package main import ( "fmt" "os" "strconv" "strings" "github.com/docker/go-units" "github.com/opencontainers/selinux/go-selinux/label" "github.com/pkg/errors" "github.com/projectatomic/libpod/libpod" "github.com/urfave/cli" pb "k8s.io/kubernetes/pkg/kubelet/apis/cri/v1alpha1/runtime" ) type mountType string // Type constants const ( // TypeBind is the type for mounting host dir TypeBind mountType = "bind" // TypeVolume is the type for remote storage volumes // TypeVolume mountType = "volume" // re-enable upon use // TypeTmpfs is the type for mounting tmpfs TypeTmpfs mountType = "tmpfs" ) var ( defaultEnvVariables = []string{"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin", "TERM=xterm"} ) type createResourceConfig struct { blkioDevice []string // blkio-weight-device blkioWeight uint16 // blkio-weight cpuPeriod uint64 // cpu-period cpuQuota int64 // cpu-quota cpuRtPeriod uint64 // cpu-rt-period cpuRtRuntime int64 // cpu-rt-runtime cpuShares uint64 // cpu-shares cpus string // cpus cpusetCpus string cpusetMems string // cpuset-mems deviceReadBps []string // device-read-bps deviceReadIops []string // device-read-iops deviceWriteBps []string // device-write-bps deviceWriteIops []string // device-write-iops disableOomKiller bool // oom-kill-disable kernelMemory int64 // kernel-memory memory int64 //memory memoryReservation int64 // memory-reservation memorySwap int64 //memory-swap memorySwapiness uint64 // memory-swappiness oomScoreAdj int //oom-score-adj pidsLimit int64 // pids-limit shmSize string ulimit []string //ulimit } type createConfig struct { args []string capAdd []string // cap-add capDrop []string // cap-drop cidFile string cgroupParent string // cgroup-parent command []string detach bool // detach devices []*pb.Device // device dnsOpt []string //dns-opt dnsSearch []string //dns-search dnsServers []string //dns entrypoint string //entrypoint env []string //env expose []string //expose groupAdd []uint32 // group-add hostname string //hostname image string interactive bool //interactive ip6Address string //ipv6 ipAddress string //ip labels map[string]string //label linkLocalIP []string // link-local-ip logDriver string // log-driver logDriverOpt []string // log-opt macAddress string //mac-address name string //name network string //network networkAlias []string //network-alias nsIPC string // ipc nsNet string //net nsPID string //pid nsUser string pod string //pod privileged bool //privileged publish []string //publish publishAll bool //publish-all readOnlyRootfs bool //read-only resources createResourceConfig rm bool //rm sigProxy bool //sig-proxy stopSignal string // stop-signal stopTimeout int64 // stop-timeout storageOpts []string //storage-opt sysctl map[string]string //sysctl tmpfs []string // tmpfs tty bool //tty user uint32 //user group uint32 // group volumes []string //volume volumesFrom []string //volumes-from workDir string //workdir mountLabel string //SecurityOpts processLabel string //SecurityOpts noNewPrivileges bool //SecurityOpts apparmorProfile string //SecurityOpts seccompProfilePath string //SecurityOpts } 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 kpod 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, } 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 } runtime, err := getRuntime(c) if err != nil { return errors.Wrapf(err, "error creating libpod runtime") } createConfig, err := parseCreateOpts(c, runtime) if err != nil { return err } // Deal with the image after all the args have been checked createImage := runtime.NewImage(createConfig.image) if !createImage.HasImageLocal() { // The image wasnt found by the user input'd name or its fqname // Pull the image fmt.Printf("Trying to pull %s...", createImage.PullName) createImage.Pull() } runtimeSpec, err := createConfigToOCISpec(createConfig) if err != nil { return err } defer runtime.Shutdown(false) imageName, err := createImage.GetFQName() if err != nil { return err } imageID, err := createImage.GetImageID() 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(imageID, imageName, false)) options = append(options, libpod.WithSELinuxMountLabel(createConfig.mountLabel)) ctr, err := runtime.NewContainer(runtimeSpec, options...) if err != nil { return err } if c.String("cidfile") != "" { libpod.WriteFile(ctr.ID(), c.String("cidfile")) } else { fmt.Printf("%s\n", ctr.ID()) } return nil } const seccompDefaultPath = "/etc/crio/seccomp.json" func parseSecurityOpt(config *createConfig, securityOpts []string) error { var ( labelOpts []string err error ) for _, opt := range securityOpts { if opt == "no-new-privileges" { config.noNewPrivileges = 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(seccompDefaultPath); err != nil { if !os.IsNotExist(err) { return errors.Wrapf(err, "can't check if %q exists", seccompDefaultPath) } } else { config.seccompProfilePath = seccompDefaultPath } } config.processLabel, config.mountLabel, err = label.InitLabels(labelOpts) return err } // Parses CLI options related to container creation into a config which can be // parsed into an OCI runtime spec func parseCreateOpts(c *cli.Context, runtime *libpod.Runtime) (*createConfig, error) { var command []string var memoryLimit, memoryReservation, memorySwap, memoryKernel int64 var blkioWeight uint16 var uid, gid uint32 if len(c.Args()) < 1 { return nil, errors.Errorf("image name or ID is required") } image := c.Args()[0] if len(c.Args()) > 1 { command = c.Args()[1:] } // LABEL VARIABLES labels, err := getAllLabels(c.StringSlice("label-file"), c.StringSlice("labels")) if err != nil { return &createConfig{}, errors.Wrapf(err, "unable to process labels") } // ENVIRONMENT VARIABLES env, err := getAllEnvironmentVariables(c.StringSlice("env-file"), c.StringSlice("env")) if err != nil { return &createConfig{}, errors.Wrapf(err, "unable to process environment variables") } sysctl, err := convertStringSliceToMap(c.StringSlice("sysctl"), "=") if err != nil { return &createConfig{}, errors.Wrapf(err, "sysctl values must be in the form of KEY=VALUE") } groupAdd, err := stringSlicetoUint32Slice(c.StringSlice("group-add")) if err != nil { return &createConfig{}, errors.Wrapf(err, "invalid value for groups provided") } if c.String("user") != "" { // TODO // We need to mount the imagefs and get the uid/gid // For now, user zeros uid = 0 gid = 0 } 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) } config := &createConfig{ capAdd: c.StringSlice("cap-add"), capDrop: c.StringSlice("cap-drop"), cgroupParent: c.String("cgroup-parent"), command: command, detach: c.Bool("detach"), dnsOpt: c.StringSlice("dns-opt"), dnsSearch: c.StringSlice("dns-search"), dnsServers: c.StringSlice("dns"), entrypoint: c.String("entrypoint"), env: env, expose: c.StringSlice("env"), groupAdd: groupAdd, hostname: c.String("hostname"), image: image, 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"), nsIPC: c.String("ipc"), nsNet: c.String("net"), nsPID: c.String("pid"), pod: c.String("pod"), privileged: c.Bool("privileged"), publish: c.StringSlice("publish"), publishAll: c.Bool("publish-all"), readOnlyRootfs: c.Bool("read-only"), resources: createResourceConfig{ blkioWeight: blkioWeight, blkioDevice: c.StringSlice("blkio-weight-device"), cpuShares: c.Uint64("cpu-shares"), cpuPeriod: c.Uint64("cpu-period"), cpusetCpus: c.String("cpu-period"), cpusetMems: c.String("cpuset-mems"), cpuQuota: c.Int64("cpu-quota"), cpuRtPeriod: c.Uint64("cpu-rt-period"), cpuRtRuntime: c.Int64("cpu-rt-runtime"), cpus: c.String("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: c.String("shm-size"), memory: memoryLimit, memoryReservation: memoryReservation, memorySwap: memorySwap, memorySwapiness: c.Uint64("memory-swapiness"), kernelMemory: memoryKernel, oomScoreAdj: c.Int("oom-score-adj"), pidsLimit: c.Int64("pids-limit"), ulimit: c.StringSlice("ulimit"), }, rm: c.Bool("rm"), sigProxy: c.Bool("sig-proxy"), stopSignal: c.String("stop-signal"), stopTimeout: c.Int64("stop-timeout"), storageOpts: c.StringSlice("storage-opt"), sysctl: sysctl, tmpfs: c.StringSlice("tmpfs"), tty: c.Bool("tty"), user: uid, group: gid, volumes: c.StringSlice("volume"), volumesFrom: c.StringSlice("volumes-from"), workDir: c.String("workdir"), } if !config.privileged { if err := parseSecurityOpt(config, c.StringSlice("security-opt")); err != nil { return nil, err } } return config, nil }