package main import ( "encoding/json" 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/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", }, } 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", } ) func inspectCmd(c *cli.Context) error { args := c.Args() if len(args) == 0 { return errors.Errorf("container or image name must be specified: podman inspect [options [...]] name") } if len(args) > 1 { return errors.Errorf("too many arguments specified") } 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 c.String("type") != inspectTypeContainer && c.String("type") != inspectTypeImage && c.String("type") != inspectAll { return errors.Errorf("the only recognized types are %q, %q, and %q", inspectTypeContainer, inspectTypeImage, inspectAll) } name := args[0] outputFormat := c.String("format") var data interface{} switch c.String("type") { case inspectTypeContainer: ctr, err := runtime.LookupContainer(name) if err != nil { return errors.Wrapf(err, "error looking up container %q", name) } libpodInspectData, err := ctr.Inspect(c.Bool("size")) if err != nil { return errors.Wrapf(err, "error getting libpod container inspect data %q", ctr.ID) } data, err = getCtrInspectInfo(ctr, libpodInspectData) if err != nil { return errors.Wrapf(err, "error parsing container data %q", ctr.ID()) } case inspectTypeImage: image, err := runtime.GetImage(name) if err != nil { return errors.Wrapf(err, "error getting image %q", name) } data, err = runtime.GetImageInspectInfo(*image) if err != nil { return errors.Wrapf(err, "error parsing image data %q", image.ID) } case inspectAll: ctr, err := runtime.LookupContainer(name) if err != nil { image, err := runtime.GetImage(name) if err != nil { return errors.Wrapf(err, "error getting image %q", name) } data, err = runtime.GetImageInspectInfo(*image) if err != nil { return errors.Wrapf(err, "error parsing image data %q", image.ID) } } else { libpodInspectData, err := ctr.Inspect(c.Bool("size")) if err != nil { return errors.Wrapf(err, "error getting libpod container inspect data %q", ctr.ID) } data, err = getCtrInspectInfo(ctr, libpodInspectData) if err != nil { return errors.Wrapf(err, "error parsing container data %q", ctr.ID) } } } var out formats.Writer if outputFormat != "" && outputFormat != formats.JSONString { //template out = formats.StdoutTemplate{Output: data, Template: outputFormat} } else { // default is json output out = formats.JSONStruct{Output: data} } formats.Writer(out).Out() return nil } func getCtrInspectInfo(ctr *libpod.Container, ctrInspectData *libpod.ContainerInspectData) (*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 := &ContainerData{ CtrInspectData: ctrInspectData, HostConfig: &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: spec.Process.NoNewPrivileges, 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, }, Config: &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: 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 } // ContainerData holds the podman inspect data for a container type ContainerData struct { CtrInspectData *libpod.ContainerInspectData `json:"CtrInspectData"` HostConfig *HostConfig `json:"HostConfig"` Config *CtrConfig `json:"Config"` } // LogConfig holds the log information for a container type LogConfig struct { Type string `json:"Type"` // TODO Config map[string]string `json:"Config"` //idk type, TODO } // HostConfig represents the host configuration for the container type HostConfig struct { ContainerIDFile string `json:"ContainerIDFile"` LogConfig *LogConfig `json:"LogConfig"` //TODO NetworkMode string `json:"NetworkMode"` PortBindings map[string]struct{} `json:"PortBindings"` //TODO AutoRemove bool `json:"AutoRemove"` CapAdd []string `json:"CapAdd"` CapDrop []string `json:"CapDrop"` DNS []string `json:"DNS"` DNSOptions []string `json:"DNSOptions"` DNSSearch []string `json:"DNSSearch"` ExtraHosts []string `json:"ExtraHosts"` GroupAdd []uint32 `json:"GroupAdd"` IpcMode string `json:"IpcMode"` Cgroup string `json:"Cgroup"` OomScoreAdj *int `json:"OomScoreAdj"` PidMode string `json:"PidMode"` Privileged bool `json:"Privileged"` PublishAllPorts bool `json:"PublishAllPorts"` //TODO ReadonlyRootfs bool `json:"ReadonlyRootfs"` SecurityOpt []string `json:"SecurityOpt"` UTSMode string `json:"UTSMode"` UsernsMode string `json:"UsernsMode"` ShmSize string `json:"ShmSize"` Runtime string `json:"Runtime"` ConsoleSize *specs.Box `json:"ConsoleSize"` Isolation string `json:"Isolation"` //TODO CPUShares *uint64 `json:"CPUSShares"` Memory int64 `json:"Memory"` NanoCPUs int `json:"NanoCPUs"` //check type, TODO CgroupParent string `json:"CgroupParent"` BlkioWeight *uint16 `json:"BlkioWeight"` BlkioWeightDevice []specs.LinuxWeightDevice `json:"BlkioWeightDevice"` BlkioDeviceReadBps []specs.LinuxThrottleDevice `json:"BlkioDeviceReadBps"` BlkioDeviceWriteBps []specs.LinuxThrottleDevice `json:"BlkioDeviceWriteBps"` BlkioDeviceReadIOps []specs.LinuxThrottleDevice `json:"BlkioDeviceReadIOps"` BlkioDeviceWriteIOps []specs.LinuxThrottleDevice `json:"BlkioDeviceWriteIOps"` CPUPeriod *uint64 `json:"CPUPeriod"` CPUQuota *int64 `json:"CPUQuota"` CPURealtimePeriod *uint64 `json:"CPURealtimePeriod"` CPURealtimeRuntime *int64 `json:"CPURealtimeRuntime"` CPUSetCPUs string `json:"CPUSetCPUs"` CPUSetMems string `json:"CPUSetMems"` Devices []specs.LinuxDevice `json:"Devices"` DiskQuota int `json:"DiskQuota"` //check type, TODO KernelMemory *int64 `json:"KernelMemory"` MemoryReservation *int64 `json:"MemoryReservation"` MemorySwap *int64 `json:"MemorySwap"` MemorySwappiness *uint64 `json:"MemorySwappiness"` OomKillDisable *bool `json:"OomKillDisable"` PidsLimit *int64 `json:"PidsLimit"` Ulimits []string `json:"Ulimits"` CPUCount int `json:"CPUCount"` //check type, TODO CPUPercent int `json:"CPUPercent"` //check type, TODO IOMaximumIOps int `json:"IOMaximumIOps"` //check type, TODO IOMaximumBandwidth int `json:"IOMaximumBandwidth"` //check type, TODO } // CtrConfig holds information about the container configuration type CtrConfig struct { Hostname string `json:"Hostname"` DomainName string `json:"Domainname"` //TODO User specs.User `json:"User"` AttachStdin bool `json:"AttachStdin"` //TODO AttachStdout bool `json:"AttachStdout"` //TODO AttachStderr bool `json:"AttachStderr"` //TODO Tty bool `json:"Tty"` OpenStdin bool `json:"OpenStdin"` StdinOnce bool `json:"StdinOnce"` //TODO Env []string `json:"Env"` Cmd []string `json:"Cmd"` Image string `json:"Image"` Volumes map[string]struct{} `json:"Volumes"` WorkingDir string `json:"WorkingDir"` Entrypoint string `json:"Entrypoint"` Labels map[string]string `json:"Labels"` Annotations map[string]string `json:"Annotations"` StopSignal uint `json:"StopSignal"` }