package daemon // import "github.com/docker/docker/daemon" import ( "fmt" "net" "runtime" "strings" "time" "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/errdefs" "github.com/docker/docker/image" "github.com/docker/docker/pkg/idtools" "github.com/docker/docker/pkg/system" "github.com/docker/docker/runconfig" "github.com/opencontainers/selinux/go-selinux/label" "github.com/pkg/errors" "github.com/sirupsen/logrus" ) // CreateManagedContainer creates a container that is managed by a Service func (daemon *Daemon) CreateManagedContainer(params types.ContainerCreateConfig) (containertypes.ContainerCreateCreatedBody, error) { return daemon.containerCreate(params, true) } // ContainerCreate creates a regular container func (daemon *Daemon) ContainerCreate(params types.ContainerCreateConfig) (containertypes.ContainerCreateCreatedBody, error) { return daemon.containerCreate(params, false) } func (daemon *Daemon) containerCreate(params types.ContainerCreateConfig, managed bool) (containertypes.ContainerCreateCreatedBody, error) { start := time.Now() if params.Config == nil { return containertypes.ContainerCreateCreatedBody{}, errdefs.InvalidParameter(errors.New("Config cannot be empty in order to create a container")) } os := runtime.GOOS if params.Config.Image != "" { img, err := daemon.imageService.GetImage(params.Config.Image) if err == nil { os = img.OS } } else { // This mean scratch. On Windows, we can safely assume that this is a linux // container. On other platforms, it's the host OS (which it already is) if runtime.GOOS == "windows" && system.LCOWSupported() { os = "linux" } } warnings, err := daemon.verifyContainerSettings(os, params.HostConfig, params.Config, false) if err != nil { return containertypes.ContainerCreateCreatedBody{Warnings: warnings}, errdefs.InvalidParameter(err) } err = verifyNetworkingConfig(params.NetworkingConfig) if err != nil { return containertypes.ContainerCreateCreatedBody{Warnings: warnings}, errdefs.InvalidParameter(err) } if params.HostConfig == nil { params.HostConfig = &containertypes.HostConfig{} } err = daemon.adaptContainerSettings(params.HostConfig, params.AdjustCPUShares) if err != nil { return containertypes.ContainerCreateCreatedBody{Warnings: warnings}, errdefs.InvalidParameter(err) } container, err := daemon.create(params, managed) if err != nil { return containertypes.ContainerCreateCreatedBody{Warnings: warnings}, err } containerActions.WithValues("create").UpdateSince(start) return containertypes.ContainerCreateCreatedBody{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 ) os := runtime.GOOS if params.Config.Image != "" { img, err = daemon.imageService.GetImage(params.Config.Image) if err != nil { return nil, err } if img.OS != "" { os = img.OS } else { // default to the host OS except on Windows with LCOW if runtime.GOOS == "windows" && system.LCOWSupported() { os = "linux" } } imgID = img.ID() if runtime.GOOS == "windows" && img.OS == "linux" && !system.LCOWSupported() { return nil, errors.New("operating system on which parent image was created is not Windows") } } else { if runtime.GOOS == "windows" { os = "linux" // 'scratch' case. } } if err := daemon.mergeAndVerifyConfig(params.Config, img); err != nil { return nil, errdefs.InvalidParameter(err) } if err := daemon.mergeAndVerifyLogConfig(¶ms.HostConfig.LogConfig); err != nil { return nil, errdefs.InvalidParameter(err) } if container, err = daemon.newContainer(params.Name, os, params.Config, params.HostConfig, 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 // Fixes: https://github.com/moby/moby/issues/34074 and // https://github.com/docker/for-win/issues/999. // Merge the daemon's storage options if they aren't already present. We only // do this on Windows as there's no effective sandbox size limit other than // physical on Linux. if runtime.GOOS == "windows" { if container.HostConfig.StorageOpt == nil { container.HostConfig.StorageOpt = make(map[string]string) } for _, v := range daemon.configStore.GraphOptions { opt := strings.SplitN(v, "=", 2) if _, ok := container.HostConfig.StorageOpt[opt[0]]; !ok { container.HostConfig.StorageOpt[opt[0]] = opt[1] } } } // Set RWLayer for container after mount labels have been set rwLayer, err := daemon.imageService.CreateLayer(container, setupInitLayer(daemon.idMapping)) if err != nil { return nil, errdefs.System(err) } container.RWLayer = rwLayer rootIDs := daemon.idMapping.RootPair() if err := idtools.MkdirAndChown(container.Root, 0700, rootIDs); err != nil { return nil, err } if err := idtools.MkdirAndChown(container.CheckpointDir(), 0700, rootIDs); err != nil { return nil, err } if err := daemon.setHostConfig(container, params.HostConfig); err != nil { return nil, err } if err := daemon.createContainerOSSpecificSettings(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. runconfig.SetDefaultNetModeIfBlank(container.HostConfig) daemon.updateContainerNetworkSettings(container, endpointsConfigs) if err := daemon.Register(container); err != nil { return nil, err } stateCtr.set(container.ID, "stopped") daemon.LogContainerEvent(container, "create") return container, nil } func toHostConfigSelinuxLabels(labels []string) []string { for i, l := range labels { labels[i] = "label=" + l } return labels } func (daemon *Daemon) generateSecurityOpt(hostConfig *containertypes.HostConfig) ([]string, error) { for _, opt := range hostConfig.SecurityOpt { con := strings.Split(opt, "=") if con[0] == "label" { // Caller overrode SecurityOpts return nil, nil } } ipcMode := hostConfig.IpcMode pidMode := hostConfig.PidMode privileged := hostConfig.Privileged if ipcMode.IsHost() || pidMode.IsHost() || privileged { return toHostConfigSelinuxLabels(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 toHostConfigSelinuxLabels(ipcLabel), err } } if pidContainer != "" { c, err := daemon.GetContainer(pidContainer) if err != nil { return nil, err } pidLabel = label.DupSecOpt(c.ProcessLabel) if ipcContainer == "" { return toHostConfigSelinuxLabels(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 toHostConfigSelinuxLabels(pidLabel), nil } return nil, 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 verifyNetworkingConfig(nwConfig *networktypes.NetworkingConfig) error { if nwConfig == nil || len(nwConfig.EndpointsConfig) == 0 { return nil } if len(nwConfig.EndpointsConfig) == 1 { for k, v := range nwConfig.EndpointsConfig { if v == nil { return errdefs.InvalidParameter(errors.Errorf("no EndpointSettings for %s", k)) } if v.IPAMConfig != nil { if v.IPAMConfig.IPv4Address != "" && net.ParseIP(v.IPAMConfig.IPv4Address).To4() == nil { return errors.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.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) } return errors.Errorf("Container cannot be connected to network endpoints: %s", strings.Join(l, ", ")) }