package main import ( "context" "encoding/json" "strings" specs "github.com/opencontainers/runtime-spec/specs-go" "github.com/pkg/errors" "github.com/projectatomic/libpod/cmd/podman/formats" "github.com/projectatomic/libpod/libpod" "github.com/projectatomic/libpod/pkg/inspect" "github.com/projectatomic/libpod/pkg/util" "github.com/sirupsen/logrus" "github.com/urfave/cli" ) const ( inspectTypeContainer = "container" inspectTypeImage = "image" inspectAll = "all" ) var ( inspectFlags = []cli.Flag{ cli.StringFlag{ Name: "type, t", Value: inspectAll, Usage: "Return JSON for specified type, (e.g image, container or task)", }, cli.StringFlag{ Name: "format, f", Usage: "Change the output format to a Go template", }, cli.BoolFlag{ Name: "size", Usage: "Display total file size if the type is container", }, LatestFlag, } inspectDescription = "This displays the low-level information on containers and images identified by name or ID. By default, this will render all results in a JSON array. If the container and image have the same name, this will return container JSON for unspecified type." inspectCommand = cli.Command{ Name: "inspect", Usage: "Displays the configuration of a container or image", Description: inspectDescription, Flags: inspectFlags, Action: inspectCmd, ArgsUsage: "CONTAINER-OR-IMAGE [CONTAINER-OR-IMAGE]...", } ) func inspectCmd(c *cli.Context) error { args := c.Args() inspectType := c.String("type") latestContainer := c.Bool("latest") if len(args) == 0 && !latestContainer { return errors.Errorf("container or image name must be specified: podman inspect [options [...]] name") } if len(args) > 0 && latestContainer { return errors.Errorf("you cannot provide additional arguements with --latest") } if err := validateFlags(c, inspectFlags); err != nil { return err } runtime, err := getRuntime(c) if err != nil { return errors.Wrapf(err, "error creating libpod runtime") } defer runtime.Shutdown(false) if !util.StringInSlice(inspectType, []string{inspectTypeContainer, inspectTypeImage, inspectAll}) { return errors.Errorf("the only recognized types are %q, %q, and %q", inspectTypeContainer, inspectTypeImage, inspectAll) } outputFormat := c.String("format") if strings.Contains(outputFormat, "{{.Id}}") { outputFormat = strings.Replace(outputFormat, "{{.Id}}", formats.IDString, -1) } if latestContainer { lc, err := runtime.GetLatestContainer() if err != nil { return err } args = append(args, lc.ID()) inspectType = inspectTypeContainer } inspectedObjects, iterateErr := iterateInput(getContext(), c, args, runtime, inspectType) var out formats.Writer if outputFormat != "" && outputFormat != formats.JSONString { //template out = formats.StdoutTemplateArray{Output: inspectedObjects, Template: outputFormat} } else { // default is json output out = formats.JSONStructArray{Output: inspectedObjects} } formats.Writer(out).Out() return iterateErr } // func iterateInput iterates the images|containers the user has requested and returns the inspect data and error func iterateInput(ctx context.Context, c *cli.Context, args []string, runtime *libpod.Runtime, inspectType string) ([]interface{}, error) { var ( data interface{} inspectedItems []interface{} inspectError error ) for _, input := range args { switch inspectType { case inspectTypeContainer: ctr, err := runtime.LookupContainer(input) if err != nil { inspectError = errors.Wrapf(err, "error looking up container %q", input) break } libpodInspectData, err := ctr.Inspect(c.Bool("size")) if err != nil { inspectError = errors.Wrapf(err, "error getting libpod container inspect data %q", ctr.ID) break } data, err = getCtrInspectInfo(ctr, libpodInspectData) if err != nil { inspectError = errors.Wrapf(err, "error parsing container data %q", ctr.ID()) break } case inspectTypeImage: image, err := runtime.ImageRuntime().NewFromLocal(input) if err != nil { inspectError = errors.Wrapf(err, "error getting image %q", input) break } data, err = image.Inspect(ctx) if err != nil { inspectError = errors.Wrapf(err, "error parsing image data %q", image.ID()) break } case inspectAll: ctr, err := runtime.LookupContainer(input) if err != nil { image, err := runtime.ImageRuntime().NewFromLocal(input) if err != nil { inspectError = errors.Wrapf(err, "error getting image %q", input) break } data, err = image.Inspect(ctx) if err != nil { inspectError = errors.Wrapf(err, "error parsing image data %q", image.ID()) break } } else { libpodInspectData, err := ctr.Inspect(c.Bool("size")) if err != nil { inspectError = errors.Wrapf(err, "error getting libpod container inspect data %q", ctr.ID) break } data, err = getCtrInspectInfo(ctr, libpodInspectData) if err != nil { inspectError = errors.Wrapf(err, "error parsing container data %q", ctr.ID) break } } } if inspectError == nil { inspectedItems = append(inspectedItems, data) } } return inspectedItems, inspectError } func getCtrInspectInfo(ctr *libpod.Container, ctrInspectData *inspect.ContainerInspectData) (*inspect.ContainerData, error) { config := ctr.Config() spec := config.Spec cpus, mems, period, quota, realtimePeriod, realtimeRuntime, shares := getCPUInfo(spec) blkioWeight, blkioWeightDevice, blkioReadBps, blkioWriteBps, blkioReadIOPS, blkioeWriteIOPS := getBLKIOInfo(spec) memKernel, memReservation, memSwap, memSwappiness, memDisableOOMKiller := getMemoryInfo(spec) pidsLimit := getPidsInfo(spec) cgroup := getCgroup(spec) var createArtifact createConfig artifact, err := ctr.GetArtifact("create-config") if err == nil { if err := json.Unmarshal(artifact, &createArtifact); err != nil { return nil, err } } else { logrus.Errorf("couldn't get some inspect information, error getting artifact %q: %v", ctr.ID(), err) } data := &inspect.ContainerData{ ctrInspectData, &inspect.HostConfig{ ConsoleSize: spec.Process.ConsoleSize, OomScoreAdj: spec.Process.OOMScoreAdj, CPUShares: shares, BlkioWeight: blkioWeight, BlkioWeightDevice: blkioWeightDevice, BlkioDeviceReadBps: blkioReadBps, BlkioDeviceWriteBps: blkioWriteBps, BlkioDeviceReadIOps: blkioReadIOPS, BlkioDeviceWriteIOps: blkioeWriteIOPS, CPUPeriod: period, CPUQuota: quota, CPURealtimePeriod: realtimePeriod, CPURealtimeRuntime: realtimeRuntime, CPUSetCPUs: cpus, CPUSetMems: mems, Devices: spec.Linux.Devices, KernelMemory: memKernel, MemoryReservation: memReservation, MemorySwap: memSwap, MemorySwappiness: memSwappiness, OomKillDisable: memDisableOOMKiller, PidsLimit: pidsLimit, Privileged: config.Privileged, ReadonlyRootfs: spec.Root.Readonly, Runtime: ctr.RuntimeName(), NetworkMode: string(createArtifact.NetMode), IpcMode: string(createArtifact.IpcMode), Cgroup: cgroup, UTSMode: string(createArtifact.UtsMode), UsernsMode: createArtifact.NsUser, GroupAdd: spec.Process.User.AdditionalGids, ContainerIDFile: createArtifact.CidFile, AutoRemove: createArtifact.Rm, CapAdd: createArtifact.CapAdd, CapDrop: createArtifact.CapDrop, DNS: createArtifact.DNSServers, DNSOptions: createArtifact.DNSOpt, DNSSearch: createArtifact.DNSSearch, PidMode: string(createArtifact.PidMode), CgroupParent: createArtifact.CgroupParent, ShmSize: createArtifact.Resources.ShmSize, Memory: createArtifact.Resources.Memory, Ulimits: createArtifact.Resources.Ulimit, SecurityOpt: createArtifact.SecurityOpts, Tmpfs: createArtifact.Tmpfs, }, &inspect.CtrConfig{ Hostname: spec.Hostname, User: spec.Process.User, Env: spec.Process.Env, Image: config.RootfsImageName, WorkingDir: spec.Process.Cwd, Labels: config.Labels, Annotations: spec.Annotations, Tty: spec.Process.Terminal, OpenStdin: config.Stdin, StopSignal: config.StopSignal, Cmd: config.Spec.Process.Args, Entrypoint: strings.Join(createArtifact.Entrypoint, " "), }, } return data, nil } func getCPUInfo(spec *specs.Spec) (string, string, *uint64, *int64, *uint64, *int64, *uint64) { if spec.Linux.Resources == nil { return "", "", nil, nil, nil, nil, nil } cpu := spec.Linux.Resources.CPU if cpu == nil { return "", "", nil, nil, nil, nil, nil } return cpu.Cpus, cpu.Mems, cpu.Period, cpu.Quota, cpu.RealtimePeriod, cpu.RealtimeRuntime, cpu.Shares } func getBLKIOInfo(spec *specs.Spec) (*uint16, []specs.LinuxWeightDevice, []specs.LinuxThrottleDevice, []specs.LinuxThrottleDevice, []specs.LinuxThrottleDevice, []specs.LinuxThrottleDevice) { if spec.Linux.Resources == nil { return nil, nil, nil, nil, nil, nil } blkio := spec.Linux.Resources.BlockIO if blkio == nil { return nil, nil, nil, nil, nil, nil } return blkio.Weight, blkio.WeightDevice, blkio.ThrottleReadBpsDevice, blkio.ThrottleWriteBpsDevice, blkio.ThrottleReadIOPSDevice, blkio.ThrottleWriteIOPSDevice } func getMemoryInfo(spec *specs.Spec) (*int64, *int64, *int64, *uint64, *bool) { if spec.Linux.Resources == nil { return nil, nil, nil, nil, nil } memory := spec.Linux.Resources.Memory if memory == nil { return nil, nil, nil, nil, nil } return memory.Kernel, memory.Reservation, memory.Swap, memory.Swappiness, memory.DisableOOMKiller } func getPidsInfo(spec *specs.Spec) *int64 { if spec.Linux.Resources == nil { return nil } pids := spec.Linux.Resources.Pids if pids == nil { return nil } return &pids.Limit } func getCgroup(spec *specs.Spec) string { cgroup := "host" for _, ns := range spec.Linux.Namespaces { if ns.Type == specs.CgroupNamespace && ns.Path != "" { cgroup = "container" } } return cgroup }