package runconfig import ( "fmt" "strconv" "strings" "github.com/docker/docker/nat" "github.com/docker/docker/opts" flag "github.com/docker/docker/pkg/mflag" "github.com/docker/docker/pkg/parsers" "github.com/docker/docker/pkg/ulimit" "github.com/docker/docker/pkg/units" ) var ( ErrConflictContainerNetworkAndLinks = fmt.Errorf("Conflicting options: --net=container can't be used with links. This would result in undefined behavior") ErrConflictNetworkAndDns = fmt.Errorf("Conflicting options: --dns and the network mode (--net)") ErrConflictNetworkHostname = fmt.Errorf("Conflicting options: -h and the network mode (--net)") ErrConflictHostNetworkAndLinks = fmt.Errorf("Conflicting options: --net=host can't be used with links. This would result in undefined behavior") ErrConflictContainerNetworkAndMac = fmt.Errorf("Conflicting options: --mac-address and the network mode (--net)") ErrConflictNetworkHosts = fmt.Errorf("Conflicting options: --add-host and the network mode (--net)") ErrConflictNetworkPublishPorts = fmt.Errorf("Conflicting options: -p, -P, --publish-all, --publish and the network mode (--net)") ErrConflictNetworkExposePorts = fmt.Errorf("Conflicting options: --expose and the network mode (--expose)") ) func Parse(cmd *flag.FlagSet, args []string) (*Config, *HostConfig, *flag.FlagSet, error) { var ( // FIXME: use utils.ListOpts for attach and volumes? flAttach = opts.NewListOpts(opts.ValidateAttach) flVolumes = opts.NewListOpts(opts.ValidatePath) flLinks = opts.NewListOpts(opts.ValidateLink) flEnv = opts.NewListOpts(opts.ValidateEnv) flLabels = opts.NewListOpts(opts.ValidateEnv) flDevices = opts.NewListOpts(opts.ValidatePath) ulimits = make(map[string]*ulimit.Ulimit) flUlimits = opts.NewUlimitOpt(ulimits) flPublish = opts.NewListOpts(nil) flExpose = opts.NewListOpts(nil) flDns = opts.NewListOpts(opts.ValidateIPAddress) flDnsSearch = opts.NewListOpts(opts.ValidateDnsSearch) flExtraHosts = opts.NewListOpts(opts.ValidateExtraHost) flVolumesFrom = opts.NewListOpts(nil) flLxcOpts = opts.NewListOpts(nil) flEnvFile = opts.NewListOpts(nil) flCapAdd = opts.NewListOpts(nil) flCapDrop = opts.NewListOpts(nil) flSecurityOpt = opts.NewListOpts(nil) flLabelsFile = opts.NewListOpts(nil) flLoggingOpts = opts.NewListOpts(nil) flNetwork = cmd.Bool([]string{"#n", "#-networking"}, true, "Enable networking for this container") flPrivileged = cmd.Bool([]string{"#privileged", "-privileged"}, false, "Give extended privileges to this container") flPidMode = cmd.String([]string{"-pid"}, "", "PID namespace to use") flUTSMode = cmd.String([]string{"-uts"}, "", "UTS namespace to use") flPublishAll = cmd.Bool([]string{"P", "-publish-all"}, false, "Publish all exposed ports to random ports") flStdin = cmd.Bool([]string{"i", "-interactive"}, false, "Keep STDIN open even if not attached") flTty = cmd.Bool([]string{"t", "-tty"}, false, "Allocate a pseudo-TTY") flOomKillDisable = cmd.Bool([]string{"-oom-kill-disable"}, false, "Disable OOM Killer") flContainerIDFile = cmd.String([]string{"#cidfile", "-cidfile"}, "", "Write the container ID to the file") flEntrypoint = cmd.String([]string{"#entrypoint", "-entrypoint"}, "", "Overwrite the default ENTRYPOINT of the image") flHostname = cmd.String([]string{"h", "-hostname"}, "", "Container host name") flMemoryString = cmd.String([]string{"m", "-memory"}, "", "Memory limit") flMemorySwap = cmd.String([]string{"-memory-swap"}, "", "Total memory (memory + swap), '-1' to disable swap") flUser = cmd.String([]string{"u", "-user"}, "", "Username or UID (format: [:])") flWorkingDir = cmd.String([]string{"w", "-workdir"}, "", "Working directory inside the container") flCpuShares = cmd.Int64([]string{"c", "-cpu-shares"}, 0, "CPU shares (relative weight)") flCpuPeriod = cmd.Int64([]string{"-cpu-period"}, 0, "Limit CPU CFS (Completely Fair Scheduler) period") flCpusetCpus = cmd.String([]string{"#-cpuset", "-cpuset-cpus"}, "", "CPUs in which to allow execution (0-3, 0,1)") flCpusetMems = cmd.String([]string{"-cpuset-mems"}, "", "MEMs in which to allow execution (0-3, 0,1)") flCpuQuota = cmd.Int64([]string{"-cpu-quota"}, 0, "Limit the CPU CFS quota") flBlkioWeight = cmd.Int64([]string{"-blkio-weight"}, 0, "Block IO (relative weight), between 10 and 1000") flNetMode = cmd.String([]string{"-net"}, "default", "Set the Network mode for the container") flMacAddress = cmd.String([]string{"-mac-address"}, "", "Container MAC address (e.g. 92:d0:c6:0a:29:33)") flIpcMode = cmd.String([]string{"-ipc"}, "", "IPC namespace to use") flRestartPolicy = cmd.String([]string{"-restart"}, "no", "Restart policy to apply when a container exits") flReadonlyRootfs = cmd.Bool([]string{"-read-only"}, false, "Mount the container's root filesystem as read only") flLoggingDriver = cmd.String([]string{"-log-driver"}, "", "Logging driver for container") flCgroupParent = cmd.String([]string{"-cgroup-parent"}, "", "Optional parent cgroup for the container") ) cmd.Var(&flAttach, []string{"a", "-attach"}, "Attach to STDIN, STDOUT or STDERR") cmd.Var(&flVolumes, []string{"v", "-volume"}, "Bind mount a volume") cmd.Var(&flLinks, []string{"#link", "-link"}, "Add link to another container") cmd.Var(&flDevices, []string{"-device"}, "Add a host device to the container") cmd.Var(&flLabels, []string{"l", "-label"}, "Set meta data on a container") cmd.Var(&flLabelsFile, []string{"-label-file"}, "Read in a line delimited file of labels") cmd.Var(&flEnv, []string{"e", "-env"}, "Set environment variables") cmd.Var(&flEnvFile, []string{"-env-file"}, "Read in a file of environment variables") cmd.Var(&flPublish, []string{"p", "-publish"}, "Publish a container's port(s) to the host") cmd.Var(&flExpose, []string{"#expose", "-expose"}, "Expose a port or a range of ports") cmd.Var(&flDns, []string{"#dns", "-dns"}, "Set custom DNS servers") cmd.Var(&flDnsSearch, []string{"-dns-search"}, "Set custom DNS search domains") cmd.Var(&flExtraHosts, []string{"-add-host"}, "Add a custom host-to-IP mapping (host:ip)") cmd.Var(&flVolumesFrom, []string{"#volumes-from", "-volumes-from"}, "Mount volumes from the specified container(s)") cmd.Var(&flLxcOpts, []string{"#lxc-conf", "-lxc-conf"}, "Add custom lxc options") cmd.Var(&flCapAdd, []string{"-cap-add"}, "Add Linux capabilities") cmd.Var(&flCapDrop, []string{"-cap-drop"}, "Drop Linux capabilities") cmd.Var(&flSecurityOpt, []string{"-security-opt"}, "Security Options") cmd.Var(flUlimits, []string{"-ulimit"}, "Ulimit options") cmd.Var(&flLoggingOpts, []string{"-log-opt"}, "Log driver options") expFlags := attachExperimentalFlags(cmd) cmd.Require(flag.Min, 1) if err := cmd.ParseFlags(args, true); err != nil { return nil, nil, cmd, err } var ( attachStdin = flAttach.Get("stdin") attachStdout = flAttach.Get("stdout") attachStderr = flAttach.Get("stderr") ) netMode, err := parseNetMode(*flNetMode) if err != nil { return nil, nil, cmd, fmt.Errorf("--net: invalid net mode: %v", err) } if (netMode.IsHost() || netMode.IsContainer()) && *flHostname != "" { return nil, nil, cmd, ErrConflictNetworkHostname } if netMode.IsHost() && flLinks.Len() > 0 { return nil, nil, cmd, ErrConflictHostNetworkAndLinks } if netMode.IsContainer() && flLinks.Len() > 0 { return nil, nil, cmd, ErrConflictContainerNetworkAndLinks } if (netMode.IsHost() || netMode.IsContainer()) && flDns.Len() > 0 { return nil, nil, cmd, ErrConflictNetworkAndDns } if (netMode.IsContainer() || netMode.IsHost()) && flExtraHosts.Len() > 0 { return nil, nil, cmd, ErrConflictNetworkHosts } if (netMode.IsContainer() || netMode.IsHost()) && *flMacAddress != "" { return nil, nil, cmd, ErrConflictContainerNetworkAndMac } if netMode.IsContainer() && (flPublish.Len() > 0 || *flPublishAll == true) { return nil, nil, cmd, ErrConflictNetworkPublishPorts } if netMode.IsContainer() && flExpose.Len() > 0 { return nil, nil, cmd, ErrConflictNetworkExposePorts } // Validate the input mac address if *flMacAddress != "" { if _, err := opts.ValidateMACAddress(*flMacAddress); err != nil { return nil, nil, cmd, fmt.Errorf("%s is not a valid mac address", *flMacAddress) } } // If neither -d or -a are set, attach to everything by default if flAttach.Len() == 0 { attachStdout = true attachStderr = true if *flStdin { attachStdin = true } } var flMemory int64 if *flMemoryString != "" { parsedMemory, err := units.RAMInBytes(*flMemoryString) if err != nil { return nil, nil, cmd, err } flMemory = parsedMemory } var MemorySwap int64 if *flMemorySwap != "" { if *flMemorySwap == "-1" { MemorySwap = -1 } else { parsedMemorySwap, err := units.RAMInBytes(*flMemorySwap) if err != nil { return nil, nil, cmd, err } MemorySwap = parsedMemorySwap } } var binds []string // add any bind targets to the list of container volumes for bind := range flVolumes.GetMap() { if arr := strings.Split(bind, ":"); len(arr) > 1 { if arr[1] == "/" { return nil, nil, cmd, fmt.Errorf("Invalid bind mount: destination can't be '/'") } // after creating the bind mount we want to delete it from the flVolumes values because // we do not want bind mounts being committed to image configs binds = append(binds, bind) flVolumes.Delete(bind) } else if bind == "/" { return nil, nil, cmd, fmt.Errorf("Invalid volume: path can't be '/'") } } var ( parsedArgs = cmd.Args() runCmd *Command entrypoint *Entrypoint image = cmd.Arg(0) ) if len(parsedArgs) > 1 { runCmd = NewCommand(parsedArgs[1:]...) } if *flEntrypoint != "" { entrypoint = NewEntrypoint(*flEntrypoint) } lc, err := parseKeyValueOpts(flLxcOpts) if err != nil { return nil, nil, cmd, err } lxcConf := NewLxcConfig(lc) var ( domainname string hostname = *flHostname parts = strings.SplitN(hostname, ".", 2) ) if len(parts) > 1 { hostname = parts[0] domainname = parts[1] } ports, portBindings, err := nat.ParsePortSpecs(flPublish.GetAll()) if err != nil { return nil, nil, cmd, err } // Merge in exposed ports to the map of published ports for _, e := range flExpose.GetAll() { if strings.Contains(e, ":") { return nil, nil, cmd, fmt.Errorf("Invalid port format for --expose: %s", e) } //support two formats for expose, original format /[] or /[] proto, port := nat.SplitProtoPort(e) //parse the start and end port and create a sequence of ports to expose //if expose a port, the start and end port are the same start, end, err := parsers.ParsePortRange(port) if err != nil { return nil, nil, cmd, fmt.Errorf("Invalid range format for --expose: %s, error: %s", e, err) } for i := start; i <= end; i++ { p := nat.NewPort(proto, strconv.FormatUint(i, 10)) if _, exists := ports[p]; !exists { ports[p] = struct{}{} } } } // parse device mappings deviceMappings := []DeviceMapping{} for _, device := range flDevices.GetAll() { deviceMapping, err := ParseDevice(device) if err != nil { return nil, nil, cmd, err } deviceMappings = append(deviceMappings, deviceMapping) } // collect all the environment variables for the container envVariables, err := readKVStrings(flEnvFile.GetAll(), flEnv.GetAll()) if err != nil { return nil, nil, cmd, err } // collect all the labels for the container labels, err := readKVStrings(flLabelsFile.GetAll(), flLabels.GetAll()) if err != nil { return nil, nil, cmd, err } ipcMode := IpcMode(*flIpcMode) if !ipcMode.Valid() { return nil, nil, cmd, fmt.Errorf("--ipc: invalid IPC mode") } pidMode := PidMode(*flPidMode) if !pidMode.Valid() { return nil, nil, cmd, fmt.Errorf("--pid: invalid PID mode") } utsMode := UTSMode(*flUTSMode) if !utsMode.Valid() { return nil, nil, cmd, fmt.Errorf("--uts: invalid UTS mode") } restartPolicy, err := ParseRestartPolicy(*flRestartPolicy) if err != nil { return nil, nil, cmd, err } loggingOpts, err := parseLoggingOpts(*flLoggingDriver, flLoggingOpts.GetAll()) if err != nil { return nil, nil, cmd, err } config := &Config{ Hostname: hostname, Domainname: domainname, ExposedPorts: ports, User: *flUser, Tty: *flTty, NetworkDisabled: !*flNetwork, OpenStdin: *flStdin, AttachStdin: attachStdin, AttachStdout: attachStdout, AttachStderr: attachStderr, Env: envVariables, Cmd: runCmd, Image: image, Volumes: flVolumes.GetMap(), MacAddress: *flMacAddress, Entrypoint: entrypoint, WorkingDir: *flWorkingDir, Labels: convertKVStringsToMap(labels), } hostConfig := &HostConfig{ Binds: binds, ContainerIDFile: *flContainerIDFile, LxcConf: lxcConf, Memory: flMemory, MemorySwap: MemorySwap, CpuShares: *flCpuShares, CpuPeriod: *flCpuPeriod, CpusetCpus: *flCpusetCpus, CpusetMems: *flCpusetMems, CpuQuota: *flCpuQuota, BlkioWeight: *flBlkioWeight, OomKillDisable: *flOomKillDisable, Privileged: *flPrivileged, PortBindings: portBindings, Links: flLinks.GetAll(), PublishAllPorts: *flPublishAll, Dns: flDns.GetAll(), DnsSearch: flDnsSearch.GetAll(), ExtraHosts: flExtraHosts.GetAll(), VolumesFrom: flVolumesFrom.GetAll(), NetworkMode: netMode, IpcMode: ipcMode, PidMode: pidMode, UTSMode: utsMode, Devices: deviceMappings, CapAdd: flCapAdd.GetAll(), CapDrop: flCapDrop.GetAll(), RestartPolicy: restartPolicy, SecurityOpt: flSecurityOpt.GetAll(), ReadonlyRootfs: *flReadonlyRootfs, Ulimits: flUlimits.GetList(), LogConfig: LogConfig{Type: *flLoggingDriver, Config: loggingOpts}, CgroupParent: *flCgroupParent, } applyExperimentalFlags(expFlags, config, hostConfig) // When allocating stdin in attached mode, close stdin at client disconnect if config.OpenStdin && config.AttachStdin { config.StdinOnce = true } return config, hostConfig, cmd, nil } // reads a file of line terminated key=value pairs and override that with override parameter func readKVStrings(files []string, override []string) ([]string, error) { envVariables := []string{} for _, ef := range files { parsedVars, err := opts.ParseEnvFile(ef) if err != nil { return nil, err } envVariables = append(envVariables, parsedVars...) } // parse the '-e' and '--env' after, to allow override envVariables = append(envVariables, override...) return envVariables, nil } // converts ["key=value"] to {"key":"value"} func convertKVStringsToMap(values []string) map[string]string { result := make(map[string]string, len(values)) for _, value := range values { kv := strings.SplitN(value, "=", 2) if len(kv) == 1 { result[kv[0]] = "" } else { result[kv[0]] = kv[1] } } return result } func parseLoggingOpts(loggingDriver string, loggingOpts []string) (map[string]string, error) { loggingOptsMap := convertKVStringsToMap(loggingOpts) if loggingDriver == "none" && len(loggingOpts) > 0 { return map[string]string{}, fmt.Errorf("Invalid logging opts for driver %s", loggingDriver) } //TODO - validation step return loggingOptsMap, nil } // ParseRestartPolicy returns the parsed policy or an error indicating what is incorrect func ParseRestartPolicy(policy string) (RestartPolicy, error) { p := RestartPolicy{} if policy == "" { return p, nil } var ( parts = strings.Split(policy, ":") name = parts[0] ) p.Name = name switch name { case "always": if len(parts) == 2 { return p, fmt.Errorf("maximum restart count not valid with restart policy of \"always\"") } case "no": // do nothing case "on-failure": if len(parts) == 2 { count, err := strconv.Atoi(parts[1]) if err != nil { return p, err } p.MaximumRetryCount = count } default: return p, fmt.Errorf("invalid restart policy %s", name) } return p, nil } func parseKeyValueOpts(opts opts.ListOpts) ([]KeyValuePair, error) { out := make([]KeyValuePair, opts.Len()) for i, o := range opts.GetAll() { k, v, err := parsers.ParseKeyValueOpt(o) if err != nil { return nil, err } out[i] = KeyValuePair{Key: k, Value: v} } return out, nil } func parseNetMode(netMode string) (NetworkMode, error) { parts := strings.Split(netMode, ":") switch mode := parts[0]; mode { case "default", "bridge", "none", "host": case "container": if len(parts) < 2 || parts[1] == "" { return "", fmt.Errorf("invalid container format container:") } default: return "", fmt.Errorf("invalid --net: %s", netMode) } return NetworkMode(netMode), nil } func ParseDevice(device string) (DeviceMapping, error) { src := "" dst := "" permissions := "rwm" arr := strings.Split(device, ":") switch len(arr) { case 3: permissions = arr[2] fallthrough case 2: dst = arr[1] fallthrough case 1: src = arr[0] default: return DeviceMapping{}, fmt.Errorf("Invalid device specification: %s", device) } if dst == "" { dst = src } deviceMapping := DeviceMapping{ PathOnHost: src, PathInContainer: dst, CgroupPermissions: permissions, } return deviceMapping, nil }