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Return status exit status 2 on usage, move parserun into commands.go, display usage on stderr

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This commit is contained in:
Victor Vieux 2013-11-20 17:41:25 -08:00
parent eaeb969138
commit 75a7f4d90c
2 changed files with 252 additions and 249 deletions
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288
commands.go
View file

@ -22,6 +22,7 @@ import (
"net/url"
"os"
"os/signal"
"path"
"path/filepath"
"reflect"
"regexp"
@ -119,7 +120,7 @@ func (cli *DockerCli) CmdHelp(args ...string) error {
}
func (cli *DockerCli) CmdInsert(args ...string) error {
cmd := Subcmd("insert", "IMAGE URL PATH", "Insert a file from URL in the IMAGE at PATH")
cmd := cli.Subcmd("insert", "IMAGE URL PATH", "Insert a file from URL in the IMAGE at PATH")
if err := cmd.Parse(args); err != nil {
return nil
}
@ -161,7 +162,7 @@ func MkBuildContext(dockerfile string, files [][2]string) (archive.Archive, erro
}
func (cli *DockerCli) CmdBuild(args ...string) error {
cmd := Subcmd("build", "[OPTIONS] PATH | URL | -", "Build a new container image from the source code at PATH")
cmd := cli.Subcmd("build", "[OPTIONS] PATH | URL | -", "Build a new container image from the source code at PATH")
tag := cmd.String("t", "", "Repository name (and optionally a tag) to be applied to the resulting image in case of success")
suppressOutput := cmd.Bool("q", false, "Suppress verbose build output")
noCache := cmd.Bool("no-cache", false, "Do not use cache when building the image")
@ -259,7 +260,7 @@ func (cli *DockerCli) CmdBuild(args ...string) error {
// 'docker login': login / register a user to registry service.
func (cli *DockerCli) CmdLogin(args ...string) error {
cmd := Subcmd("login", "[OPTIONS] [SERVER]", "Register or Login to a docker registry server, if no server is specified \""+auth.IndexServerAddress()+"\" is the default.")
cmd := cli.Subcmd("login", "[OPTIONS] [SERVER]", "Register or Login to a docker registry server, if no server is specified \""+auth.IndexServerAddress()+"\" is the default.")
var username, password, email string
@ -367,7 +368,7 @@ func (cli *DockerCli) CmdLogin(args ...string) error {
// 'docker wait': block until a container stops
func (cli *DockerCli) CmdWait(args ...string) error {
cmd := Subcmd("wait", "CONTAINER [CONTAINER...]", "Block until a container stops, then print its exit code.")
cmd := cli.Subcmd("wait", "CONTAINER [CONTAINER...]", "Block until a container stops, then print its exit code.")
if err := cmd.Parse(args); err != nil {
return nil
}
@ -390,7 +391,7 @@ func (cli *DockerCli) CmdWait(args ...string) error {
// 'docker version': show version information
func (cli *DockerCli) CmdVersion(args ...string) error {
cmd := Subcmd("version", "", "Show the docker version information.")
cmd := cli.Subcmd("version", "", "Show the docker version information.")
if err := cmd.Parse(args); err != nil {
return nil
}
@ -441,7 +442,7 @@ func (cli *DockerCli) CmdVersion(args ...string) error {
// 'docker info': display system-wide information.
func (cli *DockerCli) CmdInfo(args ...string) error {
cmd := Subcmd("info", "", "Display system-wide information")
cmd := cli.Subcmd("info", "", "Display system-wide information")
if err := cmd.Parse(args); err != nil {
return nil
}
@ -493,7 +494,7 @@ func (cli *DockerCli) CmdInfo(args ...string) error {
}
func (cli *DockerCli) CmdStop(args ...string) error {
cmd := Subcmd("stop", "[OPTIONS] CONTAINER [CONTAINER...]", "Stop a running container (Send SIGTERM, and then SIGKILL after grace period)")
cmd := cli.Subcmd("stop", "[OPTIONS] CONTAINER [CONTAINER...]", "Stop a running container (Send SIGTERM, and then SIGKILL after grace period)")
nSeconds := cmd.Int("t", 10, "Number of seconds to wait for the container to stop before killing it.")
if err := cmd.Parse(args); err != nil {
return nil
@ -520,7 +521,7 @@ func (cli *DockerCli) CmdStop(args ...string) error {
}
func (cli *DockerCli) CmdRestart(args ...string) error {
cmd := Subcmd("restart", "[OPTIONS] CONTAINER [CONTAINER...]", "Restart a running container")
cmd := cli.Subcmd("restart", "[OPTIONS] CONTAINER [CONTAINER...]", "Restart a running container")
nSeconds := cmd.Int("t", 10, "Number of seconds to try to stop for before killing the container. Once killed it will then be restarted. Default=10")
if err := cmd.Parse(args); err != nil {
return nil
@ -563,7 +564,7 @@ func (cli *DockerCli) forwardAllSignals(cid string) chan os.Signal {
}
func (cli *DockerCli) CmdStart(args ...string) error {
cmd := Subcmd("start", "CONTAINER [CONTAINER...]", "Restart a stopped container")
cmd := cli.Subcmd("start", "CONTAINER [CONTAINER...]", "Restart a stopped container")
attach := cmd.Bool("a", false, "Attach container's stdout/stderr and forward all signals to the process")
openStdin := cmd.Bool("i", false, "Attach container's stdin")
if err := cmd.Parse(args); err != nil {
@ -649,7 +650,7 @@ func (cli *DockerCli) CmdStart(args ...string) error {
}
func (cli *DockerCli) CmdInspect(args ...string) error {
cmd := Subcmd("inspect", "CONTAINER|IMAGE [CONTAINER|IMAGE...]", "Return low-level information on a container/image")
cmd := cli.Subcmd("inspect", "CONTAINER|IMAGE [CONTAINER|IMAGE...]", "Return low-level information on a container/image")
if err := cmd.Parse(args); err != nil {
return nil
}
@ -700,7 +701,7 @@ func (cli *DockerCli) CmdInspect(args ...string) error {
}
func (cli *DockerCli) CmdTop(args ...string) error {
cmd := Subcmd("top", "CONTAINER [ps OPTIONS]", "Lookup the running processes of a container")
cmd := cli.Subcmd("top", "CONTAINER [ps OPTIONS]", "Lookup the running processes of a container")
if err := cmd.Parse(args); err != nil {
return nil
}
@ -732,7 +733,7 @@ func (cli *DockerCli) CmdTop(args ...string) error {
}
func (cli *DockerCli) CmdPort(args ...string) error {
cmd := Subcmd("port", "CONTAINER PRIVATE_PORT", "Lookup the public-facing port which is NAT-ed to PRIVATE_PORT")
cmd := cli.Subcmd("port", "CONTAINER PRIVATE_PORT", "Lookup the public-facing port which is NAT-ed to PRIVATE_PORT")
if err := cmd.Parse(args); err != nil {
return nil
}
@ -774,7 +775,7 @@ func (cli *DockerCli) CmdPort(args ...string) error {
// 'docker rmi IMAGE' removes all images with the name IMAGE
func (cli *DockerCli) CmdRmi(args ...string) error {
cmd := Subcmd("rmi", "IMAGE [IMAGE...]", "Remove one or more images")
cmd := cli.Subcmd("rmi", "IMAGE [IMAGE...]", "Remove one or more images")
if err := cmd.Parse(args); err != nil {
return nil
}
@ -810,7 +811,7 @@ func (cli *DockerCli) CmdRmi(args ...string) error {
}
func (cli *DockerCli) CmdHistory(args ...string) error {
cmd := Subcmd("history", "[OPTIONS] IMAGE", "Show the history of an image")
cmd := cli.Subcmd("history", "[OPTIONS] IMAGE", "Show the history of an image")
quiet := cmd.Bool("q", false, "only show numeric IDs")
noTrunc := cmd.Bool("notrunc", false, "Don't truncate output")
@ -867,7 +868,7 @@ func (cli *DockerCli) CmdHistory(args ...string) error {
}
func (cli *DockerCli) CmdRm(args ...string) error {
cmd := Subcmd("rm", "[OPTIONS] CONTAINER [CONTAINER...]", "Remove one or more containers")
cmd := cli.Subcmd("rm", "[OPTIONS] CONTAINER [CONTAINER...]", "Remove one or more containers")
v := cmd.Bool("v", false, "Remove the volumes associated to the container")
link := cmd.Bool("link", false, "Remove the specified link and not the underlying container")
@ -901,7 +902,7 @@ func (cli *DockerCli) CmdRm(args ...string) error {
// 'docker kill NAME' kills a running container
func (cli *DockerCli) CmdKill(args ...string) error {
cmd := Subcmd("kill", "CONTAINER [CONTAINER...]", "Kill a running container (send SIGKILL)")
cmd := cli.Subcmd("kill", "CONTAINER [CONTAINER...]", "Kill a running container (send SIGKILL)")
if err := cmd.Parse(args); err != nil {
return nil
}
@ -923,7 +924,7 @@ func (cli *DockerCli) CmdKill(args ...string) error {
}
func (cli *DockerCli) CmdImport(args ...string) error {
cmd := Subcmd("import", "URL|- [REPOSITORY[:TAG]]", "Create a new filesystem image from the contents of a tarball(.tar, .tar.gz, .tgz, .bzip, .tar.xz, .txz).")
cmd := cli.Subcmd("import", "URL|- [REPOSITORY[:TAG]]", "Create a new filesystem image from the contents of a tarball(.tar, .tar.gz, .tgz, .bzip, .tar.xz, .txz).")
if err := cmd.Parse(args); err != nil {
return nil
@ -957,7 +958,7 @@ func (cli *DockerCli) CmdImport(args ...string) error {
}
func (cli *DockerCli) CmdPush(args ...string) error {
cmd := Subcmd("push", "NAME", "Push an image or a repository to the registry")
cmd := cli.Subcmd("push", "NAME", "Push an image or a repository to the registry")
if err := cmd.Parse(args); err != nil {
return nil
}
@ -1019,7 +1020,7 @@ func (cli *DockerCli) CmdPush(args ...string) error {
}
func (cli *DockerCli) CmdPull(args ...string) error {
cmd := Subcmd("pull", "NAME", "Pull an image or a repository from the registry")
cmd := cli.Subcmd("pull", "NAME", "Pull an image or a repository from the registry")
tag := cmd.String("t", "", "Download tagged image in repository")
if err := cmd.Parse(args); err != nil {
return nil
@ -1079,7 +1080,7 @@ func (cli *DockerCli) CmdPull(args ...string) error {
}
func (cli *DockerCli) CmdImages(args ...string) error {
cmd := Subcmd("images", "[OPTIONS] [NAME]", "List images")
cmd := cli.Subcmd("images", "[OPTIONS] [NAME]", "List images")
quiet := cmd.Bool("q", false, "only show numeric IDs")
all := cmd.Bool("a", false, "show all images (by default filter out the intermediate images used to build)")
noTrunc := cmd.Bool("notrunc", false, "Don't truncate output")
@ -1276,7 +1277,7 @@ func displayablePorts(ports []APIPort) string {
}
func (cli *DockerCli) CmdPs(args ...string) error {
cmd := Subcmd("ps", "[OPTIONS]", "List containers")
cmd := cli.Subcmd("ps", "[OPTIONS]", "List containers")
quiet := cmd.Bool("q", false, "Only display numeric IDs")
size := cmd.Bool("s", false, "Display sizes")
all := cmd.Bool("a", false, "Show all containers. Only running containers are shown by default.")
@ -1365,7 +1366,7 @@ func (cli *DockerCli) CmdPs(args ...string) error {
}
func (cli *DockerCli) CmdCommit(args ...string) error {
cmd := Subcmd("commit", "[OPTIONS] CONTAINER [REPOSITORY[:TAG]]", "Create a new image from a container's changes")
cmd := cli.Subcmd("commit", "[OPTIONS] CONTAINER [REPOSITORY[:TAG]]", "Create a new image from a container's changes")
flComment := cmd.String("m", "", "Commit message")
flAuthor := cmd.String("author", "", "Author (eg. \"John Hannibal Smith <hannibal@a-team.com>\"")
flConfig := cmd.String("run", "", "Config automatically applied when the image is run. "+`(ex: {"Cmd": ["cat", "/world"], "PortSpecs": ["22"]}')`)
@ -1417,7 +1418,7 @@ func (cli *DockerCli) CmdCommit(args ...string) error {
}
func (cli *DockerCli) CmdEvents(args ...string) error {
cmd := Subcmd("events", "[OPTIONS]", "Get real time events from the server")
cmd := cli.Subcmd("events", "[OPTIONS]", "Get real time events from the server")
since := cmd.String("since", "", "Show previously created events and then stream.")
if err := cmd.Parse(args); err != nil {
return nil
@ -1450,7 +1451,7 @@ func (cli *DockerCli) CmdEvents(args ...string) error {
}
func (cli *DockerCli) CmdExport(args ...string) error {
cmd := Subcmd("export", "CONTAINER", "Export the contents of a filesystem as a tar archive")
cmd := cli.Subcmd("export", "CONTAINER", "Export the contents of a filesystem as a tar archive")
if err := cmd.Parse(args); err != nil {
return nil
}
@ -1467,7 +1468,7 @@ func (cli *DockerCli) CmdExport(args ...string) error {
}
func (cli *DockerCli) CmdDiff(args ...string) error {
cmd := Subcmd("diff", "CONTAINER", "Inspect changes on a container's filesystem")
cmd := cli.Subcmd("diff", "CONTAINER", "Inspect changes on a container's filesystem")
if err := cmd.Parse(args); err != nil {
return nil
}
@ -1493,7 +1494,7 @@ func (cli *DockerCli) CmdDiff(args ...string) error {
}
func (cli *DockerCli) CmdLogs(args ...string) error {
cmd := Subcmd("logs", "CONTAINER", "Fetch the logs of a container")
cmd := cli.Subcmd("logs", "CONTAINER", "Fetch the logs of a container")
if err := cmd.Parse(args); err != nil {
return nil
}
@ -1520,7 +1521,7 @@ func (cli *DockerCli) CmdLogs(args ...string) error {
}
func (cli *DockerCli) CmdAttach(args ...string) error {
cmd := Subcmd("attach", "[OPTIONS] CONTAINER", "Attach to a running container")
cmd := cli.Subcmd("attach", "[OPTIONS] CONTAINER", "Attach to a running container")
noStdin := cmd.Bool("nostdin", false, "Do not attach stdin")
proxy := cmd.Bool("sig-proxy", true, "Proxify all received signal to the process (even in non-tty mode)")
if err := cmd.Parse(args); err != nil {
@ -1575,7 +1576,7 @@ func (cli *DockerCli) CmdAttach(args ...string) error {
}
func (cli *DockerCli) CmdSearch(args ...string) error {
cmd := Subcmd("search", "TERM", "Search the docker index for images")
cmd := cli.Subcmd("search", "TERM", "Search the docker index for images")
noTrunc := cmd.Bool("notrunc", false, "Don't truncate output")
trusted := cmd.Bool("trusted", false, "Only show trusted builds")
stars := cmd.Int("stars", 0, "Only displays with at least xxx stars")
@ -1687,7 +1688,7 @@ func (opts PathOpts) Set(val string) error {
}
func (cli *DockerCli) CmdTag(args ...string) error {
cmd := Subcmd("tag", "[OPTIONS] IMAGE REPOSITORY[:TAG]", "Tag an image into a repository")
cmd := cli.Subcmd("tag", "[OPTIONS] IMAGE REPOSITORY[:TAG]", "Tag an image into a repository")
force := cmd.Bool("f", false, "Force")
if err := cmd.Parse(args); err != nil {
return nil
@ -1720,8 +1721,223 @@ func (cli *DockerCli) CmdTag(args ...string) error {
return nil
}
//FIXME Only used in tests
func ParseRun(args []string, capabilities *Capabilities) (*Config, *HostConfig, *flag.FlagSet, error) {
cmd := flag.NewFlagSet("run", flag.ContinueOnError)
cmd.SetOutput(ioutil.Discard)
cmd.Usage = nil
return parseRun(cmd, args, capabilities)
}
func parseRun(cmd *flag.FlagSet, args []string, capabilities *Capabilities) (*Config, *HostConfig, *flag.FlagSet, error) {
flHostname := cmd.String("h", "", "Container host name")
flWorkingDir := cmd.String("w", "", "Working directory inside the container")
flUser := cmd.String("u", "", "Username or UID")
flDetach := cmd.Bool("d", false, "Detached mode: Run container in the background, print new container id")
flAttach := NewAttachOpts()
cmd.Var(flAttach, "a", "Attach to stdin, stdout or stderr.")
flStdin := cmd.Bool("i", false, "Keep stdin open even if not attached")
flTty := cmd.Bool("t", false, "Allocate a pseudo-tty")
flMemoryString := cmd.String("m", "", "Memory limit (format: <number><optional unit>, where unit = b, k, m or g)")
flContainerIDFile := cmd.String("cidfile", "", "Write the container ID to the file")
flNetwork := cmd.Bool("n", true, "Enable networking for this container")
flPrivileged := cmd.Bool("privileged", false, "Give extended privileges to this container")
flAutoRemove := cmd.Bool("rm", false, "Automatically remove the container when it exits (incompatible with -d)")
cmd.Bool("sig-proxy", true, "Proxify all received signal to the process (even in non-tty mode)")
cmd.String("name", "", "Assign a name to the container")
flPublishAll := cmd.Bool("P", false, "Publish all exposed ports to the host interfaces")
if capabilities != nil && *flMemoryString != "" && !capabilities.MemoryLimit {
//fmt.Fprintf(stdout, "WARNING: Your kernel does not support memory limit capabilities. Limitation discarded.\n")
*flMemoryString = ""
}
flCpuShares := cmd.Int64("c", 0, "CPU shares (relative weight)")
var flPublish utils.ListOpts
cmd.Var(&flPublish, "p", "Publish a container's port to the host (use 'docker port' to see the actual mapping)")
var flExpose utils.ListOpts
cmd.Var(&flExpose, "expose", "Expose a port from the container without publishing it to your host")
var flEnv utils.ListOpts
cmd.Var(&flEnv, "e", "Set environment variables")
var flDns utils.ListOpts
cmd.Var(&flDns, "dns", "Set custom dns servers")
flVolumes := NewPathOpts()
cmd.Var(flVolumes, "v", "Bind mount a volume (e.g. from the host: -v /host:/container, from docker: -v /container)")
var flVolumesFrom utils.ListOpts
cmd.Var(&flVolumesFrom, "volumes-from", "Mount volumes from the specified container(s)")
flEntrypoint := cmd.String("entrypoint", "", "Overwrite the default entrypoint of the image")
var flLxcOpts utils.ListOpts
cmd.Var(&flLxcOpts, "lxc-conf", "Add custom lxc options -lxc-conf=\"lxc.cgroup.cpuset.cpus = 0,1\"")
var flLinks utils.ListOpts
cmd.Var(&flLinks, "link", "Add link to another container (name:alias)")
if err := cmd.Parse(args); err != nil {
return nil, nil, cmd, err
}
if *flDetach && len(flAttach) > 0 {
return nil, nil, cmd, ErrConflictAttachDetach
}
if *flWorkingDir != "" && !path.IsAbs(*flWorkingDir) {
return nil, nil, cmd, ErrInvalidWorikingDirectory
}
if *flDetach && *flAutoRemove {
return nil, nil, cmd, ErrConflictDetachAutoRemove
}
// If neither -d or -a are set, attach to everything by default
if len(flAttach) == 0 && !*flDetach {
if !*flDetach {
flAttach.Set("stdout")
flAttach.Set("stderr")
if *flStdin {
flAttach.Set("stdin")
}
}
}
envs := []string{}
for _, env := range flEnv {
arr := strings.Split(env, "=")
if len(arr) > 1 {
envs = append(envs, env)
} else {
v := os.Getenv(env)
envs = append(envs, env+"="+v)
}
}
var flMemory int64
if *flMemoryString != "" {
parsedMemory, err := utils.RAMInBytes(*flMemoryString)
if err != nil {
return nil, nil, cmd, err
}
flMemory = parsedMemory
}
var binds []string
// add any bind targets to the list of container volumes
for bind := range flVolumes {
arr := strings.Split(bind, ":")
if len(arr) > 1 {
if arr[0] == "/" {
return nil, nil, cmd, fmt.Errorf("Invalid bind mount: source can't be '/'")
}
dstDir := arr[1]
flVolumes[dstDir] = struct{}{}
binds = append(binds, bind)
delete(flVolumes, bind)
}
}
parsedArgs := cmd.Args()
runCmd := []string{}
entrypoint := []string{}
image := ""
if len(parsedArgs) >= 1 {
image = cmd.Arg(0)
}
if len(parsedArgs) > 1 {
runCmd = parsedArgs[1:]
}
if *flEntrypoint != "" {
entrypoint = []string{*flEntrypoint}
}
var lxcConf []KeyValuePair
lxcConf, err := parseLxcConfOpts(flLxcOpts)
if err != nil {
return nil, nil, cmd, err
}
hostname := *flHostname
domainname := ""
parts := strings.SplitN(hostname, ".", 2)
if len(parts) > 1 {
hostname = parts[0]
domainname = parts[1]
}
ports, portBindings, err := parsePortSpecs(flPublish)
if err != nil {
return nil, nil, cmd, err
}
// Merge in exposed ports to the map of published ports
for _, e := range flExpose {
if strings.Contains(e, ":") {
return nil, nil, cmd, fmt.Errorf("Invalid port format for -expose: %s", e)
}
p := NewPort(splitProtoPort(e))
if _, exists := ports[p]; !exists {
ports[p] = struct{}{}
}
}
config := &Config{
Hostname: hostname,
Domainname: domainname,
PortSpecs: nil, // Deprecated
ExposedPorts: ports,
User: *flUser,
Tty: *flTty,
NetworkDisabled: !*flNetwork,
OpenStdin: *flStdin,
Memory: flMemory,
CpuShares: *flCpuShares,
AttachStdin: flAttach.Get("stdin"),
AttachStdout: flAttach.Get("stdout"),
AttachStderr: flAttach.Get("stderr"),
Env: envs,
Cmd: runCmd,
Dns: flDns,
Image: image,
Volumes: flVolumes,
VolumesFrom: strings.Join(flVolumesFrom, ","),
Entrypoint: entrypoint,
WorkingDir: *flWorkingDir,
}
hostConfig := &HostConfig{
Binds: binds,
ContainerIDFile: *flContainerIDFile,
LxcConf: lxcConf,
Privileged: *flPrivileged,
PortBindings: portBindings,
Links: flLinks,
PublishAllPorts: *flPublishAll,
}
if capabilities != nil && flMemory > 0 && !capabilities.SwapLimit {
//fmt.Fprintf(stdout, "WARNING: Your kernel does not support swap limit capabilities. Limitation discarded.\n")
config.MemorySwap = -1
}
// When allocating stdin in attached mode, close stdin at client disconnect
if config.OpenStdin && config.AttachStdin {
config.StdinOnce = true
}
return config, hostConfig, cmd, nil
}
func (cli *DockerCli) CmdRun(args ...string) error {
config, hostConfig, cmd, err := ParseRun(args, nil)
config, hostConfig, cmd, err := parseRun(cli.Subcmd("run", "[OPTIONS] IMAGE [COMMAND] [ARG...]", "Run a command in a new container"), args, nil)
if err != nil {
return err
}
@ -1932,7 +2148,7 @@ func (cli *DockerCli) CmdRun(args ...string) error {
}
func (cli *DockerCli) CmdCp(args ...string) error {
cmd := Subcmd("cp", "CONTAINER:PATH HOSTPATH", "Copy files/folders from the PATH to the HOSTPATH")
cmd := cli.Subcmd("cp", "CONTAINER:PATH HOSTPATH", "Copy files/folders from the PATH to the HOSTPATH")
if err := cmd.Parse(args); err != nil {
return nil
}
@ -1967,7 +2183,7 @@ func (cli *DockerCli) CmdCp(args ...string) error {
}
func (cli *DockerCli) CmdSave(args ...string) error {
cmd := Subcmd("save", "IMAGE DESTINATION", "Save an image to a tar archive")
cmd := cli.Subcmd("save", "IMAGE DESTINATION", "Save an image to a tar archive")
if err := cmd.Parse(args); err != nil {
return err
}
@ -1985,7 +2201,7 @@ func (cli *DockerCli) CmdSave(args ...string) error {
}
func (cli *DockerCli) CmdLoad(args ...string) error {
cmd := Subcmd("load", "SOURCE", "Load an image from a tar archive")
cmd := cli.Subcmd("load", "SOURCE", "Load an image from a tar archive")
if err := cmd.Parse(args); err != nil {
return err
}
@ -2251,12 +2467,12 @@ func (cli *DockerCli) monitorTtySize(id string) error {
return nil
}
func Subcmd(name, signature, description string) *flag.FlagSet {
func (cli *DockerCli) Subcmd(name, signature, description string) *flag.FlagSet {
flags := flag.NewFlagSet(name, flag.ContinueOnError)
flags.Usage = func() {
// FIXME: use custom stdout or return error
fmt.Fprintf(os.Stdout, "\nUsage: docker %s %s\n\n%s\n\n", name, signature, description)
fmt.Fprintf(cli.err, "\nUsage: docker %s %s\n\n%s\n\n", name, signature, description)
flags.PrintDefaults()
os.Exit(2)
}
return flags
}

213
container.go
View file

@ -4,7 +4,6 @@ import (
"bytes"
"encoding/json"
"errors"
"flag"
"fmt"
"github.com/dotcloud/docker/archive"
"github.com/dotcloud/docker/term"
@ -156,218 +155,6 @@ func NewPort(proto, port string) Port {
return Port(fmt.Sprintf("%s/%s", port, proto))
}
func ParseRun(args []string, capabilities *Capabilities) (*Config, *HostConfig, *flag.FlagSet, error) {
cmd := Subcmd("run", "[OPTIONS] IMAGE [COMMAND] [ARG...]", "Run a command in a new container")
if os.Getenv("TEST") != "" {
cmd.SetOutput(ioutil.Discard)
cmd.Usage = nil
}
flHostname := cmd.String("h", "", "Container host name")
flWorkingDir := cmd.String("w", "", "Working directory inside the container")
flUser := cmd.String("u", "", "Username or UID")
flDetach := cmd.Bool("d", false, "Detached mode: Run container in the background, print new container id")
flAttach := NewAttachOpts()
cmd.Var(flAttach, "a", "Attach to stdin, stdout or stderr.")
flStdin := cmd.Bool("i", false, "Keep stdin open even if not attached")
flTty := cmd.Bool("t", false, "Allocate a pseudo-tty")
flMemoryString := cmd.String("m", "", "Memory limit (format: <number><optional unit>, where unit = b, k, m or g)")
flContainerIDFile := cmd.String("cidfile", "", "Write the container ID to the file")
flNetwork := cmd.Bool("n", true, "Enable networking for this container")
flPrivileged := cmd.Bool("privileged", false, "Give extended privileges to this container")
flAutoRemove := cmd.Bool("rm", false, "Automatically remove the container when it exits (incompatible with -d)")
cmd.Bool("sig-proxy", true, "Proxify all received signal to the process (even in non-tty mode)")
cmd.String("name", "", "Assign a name to the container")
flPublishAll := cmd.Bool("P", false, "Publish all exposed ports to the host interfaces")
if capabilities != nil && *flMemoryString != "" && !capabilities.MemoryLimit {
//fmt.Fprintf(stdout, "WARNING: Your kernel does not support memory limit capabilities. Limitation discarded.\n")
*flMemoryString = ""
}
flCpuShares := cmd.Int64("c", 0, "CPU shares (relative weight)")
var flPublish utils.ListOpts
cmd.Var(&flPublish, "p", "Publish a container's port to the host (use 'docker port' to see the actual mapping)")
var flExpose utils.ListOpts
cmd.Var(&flExpose, "expose", "Expose a port from the container without publishing it to your host")
var flEnv utils.ListOpts
cmd.Var(&flEnv, "e", "Set environment variables")
var flDns utils.ListOpts
cmd.Var(&flDns, "dns", "Set custom dns servers")
flVolumes := NewPathOpts()
cmd.Var(flVolumes, "v", "Bind mount a volume (e.g. from the host: -v /host:/container, from docker: -v /container)")
var flVolumesFrom utils.ListOpts
cmd.Var(&flVolumesFrom, "volumes-from", "Mount volumes from the specified container(s)")
flEntrypoint := cmd.String("entrypoint", "", "Overwrite the default entrypoint of the image")
var flLxcOpts utils.ListOpts
cmd.Var(&flLxcOpts, "lxc-conf", "Add custom lxc options -lxc-conf=\"lxc.cgroup.cpuset.cpus = 0,1\"")
var flLinks utils.ListOpts
cmd.Var(&flLinks, "link", "Add link to another container (name:alias)")
if err := cmd.Parse(args); err != nil {
return nil, nil, cmd, err
}
if *flDetach && len(flAttach) > 0 {
return nil, nil, cmd, ErrConflictAttachDetach
}
if *flWorkingDir != "" && !path.IsAbs(*flWorkingDir) {
return nil, nil, cmd, ErrInvalidWorikingDirectory
}
if *flDetach && *flAutoRemove {
return nil, nil, cmd, ErrConflictDetachAutoRemove
}
// If neither -d or -a are set, attach to everything by default
if len(flAttach) == 0 && !*flDetach {
if !*flDetach {
flAttach.Set("stdout")
flAttach.Set("stderr")
if *flStdin {
flAttach.Set("stdin")
}
}
}
envs := []string{}
for _, env := range flEnv {
arr := strings.Split(env, "=")
if len(arr) > 1 {
envs = append(envs, env)
} else {
v := os.Getenv(env)
envs = append(envs, env+"="+v)
}
}
var flMemory int64
if *flMemoryString != "" {
parsedMemory, err := utils.RAMInBytes(*flMemoryString)
if err != nil {
return nil, nil, cmd, err
}
flMemory = parsedMemory
}
var binds []string
// add any bind targets to the list of container volumes
for bind := range flVolumes {
arr := strings.Split(bind, ":")
if len(arr) > 1 {
if arr[0] == "/" {
return nil, nil, cmd, fmt.Errorf("Invalid bind mount: source can't be '/'")
}
dstDir := arr[1]
flVolumes[dstDir] = struct{}{}
binds = append(binds, bind)
delete(flVolumes, bind)
}
}
parsedArgs := cmd.Args()
runCmd := []string{}
entrypoint := []string{}
image := ""
if len(parsedArgs) >= 1 {
image = cmd.Arg(0)
}
if len(parsedArgs) > 1 {
runCmd = parsedArgs[1:]
}
if *flEntrypoint != "" {
entrypoint = []string{*flEntrypoint}
}
var lxcConf []KeyValuePair
lxcConf, err := parseLxcConfOpts(flLxcOpts)
if err != nil {
return nil, nil, cmd, err
}
hostname := *flHostname
domainname := ""
parts := strings.SplitN(hostname, ".", 2)
if len(parts) > 1 {
hostname = parts[0]
domainname = parts[1]
}
ports, portBindings, err := parsePortSpecs(flPublish)
if err != nil {
return nil, nil, cmd, err
}
// Merge in exposed ports to the map of published ports
for _, e := range flExpose {
if strings.Contains(e, ":") {
return nil, nil, cmd, fmt.Errorf("Invalid port format for -expose: %s", e)
}
p := NewPort(splitProtoPort(e))
if _, exists := ports[p]; !exists {
ports[p] = struct{}{}
}
}
config := &Config{
Hostname: hostname,
Domainname: domainname,
PortSpecs: nil, // Deprecated
ExposedPorts: ports,
User: *flUser,
Tty: *flTty,
NetworkDisabled: !*flNetwork,
OpenStdin: *flStdin,
Memory: flMemory,
CpuShares: *flCpuShares,
AttachStdin: flAttach.Get("stdin"),
AttachStdout: flAttach.Get("stdout"),
AttachStderr: flAttach.Get("stderr"),
Env: envs,
Cmd: runCmd,
Dns: flDns,
Image: image,
Volumes: flVolumes,
VolumesFrom: strings.Join(flVolumesFrom, ","),
Entrypoint: entrypoint,
WorkingDir: *flWorkingDir,
}
hostConfig := &HostConfig{
Binds: binds,
ContainerIDFile: *flContainerIDFile,
LxcConf: lxcConf,
Privileged: *flPrivileged,
PortBindings: portBindings,
Links: flLinks,
PublishAllPorts: *flPublishAll,
}
if capabilities != nil && flMemory > 0 && !capabilities.SwapLimit {
//fmt.Fprintf(stdout, "WARNING: Your kernel does not support swap limit capabilities. Limitation discarded.\n")
config.MemorySwap = -1
}
// When allocating stdin in attached mode, close stdin at client disconnect
if config.OpenStdin && config.AttachStdin {
config.StdinOnce = true
}
return config, hostConfig, cmd, nil
}
type PortMapping map[string]string // Deprecated
type NetworkSettings struct {