Fix exec driver flag, rename new driver to 'native'

Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)

docker/docker.go

@@ -39,7 +39,7 @@ func main() {
 		flDefaultIp          = flag.String([]string{"#ip", "-ip"}, "0.0.0.0", "Default IP address to use when binding container ports")
 		flInterContainerComm = flag.Bool([]string{"#icc", "-icc"}, true, "Enable inter-container communication")
 		flGraphDriver        = flag.String([]string{"s", "-storage-driver"}, "", "Force the docker runtime to use a specific storage driver")
-		flExecDriver         = flag.String([]string{"e", "-exec-driver"}, "", "Force the docker runtime to use a specific exec driver")
+		flExecDriver         = flag.String([]string{"e", "-exec-driver"}, "native", "Force the docker runtime to use a specific exec driver")
 		flHosts              = opts.NewListOpts(api.ValidateHost)
 		flMtu                = flag.Int([]string{"#mtu", "-mtu"}, 0, "Set the containers network MTU; if no value is provided: default to the default route MTU or 1500 if no default route is available")
 	)

execdriver/native/default_template.go

@@ -1,4 +1,4 @@
-package docker
+package native
 
 import (
 	"github.com/dotcloud/docker/pkg/cgroups"

execdriver/native/driver.go

@@ -1,4 +1,4 @@
-package docker
+package native
 
 import (
 	"encoding/json"

execdriver/native/term.go

@@ -1,4 +1,4 @@
-package docker
+package native
 
 import (
 	"github.com/dotcloud/docker/execdriver"

runtime.go

@@ -7,8 +7,8 @@ import (
 	"github.com/dotcloud/docker/dockerversion"
 	"github.com/dotcloud/docker/engine"
 	"github.com/dotcloud/docker/execdriver"
-	"github.com/dotcloud/docker/execdriver/docker"
 	"github.com/dotcloud/docker/execdriver/lxc"
+	"github.com/dotcloud/docker/execdriver/native"
 	"github.com/dotcloud/docker/graphdriver"
 	"github.com/dotcloud/docker/graphdriver/aufs"
 	_ "github.com/dotcloud/docker/graphdriver/btrfs"
@@ -702,17 +702,18 @@ func NewRuntimeFromDirectory(config *DaemonConfig, eng *engine.Engine) (*Runtime
 		sysInitPath = localCopy
 	}
 
-	sysInfo := sysinfo.New(false)
+	var (
+		ed      execdriver.Driver
+		sysInfo = sysinfo.New(false)
+	)
 
-	var ed execdriver.Driver
-	utils.Debugf("execDriver: provided %s", config.ExecDriver)
-	if config.ExecDriver == "chroot" && false {
-		// chroot is presently a noop driver https://github.com/dotcloud/docker/pull/4189#issuecomment-35330655
-		ed, err = chroot.NewDriver()
-		utils.Debugf("execDriver: using chroot")
-	} else {
+	switch config.ExecDriver {
+	case "lxc":
 		ed, err = lxc.NewDriver(config.Root, sysInfo.AppArmor)
-		utils.Debugf("execDriver: using lxc")
+	case "native":
+		ed, err = native.NewDriver(config.Root)
+	default:
+		return nil, fmt.Errorf("unknow exec driver %s", config.ExecDriver)
 	}
 	if err != nil {
 		return nil, err

sysinit/sysinit.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"github.com/dotcloud/docker/execdriver"
 	_ "github.com/dotcloud/docker/execdriver/lxc"
+	_ "github.com/dotcloud/docker/execdriver/native"
 	"io"
 	"io/ioutil"
 	"log"