mirror of
https://github.com/moby/moby.git
synced 2022-11-09 12:21:53 -05:00
285 lines
8.4 KiB
Go
285 lines
8.4 KiB
Go
package container
|
|
|
|
import (
|
|
"fmt"
|
|
"io"
|
|
"net/http/httputil"
|
|
"os"
|
|
"runtime"
|
|
"strings"
|
|
"syscall"
|
|
|
|
"golang.org/x/net/context"
|
|
|
|
"github.com/Sirupsen/logrus"
|
|
"github.com/docker/docker/api/types"
|
|
"github.com/docker/docker/cli"
|
|
"github.com/docker/docker/cli/command"
|
|
opttypes "github.com/docker/docker/opts"
|
|
"github.com/docker/docker/pkg/promise"
|
|
"github.com/docker/docker/pkg/signal"
|
|
runconfigopts "github.com/docker/docker/runconfig/opts"
|
|
"github.com/docker/libnetwork/resolvconf/dns"
|
|
"github.com/spf13/cobra"
|
|
"github.com/spf13/pflag"
|
|
)
|
|
|
|
type runOptions struct {
|
|
detach bool
|
|
sigProxy bool
|
|
name string
|
|
detachKeys string
|
|
}
|
|
|
|
// NewRunCommand create a new `docker run` command
|
|
func NewRunCommand(dockerCli *command.DockerCli) *cobra.Command {
|
|
var opts runOptions
|
|
var copts *runconfigopts.ContainerOptions
|
|
|
|
cmd := &cobra.Command{
|
|
Use: "run [OPTIONS] IMAGE [COMMAND] [ARG...]",
|
|
Short: "Run a command in a new container",
|
|
Args: cli.RequiresMinArgs(1),
|
|
RunE: func(cmd *cobra.Command, args []string) error {
|
|
copts.Image = args[0]
|
|
if len(args) > 1 {
|
|
copts.Args = args[1:]
|
|
}
|
|
return runRun(dockerCli, cmd.Flags(), &opts, copts)
|
|
},
|
|
}
|
|
|
|
flags := cmd.Flags()
|
|
flags.SetInterspersed(false)
|
|
|
|
// These are flags not stored in Config/HostConfig
|
|
flags.BoolVarP(&opts.detach, "detach", "d", false, "Run container in background and print container ID")
|
|
flags.BoolVar(&opts.sigProxy, "sig-proxy", true, "Proxy received signals to the process")
|
|
flags.StringVar(&opts.name, "name", "", "Assign a name to the container")
|
|
flags.StringVar(&opts.detachKeys, "detach-keys", "", "Override the key sequence for detaching a container")
|
|
|
|
// Add an explicit help that doesn't have a `-h` to prevent the conflict
|
|
// with hostname
|
|
flags.Bool("help", false, "Print usage")
|
|
|
|
command.AddTrustedFlags(flags, true)
|
|
copts = runconfigopts.AddFlags(flags)
|
|
return cmd
|
|
}
|
|
|
|
func runRun(dockerCli *command.DockerCli, flags *pflag.FlagSet, opts *runOptions, copts *runconfigopts.ContainerOptions) error {
|
|
stdout, stderr, stdin := dockerCli.Out(), dockerCli.Err(), dockerCli.In()
|
|
client := dockerCli.Client()
|
|
// TODO: pass this as an argument
|
|
cmdPath := "run"
|
|
|
|
var (
|
|
flAttach *opttypes.ListOpts
|
|
ErrConflictAttachDetach = fmt.Errorf("Conflicting options: -a and -d")
|
|
ErrConflictRestartPolicyAndAutoRemove = fmt.Errorf("Conflicting options: --restart and --rm")
|
|
)
|
|
|
|
config, hostConfig, networkingConfig, err := runconfigopts.Parse(flags, copts)
|
|
|
|
// just in case the Parse does not exit
|
|
if err != nil {
|
|
reportError(stderr, cmdPath, err.Error(), true)
|
|
return cli.StatusError{StatusCode: 125}
|
|
}
|
|
|
|
if hostConfig.AutoRemove && !hostConfig.RestartPolicy.IsNone() {
|
|
return ErrConflictRestartPolicyAndAutoRemove
|
|
}
|
|
if hostConfig.OomKillDisable != nil && *hostConfig.OomKillDisable && hostConfig.Memory == 0 {
|
|
fmt.Fprintf(stderr, "WARNING: Disabling the OOM killer on containers without setting a '-m/--memory' limit may be dangerous.\n")
|
|
}
|
|
|
|
if len(hostConfig.DNS) > 0 {
|
|
// check the DNS settings passed via --dns against
|
|
// localhost regexp to warn if they are trying to
|
|
// set a DNS to a localhost address
|
|
for _, dnsIP := range hostConfig.DNS {
|
|
if dns.IsLocalhost(dnsIP) {
|
|
fmt.Fprintf(stderr, "WARNING: Localhost DNS setting (--dns=%s) may fail in containers.\n", dnsIP)
|
|
break
|
|
}
|
|
}
|
|
}
|
|
|
|
config.ArgsEscaped = false
|
|
|
|
if !opts.detach {
|
|
if err := dockerCli.In().CheckTty(config.AttachStdin, config.Tty); err != nil {
|
|
return err
|
|
}
|
|
} else {
|
|
if fl := flags.Lookup("attach"); fl != nil {
|
|
flAttach = fl.Value.(*opttypes.ListOpts)
|
|
if flAttach.Len() != 0 {
|
|
return ErrConflictAttachDetach
|
|
}
|
|
}
|
|
|
|
config.AttachStdin = false
|
|
config.AttachStdout = false
|
|
config.AttachStderr = false
|
|
config.StdinOnce = false
|
|
}
|
|
|
|
// Disable sigProxy when in TTY mode
|
|
if config.Tty {
|
|
opts.sigProxy = false
|
|
}
|
|
|
|
// Telling the Windows daemon the initial size of the tty during start makes
|
|
// a far better user experience rather than relying on subsequent resizes
|
|
// to cause things to catch up.
|
|
if runtime.GOOS == "windows" {
|
|
hostConfig.ConsoleSize[0], hostConfig.ConsoleSize[1] = dockerCli.Out().GetTtySize()
|
|
}
|
|
|
|
ctx, cancelFun := context.WithCancel(context.Background())
|
|
|
|
createResponse, err := createContainer(ctx, dockerCli, config, hostConfig, networkingConfig, hostConfig.ContainerIDFile, opts.name)
|
|
if err != nil {
|
|
reportError(stderr, cmdPath, err.Error(), true)
|
|
return runStartContainerErr(err)
|
|
}
|
|
if opts.sigProxy {
|
|
sigc := ForwardAllSignals(ctx, dockerCli, createResponse.ID)
|
|
defer signal.StopCatch(sigc)
|
|
}
|
|
var (
|
|
waitDisplayID chan struct{}
|
|
errCh chan error
|
|
)
|
|
if !config.AttachStdout && !config.AttachStderr {
|
|
// Make this asynchronous to allow the client to write to stdin before having to read the ID
|
|
waitDisplayID = make(chan struct{})
|
|
go func() {
|
|
defer close(waitDisplayID)
|
|
fmt.Fprintf(stdout, "%s\n", createResponse.ID)
|
|
}()
|
|
}
|
|
attach := config.AttachStdin || config.AttachStdout || config.AttachStderr
|
|
if attach {
|
|
var (
|
|
out, cerr io.Writer
|
|
in io.ReadCloser
|
|
)
|
|
if config.AttachStdin {
|
|
in = stdin
|
|
}
|
|
if config.AttachStdout {
|
|
out = stdout
|
|
}
|
|
if config.AttachStderr {
|
|
if config.Tty {
|
|
cerr = stdout
|
|
} else {
|
|
cerr = stderr
|
|
}
|
|
}
|
|
|
|
if opts.detachKeys != "" {
|
|
dockerCli.ConfigFile().DetachKeys = opts.detachKeys
|
|
}
|
|
|
|
options := types.ContainerAttachOptions{
|
|
Stream: true,
|
|
Stdin: config.AttachStdin,
|
|
Stdout: config.AttachStdout,
|
|
Stderr: config.AttachStderr,
|
|
DetachKeys: dockerCli.ConfigFile().DetachKeys,
|
|
}
|
|
|
|
resp, errAttach := client.ContainerAttach(ctx, createResponse.ID, options)
|
|
if errAttach != nil && errAttach != httputil.ErrPersistEOF {
|
|
// ContainerAttach returns an ErrPersistEOF (connection closed)
|
|
// means server met an error and put it in Hijacked connection
|
|
// keep the error and read detailed error message from hijacked connection later
|
|
return errAttach
|
|
}
|
|
defer resp.Close()
|
|
|
|
errCh = promise.Go(func() error {
|
|
errHijack := holdHijackedConnection(ctx, dockerCli, config.Tty, in, out, cerr, resp)
|
|
if errHijack == nil {
|
|
return errAttach
|
|
}
|
|
return errHijack
|
|
})
|
|
}
|
|
|
|
statusChan := waitExitOrRemoved(ctx, dockerCli, createResponse.ID, hostConfig.AutoRemove)
|
|
|
|
//start the container
|
|
if err := client.ContainerStart(ctx, createResponse.ID, types.ContainerStartOptions{}); err != nil {
|
|
// If we have holdHijackedConnection, we should notify
|
|
// holdHijackedConnection we are going to exit and wait
|
|
// to avoid the terminal are not restored.
|
|
if attach {
|
|
cancelFun()
|
|
<-errCh
|
|
}
|
|
|
|
reportError(stderr, cmdPath, err.Error(), false)
|
|
if hostConfig.AutoRemove {
|
|
// wait container to be removed
|
|
<-statusChan
|
|
}
|
|
return runStartContainerErr(err)
|
|
}
|
|
|
|
if (config.AttachStdin || config.AttachStdout || config.AttachStderr) && config.Tty && dockerCli.Out().IsTerminal() {
|
|
if err := MonitorTtySize(ctx, dockerCli, createResponse.ID, false); err != nil {
|
|
fmt.Fprintf(stderr, "Error monitoring TTY size: %s\n", err)
|
|
}
|
|
}
|
|
|
|
if errCh != nil {
|
|
if err := <-errCh; err != nil {
|
|
logrus.Debugf("Error hijack: %s", err)
|
|
return err
|
|
}
|
|
}
|
|
|
|
// Detached mode: wait for the id to be displayed and return.
|
|
if !config.AttachStdout && !config.AttachStderr {
|
|
// Detached mode
|
|
<-waitDisplayID
|
|
return nil
|
|
}
|
|
|
|
status := <-statusChan
|
|
if status != 0 {
|
|
return cli.StatusError{StatusCode: status}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// reportError is a utility method that prints a user-friendly message
|
|
// containing the error that occurred during parsing and a suggestion to get help
|
|
func reportError(stderr io.Writer, name string, str string, withHelp bool) {
|
|
if withHelp {
|
|
str += ".\nSee '" + os.Args[0] + " " + name + " --help'"
|
|
}
|
|
fmt.Fprintf(stderr, "%s: %s.\n", os.Args[0], str)
|
|
}
|
|
|
|
// if container start fails with 'not found'/'no such' error, return 127
|
|
// if container start fails with 'permission denied' error, return 126
|
|
// return 125 for generic docker daemon failures
|
|
func runStartContainerErr(err error) error {
|
|
trimmedErr := strings.TrimPrefix(err.Error(), "Error response from daemon: ")
|
|
statusError := cli.StatusError{StatusCode: 125}
|
|
if strings.Contains(trimmedErr, "executable file not found") ||
|
|
strings.Contains(trimmedErr, "no such file or directory") ||
|
|
strings.Contains(trimmedErr, "system cannot find the file specified") {
|
|
statusError = cli.StatusError{StatusCode: 127}
|
|
} else if strings.Contains(trimmedErr, syscall.EACCES.Error()) {
|
|
statusError = cli.StatusError{StatusCode: 126}
|
|
}
|
|
|
|
return statusError
|
|
}
|