package daemon import ( "fmt" "strings" "syscall" "github.com/docker/docker/container" "github.com/docker/docker/layer" "github.com/docker/docker/libcontainerd" "github.com/docker/docker/libcontainerd/windowsoci" "github.com/docker/docker/oci" ) func (daemon *Daemon) createSpec(c *container.Container) (*libcontainerd.Spec, error) { s := oci.DefaultSpec() linkedEnv, err := daemon.setupLinkedContainers(c) if err != nil { return nil, err } // TODO Windows - this can be removed. Not used (UID/GID) rootUID, rootGID := daemon.GetRemappedUIDGID() if err := c.SetupWorkingDirectory(rootUID, rootGID); err != nil { return nil, err } img, err := daemon.imageStore.Get(c.ImageID) if err != nil { return nil, fmt.Errorf("Failed to graph.Get on ImageID %s - %s", c.ImageID, err) } // In base spec s.Hostname = c.FullHostname() // In s.Mounts mounts, err := daemon.setupMounts(c) if err != nil { return nil, err } for _, mount := range mounts { s.Mounts = append(s.Mounts, windowsoci.Mount{ Source: mount.Source, Destination: mount.Destination, Readonly: !mount.Writable, }) } // Are we going to run as a Hyper-V container? hv := false if c.HostConfig.Isolation.IsDefault() { // Container is set to use the default, so take the default from the daemon configuration hv = daemon.defaultIsolation.IsHyperV() } else { // Container is requesting an isolation mode. Honour it. hv = c.HostConfig.Isolation.IsHyperV() } if hv { // TODO We don't yet have the ImagePath hooked up. But set to // something non-nil to pickup in libcontainerd. s.Windows.HvRuntime = &windowsoci.HvRuntime{} } // In s.Process s.Process.Args = append([]string{c.Path}, c.Args...) if !c.Config.ArgsEscaped { s.Process.Args = escapeArgs(s.Process.Args) } s.Process.Cwd = c.Config.WorkingDir s.Process.Env = c.CreateDaemonEnvironment(linkedEnv) s.Process.InitialConsoleSize = c.HostConfig.ConsoleSize s.Process.Terminal = c.Config.Tty s.Process.User.User = c.Config.User // In spec.Root s.Root.Path = c.BaseFS s.Root.Readonly = c.HostConfig.ReadonlyRootfs // In s.Windows s.Windows.FirstStart = !c.HasBeenStartedBefore // s.Windows.LayerFolder. m, err := c.RWLayer.Metadata() if err != nil { return nil, fmt.Errorf("Failed to get layer metadata - %s", err) } s.Windows.LayerFolder = m["dir"] // s.Windows.LayerPaths var layerPaths []string if img.RootFS != nil && img.RootFS.Type == "layers+base" { max := len(img.RootFS.DiffIDs) for i := 0; i <= max; i++ { img.RootFS.DiffIDs = img.RootFS.DiffIDs[:i] path, err := layer.GetLayerPath(daemon.layerStore, img.RootFS.ChainID()) if err != nil { return nil, fmt.Errorf("Failed to get layer path from graphdriver %s for ImageID %s - %s", daemon.layerStore, img.RootFS.ChainID(), err) } // Reverse order, expecting parent most first layerPaths = append([]string{path}, layerPaths...) } } s.Windows.LayerPaths = layerPaths // In s.Windows.Networking (TP5+ libnetwork way of doing things) // Connect all the libnetwork allocated networks to the container var epList []string if c.NetworkSettings != nil { for n := range c.NetworkSettings.Networks { sn, err := daemon.FindNetwork(n) if err != nil { continue } ep, err := c.GetEndpointInNetwork(sn) if err != nil { continue } data, err := ep.DriverInfo() if err != nil { continue } if data["hnsid"] != nil { epList = append(epList, data["hnsid"].(string)) } } } s.Windows.Networking = &windowsoci.Networking{ EndpointList: epList, } // In s.Windows.Networking (TP4 back compat) // TODO Windows: Post TP4 - Remove this along with definitions from spec // and changes to libcontainerd to not read these fields. if daemon.netController == nil { parts := strings.SplitN(string(c.HostConfig.NetworkMode), ":", 2) switch parts[0] { case "none": case "default", "": // empty string to support existing containers if !c.Config.NetworkDisabled { s.Windows.Networking = &windowsoci.Networking{ MacAddress: c.Config.MacAddress, Bridge: daemon.configStore.bridgeConfig.Iface, PortBindings: c.HostConfig.PortBindings, } } default: return nil, fmt.Errorf("invalid network mode: %s", c.HostConfig.NetworkMode) } } // In s.Windows.Resources // @darrenstahlmsft implement these resources cpuShares := uint64(c.HostConfig.CPUShares) s.Windows.Resources = &windowsoci.Resources{ CPU: &windowsoci.CPU{ //TODO Count: ..., //TODO Percent: ..., Shares: &cpuShares, }, Memory: &windowsoci.Memory{ //TODO Limit: ..., //TODO Reservation: ..., }, Network: &windowsoci.Network{ //TODO Bandwidth: ..., }, Storage: &windowsoci.Storage{ //TODO Bps: ..., //TODO Iops: ..., //TODO SandboxSize: ..., }, } return (*libcontainerd.Spec)(&s), nil } func escapeArgs(args []string) []string { escapedArgs := make([]string, len(args)) for i, a := range args { escapedArgs[i] = syscall.EscapeArg(a) } return escapedArgs }