package shared import ( "context" "encoding/json" "fmt" "github.com/containers/libpod/pkg/errorhandling" "io" "os" "path/filepath" "strconv" "strings" "syscall" "time" "github.com/containers/image/manifest" "github.com/containers/libpod/cmd/podman/shared/parse" "github.com/containers/libpod/libpod" "github.com/containers/libpod/libpod/image" ann "github.com/containers/libpod/pkg/annotations" "github.com/containers/libpod/pkg/inspect" ns "github.com/containers/libpod/pkg/namespaces" "github.com/containers/libpod/pkg/rootless" cc "github.com/containers/libpod/pkg/spec" "github.com/containers/libpod/pkg/util" "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/opentracing/opentracing-go" "github.com/pkg/errors" "github.com/sirupsen/logrus" ) func CreateContainer(ctx context.Context, c *GenericCLIResults, runtime *libpod.Runtime) (*libpod.Container, *cc.CreateConfig, error) { var ( healthCheck *manifest.Schema2HealthConfig err error cidFile *os.File ) if c.Bool("trace") { span, _ := opentracing.StartSpanFromContext(ctx, "createContainer") defer span.Finish() } if c.Bool("rm") && c.String("restart") != "" && c.String("restart") != "no" { return nil, nil, errors.Errorf("the --rm option conflicts with --restart") } rtc, err := runtime.GetConfig() if err != nil { return nil, nil, err } rootfs := "" if c.Bool("rootfs") { rootfs = c.InputArgs[0] } if c.IsSet("cidfile") && os.Geteuid() == 0 { cidFile, err = util.OpenExclusiveFile(c.String("cidfile")) if err != nil && os.IsExist(err) { return nil, nil, errors.Errorf("container id file exists. Ensure another container is not using it or delete %s", c.String("cidfile")) } if err != nil { return nil, nil, errors.Errorf("error opening cidfile %s", c.String("cidfile")) } defer errorhandling.CloseQuiet(cidFile) defer errorhandling.SyncQuiet(cidFile) } imageName := "" var data *inspect.ImageData = nil // Set the storage if we are running as euid == 0 and there is no rootfs specified if rootfs == "" && os.Geteuid() == 0 { var writer io.Writer if !c.Bool("quiet") { writer = os.Stderr } newImage, err := runtime.ImageRuntime().New(ctx, c.InputArgs[0], rtc.SignaturePolicyPath, GetAuthFile(""), writer, nil, image.SigningOptions{}, false, nil) if err != nil { return nil, nil, err } data, err = newImage.Inspect(ctx) if err != nil { return nil, nil, err } names := newImage.Names() if len(names) > 0 { imageName = names[0] } else { imageName = newImage.ID() } // if the user disabled the healthcheck with "none", we skip adding it healthCheckCommandInput := c.String("healthcheck-command") // the user didnt disable the healthcheck but did pass in a healthcheck command // now we need to make a healthcheck from the commandline input if healthCheckCommandInput != "none" { if len(healthCheckCommandInput) > 0 { healthCheck, err = makeHealthCheckFromCli(c) if err != nil { return nil, nil, errors.Wrapf(err, "unable to create healthcheck") } } else { // the user did not disable the health check and did not pass in a healthcheck // command as input. so now we add healthcheck if it exists AND is correct mediatype _, mediaType, err := newImage.Manifest(ctx) if err != nil { return nil, nil, errors.Wrapf(err, "unable to determine mediatype of image %s", newImage.ID()) } if mediaType == manifest.DockerV2Schema2MediaType { healthCheck, err = newImage.GetHealthCheck(ctx) if err != nil { return nil, nil, errors.Wrapf(err, "unable to get healthcheck for %s", c.InputArgs[0]) } if healthCheck != nil { hcCommand := healthCheck.Test if len(hcCommand) < 1 || hcCommand[0] == "" || hcCommand[0] == "NONE" { // disable health check healthCheck = nil } else { // apply defaults if image doesn't override them if healthCheck.Interval == 0 { healthCheck.Interval = 30 * time.Second } if healthCheck.Timeout == 0 { healthCheck.Timeout = 30 * time.Second } /* Docker default is 0s, so the following would be a no-op if healthCheck.StartPeriod == 0 { healthCheck.StartPeriod = 0 * time.Second } */ if healthCheck.Retries == 0 { healthCheck.Retries = 3 } } } } } } } createConfig, err := ParseCreateOpts(ctx, c, runtime, imageName, data) if err != nil { return nil, nil, err } // Because parseCreateOpts does derive anything from the image, we add health check // at this point. The rest is done by WithOptions. createConfig.HealthCheck = healthCheck // TODO: Should be able to return this from ParseCreateOpts var pod *libpod.Pod if createConfig.Pod != "" { pod, err = runtime.LookupPod(createConfig.Pod) if err != nil { return nil, nil, errors.Wrapf(err, "error looking up pod to join") } } ctr, err := CreateContainerFromCreateConfig(runtime, createConfig, ctx, pod) if err != nil { return nil, nil, err } if cidFile != nil { _, err = cidFile.WriteString(ctr.ID()) if err != nil { logrus.Error(err) } } logrus.Debugf("New container created %q", ctr.ID()) return ctr, createConfig, nil } func parseSecurityOpt(config *cc.CreateConfig, securityOpts []string, runtime *libpod.Runtime) error { var ( labelOpts []string ) if config.PidMode.IsHost() { labelOpts = append(labelOpts, label.DisableSecOpt()...) } else if config.PidMode.IsContainer() { ctr, err := runtime.LookupContainer(config.PidMode.Container()) if err != nil { return errors.Wrapf(err, "container %q not found", config.PidMode.Container()) } secopts, err := label.DupSecOpt(ctr.ProcessLabel()) if err != nil { return errors.Wrapf(err, "failed to duplicate label %q ", ctr.ProcessLabel()) } labelOpts = append(labelOpts, secopts...) } if config.IpcMode.IsHost() { labelOpts = append(labelOpts, label.DisableSecOpt()...) } else if config.IpcMode.IsContainer() { ctr, err := runtime.LookupContainer(config.IpcMode.Container()) if err != nil { return errors.Wrapf(err, "container %q not found", config.IpcMode.Container()) } secopts, err := label.DupSecOpt(ctr.ProcessLabel()) if err != nil { return errors.Wrapf(err, "failed to duplicate label %q ", ctr.ProcessLabel()) } labelOpts = append(labelOpts, secopts...) } 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.LabelOpts = labelOpts return nil } func configureEntrypoint(c *GenericCLIResults, data *inspect.ImageData) []string { entrypoint := []string{} if c.IsSet("entrypoint") { // Force entrypoint to "" if c.String("entrypoint") == "" { return entrypoint } // Check if entrypoint specified is json if err := json.Unmarshal([]byte(c.String("entrypoint")), &entrypoint); err == nil { return entrypoint } // Return entrypoint as a single command return []string{c.String("entrypoint")} } if data != nil { return data.Config.Entrypoint } return entrypoint } func configurePod(c *GenericCLIResults, runtime *libpod.Runtime, namespaces map[string]string, podName string) (map[string]string, error) { pod, err := runtime.LookupPod(podName) if err != nil { return namespaces, err } podInfraID, err := pod.InfraContainerID() if err != nil { return namespaces, err } if (namespaces["pid"] == cc.Pod) || (!c.IsSet("pid") && pod.SharesPID()) { namespaces["pid"] = fmt.Sprintf("container:%s", podInfraID) } if (namespaces["net"] == cc.Pod) || (!c.IsSet("net") && !c.IsSet("network") && pod.SharesNet()) { namespaces["net"] = fmt.Sprintf("container:%s", podInfraID) } if (namespaces["user"] == cc.Pod) || (!c.IsSet("user") && pod.SharesUser()) { namespaces["user"] = fmt.Sprintf("container:%s", podInfraID) } if (namespaces["ipc"] == cc.Pod) || (!c.IsSet("ipc") && pod.SharesIPC()) { namespaces["ipc"] = fmt.Sprintf("container:%s", podInfraID) } if (namespaces["uts"] == cc.Pod) || (!c.IsSet("uts") && pod.SharesUTS()) { namespaces["uts"] = fmt.Sprintf("container:%s", podInfraID) } return namespaces, nil } // 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 *GenericCLIResults, runtime *libpod.Runtime, imageName string, data *inspect.ImageData) (*cc.CreateConfig, error) { var ( inputCommand, command []string memoryLimit, memoryReservation, memorySwap, memoryKernel int64 blkioWeight uint16 namespaces map[string]string ) idmappings, err := util.ParseIDMapping(ns.UsernsMode(c.String("userns")), c.StringSlice("uidmap"), c.StringSlice("gidmap"), c.String("subuidname"), c.String("subgidname")) if err != nil { return nil, err } if c.String("mac-address") != "" { return nil, errors.Errorf("--mac-address option not currently supported") } imageID := "" inputCommand = c.InputArgs[1:] if data != nil { imageID = data.ID } rootfs := "" if c.Bool("rootfs") { rootfs = c.InputArgs[0] } 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) } tty := c.Bool("tty") if c.Changed("cpu-period") && c.Changed("cpus") { return nil, errors.Errorf("--cpu-period and --cpus cannot be set together") } if c.Changed("cpu-quota") && c.Changed("cpus") { return nil, errors.Errorf("--cpu-quota and --cpus cannot be set together") } if c.Bool("no-hosts") && c.Changed("add-host") { return nil, errors.Errorf("--no-hosts and --add-host cannot be set together") } // EXPOSED PORTS var portBindings map[nat.Port][]nat.PortBinding if data != nil { portBindings, err = cc.ExposedPorts(c.StringSlice("expose"), c.StringSlice("publish"), c.Bool("publish-all"), data.Config.ExposedPorts) if err != nil { return nil, err } } // Kernel Namespaces // TODO Fix handling of namespace from pod // Instead of integrating here, should be done in libpod // However, that also involves setting up security opts // when the pod's namespace is integrated namespaceNet := c.String("network") if c.Changed("net") { namespaceNet = c.String("net") } namespaces = map[string]string{ "cgroup": c.String("cgroupns"), "pid": c.String("pid"), "net": namespaceNet, "ipc": c.String("ipc"), "user": c.String("userns"), "uts": c.String("uts"), } originalPodName := c.String("pod") podName := strings.Replace(originalPodName, "new:", "", 1) // after we strip out :new, make sure there is something left for a pod name if len(podName) < 1 && c.IsSet("pod") { return nil, errors.Errorf("new pod name must be at least one character") } if c.IsSet("pod") { if strings.HasPrefix(originalPodName, "new:") { // pod does not exist; lets make it var podOptions []libpod.PodCreateOption podOptions = append(podOptions, libpod.WithPodName(podName), libpod.WithInfraContainer(), libpod.WithPodCgroups()) if len(portBindings) > 0 { ociPortBindings, err := cc.NatToOCIPortBindings(portBindings) if err != nil { return nil, err } podOptions = append(podOptions, libpod.WithInfraContainerPorts(ociPortBindings)) } podNsOptions, err := GetNamespaceOptions(strings.Split(DefaultKernelNamespaces, ",")) if err != nil { return nil, err } podOptions = append(podOptions, podNsOptions...) // make pod pod, err := runtime.NewPod(ctx, podOptions...) if err != nil { return nil, err } logrus.Debugf("pod %s created by new container request", pod.ID()) // The container now cannot have port bindings; so we reset the map portBindings = make(map[nat.Port][]nat.PortBinding) } namespaces, err = configurePod(c, runtime, namespaces, podName) if err != nil { return nil, err } } pidMode := ns.PidMode(namespaces["pid"]) if !cc.Valid(string(pidMode), pidMode) { return nil, errors.Errorf("--pid %q is not valid", c.String("pid")) } usernsMode := ns.UsernsMode(namespaces["user"]) if !cc.Valid(string(usernsMode), usernsMode) { return nil, errors.Errorf("--userns %q is not valid", namespaces["user"]) } utsMode := ns.UTSMode(namespaces["uts"]) if !cc.Valid(string(utsMode), utsMode) { return nil, errors.Errorf("--uts %q is not valid", namespaces["uts"]) } cgroupMode := ns.CgroupMode(namespaces["cgroup"]) if !cgroupMode.Valid() { return nil, errors.Errorf("--cgroup %q is not valid", namespaces["cgroup"]) } ipcMode := ns.IpcMode(namespaces["ipc"]) if !cc.Valid(string(ipcMode), ipcMode) { return nil, errors.Errorf("--ipc %q is not valid", ipcMode) } // Make sure if network is set to container namespace, port binding is not also being asked for netMode := ns.NetworkMode(namespaces["net"]) if netMode.IsContainer() { if len(portBindings) > 0 { return nil, errors.Errorf("cannot set port bindings on an existing container network namespace") } } // USER user := c.String("user") if user == "" { if usernsMode.IsKeepID() { user = fmt.Sprintf("%d:%d", rootless.GetRootlessUID(), rootless.GetRootlessGID()) } else if data == nil { user = "0" } else { user = data.Config.User } } // STOP SIGNAL stopSignal := syscall.SIGTERM signalString := "" if data != nil { signalString = data.Config.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 := EnvVariablesFromData(data) if c.Bool("env-host") { for _, e := range os.Environ() { pair := strings.SplitN(e, "=", 2) if _, ok := env[pair[0]]; !ok { if len(pair) > 1 { env[pair[0]] = pair[1] } } } } if err := parse.ReadKVStrings(env, c.StringSlice("env-file"), c.StringArray("env")); err != nil { return nil, errors.Wrapf(err, "unable to process environment variables") } // LABEL VARIABLES labels, err := GetAllLabels(c.StringSlice("label-file"), c.StringArray("label")) if err != nil { return nil, errors.Wrapf(err, "unable to process labels") } if data != nil { for key, val := range data.Config.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" } if data != nil { // 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") { workDir = c.String("workdir") } else if data != nil && data.Config.WorkingDir != "" { workDir = data.Config.WorkingDir } entrypoint := configureEntrypoint(c, data) // 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 data != nil && len(data.Config.Cmd) > 0 && !c.IsSet("entrypoint") { // If not user command, add CMD command = append(command, data.Config.Cmd...) } if data != nil && len(command) == 0 { return nil, errors.Errorf("No command specified on command line or as CMD or ENTRYPOINT in this image") } // SHM Size shmSize, err := units.FromHumanSize(c.String("shm-size")) if err != nil { return nil, errors.Wrapf(err, "unable to translate --shm-size") } // Verify the additional hosts are in correct format for _, host := range c.StringSlice("add-host") { if _, err := parse.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 := parse.ValidateDomain(dom); err != nil { return nil, err } } var ImageVolumes map[string]struct{} if data != nil && c.String("image-volume") != "ignore" { ImageVolumes = data.Config.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")) } var systemd bool if command != nil && c.Bool("systemd") && ((filepath.Base(command[0]) == "init") || (filepath.Base(command[0]) == "systemd")) { systemd = true if signalString == "" { stopSignal, err = signal.ParseSignal("RTMIN+3") if err != nil { return nil, errors.Wrapf(err, "error parsing systemd signal") } } } // This is done because cobra cannot have two aliased flags. So we have to check // both network := c.String("network") if c.Changed("net") { network = c.String("net") } memorySwappiness := c.Int64("memory-swappiness") logDriver := libpod.KubernetesLogging if c.Changed("log-driver") { logDriver = c.String("log-driver") } config := &cc.CreateConfig{ Annotations: annotations, BuiltinImgVolumes: ImageVolumes, ConmonPidFile: c.String("conmon-pidfile"), ImageVolumeType: c.String("image-volume"), CapAdd: c.StringSlice("cap-add"), CapDrop: c.StringSlice("cap-drop"), CidFile: c.String("cidfile"), Cgroupns: c.String("cgroupns"), 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"), HTTPProxy: c.Bool("http-proxy"), NoHosts: c.Bool("no-hosts"), IDMappings: idmappings, Init: c.Bool("init"), InitPath: c.String("init-path"), Image: imageName, ImageID: imageID, Interactive: c.Bool("interactive"), //IP6Address: c.String("ipv6"), // Not implemented yet - needs CNI support for static v6 IPAddress: c.String("ip"), Labels: labels, //LinkLocalIP: c.StringSlice("link-local-ip"), // Not implemented yet LogDriver: logDriver, LogDriverOpt: c.StringSlice("log-opt"), MacAddress: c.String("mac-address"), Name: c.String("name"), Network: network, //NetworkAlias: c.StringSlice("network-alias"), // Not implemented - does this make sense in Podman? IpcMode: ipcMode, NetMode: netMode, UtsMode: utsMode, PidMode: pidMode, CgroupMode: cgroupMode, Pod: podName, Privileged: c.Bool("privileged"), Publish: c.StringSlice("publish"), PublishAll: c.Bool("publish-all"), PortBindings: portBindings, Quiet: c.Bool("quiet"), ReadOnlyRootfs: c.Bool("read-only"), ReadOnlyTmpfs: c.Bool("read-only-tmpfs"), 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: int(memorySwappiness), KernelMemory: memoryKernel, OomScoreAdj: c.Int("oom-score-adj"), PidsLimit: c.Int64("pids-limit"), Ulimit: c.StringSlice("ulimit"), }, RestartPolicy: c.String("restart"), Rm: c.Bool("rm"), StopSignal: stopSignal, StopTimeout: c.Uint("stop-timeout"), Sysctl: sysctl, Systemd: systemd, Tmpfs: c.StringArray("tmpfs"), Tty: tty, User: user, UsernsMode: usernsMode, MountsFlag: c.StringArray("mount"), Volumes: c.StringArray("volume"), WorkDir: workDir, Rootfs: rootfs, VolumesFrom: c.StringSlice("volumes-from"), Syslog: c.Bool("syslog"), } if config.Privileged { config.LabelOpts = label.DisableSecOpt() } else { if err := parseSecurityOpt(config, c.StringArray("security-opt"), runtime); err != nil { return nil, err } } config.SecurityOpts = c.StringArray("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 } func CreateContainerFromCreateConfig(r *libpod.Runtime, createConfig *cc.CreateConfig, ctx context.Context, pod *libpod.Pod) (*libpod.Container, error) { runtimeSpec, options, err := createConfig.MakeContainerConfig(r, pod) if err != nil { return nil, err } ctr, err := r.NewContainer(ctx, runtimeSpec, options...) if err != nil { return nil, err } return ctr, nil } var defaultEnvVariables = map[string]string{ "PATH": "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin", "TERM": "xterm", } // EnvVariablesFromData gets sets the default environment variables // for containers, and reads the variables from the image data, if present. func EnvVariablesFromData(data *inspect.ImageData) map[string]string { env := defaultEnvVariables if data != nil { for _, e := range data.Config.Env { split := strings.SplitN(e, "=", 2) if len(split) > 1 { env[split[0]] = split[1] } else { env[split[0]] = "" } } } return env } func makeHealthCheckFromCli(c *GenericCLIResults) (*manifest.Schema2HealthConfig, error) { inCommand := c.String("healthcheck-command") inInterval := c.String("healthcheck-interval") inRetries := c.Uint("healthcheck-retries") inTimeout := c.String("healthcheck-timeout") inStartPeriod := c.String("healthcheck-start-period") // Every healthcheck requires a command if len(inCommand) == 0 { return nil, errors.New("Must define a healthcheck command for all healthchecks") } // first try to parse option value as JSON array of strings... cmd := []string{} err := json.Unmarshal([]byte(inCommand), &cmd) if err != nil { // ...otherwise pass it to "/bin/sh -c" inside the container cmd = []string{"CMD-SHELL", inCommand} } hc := manifest.Schema2HealthConfig{ Test: cmd, } if inInterval == "disable" { inInterval = "0" } intervalDuration, err := time.ParseDuration(inInterval) if err != nil { return nil, errors.Wrapf(err, "invalid healthcheck-interval %s ", inInterval) } hc.Interval = intervalDuration if inRetries < 1 { return nil, errors.New("healthcheck-retries must be greater than 0.") } hc.Retries = int(inRetries) timeoutDuration, err := time.ParseDuration(inTimeout) if err != nil { return nil, errors.Wrapf(err, "invalid healthcheck-timeout %s", inTimeout) } if timeoutDuration < time.Duration(time.Second*1) { return nil, errors.New("healthcheck-timeout must be at least 1 second") } hc.Timeout = timeoutDuration startPeriodDuration, err := time.ParseDuration(inStartPeriod) if err != nil { return nil, errors.Wrapf(err, "invalid healthcheck-start-period %s", inStartPeriod) } if startPeriodDuration < time.Duration(0) { return nil, errors.New("healthcheck-start-period must be 0 seconds or greater") } hc.StartPeriod = startPeriodDuration return &hc, nil }