package main import ( "context" "encoding/json" "fmt" "os" "strconv" "strings" "syscall" "github.com/containers/storage" "github.com/docker/docker/api/types/container" "github.com/docker/docker/pkg/signal" "github.com/docker/go-connections/nat" "github.com/docker/go-units" "github.com/opencontainers/selinux/go-selinux/label" "github.com/pkg/errors" "github.com/projectatomic/libpod/cmd/podman/libpodruntime" "github.com/projectatomic/libpod/libpod" "github.com/projectatomic/libpod/libpod/image" ann "github.com/projectatomic/libpod/pkg/annotations" "github.com/projectatomic/libpod/pkg/inspect" cc "github.com/projectatomic/libpod/pkg/spec" "github.com/projectatomic/libpod/pkg/util" "github.com/sirupsen/logrus" "github.com/urfave/cli" ) var ( defaultEnvVariables = map[string]string{ "PATH": "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin", "TERM": "xterm", } ) var createDescription = "Creates a new container from the given image or" + " storage and prepares it for running the specified command. The" + " container ID is then printed to stdout. You can then start it at" + " any time with the podman start command. The container" + " will be created with the initial state 'created'." var createCommand = cli.Command{ Name: "create", Usage: "create but do not start a container", Description: createDescription, Flags: createFlags, Action: createCmd, ArgsUsage: "IMAGE [COMMAND [ARG...]]", SkipArgReorder: true, UseShortOptionHandling: true, } func createCmd(c *cli.Context) error { // TODO should allow user to create based off a directory on the host not just image // Need CLI support for this if err := validateFlags(c, createFlags); err != nil { return err } if c.String("cidfile") != "" { if _, err := os.Stat(c.String("cidfile")); err == nil { return errors.Errorf("container id file exists. ensure another container is not using it or delete %s", c.String("cidfile")) } if err := libpod.WriteFile("", c.String("cidfile")); err != nil { return errors.Wrapf(err, "unable to write cidfile %s", c.String("cidfile")) } } if len(c.Args()) < 1 { return errors.Errorf("image name or ID is required") } mappings, err := util.ParseIDMapping(c.StringSlice("uidmap"), c.StringSlice("gidmap"), c.String("subuidmap"), c.String("subgidmap")) if err != nil { return err } storageOpts := storage.DefaultStoreOptions storageOpts.UIDMap = mappings.UIDMap storageOpts.GIDMap = mappings.GIDMap runtime, err := libpodruntime.GetRuntimeWithStorageOpts(c, &storageOpts) if err != nil { return errors.Wrapf(err, "error creating libpod runtime") } defer runtime.Shutdown(false) rtc := runtime.GetConfig() ctx := getContext() newImage, err := runtime.ImageRuntime().New(ctx, c.Args()[0], rtc.SignaturePolicyPath, "", os.Stderr, nil, image.SigningOptions{}, false, false) if err != nil { return err } data, err := newImage.Inspect(ctx) createConfig, err := parseCreateOpts(ctx, c, runtime, newImage.Names()[0], data) if err != nil { return err } useImageVolumes := createConfig.ImageVolumeType == "bind" runtimeSpec, err := cc.CreateConfigToOCISpec(createConfig) if err != nil { return err } options, err := createConfig.GetContainerCreateOptions() if err != nil { return errors.Wrapf(err, "unable to parse new container options") } // Gather up the options for NewContainer which consist of With... funcs options = append(options, libpod.WithRootFSFromImage(createConfig.ImageID, createConfig.Image, useImageVolumes)) options = append(options, libpod.WithSELinuxLabels(createConfig.ProcessLabel, createConfig.MountLabel)) options = append(options, libpod.WithConmonPidFile(createConfig.ConmonPidFile)) options = append(options, libpod.WithLabels(createConfig.Labels)) options = append(options, libpod.WithUser(createConfig.User)) options = append(options, libpod.WithShmDir(createConfig.ShmDir)) options = append(options, libpod.WithShmSize(createConfig.Resources.ShmSize)) options = append(options, libpod.WithGroups(createConfig.GroupAdd)) options = append(options, libpod.WithIDMappings(*createConfig.IDMappings)) ctr, err := runtime.NewContainer(ctx, runtimeSpec, options...) if err != nil { return err } createConfigJSON, err := json.Marshal(createConfig) if err != nil { return err } if err := ctr.AddArtifact("create-config", createConfigJSON); err != nil { return err } logrus.Debug("new container created ", ctr.ID()) if c.String("cidfile") != "" { err := libpod.WriteFile(ctr.ID(), c.String("cidfile")) if err != nil { logrus.Error(err) } } fmt.Printf("%s\n", ctr.ID()) return nil } func parseSecurityOpt(config *cc.CreateConfig, securityOpts []string) error { var ( labelOpts []string err error ) if config.PidMode.IsHost() { labelOpts = append(labelOpts, label.DisableSecOpt()...) } else if config.PidMode.IsContainer() { ctr, err := config.Runtime.LookupContainer(config.PidMode.Container()) if err != nil { return errors.Wrapf(err, "container %q not found", config.PidMode.Container()) } labelOpts = append(labelOpts, label.DupSecOpt(ctr.ProcessLabel())...) } if config.IpcMode.IsHost() { labelOpts = append(labelOpts, label.DisableSecOpt()...) } else if config.IpcMode.IsContainer() { ctr, err := config.Runtime.LookupContainer(config.IpcMode.Container()) if err != nil { return errors.Wrapf(err, "container %q not found", config.IpcMode.Container()) } labelOpts = append(labelOpts, label.DupSecOpt(ctr.ProcessLabel())...) } for _, opt := range securityOpts { if opt == "no-new-privileges" { config.NoNewPrivs = true } else { con := strings.SplitN(opt, "=", 2) if len(con) != 2 { return fmt.Errorf("Invalid --security-opt 1: %q", opt) } switch con[0] { case "label": labelOpts = append(labelOpts, con[1]) case "apparmor": config.ApparmorProfile = con[1] case "seccomp": config.SeccompProfilePath = con[1] default: return fmt.Errorf("Invalid --security-opt 2: %q", opt) } } } if config.SeccompProfilePath == "" { if _, err := os.Stat(libpod.SeccompOverridePath); err == nil { config.SeccompProfilePath = libpod.SeccompOverridePath } else { if !os.IsNotExist(err) { return errors.Wrapf(err, "can't check if %q exists", libpod.SeccompOverridePath) } if _, err := os.Stat(libpod.SeccompDefaultPath); err != nil { if !os.IsNotExist(err) { return errors.Wrapf(err, "can't check if %q exists", libpod.SeccompDefaultPath) } } else { config.SeccompProfilePath = libpod.SeccompDefaultPath } } } config.ProcessLabel, config.MountLabel, err = label.InitLabels(labelOpts) return err } // isPortInPortBindings determines if an exposed host port is in user // provided ports func isPortInPortBindings(pb map[nat.Port][]nat.PortBinding, port nat.Port) bool { var hostPorts []string for _, i := range pb { hostPorts = append(hostPorts, i[0].HostPort) } return util.StringInSlice(port.Port(), hostPorts) } // isPortInImagePorts determines if an exposed host port was given to us by metadata // in the image itself func isPortInImagePorts(exposedPorts map[string]struct{}, port string) bool { for i := range exposedPorts { fields := strings.Split(i, "/") if port == fields[0] { return true } } return false } // Parses CLI options related to container creation into a config which can be // parsed into an OCI runtime spec func parseCreateOpts(ctx context.Context, c *cli.Context, runtime *libpod.Runtime, imageName string, data *inspect.ImageData) (*cc.CreateConfig, error) { var ( inputCommand, command []string memoryLimit, memoryReservation, memorySwap, memoryKernel int64 blkioWeight uint16 ) idmappings, err := util.ParseIDMapping(c.StringSlice("uidmap"), c.StringSlice("gidmap"), c.String("subuidname"), c.String("subgidname")) if err != nil { return nil, err } imageID := data.ID if len(c.Args()) > 1 { inputCommand = c.Args()[1:] } sysctl, err := validateSysctl(c.StringSlice("sysctl")) if err != nil { return nil, errors.Wrapf(err, "invalid value for sysctl") } if c.String("memory") != "" { memoryLimit, err = units.RAMInBytes(c.String("memory")) if err != nil { return nil, errors.Wrapf(err, "invalid value for memory") } } if c.String("memory-reservation") != "" { memoryReservation, err = units.RAMInBytes(c.String("memory-reservation")) if err != nil { return nil, errors.Wrapf(err, "invalid value for memory-reservation") } } if c.String("memory-swap") != "" { memorySwap, err = units.RAMInBytes(c.String("memory-swap")) if err != nil { return nil, errors.Wrapf(err, "invalid value for memory-swap") } } if c.String("kernel-memory") != "" { memoryKernel, err = units.RAMInBytes(c.String("kernel-memory")) if err != nil { return nil, errors.Wrapf(err, "invalid value for kernel-memory") } } if c.String("blkio-weight") != "" { u, err := strconv.ParseUint(c.String("blkio-weight"), 10, 16) if err != nil { return nil, errors.Wrapf(err, "invalid value for blkio-weight") } blkioWeight = uint16(u) } if err = parseVolumes(c.StringSlice("volume")); err != nil { return nil, err } tty := c.Bool("tty") pidMode := container.PidMode(c.String("pid")) if !pidMode.Valid() { return nil, errors.Errorf("--pid %q is not valid", c.String("pid")) } usernsMode := container.UsernsMode(c.String("userns")) if !usernsMode.Valid() { return nil, errors.Errorf("--userns %q is not valid", c.String("userns")) } if c.Bool("detach") && c.Bool("rm") { return nil, errors.Errorf("--rm and --detach can not be specified together") } if c.Int64("cpu-period") != 0 && c.Float64("cpus") > 0 { return nil, errors.Errorf("--cpu-period and --cpus cannot be set together") } if c.Int64("cpu-quota") != 0 && c.Float64("cpus") > 0 { return nil, errors.Errorf("--cpu-quota and --cpus cannot be set together") } utsMode := container.UTSMode(c.String("uts")) if !utsMode.Valid() { return nil, errors.Errorf("--uts %q is not valid", c.String("uts")) } ipcMode := container.IpcMode(c.String("ipc")) if !ipcMode.Valid() { return nil, errors.Errorf("--ipc %q is not valid", ipcMode) } shmDir := "" if ipcMode.IsHost() { shmDir = "/dev/shm" } else if ipcMode.IsContainer() { ctr, err := runtime.LookupContainer(ipcMode.Container()) if err != nil { return nil, errors.Wrapf(err, "container %q not found", ipcMode.Container()) } shmDir = ctr.ShmDir() } // USER user := c.String("user") if user == "" { user = data.ContainerConfig.User } // STOP SIGNAL stopSignal := syscall.SIGTERM signalString := data.ContainerConfig.StopSignal if c.IsSet("stop-signal") { signalString = c.String("stop-signal") } if signalString != "" { stopSignal, err = signal.ParseSignal(signalString) if err != nil { return nil, err } } // ENVIRONMENT VARIABLES env := defaultEnvVariables for _, e := range data.ContainerConfig.Env { split := strings.SplitN(e, "=", 2) if len(split) > 1 { env[split[0]] = split[1] } else { env[split[0]] = "" } } if err := readKVStrings(env, c.StringSlice("env-file"), c.StringSlice("env")); err != nil { return nil, errors.Wrapf(err, "unable to process environment variables") } // LABEL VARIABLES labels, err := getAllLabels(c.StringSlice("label-file"), c.StringSlice("label")) if err != nil { return nil, errors.Wrapf(err, "unable to process labels") } for key, val := range data.ContainerConfig.Labels { if _, ok := labels[key]; !ok { labels[key] = val } } // ANNOTATIONS annotations := make(map[string]string) // First, add our default annotations annotations[ann.ContainerType] = "sandbox" annotations[ann.TTY] = "false" if tty { annotations[ann.TTY] = "true" } // Next, add annotations from the image for key, value := range data.Annotations { annotations[key] = value } // Last, add user annotations for _, annotation := range c.StringSlice("annotation") { splitAnnotation := strings.SplitN(annotation, "=", 2) if len(splitAnnotation) < 2 { return nil, errors.Errorf("Annotations must be formatted KEY=VALUE") } annotations[splitAnnotation[0]] = splitAnnotation[1] } // WORKING DIRECTORY workDir := "/" if c.IsSet("workdir") || c.IsSet("w") { workDir = c.String("workdir") } else if data.ContainerConfig.WorkingDir != "" { workDir = data.ContainerConfig.WorkingDir } // ENTRYPOINT // User input entrypoint takes priority over image entrypoint entrypoint := c.StringSlice("entrypoint") if len(entrypoint) == 0 { entrypoint = data.ContainerConfig.Entrypoint } // if entrypoint=, we need to clear the entrypoint if len(entrypoint) == 1 && c.IsSet("entrypoint") && strings.Join(c.StringSlice("entrypoint"), "") == "" { entrypoint = []string{} } // Build the command // If we have an entry point, it goes first if len(entrypoint) > 0 { command = entrypoint } if len(inputCommand) > 0 { // User command overrides data CMD command = append(command, inputCommand...) } else if len(data.ContainerConfig.Cmd) > 0 && !c.IsSet("entrypoint") { // If not user command, add CMD command = append(command, data.ContainerConfig.Cmd...) } if len(command) == 0 { return nil, errors.Errorf("No command specified on command line or as CMD or ENTRYPOINT in this image") } // EXPOSED PORTS portBindings, err := cc.ExposedPorts(c.StringSlice("expose"), c.StringSlice("publish"), c.Bool("publish-all"), data.ContainerConfig.ExposedPorts) if err != nil { return nil, err } // SHM Size shmSize, err := units.FromHumanSize(c.String("shm-size")) if err != nil { return nil, errors.Wrapf(err, "unable to translate --shm-size") } // Network netMode := container.NetworkMode(c.String("network")) // Make sure if network is set to container namespace, port binding is not also being asked for if netMode.IsContainer() { if len(c.StringSlice("publish")) > 0 || c.Bool("publish-all") { return nil, errors.Errorf("cannot set port bindings on an existing container network namespace") } } // Verify the additional hosts are in correct format for _, host := range c.StringSlice("add-host") { if _, err := validateExtraHost(host); err != nil { return nil, err } } // Check for . and dns-search domains if util.StringInSlice(".", c.StringSlice("dns-search")) && len(c.StringSlice("dns-search")) > 1 { return nil, errors.Errorf("cannot pass additional search domains when also specifying '.'") } // Validate domains are good for _, dom := range c.StringSlice("dns-search") { if _, err := validateDomain(dom); err != nil { return nil, err } } ImageVolumes := data.ContainerConfig.Volumes var imageVolType = map[string]string{ "bind": "", "tmpfs": "", "ignore": "", } if _, ok := imageVolType[c.String("image-volume")]; !ok { return nil, errors.Errorf("invalid image-volume type %q. Pick one of bind, tmpfs, or ignore", c.String("image-volume")) } config := &cc.CreateConfig{ Runtime: runtime, Annotations: annotations, BuiltinImgVolumes: ImageVolumes, ConmonPidFile: c.String("conmon-pidfile"), ImageVolumeType: c.String("image-volume"), CapAdd: c.StringSlice("cap-add"), CapDrop: c.StringSlice("cap-drop"), CgroupParent: c.String("cgroup-parent"), Command: command, Detach: c.Bool("detach"), Devices: c.StringSlice("device"), DNSOpt: c.StringSlice("dns-opt"), DNSSearch: c.StringSlice("dns-search"), DNSServers: c.StringSlice("dns"), Entrypoint: entrypoint, Env: env, //ExposedPorts: ports, GroupAdd: c.StringSlice("group-add"), Hostname: c.String("hostname"), HostAdd: c.StringSlice("add-host"), IDMappings: idmappings, Image: imageName, ImageID: imageID, Interactive: c.Bool("interactive"), IP6Address: c.String("ipv6"), IPAddress: c.String("ip"), Labels: labels, LinkLocalIP: c.StringSlice("link-local-ip"), LogDriver: c.String("log-driver"), LogDriverOpt: c.StringSlice("log-opt"), MacAddress: c.String("mac-address"), Name: c.String("name"), Network: c.String("network"), NetworkAlias: c.StringSlice("network-alias"), IpcMode: ipcMode, NetMode: netMode, UtsMode: utsMode, PidMode: pidMode, Pod: c.String("pod"), Privileged: c.Bool("privileged"), Publish: c.StringSlice("publish"), PublishAll: c.Bool("publish-all"), PortBindings: portBindings, Quiet: c.Bool("quiet"), ReadOnlyRootfs: c.Bool("read-only"), Resources: cc.CreateResourceConfig{ BlkioWeight: blkioWeight, BlkioWeightDevice: c.StringSlice("blkio-weight-device"), CPUShares: c.Uint64("cpu-shares"), CPUPeriod: c.Uint64("cpu-period"), CPUsetCPUs: c.String("cpuset-cpus"), CPUsetMems: c.String("cpuset-mems"), CPUQuota: c.Int64("cpu-quota"), CPURtPeriod: c.Uint64("cpu-rt-period"), CPURtRuntime: c.Int64("cpu-rt-runtime"), CPUs: c.Float64("cpus"), DeviceReadBps: c.StringSlice("device-read-bps"), DeviceReadIOps: c.StringSlice("device-read-iops"), DeviceWriteBps: c.StringSlice("device-write-bps"), DeviceWriteIOps: c.StringSlice("device-write-iops"), DisableOomKiller: c.Bool("oom-kill-disable"), ShmSize: shmSize, Memory: memoryLimit, MemoryReservation: memoryReservation, MemorySwap: memorySwap, MemorySwappiness: c.Int("memory-swappiness"), KernelMemory: memoryKernel, OomScoreAdj: c.Int("oom-score-adj"), PidsLimit: c.Int64("pids-limit"), Ulimit: c.StringSlice("ulimit"), }, Rm: c.Bool("rm"), ShmDir: shmDir, StopSignal: stopSignal, StopTimeout: c.Uint("stop-timeout"), Sysctl: sysctl, Tmpfs: c.StringSlice("tmpfs"), Tty: tty, User: user, UsernsMode: usernsMode, Volumes: c.StringSlice("volume"), WorkDir: workDir, } if !config.Privileged { if err := parseSecurityOpt(config, c.StringSlice("security-opt")); err != nil { return nil, err } } config.SecurityOpts = c.StringSlice("security-opt") warnings, err := verifyContainerResources(config, false) if err != nil { return nil, err } for _, warning := range warnings { fmt.Fprintln(os.Stderr, warning) } return config, nil }