.com/Sirupsen/logrus" "github.com/docker/docker/api/types" containertypes "github.com/docker/docker/api/types/container" networktypes "github.com/docker/docker/api/types/network" "github.com/docker/docker/container" "github.com/docker/docker/errors" "github.com/docker/docker/image" "github.com/docker/docker/layer" "github.com/docker/docker/pkg/idtools" "github.com/docker/docker/pkg/stringid" "github.com/docker/docker/runconfig" volumestore "github.com/docker/docker/volume/store" "github.com/opencontainers/runc/libcontainer/label" ) // CreateManagedContainer creates a container that is managed by a Service func (daemon *Daemon) CreateManagedContainer(params types.ContainerCreateConfig, validateHostname bool) (types.ContainerCreateResponse, error) { return daemon.containerCreate(params, true, validateHostname) } // ContainerCreate creates a regular container func (daemon *Daemon) ContainerCreate(params types.ContainerCreateConfig, validateHostname bool) (types.ContainerCreateResponse, error) { return daemon.containerCreate(params, false, validateHostname) } func (daemon *Daemon) containerCreate(params types.ContainerCreateConfig, managed bool, validateHostname bool) (types.ContainerCreateResponse, error) { if params.Config == nil { return types.ContainerCreateResponse{}, fmt.Errorf("Config cannot be empty in order to create a container") } warnings, err := daemon.verifyContainerSettings(params.HostConfig, params.Config, false, validateHostname) if err != nil { return types.ContainerCreateResponse{Warnings: warnings}, err } err = daemon.verifyNetworkingConfig(params.NetworkingConfig) if err != nil { return types.ContainerCreateResponse{Warnings: warnings}, err } if params.HostConfig == nil { params.HostConfig = &containertypes.HostConfig{} } err = daemon.adaptContainerSettings(params.HostConfig, params.AdjustCPUShares) if err != nil { return types.ContainerCreateResponse{Warnings: warnings}, err } container, err := daemon.create(params, managed) if err != nil { return types.ContainerCreateResponse{Warnings: warnings}, daemon.imageNotExistToErrcode(err) } return types.ContainerCreateResponse{ID: container.ID, Warnings: warnings}, nil } // Create creates a new container from the given configuration with a given name. func (daemon *Daemon) create(params types.ContainerCreateConfig, managed bool) (retC *container.Container, retErr error) { var ( container *container.Container img *image.Image imgID image.ID err error ) if params.Config.Image != "" { img, err = daemon.GetImage(params.Config.Image) if err != nil { return nil, err } imgID = img.ID() } if err := daemon.mergeAndVerifyConfig(params.Config, img); err != nil { return nil, err } if err := daemon.mergeAndVerifyLogConfig(¶ms.HostConfig.LogConfig); err != nil { return nil, err } if container, err = daemon.newContainer(params.Name, params.Config, imgID, managed); err != nil { return nil, err } defer func() { if retErr != nil { if err := daemon.cleanupContainer(container, true, true); err != nil { logrus.Errorf("failed to cleanup container on create error: %v", err) } } }() if err := daemon.setSecurityOptions(container, params.HostConfig); err != nil { return nil, err } container.HostConfig.StorageOpt = params.HostConfig.StorageOpt // Set RWLayer for container after mount labels have been set if err := daemon.setRWLayer(container); err != nil { return nil, err } rootUID, rootGID, err := idtools.GetRootUIDGID(daemon.uidMaps, daemon.gidMaps) if err != nil { return nil, err } if err := idtools.MkdirAs(container.Root, 0700, rootUID, rootGID); err != nil { return nil, err } if err := daemon.setHostConfig(container, params.HostConfig); err != nil { return nil, err } if err := daemon.createContainerPlatformSpecificSettings(container, params.Config, params.HostConfig); err != nil { return nil, err } var endpointsConfigs map[string]*networktypes.EndpointSettings if params.NetworkingConfig != nil { endpointsConfigs = params.NetworkingConfig.EndpointsConfig } // Make sure NetworkMode has an acceptable value. We do this to ensure // backwards API compatibility. container.HostConfig = runconfig.SetDefaultNetModeIfBlank(container.HostConfig) if err := daemon.updateContainerNetworkSettings(container, endpointsConfigs); err != nil { return nil, err } if err := container.ToDisk(); err != nil { logrus.Errorf("Error saving new container to disk: %v", err) return nil, err } if err := daemon.Register(container); err != nil { return nil, err } daemon.LogContainerEvent(container, "create") return container, nil } func (daemon *Daemon) generateSecurityOpt(ipcMode containertypes.IpcMode, pidMode containertypes.PidMode, privileged bool) ([]string, error) { if ipcMode.IsHost() || pidMode.IsHost() || privileged { return label.DisableSecOpt(), nil } var ipcLabel []string var pidLabel []string ipcContainer := ipcMode.Container() pidContainer := pidMode.Container() if ipcContainer != "" { c, err := daemon.GetContainer(ipcContainer) if err != nil { return nil, err } ipcLabel = label.DupSecOpt(c.ProcessLabel) if pidContainer == "" { return ipcLabel, err } } if pidContainer != "" { c, err := daemon.GetContainer(pidContainer) if err != nil { return nil, err } pidLabel = label.DupSecOpt(c.ProcessLabel) if ipcContainer == "" { return pidLabel, err } } if pidLabel != nil && ipcLabel != nil { for i := 0; i < len(pidLabel); i++ { if pidLabel[i] != ipcLabel[i] { return nil, fmt.Errorf("--ipc and --pid containers SELinux labels aren't the same") } } return pidLabel, nil } return nil, nil } func (daemon *Daemon) setRWLayer(container *container.Container) error { var layerID layer.ChainID if container.ImageID != "" { img, err := daemon.imageStore.Get(container.ImageID) if err != nil { return err } layerID = img.RootFS.ChainID() } rwLayer, err := daemon.layerStore.CreateRWLayer(container.ID, layerID, container.MountLabel, daemon.setupInitLayer, container.HostConfig.StorageOpt) if err != nil { return err } container.RWLayer = rwLayer return nil } // VolumeCreate creates a volume with the specified name, driver, and opts // This is called directly from the remote API func (daemon *Daemon) VolumeCreate(name, driverName string, opts, labels map[string]string) (*types.Volume, error) { if name == "" { name = stringid.GenerateNonCryptoID() } v, err := daemon.volumes.Create(name, driverName, opts, labels) if err != nil { if volumestore.IsNameConflict(err) { return nil, fmt.Errorf("A volume named %s already exists. Choose a different volume name.", name) } return nil, err } daemon.LogVolumeEvent(v.Name(), "create", map[string]string{"driver": v.DriverName()}) apiV := volumeToAPIType(v) apiV.Mountpoint = v.Path() return apiV, nil } func (daemon *Daemon) mergeAndVerifyConfig(config *containertypes.Config, img *image.Image) error { if img != nil && img.Config != nil { if err := merge(config, img.Config); err != nil { return err } } // Reset the Entrypoint if it is [""] if len(config.Entrypoint) == 1 && config.Entrypoint[0] == "" { config.Entrypoint = nil } if len(config.Entrypoint) == 0 && len(config.Cmd) == 0 { return fmt.Errorf("No command specified") } return nil } // Checks if the client set configurations for more than one network while creating a container // Also checks if the IPAMConfig is valid func (daemon *Daemon) verifyNetworkingConfig(nwConfig *networktypes.NetworkingConfig) error { if nwConfig == nil || len(nwConfig.EndpointsConfig) == 0 { return nil } if len(nwConfig.EndpointsConfig) == 1 { for _, v := range nwConfig.EndpointsConfig { if v != nil && v.IPAMConfig != nil { if v.IPAMConfig.IPv4Address != "" && net.ParseIP(v.IPAMConfig.IPv4Address).To4() == nil { return errors.NewBadRequestError(fmt.Errorf("invalid IPv4 address: %s", v.IPAMConfig.IPv4Address)) } if v.IPAMConfig.IPv6Address != "" { n := net.ParseIP(v.IPAMConfig.IPv6Address) // if the address is an invalid network address (ParseIP == nil) or if it is // an IPv4 address (To4() != nil), then it is an invalid IPv6 address if n == nil || n.To4() != nil { return errors.NewBadRequestError(fmt.Errorf("invalid IPv6 address: %s", v.IPAMConfig.IPv6Address)) } } } } return nil } l := make([]string, 0, len(nwConfig.EndpointsConfig)) for k := range nwConfig.EndpointsConfig { l = append(l, k) } err := fmt.Errorf("Container cannot be connected to network endpoints: %s", strings.Join(l, ", ")) return errors.NewBadRequestError(err) }