package generate import ( "context" "encoding/json" "fmt" "os" "strings" "time" "github.com/containers/common/libimage" "github.com/containers/common/pkg/config" "github.com/containers/podman/v4/libpod" "github.com/containers/podman/v4/libpod/define" ann "github.com/containers/podman/v4/pkg/annotations" envLib "github.com/containers/podman/v4/pkg/env" "github.com/containers/podman/v4/pkg/signal" "github.com/containers/podman/v4/pkg/specgen" spec "github.com/opencontainers/runtime-spec/specs-go" "github.com/pkg/errors" "github.com/sirupsen/logrus" "golang.org/x/sys/unix" ) func getImageFromSpec(ctx context.Context, r *libpod.Runtime, s *specgen.SpecGenerator) (*libimage.Image, string, *libimage.ImageData, error) { if s.Image == "" || s.Rootfs != "" { return nil, "", nil, nil } // Image may already have been set in the generator. image, resolvedName := s.GetImage() if image != nil { inspectData, err := image.Inspect(ctx, nil) if err != nil { return nil, "", nil, err } return image, resolvedName, inspectData, nil } // Need to look up image. image, resolvedName, err := r.LibimageRuntime().LookupImage(s.Image, nil) if err != nil { return nil, "", nil, err } s.SetImage(image, resolvedName) inspectData, err := image.Inspect(ctx, nil) if err != nil { return nil, "", nil, err } return image, resolvedName, inspectData, err } // Fill any missing parts of the spec generator (e.g. from the image). // Returns a set of warnings or any fatal error that occurred. func CompleteSpec(ctx context.Context, r *libpod.Runtime, s *specgen.SpecGenerator) ([]string, error) { // Only add image configuration if we have an image newImage, _, inspectData, err := getImageFromSpec(ctx, r, s) if err != nil { return nil, err } if inspectData != nil { inspectData, err = newImage.Inspect(ctx, nil) if err != nil { return nil, err } if s.HealthConfig == nil { // NOTE: the health check is only set for Docker images // but inspect will take care of it. s.HealthConfig = inspectData.HealthCheck if s.HealthConfig != nil { if s.HealthConfig.Timeout == 0 { hct, err := time.ParseDuration(define.DefaultHealthCheckTimeout) if err != nil { return nil, err } s.HealthConfig.Timeout = hct } if s.HealthConfig.Interval == 0 { hct, err := time.ParseDuration(define.DefaultHealthCheckInterval) if err != nil { return nil, err } s.HealthConfig.Interval = hct } } } // Image stop signal if s.StopSignal == nil { if inspectData.Config.StopSignal != "" { sig, err := signal.ParseSignalNameOrNumber(inspectData.Config.StopSignal) if err != nil { return nil, err } s.StopSignal = &sig } } } rtc, err := r.GetConfigNoCopy() if err != nil { return nil, err } // Get Default Environment from containers.conf defaultEnvs, err := envLib.ParseSlice(rtc.GetDefaultEnvEx(s.EnvHost, s.HTTPProxy)) if err != nil { return nil, errors.Wrap(err, "error parsing fields in containers.conf") } var envs map[string]string // Image Environment defaults if inspectData != nil { // Image envs from the image if they don't exist // already, overriding the default environments envs, err = envLib.ParseSlice(inspectData.Config.Env) if err != nil { return nil, errors.Wrap(err, "Env fields from image failed to parse") } defaultEnvs = envLib.Join(envLib.DefaultEnvVariables(), envLib.Join(defaultEnvs, envs)) } for _, e := range s.UnsetEnv { delete(defaultEnvs, e) } if s.UnsetEnvAll { defaultEnvs = make(map[string]string) } // First transform the os env into a map. We need it for the labels later in // any case. osEnv, err := envLib.ParseSlice(os.Environ()) if err != nil { return nil, errors.Wrap(err, "error parsing host environment variables") } // Caller Specified defaults if s.EnvHost { defaultEnvs = envLib.Join(defaultEnvs, osEnv) } else if s.HTTPProxy { for _, envSpec := range config.ProxyEnv { if v, ok := osEnv[envSpec]; ok { defaultEnvs[envSpec] = v } } } s.Env = envLib.Join(defaultEnvs, s.Env) // Labels and Annotations annotations := make(map[string]string) if newImage != nil { labels, err := newImage.Labels(ctx) if err != nil { return nil, err } // labels from the image that don't exist already if len(labels) > 0 && s.Labels == nil { s.Labels = make(map[string]string) } for k, v := range labels { if _, exists := s.Labels[k]; !exists { s.Labels[k] = v } } // Add annotations from the image for k, v := range inspectData.Annotations { if !define.IsReservedAnnotation(k) { annotations[k] = v } } } // in the event this container is in a pod, and the pod has an infra container // we will want to configure it as a type "container" instead defaulting to // the behavior of a "sandbox" container // In Kata containers: // - "sandbox" is the annotation that denotes the container should use its own // VM, which is the default behavior // - "container" denotes the container should join the VM of the SandboxID // (the infra container) if len(s.Pod) > 0 { annotations[ann.SandboxID] = s.Pod annotations[ann.ContainerType] = ann.ContainerTypeContainer // Check if this is an init-ctr and if so, check if // the pod is running. we do not want to add init-ctrs to // a running pod because it creates confusion for us. if len(s.InitContainerType) > 0 { p, err := r.LookupPod(s.Pod) if err != nil { return nil, err } containerStatuses, err := p.Status() if err != nil { return nil, err } // If any one of the containers is running, the pod is considered to be // running for _, con := range containerStatuses { if con == define.ContainerStateRunning { return nil, errors.New("cannot add init-ctr to a running pod") } } } } for _, v := range rtc.Containers.Annotations { split := strings.SplitN(v, "=", 2) k := split[0] v := "" if len(split) == 2 { v = split[1] } annotations[k] = v } // now pass in the values from client for k, v := range s.Annotations { annotations[k] = v } s.Annotations = annotations if len(s.SeccompProfilePath) < 1 { p, err := libpod.DefaultSeccompPath() if err != nil { return nil, err } s.SeccompProfilePath = p } if len(s.User) == 0 && inspectData != nil { s.User = inspectData.Config.User } // Unless already set via the CLI, check if we need to disable process // labels or set the defaults. if len(s.SelinuxOpts) == 0 { if err := setLabelOpts(s, r, s.PidNS, s.IpcNS); err != nil { return nil, err } } if s.CgroupsMode == "" { s.CgroupsMode = rtc.Cgroups() } // If caller did not specify Pids Limits load default if s.ResourceLimits == nil || s.ResourceLimits.Pids == nil { if s.CgroupsMode != "disabled" { limit := rtc.PidsLimit() if limit != 0 { if s.ResourceLimits == nil { s.ResourceLimits = &spec.LinuxResources{} } s.ResourceLimits.Pids = &spec.LinuxPids{ Limit: limit, } } } } if s.LogConfiguration == nil { s.LogConfiguration = &specgen.LogConfig{} } // set log-driver from common if not already set if len(s.LogConfiguration.Driver) < 1 { s.LogConfiguration.Driver = rtc.Containers.LogDriver } if len(rtc.Containers.LogTag) > 0 { if s.LogConfiguration.Driver != define.JSONLogging { if s.LogConfiguration.Options == nil { s.LogConfiguration.Options = make(map[string]string) } s.LogConfiguration.Options["tag"] = rtc.Containers.LogTag } else { logrus.Warnf("log_tag %q is not allowed with %q log_driver", rtc.Containers.LogTag, define.JSONLogging) } } warnings, err := verifyContainerResources(s) if err != nil { return warnings, err } // Warn on net=host/container/pod/none and port mappings. if (s.NetNS.NSMode == specgen.Host || s.NetNS.NSMode == specgen.FromContainer || s.NetNS.NSMode == specgen.FromPod || s.NetNS.NSMode == specgen.NoNetwork) && len(s.PortMappings) > 0 { warnings = append(warnings, "Port mappings have been discarded as one of the Host, Container, Pod, and None network modes are in use") } return warnings, nil } // FinishThrottleDevices takes the temporary representation of the throttle // devices in the specgen and looks up the major and major minors. it then // sets the throttle devices proper in the specgen func FinishThrottleDevices(s *specgen.SpecGenerator) error { if bps := s.ThrottleReadBpsDevice; len(bps) > 0 { for k, v := range bps { statT := unix.Stat_t{} if err := unix.Stat(k, &statT); err != nil { return err } v.Major = (int64(unix.Major(uint64(statT.Rdev)))) //nolint: unconvert v.Minor = (int64(unix.Minor(uint64(statT.Rdev)))) //nolint: unconvert if s.ResourceLimits.BlockIO == nil { s.ResourceLimits.BlockIO = new(spec.LinuxBlockIO) } s.ResourceLimits.BlockIO.ThrottleReadBpsDevice = append(s.ResourceLimits.BlockIO.ThrottleReadBpsDevice, v) } } if bps := s.ThrottleWriteBpsDevice; len(bps) > 0 { for k, v := range bps { statT := unix.Stat_t{} if err := unix.Stat(k, &statT); err != nil { return err } v.Major = (int64(unix.Major(uint64(statT.Rdev)))) //nolint: unconvert v.Minor = (int64(unix.Minor(uint64(statT.Rdev)))) //nolint: unconvert s.ResourceLimits.BlockIO.ThrottleWriteBpsDevice = append(s.ResourceLimits.BlockIO.ThrottleWriteBpsDevice, v) } } if iops := s.ThrottleReadIOPSDevice; len(iops) > 0 { for k, v := range iops { statT := unix.Stat_t{} if err := unix.Stat(k, &statT); err != nil { return err } v.Major = (int64(unix.Major(uint64(statT.Rdev)))) //nolint: unconvert v.Minor = (int64(unix.Minor(uint64(statT.Rdev)))) //nolint: unconvert s.ResourceLimits.BlockIO.ThrottleReadIOPSDevice = append(s.ResourceLimits.BlockIO.ThrottleReadIOPSDevice, v) } } if iops := s.ThrottleWriteIOPSDevice; len(iops) > 0 { for k, v := range iops { statT := unix.Stat_t{} if err := unix.Stat(k, &statT); err != nil { return err } v.Major = (int64(unix.Major(uint64(statT.Rdev)))) //nolint: unconvert v.Minor = (int64(unix.Minor(uint64(statT.Rdev)))) //nolint: unconvert s.ResourceLimits.BlockIO.ThrottleWriteIOPSDevice = append(s.ResourceLimits.BlockIO.ThrottleWriteIOPSDevice, v) } } return nil } // ConfigToSpec takes a completed container config and converts it back into a specgenerator for purposes of cloning an existing container func ConfigToSpec(rt *libpod.Runtime, specg *specgen.SpecGenerator, contaierID string) (*libpod.Container, *libpod.InfraInherit, error) { c, err := rt.LookupContainer(contaierID) if err != nil { return nil, nil, err } conf := c.ConfigWithNetworks() if conf == nil { return nil, nil, fmt.Errorf("failed to get config for container %s", c.ID()) } tmpSystemd := conf.Systemd tmpMounts := conf.Mounts conf.Systemd = nil conf.Mounts = []string{} if specg == nil { specg = &specgen.SpecGenerator{} } specg.Pod = conf.Pod matching, err := json.Marshal(conf) if err != nil { return nil, nil, err } err = json.Unmarshal(matching, specg) if err != nil { return nil, nil, err } conf.Systemd = tmpSystemd conf.Mounts = tmpMounts if conf.Spec != nil && conf.Spec.Linux != nil && conf.Spec.Linux.Resources != nil { if specg.ResourceLimits == nil { specg.ResourceLimits = conf.Spec.Linux.Resources } } nameSpaces := []string{"pid", "net", "cgroup", "ipc", "uts", "user"} containers := []string{conf.PIDNsCtr, conf.NetNsCtr, conf.CgroupNsCtr, conf.IPCNsCtr, conf.UTSNsCtr, conf.UserNsCtr} place := []*specgen.Namespace{&specg.PidNS, &specg.NetNS, &specg.CgroupNS, &specg.IpcNS, &specg.UtsNS, &specg.UserNS} for i, ns := range containers { if len(ns) > 0 { ns := specgen.Namespace{NSMode: specgen.FromContainer, Value: ns} place[i] = &ns } else { switch nameSpaces[i] { case "pid": specg.PidNS = specgen.Namespace{NSMode: specgen.Default} // default case "net": switch { case conf.NetMode.IsBridge(): toExpose := make(map[uint16]string, len(conf.ExposedPorts)) for _, expose := range []map[uint16][]string{conf.ExposedPorts} { for port, proto := range expose { toExpose[port] = strings.Join(proto, ",") } } specg.Expose = toExpose specg.PortMappings = conf.PortMappings specg.NetNS = specgen.Namespace{NSMode: specgen.Bridge} case conf.NetMode.IsSlirp4netns(): toExpose := make(map[uint16]string, len(conf.ExposedPorts)) for _, expose := range []map[uint16][]string{conf.ExposedPorts} { for port, proto := range expose { toExpose[port] = strings.Join(proto, ",") } } specg.Expose = toExpose specg.PortMappings = conf.PortMappings netMode := strings.Split(string(conf.NetMode), ":") var val string if len(netMode) > 1 { val = netMode[1] } specg.NetNS = specgen.Namespace{NSMode: specgen.Slirp, Value: val} case conf.NetMode.IsPrivate(): specg.NetNS = specgen.Namespace{NSMode: specgen.Private} case conf.NetMode.IsDefault(): specg.NetNS = specgen.Namespace{NSMode: specgen.Default} case conf.NetMode.IsUserDefined(): specg.NetNS = specgen.Namespace{NSMode: specgen.Path, Value: strings.Split(string(conf.NetMode), ":")[1]} case conf.NetMode.IsContainer(): specg.NetNS = specgen.Namespace{NSMode: specgen.FromContainer, Value: strings.Split(string(conf.NetMode), ":")[1]} case conf.NetMode.IsPod(): specg.NetNS = specgen.Namespace{NSMode: specgen.FromPod, Value: strings.Split(string(conf.NetMode), ":")[1]} } case "cgroup": specg.CgroupNS = specgen.Namespace{NSMode: specgen.Default} // default case "ipc": switch conf.ShmDir { case "/dev/shm": specg.IpcNS = specgen.Namespace{NSMode: specgen.Host} case "": specg.IpcNS = specgen.Namespace{NSMode: specgen.None} default: specg.IpcNS = specgen.Namespace{NSMode: specgen.Default} // default } case "uts": specg.UtsNS = specgen.Namespace{NSMode: specgen.Private} // default case "user": if conf.AddCurrentUserPasswdEntry { specg.UserNS = specgen.Namespace{NSMode: specgen.KeepID} } else { specg.UserNS = specgen.Namespace{NSMode: specgen.Default} // default } } } } specg.IDMappings = &conf.IDMappings specg.ContainerCreateCommand = conf.CreateCommand if len(specg.Rootfs) == 0 { specg.Rootfs = conf.Rootfs } if len(specg.Image) == 0 { specg.Image = conf.RootfsImageID } var named []*specgen.NamedVolume if len(conf.NamedVolumes) != 0 { for _, v := range conf.NamedVolumes { named = append(named, &specgen.NamedVolume{ Name: v.Name, Dest: v.Dest, Options: v.Options, }) } } specg.Volumes = named var image []*specgen.ImageVolume if len(conf.ImageVolumes) != 0 { for _, v := range conf.ImageVolumes { image = append(image, &specgen.ImageVolume{ Source: v.Source, Destination: v.Dest, ReadWrite: v.ReadWrite, }) } } specg.ImageVolumes = image var overlay []*specgen.OverlayVolume if len(conf.OverlayVolumes) != 0 { for _, v := range conf.OverlayVolumes { overlay = append(overlay, &specgen.OverlayVolume{ Source: v.Source, Destination: v.Dest, Options: v.Options, }) } } specg.OverlayVolumes = overlay _, mounts := c.SortUserVolumes(c.Spec()) specg.Mounts = mounts specg.HostDeviceList = conf.DeviceHostSrc specg.Networks = conf.Networks specg.ShmSize = &conf.ShmSize mapSecurityConfig(conf, specg) if c.IsInfra() { // if we are creating this spec for a pod's infra ctr, map the compatible options spec, err := json.Marshal(specg) if err != nil { return nil, nil, err } infraInherit := &libpod.InfraInherit{} err = json.Unmarshal(spec, infraInherit) return c, infraInherit, err } // else just return the container return c, nil, nil } // mapSecurityConfig takes a libpod.ContainerSecurityConfig and converts it to a specgen.ContinerSecurityConfig func mapSecurityConfig(c *libpod.ContainerConfig, s *specgen.SpecGenerator) { s.Privileged = c.Privileged s.SelinuxOpts = append(s.SelinuxOpts, c.LabelOpts...) s.User = c.User s.Groups = c.Groups s.HostUsers = c.HostUsers }