Volumes refactor and external plugin implementation.

Signed by all authors:

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
Signed-off-by: Arnaud Porterie <arnaud.porterie@docker.com>
Signed-off-by: David Calavera <david.calavera@gmail.com>
Signed-off-by: Jeff Lindsay <progrium@gmail.com>
Signed-off-by: Alexander Morozov <lk4d4@docker.com>
Signed-off-by: Luke Marsden <luke@clusterhq.com>
Signed-off-by: David Calavera <david.calavera@gmail.com>

api/client/cli.go

@@ -6,19 +6,18 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"net"
 	"net/http"
 	"os"
 	"path/filepath"
 	"reflect"
 	"strings"
 	"text/template"
-	"time"
 
 	"github.com/docker/docker/cliconfig"
 	"github.com/docker/docker/pkg/homedir"
 	flag "github.com/docker/docker/pkg/mflag"
 	"github.com/docker/docker/pkg/term"
+	"github.com/docker/docker/utils"
 )
 
 // DockerCli represents the docker command line client.
@@ -178,19 +177,7 @@ func NewDockerCli(in io.ReadCloser, out, err io.Writer, keyFile string, proto, a
 	tr := &http.Transport{
 		TLSClientConfig: tlsConfig,
 	}
-
-	// Why 32? See https://github.com/docker/docker/pull/8035.
-	timeout := 32 * time.Second
-	if proto == "unix" {
-		// No need for compression in local communications.
-		tr.DisableCompression = true
-		tr.Dial = func(_, _ string) (net.Conn, error) {
-			return net.DialTimeout(proto, addr, timeout)
-		}
-	} else {
-		tr.Proxy = http.ProxyFromEnvironment
-		tr.Dial = (&net.Dialer{Timeout: timeout}).Dial
-	}
+	utils.ConfigureTCPTransport(tr, proto, addr)
 
 	configFile, e := cliconfig.Load(filepath.Join(homedir.Get(), ".docker"))
 	if e != nil {