package createconfig import ( "os" "strconv" "strings" "syscall" "github.com/containers/storage" "github.com/cri-o/ocicni/pkg/ocicni" "github.com/docker/docker/api/types/container" "github.com/docker/go-connections/nat" "github.com/opencontainers/runc/libcontainer/devices" 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" "github.com/sirupsen/logrus" "golang.org/x/sys/unix" ) type mountType string // Type constants const ( bps = iota iops // 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" ) // CreateResourceConfig represents resource elements in CreateConfig // structures type CreateResourceConfig struct { BlkioWeight uint16 // blkio-weight BlkioWeightDevice []string // blkio-weight-device CPUPeriod uint64 // cpu-period CPUQuota int64 // cpu-quota CPURtPeriod uint64 // cpu-rt-period CPURtRuntime int64 // cpu-rt-runtime CPUShares uint64 // cpu-shares CPUs float64 // 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 MemorySwappiness int // memory-swappiness OomScoreAdj int //oom-score-adj PidsLimit int64 // pids-limit ShmSize int64 Ulimit []string //ulimit } // CreateConfig is a pre OCI spec structure. It represents user input from varlink or the CLI type CreateConfig struct { Runtime *libpod.Runtime Annotations map[string]string Args []string CapAdd []string // cap-add CapDrop []string // cap-drop CidFile string ConmonPidFile string CgroupParent string // cgroup-parent Command []string Detach bool // detach Devices []string // device DNSOpt []string //dns-opt DNSSearch []string //dns-search DNSServers []string //dns Entrypoint []string //entrypoint Env map[string]string //env ExposedPorts map[nat.Port]struct{} GroupAdd []string // group-add HostAdd []string //add-host Hostname string //hostname Image string ImageID string BuiltinImgVolumes map[string]struct{} // volumes defined in the image config IDMappings *storage.IDMappingOptions ImageVolumeType string // how to handle the image volume, either bind, tmpfs, or ignore Interactive bool //interactive IpcMode container.IpcMode //ipc 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 NetMode container.NetworkMode //net Network string //network NetworkAlias []string //network-alias PidMode container.PidMode //pid Pod string //pod PortBindings nat.PortMap Privileged bool //privileged Publish []string //publish PublishAll bool //publish-all Quiet bool //quiet ReadOnlyRootfs bool //read-only Resources CreateResourceConfig Rm bool //rm ShmDir string StopSignal syscall.Signal // stop-signal StopTimeout uint // stop-timeout Sysctl map[string]string //sysctl Tmpfs []string // tmpfs Tty bool //tty UsernsMode container.UsernsMode //userns User string //user UtsMode container.UTSMode //uts Volumes []string //volume WorkDir string //workdir MountLabel string //SecurityOpts ProcessLabel string //SecurityOpts NoNewPrivs bool //SecurityOpts ApparmorProfile string //SecurityOpts SeccompProfilePath string //SecurityOpts SecurityOpts []string } func u32Ptr(i int64) *uint32 { u := uint32(i); return &u } func fmPtr(i int64) *os.FileMode { fm := os.FileMode(i); return &fm } // CreateBlockIO returns a LinuxBlockIO struct from a CreateConfig 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, err := getStatFromPath(wd.path) if err != nil { return bio, errors.Wrapf(err, "error getting stat from path %q", 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) } bio.WeightDevice = lwds } if len(c.Resources.DeviceReadBps) > 0 { readBps, err := makeThrottleArray(c.Resources.DeviceReadBps, bps) if err != nil { return bio, err } bio.ThrottleReadBpsDevice = readBps } if len(c.Resources.DeviceWriteBps) > 0 { writeBpds, err := makeThrottleArray(c.Resources.DeviceWriteBps, bps) if err != nil { return bio, err } bio.ThrottleWriteBpsDevice = writeBpds } if len(c.Resources.DeviceReadIOps) > 0 { readIOps, err := makeThrottleArray(c.Resources.DeviceReadIOps, iops) if err != nil { return bio, err } bio.ThrottleReadIOPSDevice = readIOps } if len(c.Resources.DeviceWriteIOps) > 0 { writeIOps, err := makeThrottleArray(c.Resources.DeviceWriteIOps, iops) if err != nil { return bio, err } bio.ThrottleWriteIOPSDevice = writeIOps } return bio, nil } func makeThrottleArray(throttleInput []string, rateType int) ([]spec.LinuxThrottleDevice, error) { var ( ltds []spec.LinuxThrottleDevice t *throttleDevice err error ) for _, i := range throttleInput { if rateType == bps { t, err = validateBpsDevice(i) } else { t, err = validateIOpsDevice(i) } if err != nil { return []spec.LinuxThrottleDevice{}, err } ltdStat, err := getStatFromPath(t.path) if err != nil { return ltds, errors.Wrapf(err, "error getting stat from path %q", t.path) } ltd := spec.LinuxThrottleDevice{ Rate: t.rate, } ltd.Major = int64(unix.Major(ltdStat.Rdev)) ltd.Minor = int64(unix.Minor(ltdStat.Rdev)) ltds = append(ltds, ltd) } return ltds, nil } //GetVolumeMounts takes user provided input for bind mounts and creates Mount structs func (c *CreateConfig) GetVolumeMounts(specMounts []spec.Mount) ([]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], ",") } if libpod.MountExists(specMounts, spliti[1]) { continue } 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, "private") } m = append(m, spec.Mount{ Destination: spliti[1], Type: string(TypeBind), Source: spliti[0], Options: options, }) } // volumes from image config if c.ImageVolumeType != "tmpfs" { return m, nil } for vol := range c.BuiltinImgVolumes { if libpod.MountExists(specMounts, vol) { continue } mount := spec.Mount{ Destination: vol, Type: string(TypeTmpfs), Source: string(TypeTmpfs), Options: []string{"rw", "noexec", "nosuid", "nodev", "tmpcopyup"}, } m = append(m, mount) } 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 } // GetContainerCreateOptions takes a CreateConfig and returns a slice of CtrCreateOptions func (c *CreateConfig) GetContainerCreateOptions() ([]libpod.CtrCreateOption, error) { var options []libpod.CtrCreateOption var portBindings []ocicni.PortMapping var err error // 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)) } if len(c.PortBindings) > 0 { portBindings, err = c.CreatePortBindings() if err != nil { return nil, errors.Wrapf(err, "unable to create port bindings") } } if len(c.Volumes) != 0 { // Volumes consist of multiple, comma-delineated fields // The image spec only includes one part of that, so drop the // others, if they are included volumes := make([]string, 0, len(c.Volumes)) for _, vol := range c.Volumes { volumes = append(volumes, strings.SplitN(vol, ":", 2)[0]) } options = append(options, libpod.WithUserVolumes(volumes)) } if len(c.Command) != 0 { options = append(options, libpod.WithCommand(c.Command)) } // Add entrypoint unconditionally // If it's empty it's because it was explicitly set to "" or the image // does not have one options = append(options, libpod.WithEntrypoint(c.Entrypoint)) if c.NetMode.IsContainer() { connectedCtr, err := c.Runtime.LookupContainer(c.NetMode.ConnectedContainer()) if err != nil { return nil, errors.Wrapf(err, "container %q not found", c.NetMode.ConnectedContainer()) } options = append(options, libpod.WithNetNSFrom(connectedCtr)) } else if !c.NetMode.IsHost() && !c.NetMode.IsNone() { postConfigureNetNS := (len(c.IDMappings.UIDMap) > 0 || len(c.IDMappings.GIDMap) > 0) && !c.UsernsMode.IsHost() options = append(options, libpod.WithNetNS([]ocicni.PortMapping{}, postConfigureNetNS)) options = append(options, libpod.WithNetNS(portBindings, postConfigureNetNS)) } if c.PidMode.IsContainer() { connectedCtr, err := c.Runtime.LookupContainer(c.PidMode.Container()) if err != nil { return nil, errors.Wrapf(err, "container %q not found", c.PidMode.Container()) } options = append(options, libpod.WithPIDNSFrom(connectedCtr)) } if c.IpcMode.IsContainer() { connectedCtr, err := c.Runtime.LookupContainer(c.IpcMode.Container()) if err != nil { return nil, errors.Wrapf(err, "container %q not found", c.IpcMode.Container()) } options = append(options, libpod.WithIPCNSFrom(connectedCtr)) } options = append(options, libpod.WithStopSignal(c.StopSignal)) options = append(options, libpod.WithStopTimeout(c.StopTimeout)) if len(c.DNSSearch) > 0 { options = append(options, libpod.WithDNSSearch(c.DNSSearch)) } if len(c.DNSServers) > 0 { options = append(options, libpod.WithDNS(c.DNSServers)) } if len(c.DNSOpt) > 0 { options = append(options, libpod.WithDNSOption(c.DNSOpt)) } if len(c.HostAdd) > 0 { options = append(options, libpod.WithHosts(c.HostAdd)) } logPath := getLoggingPath(c.LogDriverOpt) if logPath != "" { options = append(options, libpod.WithLogPath(logPath)) } options = append(options, libpod.WithPrivileged(c.Privileged)) return options, nil } // CreatePortBindings iterates ports mappings and exposed ports into a format CNI understands func (c *CreateConfig) CreatePortBindings() ([]ocicni.PortMapping, error) { var portBindings []ocicni.PortMapping for containerPb, hostPb := range c.PortBindings { var pm ocicni.PortMapping pm.ContainerPort = int32(containerPb.Int()) for _, i := range hostPb { var hostPort int var err error pm.HostIP = i.HostIP if i.HostPort == "" { hostPort = containerPb.Int() } else { hostPort, err = strconv.Atoi(i.HostPort) if err != nil { return nil, errors.Wrapf(err, "unable to convert host port to integer") } } pm.HostPort = int32(hostPort) // CNI requires us to make both udp and tcp structs pm.Protocol = "udp" portBindings = append(portBindings, pm) pm.Protocol = "tcp" portBindings = append(portBindings, pm) } } return portBindings, nil } // AddPrivilegedDevices iterates through host devices and adds all // host devices to the spec func (c *CreateConfig) AddPrivilegedDevices(g *generate.Generator) error { hostDevices, err := devices.HostDevices() if err != nil { return err } g.ClearLinuxDevices() for _, d := range hostDevices { g.AddDevice(Device(d)) } g.AddLinuxResourcesDevice(true, "", nil, nil, "rwm") return nil } func getStatFromPath(path string) (unix.Stat_t, error) { s := unix.Stat_t{} err := unix.Stat(path, &s) return s, err }