package main import ( "encoding/json" "fmt" "io/ioutil" "strings" "github.com/docker/docker/daemon/caps" "github.com/docker/docker/pkg/mount" "github.com/docker/go-units" spec "github.com/opencontainers/runtime-spec/specs-go" "github.com/opencontainers/runtime-tools/generate" "github.com/opencontainers/selinux/go-selinux/label" "github.com/pkg/errors" "github.com/projectatomic/libpod/libpod" ann "github.com/projectatomic/libpod/pkg/annotations" "github.com/sirupsen/logrus" "golang.org/x/sys/unix" ) func blockAccessToKernelFilesystems(config *createConfig, g *generate.Generator) { if !config.Privileged { for _, mp := range []string{ "/proc/kcore", "/proc/latency_stats", "/proc/timer_list", "/proc/timer_stats", "/proc/sched_debug", "/proc/scsi", "/sys/firmware", } { g.AddLinuxMaskedPaths(mp) } for _, rp := range []string{ "/proc/asound", "/proc/bus", "/proc/fs", "/proc/irq", "/proc/sys", "/proc/sysrq-trigger", } { g.AddLinuxReadonlyPaths(rp) } } } func addPidNS(config *createConfig, g *generate.Generator) error { pidMode := config.PidMode if pidMode.IsHost() { return g.RemoveLinuxNamespace(libpod.PIDNamespace) } if pidMode.IsContainer() { ctr, err := config.Runtime.LookupContainer(pidMode.Container()) if err != nil { return errors.Wrapf(err, "container %q not found", pidMode.Container()) } pid, err := ctr.PID() if err != nil { return errors.Wrapf(err, "Failed to get pid of container %q", pidMode.Container()) } pidNsPath := fmt.Sprintf("/proc/%d/ns/pid", pid) if err := g.AddOrReplaceLinuxNamespace(libpod.PIDNamespace, pidNsPath); err != nil { return err } } return nil } func addNetNS(config *createConfig, g *generate.Generator) error { netMode := config.NetMode if netMode.IsHost() { return g.RemoveLinuxNamespace(libpod.NetNamespace) } if netMode.IsNone() { return libpod.ErrNotImplemented } if netMode.IsBridge() { return libpod.ErrNotImplemented } if netMode.IsContainer() { ctr, err := config.Runtime.LookupContainer(netMode.ConnectedContainer()) if err != nil { return errors.Wrapf(err, "container %q not found", netMode.ConnectedContainer()) } pid, err := ctr.PID() if err != nil { return errors.Wrapf(err, "Failed to get pid of container %q", netMode.ConnectedContainer()) } nsPath := fmt.Sprintf("/proc/%d/ns/net", pid) if err := g.AddOrReplaceLinuxNamespace(libpod.NetNamespace, nsPath); err != nil { return err } } return nil } func addUTSNS(config *createConfig, g *generate.Generator) error { utsMode := config.UtsMode if utsMode.IsHost() { return g.RemoveLinuxNamespace(libpod.UTSNamespace) } return nil } func addIpcNS(config *createConfig, g *generate.Generator) error { ipcMode := config.IpcMode if ipcMode.IsHost() { return g.RemoveLinuxNamespace(libpod.IPCNamespace) } if ipcMode.IsContainer() { ctr, err := config.Runtime.LookupContainer(ipcMode.Container()) if err != nil { return errors.Wrapf(err, "container %q not found", ipcMode.Container()) } pid, err := ctr.PID() if err != nil { return errors.Wrapf(err, "Failed to get pid of container %q", ipcMode.Container()) } nsPath := fmt.Sprintf("/proc/%d/ns/ipc", pid) if err := g.AddOrReplaceLinuxNamespace(libpod.IPCNamespace, nsPath); err != nil { return err } } return nil } func addRlimits(config *createConfig, g *generate.Generator) error { var ( ul *units.Ulimit err error ) for _, u := range config.Resources.Ulimit { if ul, err = units.ParseUlimit(u); err != nil { return errors.Wrapf(err, "ulimit option %q requires name=SOFT:HARD, failed to be parsed", u) } g.AddProcessRlimits("RLIMIT_"+strings.ToUpper(ul.Name), uint64(ul.Soft), uint64(ul.Hard)) } return nil } func setupCapabilities(config *createConfig, configSpec *spec.Spec) error { var err error var caplist []string if config.Privileged { caplist = caps.GetAllCapabilities() } else { caplist, err = caps.TweakCapabilities(configSpec.Process.Capabilities.Bounding, config.CapAdd, config.CapDrop) if err != nil { return err } } configSpec.Process.Capabilities.Bounding = caplist configSpec.Process.Capabilities.Permitted = caplist configSpec.Process.Capabilities.Inheritable = caplist configSpec.Process.Capabilities.Effective = caplist return nil } // Parses information needed to create a container into an OCI runtime spec func createConfigToOCISpec(config *createConfig) (*spec.Spec, error) { g := generate.New() g.AddCgroupsMount("ro") g.SetProcessCwd(config.WorkDir) g.SetProcessArgs(config.Command) g.SetProcessTerminal(config.Tty) // User and Group must go together g.SetProcessUID(config.User) g.SetProcessGID(config.Group) for _, gid := range config.GroupAdd { g.AddProcessAdditionalGid(gid) } for key, val := range config.GetAnnotations() { g.AddAnnotation(key, val) } g.SetRootReadonly(config.ReadOnlyRootfs) g.SetHostname(config.Hostname) if config.Hostname != "" { g.AddProcessEnv("HOSTNAME", config.Hostname) } for _, sysctl := range config.Sysctl { s := strings.SplitN(sysctl, "=", 2) g.AddLinuxSysctl(s[0], s[1]) } // RESOURCES - MEMORY if config.Resources.Memory != 0 { g.SetLinuxResourcesMemoryLimit(config.Resources.Memory) } if config.Resources.MemoryReservation != 0 { g.SetLinuxResourcesMemoryReservation(config.Resources.MemoryReservation) } if config.Resources.MemorySwap != 0 { g.SetLinuxResourcesMemorySwap(config.Resources.MemorySwap) } if config.Resources.KernelMemory != 0 { g.SetLinuxResourcesMemoryKernel(config.Resources.KernelMemory) } if config.Resources.MemorySwappiness != -1 { g.SetLinuxResourcesMemorySwappiness(uint64(config.Resources.MemorySwappiness)) } g.SetLinuxResourcesMemoryDisableOOMKiller(config.Resources.DisableOomKiller) g.SetProcessOOMScoreAdj(config.Resources.OomScoreAdj) // RESOURCES - CPU if config.Resources.CpuShares != 0 { g.SetLinuxResourcesCPUShares(config.Resources.CpuShares) } if config.Resources.CpuQuota != 0 { g.SetLinuxResourcesCPUQuota(config.Resources.CpuQuota) } if config.Resources.CpuPeriod != 0 { g.SetLinuxResourcesCPUPeriod(config.Resources.CpuPeriod) } if config.Resources.CpuRtRuntime != 0 { g.SetLinuxResourcesCPURealtimeRuntime(config.Resources.CpuRtRuntime) } if config.Resources.CpuRtPeriod != 0 { g.SetLinuxResourcesCPURealtimePeriod(config.Resources.CpuRtPeriod) } if config.Resources.Cpus != "" { g.SetLinuxResourcesCPUCpus(config.Resources.Cpus) } if config.Resources.CpusetMems != "" { g.SetLinuxResourcesCPUMems(config.Resources.CpusetMems) } // SECURITY OPTS g.SetProcessNoNewPrivileges(config.NoNewPrivileges) g.SetProcessApparmorProfile(config.ApparmorProfile) g.SetProcessSelinuxLabel(config.ProcessLabel) g.SetLinuxMountLabel(config.MountLabel) blockAccessToKernelFilesystems(config, &g) // RESOURCES - PIDS if config.Resources.PidsLimit != 0 { g.SetLinuxResourcesPidsLimit(config.Resources.PidsLimit) } for _, i := range config.Tmpfs { options := []string{"rw", "noexec", "nosuid", "nodev", "size=65536k"} spliti := strings.SplitN(i, ":", 2) if len(spliti) > 1 { if _, _, err := mount.ParseTmpfsOptions(spliti[1]); err != nil { return nil, err } options = strings.Split(spliti[1], ",") } // Default options if nothing passed g.AddTmpfsMount(spliti[0], options) } for name, val := range config.Env { g.AddProcessEnv(name, val) } if err := addRlimits(config, &g); err != nil { return nil, err } if err := addPidNS(config, &g); err != nil { return nil, err } if err := addNetNS(config, &g); err != nil { return nil, err } if err := addUTSNS(config, &g); err != nil { return nil, err } if err := addIpcNS(config, &g); err != nil { return nil, err } configSpec := g.Spec() if config.SeccompProfilePath != "" && config.SeccompProfilePath != "unconfined" { seccompProfile, err := ioutil.ReadFile(config.SeccompProfilePath) if err != nil { return nil, errors.Wrapf(err, "opening seccomp profile (%s) failed", config.SeccompProfilePath) } var seccompConfig spec.LinuxSeccomp if err := json.Unmarshal(seccompProfile, &seccompConfig); err != nil { return nil, errors.Wrapf(err, "decoding seccomp profile (%s) failed", config.SeccompProfilePath) } configSpec.Linux.Seccomp = &seccompConfig } // BIND MOUNTS mounts, err := config.GetVolumeMounts() if err != nil { return nil, errors.Wrapf(err, "error getting volume mounts") } configSpec.Mounts = append(configSpec.Mounts, mounts...) for _, mount := range configSpec.Mounts { for _, opt := range mount.Options { switch opt { case "private", "rprivate", "slave", "rslave", "shared", "rshared": if err := g.SetLinuxRootPropagation(opt); err != nil { return nil, errors.Wrapf(err, "error setting root propagation for %q", mount.Destination) } } } } // HANDLE CAPABILITIES if err := setupCapabilities(config, configSpec); err != nil { return nil, err } /* Hooks: &configSpec.Hooks{}, //Annotations Resources: &configSpec.LinuxResources{ Devices: config.GetDefaultDevices(), BlockIO: &blkio, //HugepageLimits: Network: &configSpec.LinuxNetwork{ // ClassID *uint32 // Priorites []LinuxInterfacePriority }, }, //CgroupsPath: //Namespaces: []LinuxNamespace //Devices // DefaultAction: // Architectures // Syscalls: }, // RootfsPropagation // MaskedPaths // ReadonlyPaths: // IntelRdt }, } */ return configSpec, nil } func (c *createConfig) CreateBlockIO() (spec.LinuxBlockIO, error) { bio := spec.LinuxBlockIO{} bio.Weight = &c.Resources.BlkioWeight if len(c.Resources.BlkioWeightDevice) > 0 { var lwds []spec.LinuxWeightDevice for _, i := range c.Resources.BlkioWeightDevice { wd, err := validateweightDevice(i) if err != nil { return bio, errors.Wrapf(err, "invalid values for blkio-weight-device") } wdStat := getStatFromPath(wd.path) lwd := spec.LinuxWeightDevice{ Weight: &wd.weight, } lwd.Major = int64(unix.Major(wdStat.Rdev)) lwd.Minor = int64(unix.Minor(wdStat.Rdev)) lwds = append(lwds, lwd) } } if len(c.Resources.DeviceReadBps) > 0 { readBps, err := makeThrottleArray(c.Resources.DeviceReadBps) if err != nil { return bio, err } bio.ThrottleReadBpsDevice = readBps } if len(c.Resources.DeviceWriteBps) > 0 { writeBpds, err := makeThrottleArray(c.Resources.DeviceWriteBps) if err != nil { return bio, err } bio.ThrottleWriteBpsDevice = writeBpds } if len(c.Resources.DeviceReadIOps) > 0 { readIOps, err := makeThrottleArray(c.Resources.DeviceReadIOps) if err != nil { return bio, err } bio.ThrottleReadIOPSDevice = readIOps } if len(c.Resources.DeviceWriteIOps) > 0 { writeIOps, err := makeThrottleArray(c.Resources.DeviceWriteIOps) if err != nil { return bio, err } bio.ThrottleWriteIOPSDevice = writeIOps } return bio, nil } // GetAnnotations returns the all the annotations for the container func (c *createConfig) GetAnnotations() map[string]string { a := getDefaultAnnotations() // TODO - Which annotations do we want added by default // TODO - This should be added to the DB long term if c.Tty { a["io.kubernetes.cri-o.TTY"] = "true" } return a } func getDefaultAnnotations() map[string]string { var annotations map[string]string annotations = make(map[string]string) annotations[ann.Annotations] = "" annotations[ann.ContainerID] = "" annotations[ann.ContainerName] = "" annotations[ann.ContainerType] = "" annotations[ann.Created] = "" annotations[ann.HostName] = "" annotations[ann.IP] = "" annotations[ann.Image] = "" annotations[ann.ImageName] = "" annotations[ann.ImageRef] = "" annotations[ann.KubeName] = "" annotations[ann.Labels] = "" annotations[ann.LogPath] = "" annotations[ann.Metadata] = "" annotations[ann.Name] = "" annotations[ann.PrivilegedRuntime] = "" annotations[ann.ResolvPath] = "" annotations[ann.HostnamePath] = "" annotations[ann.SandboxID] = "" annotations[ann.SandboxName] = "" annotations[ann.ShmPath] = "" annotations[ann.MountPoint] = "" annotations[ann.TrustedSandbox] = "" annotations[ann.TTY] = "false" annotations[ann.Stdin] = "" annotations[ann.StdinOnce] = "" annotations[ann.Volumes] = "" return annotations } //GetVolumeMounts takes user provided input for bind mounts and creates Mount structs func (c *createConfig) GetVolumeMounts() ([]spec.Mount, error) { var m []spec.Mount var options []string for _, i := range c.Volumes { // We need to handle SELinux options better here, specifically :Z spliti := strings.Split(i, ":") if len(spliti) > 2 { options = strings.Split(spliti[2], ",") } options = append(options, "rbind") var foundrw, foundro, foundz, foundZ bool var rootProp string for _, opt := range options { switch opt { case "rw": foundrw = true case "ro": foundro = true case "z": foundz = true case "Z": foundZ = true case "private", "rprivate", "slave", "rslave", "shared", "rshared": rootProp = opt } } if !foundrw && !foundro { options = append(options, "rw") } if foundz { if err := label.Relabel(spliti[0], c.MountLabel, true); err != nil { return nil, errors.Wrapf(err, "relabel failed %q", spliti[0]) } } if foundZ { if err := label.Relabel(spliti[0], c.MountLabel, false); err != nil { return nil, errors.Wrapf(err, "relabel failed %q", spliti[0]) } } if rootProp == "" { options = append(options, "rprivate") } m = append(m, spec.Mount{ Destination: spliti[1], Type: string(TypeBind), Source: spliti[0], Options: options, }) } return m, nil } //GetTmpfsMounts takes user provided input for Tmpfs mounts and creates Mount structs func (c *createConfig) GetTmpfsMounts() []spec.Mount { var m []spec.Mount for _, i := range c.Tmpfs { // Default options if nothing passed options := []string{"rw", "noexec", "nosuid", "nodev", "size=65536k"} spliti := strings.Split(i, ":") destPath := spliti[0] if len(spliti) > 1 { options = strings.Split(spliti[1], ",") } m = append(m, spec.Mount{ Destination: destPath, Type: string(TypeTmpfs), Options: options, Source: string(TypeTmpfs), }) } return m } func (c *createConfig) GetContainerCreateOptions() ([]libpod.CtrCreateOption, error) { var options []libpod.CtrCreateOption // Uncomment after talking to mheon about unimplemented funcs // options = append(options, libpod.WithLabels(c.labels)) if c.Interactive { options = append(options, libpod.WithStdin()) } if c.Name != "" { logrus.Debugf("appending name %s", c.Name) options = append(options, libpod.WithName(c.Name)) } return options, nil } func getStatFromPath(path string) unix.Stat_t { s := unix.Stat_t{} _ = unix.Stat(path, &s) return s } func makeThrottleArray(throttleInput []string) ([]spec.LinuxThrottleDevice, error) { var ltds []spec.LinuxThrottleDevice for _, i := range throttleInput { t, err := validateBpsDevice(i) if err != nil { return []spec.LinuxThrottleDevice{}, err } ltd := spec.LinuxThrottleDevice{} ltd.Rate = t.rate ltdStat := getStatFromPath(t.path) ltd.Major = int64(unix.Major(ltdStat.Rdev)) ltd.Minor = int64(unix.Major(ltdStat.Rdev)) ltds = append(ltds, ltd) } return ltds, nil }