package common import ( "fmt" "os" "strconv" "strings" "time" "github.com/containers/image/v5/manifest" "github.com/containers/podman/v2/cmd/podman/parse" "github.com/containers/podman/v2/libpod/define" ann "github.com/containers/podman/v2/pkg/annotations" envLib "github.com/containers/podman/v2/pkg/env" ns "github.com/containers/podman/v2/pkg/namespaces" "github.com/containers/podman/v2/pkg/specgen" systemdGen "github.com/containers/podman/v2/pkg/systemd/generate" "github.com/containers/podman/v2/pkg/util" "github.com/docker/go-units" "github.com/opencontainers/runtime-spec/specs-go" "github.com/pkg/errors" ) func getCPULimits(c *ContainerCLIOpts) *specs.LinuxCPU { cpu := &specs.LinuxCPU{} hasLimits := false const cpuPeriod = 100000 if c.CPUS > 0 { quota := int64(c.CPUS * cpuPeriod) period := uint64(cpuPeriod) cpu.Period = &period cpu.Quota = "a hasLimits = true } if c.CPUShares > 0 { cpu.Shares = &c.CPUShares hasLimits = true } if c.CPUPeriod > 0 { cpu.Period = &c.CPUPeriod hasLimits = true } if c.CPUSetCPUs != "" { cpu.Cpus = c.CPUSetCPUs hasLimits = true } if c.CPUSetMems != "" { cpu.Mems = c.CPUSetMems hasLimits = true } if c.CPUQuota > 0 { cpu.Quota = &c.CPUQuota hasLimits = true } if c.CPURTPeriod > 0 { cpu.RealtimePeriod = &c.CPURTPeriod hasLimits = true } if c.CPURTRuntime > 0 { cpu.RealtimeRuntime = &c.CPURTRuntime hasLimits = true } if !hasLimits { return nil } return cpu } func getIOLimits(s *specgen.SpecGenerator, c *ContainerCLIOpts) (*specs.LinuxBlockIO, error) { var err error io := &specs.LinuxBlockIO{} hasLimits := false if b := c.BlkIOWeight; len(b) > 0 { u, err := strconv.ParseUint(b, 10, 16) if err != nil { return nil, errors.Wrapf(err, "invalid value for blkio-weight") } nu := uint16(u) io.Weight = &nu hasLimits = true } if len(c.BlkIOWeightDevice) > 0 { if err := parseWeightDevices(s, c.BlkIOWeightDevice); err != nil { return nil, err } hasLimits = true } if bps := c.DeviceReadBPs; len(bps) > 0 { if s.ThrottleReadBpsDevice, err = parseThrottleBPSDevices(bps); err != nil { return nil, err } hasLimits = true } if bps := c.DeviceWriteBPs; len(bps) > 0 { if s.ThrottleWriteBpsDevice, err = parseThrottleBPSDevices(bps); err != nil { return nil, err } hasLimits = true } if iops := c.DeviceReadIOPs; len(iops) > 0 { if s.ThrottleReadIOPSDevice, err = parseThrottleIOPsDevices(iops); err != nil { return nil, err } hasLimits = true } if iops := c.DeviceWriteIOPs; len(iops) > 0 { if s.ThrottleWriteIOPSDevice, err = parseThrottleIOPsDevices(iops); err != nil { return nil, err } hasLimits = true } if !hasLimits { return nil, nil } return io, nil } func getMemoryLimits(s *specgen.SpecGenerator, c *ContainerCLIOpts) (*specs.LinuxMemory, error) { var err error memory := &specs.LinuxMemory{} hasLimits := false if m := c.Memory; len(m) > 0 { ml, err := units.RAMInBytes(m) if err != nil { return nil, errors.Wrapf(err, "invalid value for memory") } memory.Limit = &ml if c.MemorySwap == "" { limit := 2 * ml memory.Swap = &(limit) } hasLimits = true } if m := c.MemoryReservation; len(m) > 0 { mr, err := units.RAMInBytes(m) if err != nil { return nil, errors.Wrapf(err, "invalid value for memory") } memory.Reservation = &mr hasLimits = true } if m := c.MemorySwap; len(m) > 0 { var ms int64 if m == "-1" { ms = int64(-1) s.ResourceLimits.Memory.Swap = &ms } else { ms, err = units.RAMInBytes(m) if err != nil { return nil, errors.Wrapf(err, "invalid value for memory") } } memory.Swap = &ms hasLimits = true } if m := c.KernelMemory; len(m) > 0 { mk, err := units.RAMInBytes(m) if err != nil { return nil, errors.Wrapf(err, "invalid value for kernel-memory") } memory.Kernel = &mk hasLimits = true } if c.MemorySwappiness >= 0 { swappiness := uint64(c.MemorySwappiness) memory.Swappiness = &swappiness hasLimits = true } if c.OOMKillDisable { memory.DisableOOMKiller = &c.OOMKillDisable hasLimits = true } if !hasLimits { return nil, nil } return memory, nil } func FillOutSpecGen(s *specgen.SpecGenerator, c *ContainerCLIOpts, args []string) error { var ( err error ) // validate flags as needed if err := c.validate(); err != nil { return nil } s.User = c.User inputCommand := args[1:] if len(c.HealthCmd) > 0 { if c.NoHealthCheck { return errors.New("Cannot specify both --no-healthcheck and --health-cmd") } s.HealthConfig, err = makeHealthCheckFromCli(c.HealthCmd, c.HealthInterval, c.HealthRetries, c.HealthTimeout, c.HealthStartPeriod) if err != nil { return err } } else if c.NoHealthCheck { s.HealthConfig = &manifest.Schema2HealthConfig{ Test: []string{"NONE"}, } } userNS := ns.UsernsMode(c.UserNS) s.IDMappings, err = util.ParseIDMapping(userNS, c.UIDMap, c.GIDMap, c.SubUIDName, c.SubGIDName) if err != nil { return err } // If some mappings are specified, assume a private user namespace if userNS.IsDefaultValue() && (!s.IDMappings.HostUIDMapping || !s.IDMappings.HostGIDMapping) { s.UserNS.NSMode = specgen.Private } else { s.UserNS.NSMode = specgen.NamespaceMode(userNS) } s.Terminal = c.TTY if err := verifyExpose(c.Expose); err != nil { return err } // We are not handling the Expose flag yet. // s.PortsExpose = c.Expose s.PortMappings = c.Net.PublishPorts s.PublishExposedPorts = c.PublishAll s.Pod = c.Pod if len(c.PodIDFile) > 0 { if len(s.Pod) > 0 { return errors.New("Cannot specify both --pod and --pod-id-file") } podID, err := ReadPodIDFile(c.PodIDFile) if err != nil { return err } s.Pod = podID } expose, err := createExpose(c.Expose) if err != nil { return err } s.Expose = expose for k, v := range map[string]*specgen.Namespace{ c.IPC: &s.IpcNS, c.PID: &s.PidNS, c.UTS: &s.UtsNS, c.CGroupsNS: &s.CgroupNS, } { if k != "" { *v, err = specgen.ParseNamespace(k) if err != nil { return err } } } // userns must be treated differently if c.UserNS != "" { s.UserNS, err = specgen.ParseUserNamespace(c.UserNS) if err != nil { return err } } if c.Net != nil { s.NetNS = c.Net.Network } if sig := c.StopSignal; len(sig) > 0 { stopSignal, err := util.ParseSignal(sig) if err != nil { return err } s.StopSignal = &stopSignal } // ENVIRONMENT VARIABLES // // Precedence order (higher index wins): // 1) env-host, 2) image data, 3) env-file, 4) env env := map[string]string{ "container": "podman", } // 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 errors.Wrap(err, "error parsing host environment variables") } if c.EnvHost { env = envLib.Join(env, osEnv) } else if c.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 { env[envSpec] = v } } } // env-file overrides any previous variables for _, f := range c.EnvFile { fileEnv, err := envLib.ParseFile(f) if err != nil { return err } // File env is overridden by env. env = envLib.Join(env, fileEnv) } parsedEnv, err := envLib.ParseSlice(c.Env) if err != nil { return err } s.Env = envLib.Join(env, parsedEnv) // LABEL VARIABLES labels, err := parse.GetAllLabels(c.LabelFile, c.Label) if err != nil { return errors.Wrapf(err, "unable to process labels") } if systemdUnit, exists := osEnv[systemdGen.EnvVariable]; exists { labels[systemdGen.EnvVariable] = systemdUnit } s.Labels = labels // ANNOTATIONS annotations := make(map[string]string) // First, add our default annotations annotations[ann.TTY] = "false" if c.TTY { annotations[ann.TTY] = "true" } // Last, add user annotations for _, annotation := range c.Annotation { splitAnnotation := strings.SplitN(annotation, "=", 2) if len(splitAnnotation) < 2 { return errors.Errorf("Annotations must be formatted KEY=VALUE") } annotations[splitAnnotation[0]] = splitAnnotation[1] } s.Annotations = annotations s.WorkDir = c.Workdir userCommand := []string{} var command []string if c.Entrypoint != nil { entrypoint := []string{} if ep := *c.Entrypoint; len(ep) > 0 { // Check if entrypoint specified is json if err := json.Unmarshal([]byte(*c.Entrypoint), &entrypoint); err != nil { entrypoint = append(entrypoint, ep) } } s.Entrypoint = entrypoint // Build the command // If we have an entry point, it goes first command = entrypoint } // Include the command used to create the container. s.ContainerCreateCommand = os.Args if len(inputCommand) > 0 { // User command overrides data CMD command = append(command, inputCommand...) userCommand = append(userCommand, inputCommand...) } switch { case len(inputCommand) > 0: s.Command = userCommand case c.Entrypoint != nil: s.Command = []string{} default: s.Command = command } // SHM Size if c.ShmSize != "" { shmSize, err := units.FromHumanSize(c.ShmSize) if err != nil { return errors.Wrapf(err, "unable to translate --shm-size") } s.ShmSize = &shmSize } s.CNINetworks = c.Net.CNINetworks s.HostAdd = c.Net.AddHosts s.UseImageResolvConf = c.Net.UseImageResolvConf s.DNSServers = c.Net.DNSServers s.DNSSearch = c.Net.DNSSearch s.DNSOptions = c.Net.DNSOptions s.StaticIP = c.Net.StaticIP s.StaticMAC = c.Net.StaticMAC s.NetworkOptions = c.Net.NetworkOptions s.UseImageHosts = c.Net.NoHosts s.ImageVolumeMode = c.ImageVolume if s.ImageVolumeMode == "bind" { s.ImageVolumeMode = "anonymous" } s.Systemd = c.Systemd s.SdNotifyMode = c.SdNotifyMode if s.ResourceLimits == nil { s.ResourceLimits = &specs.LinuxResources{} } s.ResourceLimits.Memory, err = getMemoryLimits(s, c) if err != nil { return err } s.ResourceLimits.BlockIO, err = getIOLimits(s, c) if err != nil { return err } if c.PIDsLimit != nil { pids := specs.LinuxPids{ Limit: *c.PIDsLimit, } s.ResourceLimits.Pids = &pids } s.ResourceLimits.CPU = getCPULimits(c) if s.ResourceLimits.CPU == nil && s.ResourceLimits.Pids == nil && s.ResourceLimits.BlockIO == nil && s.ResourceLimits.Memory == nil { s.ResourceLimits = nil } if s.LogConfiguration == nil { s.LogConfiguration = &specgen.LogConfig{} } s.LogConfiguration.Driver = define.KubernetesLogging if ld := c.LogDriver; len(ld) > 0 { s.LogConfiguration.Driver = ld } s.CgroupParent = c.CGroupParent s.CgroupsMode = c.CGroupsMode s.Groups = c.GroupAdd s.Hostname = c.Hostname sysctl := map[string]string{} if ctl := c.Sysctl; len(ctl) > 0 { sysctl, err = util.ValidateSysctls(ctl) if err != nil { return err } } s.Sysctl = sysctl s.CapAdd = c.CapAdd s.CapDrop = c.CapDrop s.Privileged = c.Privileged s.ReadOnlyFilesystem = c.ReadOnly s.ConmonPidFile = c.ConmonPIDFile // TODO // ouitside of specgen and oci though // defaults to true, check spec/storage // s.readon = c.ReadOnlyTmpFS // TODO convert to map? // check if key=value and convert sysmap := make(map[string]string) for _, ctl := range c.Sysctl { splitCtl := strings.SplitN(ctl, "=", 2) if len(splitCtl) < 2 { return errors.Errorf("invalid sysctl value %q", ctl) } sysmap[splitCtl[0]] = splitCtl[1] } s.Sysctl = sysmap if c.CIDFile != "" { s.Annotations[define.InspectAnnotationCIDFile] = c.CIDFile } for _, opt := range c.SecurityOpt { if opt == "no-new-privileges" { s.ContainerSecurityConfig.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": // TODO selinux opts and label opts are the same thing s.ContainerSecurityConfig.SelinuxOpts = append(s.ContainerSecurityConfig.SelinuxOpts, con[1]) s.Annotations[define.InspectAnnotationLabel] = strings.Join(s.ContainerSecurityConfig.SelinuxOpts, ",label=") case "apparmor": s.ContainerSecurityConfig.ApparmorProfile = con[1] s.Annotations[define.InspectAnnotationApparmor] = con[1] case "seccomp": s.SeccompProfilePath = con[1] s.Annotations[define.InspectAnnotationSeccomp] = con[1] default: return fmt.Errorf("invalid --security-opt 2: %q", opt) } } } s.SeccompPolicy = c.SeccompPolicy s.VolumesFrom = c.VolumesFrom // Only add read-only tmpfs mounts in case that we are read-only and the // read-only tmpfs flag has been set. mounts, volumes, overlayVolumes, err := parseVolumes(c.Volume, c.Mount, c.TmpFS, c.ReadOnlyTmpFS && c.ReadOnly) if err != nil { return err } s.Mounts = mounts s.Volumes = volumes s.OverlayVolumes = overlayVolumes for _, dev := range c.Devices { s.Devices = append(s.Devices, specs.LinuxDevice{Path: dev}) } s.Init = c.Init s.InitPath = c.InitPath s.Stdin = c.Interactive // quiet // DeviceCgroupRules: c.StringSlice("device-cgroup-rule"), // Rlimits/Ulimits for _, u := range c.Ulimit { if u == "host" { s.Rlimits = nil break } ul, err := units.ParseUlimit(u) if err != nil { return errors.Wrapf(err, "ulimit option %q requires name=SOFT:HARD, failed to be parsed", u) } rl := specs.POSIXRlimit{ Type: ul.Name, Hard: uint64(ul.Hard), Soft: uint64(ul.Soft), } s.Rlimits = append(s.Rlimits, rl) } logOpts := make(map[string]string) for _, o := range c.LogOptions { split := strings.SplitN(o, "=", 2) if len(split) < 2 { return errors.Errorf("invalid log option %q", o) } switch { case split[0] == "driver": s.LogConfiguration.Driver = split[1] case split[0] == "path": s.LogConfiguration.Path = split[1] default: logOpts[split[0]] = split[1] } } s.LogConfiguration.Options = logOpts s.Name = c.Name s.PreserveFDs = c.PreserveFDs s.OOMScoreAdj = &c.OOMScoreAdj if c.Restart != "" { splitRestart := strings.Split(c.Restart, ":") switch len(splitRestart) { case 1: // No retries specified case 2: if strings.ToLower(splitRestart[0]) != "on-failure" { return errors.Errorf("restart policy retries can only be specified with on-failure restart policy") } retries, err := strconv.Atoi(splitRestart[1]) if err != nil { return errors.Wrapf(err, "error parsing restart policy retry count") } if retries < 0 { return errors.Errorf("must specify restart policy retry count as a number greater than 0") } var retriesUint = uint(retries) s.RestartRetries = &retriesUint default: return errors.Errorf("invalid restart policy: may specify retries at most once") } s.RestartPolicy = splitRestart[0] } s.Remove = c.Rm s.StopTimeout = &c.StopTimeout s.Timezone = c.Timezone s.Umask = c.Umask return nil } func makeHealthCheckFromCli(inCmd, interval string, retries uint, timeout, startPeriod string) (*manifest.Schema2HealthConfig, error) { // Every healthcheck requires a command if len(inCmd) == 0 { return nil, errors.New("Must define a healthcheck command for all healthchecks") } // first try to parse option value as JSON array of strings... cmd := []string{} if inCmd == "none" { cmd = []string{"NONE"} } else { err := json.Unmarshal([]byte(inCmd), &cmd) if err != nil { // ...otherwise pass it to "/bin/sh -c" inside the container cmd = []string{"CMD-SHELL", inCmd} } } hc := manifest.Schema2HealthConfig{ Test: cmd, } if interval == "disable" { interval = "0" } intervalDuration, err := time.ParseDuration(interval) if err != nil { return nil, errors.Wrapf(err, "invalid healthcheck-interval %s ", interval) } hc.Interval = intervalDuration if retries < 1 { return nil, errors.New("healthcheck-retries must be greater than 0") } hc.Retries = int(retries) timeoutDuration, err := time.ParseDuration(timeout) if err != nil { return nil, errors.Wrapf(err, "invalid healthcheck-timeout %s", timeout) } if timeoutDuration < time.Duration(1) { return nil, errors.New("healthcheck-timeout must be at least 1 second") } hc.Timeout = timeoutDuration startPeriodDuration, err := time.ParseDuration(startPeriod) if err != nil { return nil, errors.Wrapf(err, "invalid healthcheck-start-period %s", startPeriod) } if startPeriodDuration < time.Duration(0) { return nil, errors.New("healthcheck-start-period must be 0 seconds or greater") } hc.StartPeriod = startPeriodDuration return &hc, nil } func parseWeightDevices(s *specgen.SpecGenerator, weightDevs []string) error { for _, val := range weightDevs { split := strings.SplitN(val, ":", 2) if len(split) != 2 { return fmt.Errorf("bad format: %s", val) } if !strings.HasPrefix(split[0], "/dev/") { return fmt.Errorf("bad format for device path: %s", val) } weight, err := strconv.ParseUint(split[1], 10, 0) if err != nil { return fmt.Errorf("invalid weight for device: %s", val) } if weight > 0 && (weight < 10 || weight > 1000) { return fmt.Errorf("invalid weight for device: %s", val) } w := uint16(weight) s.WeightDevice[split[0]] = specs.LinuxWeightDevice{ Weight: &w, LeafWeight: nil, } } return nil } func parseThrottleBPSDevices(bpsDevices []string) (map[string]specs.LinuxThrottleDevice, error) { td := make(map[string]specs.LinuxThrottleDevice) for _, val := range bpsDevices { split := strings.SplitN(val, ":", 2) if len(split) != 2 { return nil, fmt.Errorf("bad format: %s", val) } if !strings.HasPrefix(split[0], "/dev/") { return nil, fmt.Errorf("bad format for device path: %s", val) } rate, err := units.RAMInBytes(split[1]) if err != nil { return nil, fmt.Errorf("invalid rate for device: %s. The correct format is :[]. Number must be a positive integer. Unit is optional and can be kb, mb, or gb", val) } if rate < 0 { return nil, fmt.Errorf("invalid rate for device: %s. The correct format is :[]. Number must be a positive integer. Unit is optional and can be kb, mb, or gb", val) } td[split[0]] = specs.LinuxThrottleDevice{Rate: uint64(rate)} } return td, nil } func parseThrottleIOPsDevices(iopsDevices []string) (map[string]specs.LinuxThrottleDevice, error) { td := make(map[string]specs.LinuxThrottleDevice) for _, val := range iopsDevices { split := strings.SplitN(val, ":", 2) if len(split) != 2 { return nil, fmt.Errorf("bad format: %s", val) } if !strings.HasPrefix(split[0], "/dev/") { return nil, fmt.Errorf("bad format for device path: %s", val) } rate, err := strconv.ParseUint(split[1], 10, 64) if err != nil { return nil, fmt.Errorf("invalid rate for device: %s. The correct format is :. Number must be a positive integer", val) } td[split[0]] = specs.LinuxThrottleDevice{Rate: rate} } return td, nil }