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: <name|uid>[:<group|gid>])")
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"}, "bridge", "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
}
// 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 <portnum>/[<proto>] or <startport-endport>/[<proto>]
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
}
// We will receive port specs in the format of ip:public:private/proto and these need to be
// parsed in the internal types
func ParsePortSpecs(ports []string) (map[Port]struct{}, map[Port][]PortBinding, error) {
var (
exposedPorts = make(map[Port]struct{}, len(ports))
bindings = make(map[Port][]PortBinding)
)
for _, rawPort := range ports {
proto := "tcp"
if i := strings.LastIndex(rawPort, "/"); i != -1 {
proto = rawPort[i+1:]
rawPort = rawPort[:i]
}
if !strings.Contains(rawPort, ":") {
rawPort = fmt.Sprintf("::%s", rawPort)
} else if len(strings.Split(rawPort, ":")) == 2 {
rawPort = fmt.Sprintf(":%s", rawPort)
}
parts, err := parsers.PartParser(PortSpecTemplate, rawPort)
if err != nil {
return nil, nil, err
}
var (
containerPort = parts["containerPort"]
rawIp = parts["ip"]
hostPort = parts["hostPort"]
)
if rawIp != "" && net.ParseIP(rawIp) == nil {
return nil, nil, fmt.Errorf("Invalid ip address: %s", rawIp)
}
if containerPort == "" {
return nil, nil, fmt.Errorf("No port specified: %s<empty>", rawPort)
}
startPort, endPort, err := parsers.ParsePortRange(containerPort)
if err != nil {
return nil, nil, fmt.Errorf("Invalid containerPort: %s", containerPort)
}
var startHostPort, endHostPort uint64 = 0, 0
if len(hostPort) > 0 {
startHostPort, endHostPort, err = parsers.ParsePortRange(hostPort)
if err != nil {
return nil, nil, fmt.Errorf("Invalid hostPort: %s", hostPort)
}
}
if hostPort != "" && (endPort-startPort) != (endHostPort-startHostPort) {
return nil, nil, fmt.Errorf("Invalid ranges specified for container and host Ports: %s and %s", containerPort, hostPort)
}
if !validateProto(strings.ToLower(proto)) {
return nil, nil, fmt.Errorf("Invalid proto: %s", proto)
}
for i := uint64(0); i <= (endPort - startPort); i++ {
containerPort = strconv.FormatUint(startPort+i, 10)
if len(hostPort) > 0 {
hostPort = strconv.FormatUint(startHostPort+i, 10)
}
port := NewPort(strings.ToLower(proto), containerPort)
if _, exists := exposedPorts[port]; !exists {
exposedPorts[port] = struct{}{}
}
binding := PortBinding{
HostIp: rawIp,
HostPort: hostPort,
}
bslice, exists := bindings[port]
if !exists {
bslice = []PortBinding{}
}
bindings[port] = append(bslice, binding)
}
}
return exposedPorts, bindings, nil
}