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moby--moby/api/client/create.go
David Calavera 136e8fef64 Implement docker container create with standalone client lib.
Signed-off-by: David Calavera <david.calavera@gmail.com>
2015-12-09 12:04:53 -05:00

193 lines
4.7 KiB
Go

package client
import (
"encoding/base64"
"encoding/json"
"fmt"
"io"
"os"
"github.com/docker/distribution/reference"
"github.com/docker/docker/api/client/lib"
"github.com/docker/docker/api/types"
Cli "github.com/docker/docker/cli"
"github.com/docker/docker/pkg/jsonmessage"
"github.com/docker/docker/registry"
"github.com/docker/docker/runconfig"
tagpkg "github.com/docker/docker/tag"
)
func (cli *DockerCli) pullImage(image string) error {
return cli.pullImageCustomOut(image, cli.out)
}
func (cli *DockerCli) pullImageCustomOut(image string, out io.Writer) error {
ref, err := reference.ParseNamed(image)
if err != nil {
return err
}
var tag string
switch x := ref.(type) {
case reference.Digested:
tag = x.Digest().String()
case reference.Tagged:
tag = x.Tag()
default:
// pull only the image tagged 'latest' if no tag was specified
tag = tagpkg.DefaultTag
}
// Resolve the Repository name from fqn to RepositoryInfo
repoInfo, err := registry.ParseRepositoryInfo(ref)
if err != nil {
return err
}
// Resolve the Auth config relevant for this server
authConfig := registry.ResolveAuthConfig(cli.configFile, repoInfo.Index)
buf, err := json.Marshal(authConfig)
if err != nil {
return err
}
options := lib.CreateImageOptions{
Parent: ref.Name(),
Tag: tag,
RegistryAuth: base64.URLEncoding.EncodeToString(buf),
}
responseBody, err := cli.client.CreateImage(options)
if err != nil {
return err
}
defer responseBody.Close()
return jsonmessage.DisplayJSONMessagesStream(responseBody, out, cli.outFd, cli.isTerminalOut)
}
type cidFile struct {
path string
file *os.File
written bool
}
func newCIDFile(path string) (*cidFile, error) {
if _, err := os.Stat(path); err == nil {
return nil, fmt.Errorf("Container ID file found, make sure the other container isn't running or delete %s", path)
}
f, err := os.Create(path)
if err != nil {
return nil, fmt.Errorf("Failed to create the container ID file: %s", err)
}
return &cidFile{path: path, file: f}, nil
}
func (cli *DockerCli) createContainer(config *runconfig.Config, hostConfig *runconfig.HostConfig, cidfile, name string) (*types.ContainerCreateResponse, error) {
mergedConfig := runconfig.MergeConfigs(config, hostConfig)
var containerIDFile *cidFile
if cidfile != "" {
var err error
if containerIDFile, err = newCIDFile(cidfile); err != nil {
return nil, err
}
defer containerIDFile.Close()
}
ref, err := reference.ParseNamed(config.Image)
if err != nil {
return nil, err
}
isDigested := false
switch ref.(type) {
case reference.Tagged:
case reference.Digested:
isDigested = true
default:
ref, err = reference.WithTag(ref, tagpkg.DefaultTag)
if err != nil {
return nil, err
}
}
var trustedRef reference.Canonical
if isTrusted() && !isDigested {
var err error
trustedRef, err = cli.trustedReference(ref.(reference.NamedTagged))
if err != nil {
return nil, err
}
config.Image = trustedRef.String()
}
//create the container
response, err := cli.client.ContainerCreate(mergedConfig, name)
//if image not found try to pull it
if err != nil {
if lib.IsErrImageNotFound(err) {
fmt.Fprintf(cli.err, "Unable to find image '%s' locally\n", ref.String())
// we don't want to write to stdout anything apart from container.ID
if err = cli.pullImageCustomOut(config.Image, cli.err); err != nil {
return nil, err
}
if trustedRef != nil && !isDigested {
if err := cli.tagTrusted(trustedRef, ref.(reference.NamedTagged)); err != nil {
return nil, err
}
}
// Retry
var retryErr error
response, retryErr = cli.client.ContainerCreate(mergedConfig, name)
if retryErr != nil {
return nil, retryErr
}
} else {
return nil, err
}
}
for _, warning := range response.Warnings {
fmt.Fprintf(cli.err, "WARNING: %s\n", warning)
}
if containerIDFile != nil {
if err = containerIDFile.Write(response.ID); err != nil {
return nil, err
}
}
return &response, nil
}
// CmdCreate creates a new container from a given image.
//
// Usage: docker create [OPTIONS] IMAGE [COMMAND] [ARG...]
func (cli *DockerCli) CmdCreate(args ...string) error {
cmd := Cli.Subcmd("create", []string{"IMAGE [COMMAND] [ARG...]"}, Cli.DockerCommands["create"].Description, true)
addTrustedFlags(cmd, true)
// These are flags not stored in Config/HostConfig
var (
flName = cmd.String([]string{"-name"}, "", "Assign a name to the container")
)
config, hostConfig, cmd, err := runconfig.Parse(cmd, args)
if err != nil {
cmd.ReportError(err.Error(), true)
os.Exit(1)
}
if config.Image == "" {
cmd.Usage()
return nil
}
response, err := cli.createContainer(config, hostConfig, hostConfig.ContainerIDFile, *flName)
if err != nil {
return err
}
fmt.Fprintf(cli.out, "%s\n", response.ID)
return nil
}