package generate import ( "context" "os" "strings" "github.com/containers/common/libimage" "github.com/containers/podman/v3/libpod" ann "github.com/containers/podman/v3/pkg/annotations" envLib "github.com/containers/podman/v3/pkg/env" "github.com/containers/podman/v3/pkg/signal" "github.com/containers/podman/v3/pkg/specgen" spec "github.com/opencontainers/runtime-spec/specs-go" "github.com/pkg/errors" "golang.org/x/sys/unix" ) // 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 var newImage *libimage.Image var inspectData *libimage.ImageData var err error if s.Image != "" { lookupOptions := &libimage.LookupImageOptions{IgnorePlatform: true} newImage, _, err = r.LibimageRuntime().LookupImage(s.Image, lookupOptions) if err != nil { return nil, err } inspectData, err = newImage.Inspect(ctx, false) 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 } // 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.GetConfig() 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") } if defaultEnvs["container"] == "" { defaultEnvs["container"] = "podman" } 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(defaultEnvs, envs) } // 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 []string{ "http_proxy", "HTTP_PROXY", "https_proxy", "HTTPS_PROXY", "ftp_proxy", "FTP_PROXY", "no_proxy", "NO_PROXY", } { 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 { 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 } 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 } if err := finishThrottleDevices(s); err != nil { return nil, err } // 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 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 } 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)))) v.Minor = (int64(unix.Minor(uint64(statT.Rdev)))) 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)))) v.Minor = (int64(unix.Minor(uint64(statT.Rdev)))) 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)))) v.Minor = (int64(unix.Minor(uint64(statT.Rdev)))) 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)))) v.Minor = (int64(unix.Minor(uint64(statT.Rdev)))) s.ResourceLimits.BlockIO.ThrottleWriteIOPSDevice = append(s.ResourceLimits.BlockIO.ThrottleWriteIOPSDevice, v) } } return nil }