privilege enabled docker container (#3475)

Issue #2724

builder/docker/config.go

@@ -31,6 +31,7 @@ type Config struct {
 	Pull       bool
 	RunCommand []string `mapstructure:"run_command"`
 	Volumes    map[string]string
+	Privileged bool `mapstructure:"privileged"`
 
 	// This is used to login to dockerhub to pull a private base container. For
 	// pushing to dockerhub, see the docker post-processors

builder/docker/driver.go

@@ -64,6 +64,7 @@ type ContainerConfig struct {
 	Image      string
 	RunCommand []string
 	Volumes    map[string]string
+	Privileged bool
 }
 
 // This is the template that is used for the RunCommand in the ContainerConfig.

builder/docker/driver_docker.go

@@ -210,6 +210,9 @@ func (d *DockerDriver) StartContainer(config *ContainerConfig) (string, error) {
 
 	// Args that we're going to pass to Docker
 	args := []string{"run"}
+	if config.Privileged {
+		args = append(args, "--privileged")
+	}
 	for host, guest := range config.Volumes {
 		args = append(args, "-v", fmt.Sprintf("%s:%s", host, guest))
 	}

builder/docker/step_run.go

@@ -20,6 +20,7 @@ func (s *StepRun) Run(state multistep.StateBag) multistep.StepAction {
 		Image:      config.Image,
 		RunCommand: config.RunCommand,
 		Volumes:    make(map[string]string),
+		Privileged: config.Privileged,
 	}
 
 	for host, container := range config.Volumes {