Fix: proxy-configuration being ignored on docker create

Proxies configured in config.json were only taking effect
when using `docker run`, but were being ignored when
using `docker create`.

Before this change:

    echo '{"proxies":{"default":{"httpProxy":"httpProxy","httpsProxy":"httpsProxy","noProxy":"noProxy","ftpProxy":"ftpProxy"}}}' > config.json
    docker inspect --format '{{.Config.Env}}' $(docker --config=./ create busybox)
    [PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin]

With this change applied:

    echo '{"proxies":{"default":{"httpProxy":"httpProxy","httpsProxy":"httpsProxy","noProxy":"noProxy","ftpProxy":"ftpProxy"}}}' > config.json
    docker inspect --format '{{.Config.Env}}' $(docker --config=./ create busybox)
    [NO_PROXY=noProxy no_proxy=noProxy FTP_PROXY=ftpProxy ftp_proxy=ftpProxy HTTP_PROXY=httpProxy http_proxy=httpProxy HTTPS_PROXY=httpsProxy https_proxy=httpsProxy PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin]

Reported-by: Silvano Cirujano Cuesta <Silvanoc@users.noreply.github.com>
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

cli/command/container/create.go

@@ -10,6 +10,7 @@ import (
 	"github.com/docker/cli/cli"
 	"github.com/docker/cli/cli/command"
 	"github.com/docker/cli/cli/command/image"
+	"github.com/docker/cli/opts"
 	"github.com/docker/distribution/reference"
 	"github.com/docker/docker/api/types"
 	"github.com/docker/docker/api/types/container"
@@ -60,7 +61,17 @@ func NewCreateCommand(dockerCli command.Cli) *cobra.Command {
 	return cmd
 }
 
-func runCreate(dockerCli command.Cli, flags *pflag.FlagSet, opts *createOptions, copts *containerOptions) error {
+func runCreate(dockerCli command.Cli, flags *pflag.FlagSet, options *createOptions, copts *containerOptions) error {
+	proxyConfig := dockerCli.ConfigFile().ParseProxyConfig(dockerCli.Client().DaemonHost(), copts.env.GetAll())
+	newEnv := []string{}
+	for k, v := range proxyConfig {
+		if v == nil {
+			newEnv = append(newEnv, k)
+		} else {
+			newEnv = append(newEnv, fmt.Sprintf("%s=%s", k, *v))
+		}
+	}
+	copts.env = *opts.NewListOptsRef(&newEnv, nil)
 	containerConfig, err := parse(flags, copts)
 	if err != nil {
 		reportError(dockerCli.Err(), "create", err.Error(), true)
@@ -70,7 +81,7 @@ func runCreate(dockerCli command.Cli, flags *pflag.FlagSet, opts *createOptions,
 		reportError(dockerCli.Err(), "create", err.Error(), true)
 		return cli.StatusError{StatusCode: 125}
 	}
-	response, err := createContainer(context.Background(), dockerCli, containerConfig, opts)
+	response, err := createContainer(context.Background(), dockerCli, containerConfig, options)
 	if err != nil {
 		return err
 	}

cli/command/container/create_test.go

@@ -7,9 +7,11 @@ import (
 	"io/ioutil"
 	"os"
 	"runtime"
+	"sort"
 	"strings"
 	"testing"
 
+	"github.com/docker/cli/cli/config/configfile"
 	"github.com/docker/cli/internal/test"
 	"github.com/docker/cli/internal/test/notary"
 	"github.com/docker/docker/api/types"
@@ -231,6 +233,47 @@ func TestNewCreateCommandWithWarnings(t *testing.T) {
 	}
 }
 
+func TestCreateContainerWithProxyConfig(t *testing.T) {
+	expected := []string{
+		"HTTP_PROXY=httpProxy",
+		"http_proxy=httpProxy",
+		"HTTPS_PROXY=httpsProxy",
+		"https_proxy=httpsProxy",
+		"NO_PROXY=noProxy",
+		"no_proxy=noProxy",
+		"FTP_PROXY=ftpProxy",
+		"ftp_proxy=ftpProxy",
+	}
+	sort.Strings(expected)
+
+	cli := test.NewFakeCli(&fakeClient{
+		createContainerFunc: func(config *container.Config,
+			hostConfig *container.HostConfig,
+			networkingConfig *network.NetworkingConfig,
+			containerName string,
+		) (container.ContainerCreateCreatedBody, error) {
+			sort.Strings(config.Env)
+			assert.DeepEqual(t, config.Env, expected)
+			return container.ContainerCreateCreatedBody{}, nil
+		},
+	})
+	cli.SetConfigFile(&configfile.ConfigFile{
+		Proxies: map[string]configfile.ProxyConfig{
+			"default": {
+				HTTPProxy:  "httpProxy",
+				HTTPSProxy: "httpsProxy",
+				NoProxy:    "noProxy",
+				FTPProxy:   "ftpProxy",
+			},
+		},
+	})
+	cmd := NewCreateCommand(cli)
+	cmd.SetOutput(ioutil.Discard)
+	cmd.SetArgs([]string{"image:tag"})
+	err := cmd.Execute()
+	assert.NilError(t, err)
+}
+
 type fakeNotFound struct{}
 
 func (f fakeNotFound) NotFound() bool { return true }