Allow Proxy Configuration in config.json

This commit modifies config.json to allow for any proxies allowed in
build-args to be configured. These values will then be used
by default as build-args in docker build.

Signed-off-by: Dave Tucker <dt@docker.com>

cli/command/container/run.go

@@ -13,6 +13,7 @@ import (
 	"github.com/Sirupsen/logrus"
 	"github.com/docker/cli/cli"
 	"github.com/docker/cli/cli/command"
+	"github.com/docker/cli/opts"
 	"github.com/docker/docker/api/types"
 	"github.com/docker/docker/api/types/container"
 	"github.com/docker/docker/pkg/promise"
@@ -96,14 +97,24 @@ func isLocalhost(ip string) bool {
 	return localhostIPRegexp.MatchString(ip)
 }
 
-func runRun(dockerCli *command.DockerCli, flags *pflag.FlagSet, opts *runOptions, copts *containerOptions) error {
+func runRun(dockerCli *command.DockerCli, flags *pflag.FlagSet, ropts *runOptions, 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)
 	// just in case the parse does not exit
 	if err != nil {
 		reportError(dockerCli.Err(), "run", err.Error(), true)
 		return cli.StatusError{StatusCode: 125}
 	}
-	return runContainer(dockerCli, opts, copts, containerConfig)
+	return runContainer(dockerCli, ropts, copts, containerConfig)
 }
 
 // nolint: gocyclo
@@ -159,6 +170,7 @@ func runContainer(dockerCli *command.DockerCli, opts *runOptions, copts *contain
 		sigc := ForwardAllSignals(ctx, dockerCli, createResponse.ID)
 		defer signal.StopCatch(sigc)
 	}
+
 	var (
 		waitDisplayID chan struct{}
 		errCh         chan error

cli/command/image/build.go

@@ -290,7 +290,7 @@ func runBuild(dockerCli *command.DockerCli, options buildOptions) error {
 		Dockerfile:     relDockerfile,
 		ShmSize:        options.shmSize.Value(),
 		Ulimits:        options.ulimits.GetList(),
-		BuildArgs:      opts.ConvertKVStringsToMapWithNil(options.buildArgs.GetAll()),
+		BuildArgs:      dockerCli.ConfigFile().ParseProxyConfig(dockerCli.Client().DaemonHost(), options.buildArgs.GetAll()),
 		AuthConfigs:    authConfigs,
 		Labels:         opts.ConvertKVStringsToMap(options.labels.GetAll()),
 		CacheFrom:      options.cacheFrom,

cli/config/configfile/file.go

@@ -9,6 +9,7 @@ import (
 	"path/filepath"
 	"strings"
 
+	"github.com/docker/cli/opts"
 	"github.com/docker/docker/api/types"
 	"github.com/pkg/errors"
 )
@@ -41,6 +42,15 @@ type ConfigFile struct {
 	ConfigFormat         string                      `json:"configFormat,omitempty"`
 	NodesFormat          string                      `json:"nodesFormat,omitempty"`
 	PruneFilters         []string                    `json:"pruneFilters,omitempty"`
+	Proxies              map[string]ProxyConfig      `json:"proxies,omitempty"`
+}
+
+// ProxyConfig contains proxy configuration settings
+type ProxyConfig struct {
+	HTTPProxy  string `json:"httpProxy,omitempty"`
+	HTTPSProxy string `json:"httpsProxy,omitempty"`
+	NoProxy    string `json:"noProxy,omitempty"`
+	FTPProxy   string `json:"ftpProxy,omitempty"`
 }
 
 // LegacyLoadFromReader reads the non-nested configuration data given and sets up the
@@ -152,6 +162,39 @@ func (configFile *ConfigFile) Save() error {
 	return configFile.SaveToWriter(f)
 }
 
+// ParseProxyConfig computes proxy configuration by retreiving the config for the provided host and
+// then checking this against any environment variables provided to the container
+func (configFile *ConfigFile) ParseProxyConfig(host string, runOpts []string) map[string]*string {
+	var cfgKey string
+
+	if _, ok := configFile.Proxies[host]; !ok {
+		cfgKey = "default"
+	} else {
+		cfgKey = host
+	}
+
+	config, _ := configFile.Proxies[cfgKey]
+	permitted := map[string]*string{
+		"HTTP_PROXY":  &config.HTTPProxy,
+		"HTTPS_PROXY": &config.HTTPSProxy,
+		"NO_PROXY":    &config.NoProxy,
+		"FTP_PROXY":   &config.FTPProxy,
+	}
+	m := opts.ConvertKVStringsToMapWithNil(runOpts)
+	for k := range permitted {
+		if *permitted[k] == "" {
+			continue
+		}
+		if _, ok := m[k]; !ok {
+			m[k] = permitted[k]
+		}
+		if _, ok := m[strings.ToLower(k)]; !ok {
+			m[strings.ToLower(k)] = permitted[k]
+		}
+	}
+	return m
+}
+
 // encodeAuth creates a base64 encoded string to containing authorization information
 func encodeAuth(authConfig *types.AuthConfig) string {
 	if authConfig.Username == "" && authConfig.Password == "" {

cli/config/configfile/file_test.go

@@ -1,9 +1,11 @@
 package configfile
 
 import (
+	"fmt"
 	"testing"
 
 	"github.com/docker/docker/api/types"
+	"github.com/stretchr/testify/assert"
 )
 
 func TestEncodeAuth(t *testing.T) {
@@ -25,3 +27,118 @@ func TestEncodeAuth(t *testing.T) {
 		t.Fatal("AuthString encoding isn't correct.")
 	}
 }
+
+func TestProxyConfig(t *testing.T) {
+	httpProxy := "http://proxy.mycorp.com:3128"
+	httpsProxy := "https://user:password@proxy.mycorp.com:3129"
+	ftpProxy := "http://ftpproxy.mycorp.com:21"
+	noProxy := "*.intra.mycorp.com"
+	defaultProxyConfig := ProxyConfig{
+		HTTPProxy:  httpProxy,
+		HTTPSProxy: httpsProxy,
+		FTPProxy:   ftpProxy,
+		NoProxy:    noProxy,
+	}
+
+	cfg := ConfigFile{
+		Proxies: map[string]ProxyConfig{
+			"default": defaultProxyConfig,
+		},
+	}
+
+	proxyConfig := cfg.ParseProxyConfig("/var/run/docker.sock", []string{})
+	expected := map[string]*string{
+		"HTTP_PROXY":  &httpProxy,
+		"http_proxy":  &httpProxy,
+		"HTTPS_PROXY": &httpsProxy,
+		"https_proxy": &httpsProxy,
+		"FTP_PROXY":   &ftpProxy,
+		"ftp_proxy":   &ftpProxy,
+		"NO_PROXY":    &noProxy,
+		"no_proxy":    &noProxy,
+	}
+	assert.Equal(t, expected, proxyConfig)
+}
+
+func TestProxyConfigOverride(t *testing.T) {
+	httpProxy := "http://proxy.mycorp.com:3128"
+	overrideHTTPProxy := "http://proxy.example.com:3128"
+	overrideNoProxy := ""
+	httpsProxy := "https://user:password@proxy.mycorp.com:3129"
+	ftpProxy := "http://ftpproxy.mycorp.com:21"
+	noProxy := "*.intra.mycorp.com"
+	defaultProxyConfig := ProxyConfig{
+		HTTPProxy:  httpProxy,
+		HTTPSProxy: httpsProxy,
+		FTPProxy:   ftpProxy,
+		NoProxy:    noProxy,
+	}
+
+	cfg := ConfigFile{
+		Proxies: map[string]ProxyConfig{
+			"default": defaultProxyConfig,
+		},
+	}
+
+	ropts := []string{
+		fmt.Sprintf("HTTP_PROXY=%s", overrideHTTPProxy),
+		"NO_PROXY=",
+	}
+	proxyConfig := cfg.ParseProxyConfig("/var/run/docker.sock", ropts)
+	expected := map[string]*string{
+		"HTTP_PROXY":  &overrideHTTPProxy,
+		"http_proxy":  &httpProxy,
+		"HTTPS_PROXY": &httpsProxy,
+		"https_proxy": &httpsProxy,
+		"FTP_PROXY":   &ftpProxy,
+		"ftp_proxy":   &ftpProxy,
+		"NO_PROXY":    &overrideNoProxy,
+		"no_proxy":    &noProxy,
+	}
+	assert.Equal(t, expected, proxyConfig)
+}
+
+func TestProxyConfigPerHost(t *testing.T) {
+	httpProxy := "http://proxy.mycorp.com:3128"
+	httpsProxy := "https://user:password@proxy.mycorp.com:3129"
+	ftpProxy := "http://ftpproxy.mycorp.com:21"
+	noProxy := "*.intra.mycorp.com"
+
+	extHTTPProxy := "http://proxy.example.com:3128"
+	extHTTPSProxy := "https://user:password@proxy.example.com:3129"
+	extFTPProxy := "http://ftpproxy.example.com:21"
+	extNoProxy := "*.intra.example.com"
+
+	defaultProxyConfig := ProxyConfig{
+		HTTPProxy:  httpProxy,
+		HTTPSProxy: httpsProxy,
+		FTPProxy:   ftpProxy,
+		NoProxy:    noProxy,
+	}
+	externalProxyConfig := ProxyConfig{
+		HTTPProxy:  extHTTPProxy,
+		HTTPSProxy: extHTTPSProxy,
+		FTPProxy:   extFTPProxy,
+		NoProxy:    extNoProxy,
+	}
+
+	cfg := ConfigFile{
+		Proxies: map[string]ProxyConfig{
+			"default":                       defaultProxyConfig,
+			"tcp://example.docker.com:2376": externalProxyConfig,
+		},
+	}
+
+	proxyConfig := cfg.ParseProxyConfig("tcp://example.docker.com:2376", []string{})
+	expected := map[string]*string{
+		"HTTP_PROXY":  &extHTTPProxy,
+		"http_proxy":  &extHTTPProxy,
+		"HTTPS_PROXY": &extHTTPSProxy,
+		"https_proxy": &extHTTPSProxy,
+		"FTP_PROXY":   &extFTPProxy,
+		"ftp_proxy":   &extFTPProxy,
+		"NO_PROXY":    &extNoProxy,
+		"no_proxy":    &extNoProxy,
+	}
+	assert.Equal(t, expected, proxyConfig)
+}