builder/digitalocean: user data support [GH-2113]

builder/digitalocean/config.go

@@ -26,6 +26,7 @@ type Config struct {
 	PrivateNetworking bool   `mapstructure:"private_networking"`
 	SnapshotName      string `mapstructure:"snapshot_name"`
 	DropletName       string `mapstructure:"droplet_name"`
+	UserData          string `mapstructure:"user_data"`
 	SSHUsername       string `mapstructure:"ssh_username"`
 	SSHPort           uint   `mapstructure:"ssh_port"`
 

builder/digitalocean/step_create_droplet.go

@@ -31,6 +31,7 @@ func (s *stepCreateDroplet) Run(state multistep.StateBag) multistep.StepAction {
 			godo.DropletCreateSSHKey{ID: int(sshKeyId)},
 		},
 		PrivateNetworking: c.PrivateNetworking,
+		UserData:          c.UserData,
 	})
 	if err != nil {
 		err := fmt.Errorf("Error creating droplet: %s", err)

website/source/docs/builders/digitalocean.html.markdown

@@ -67,6 +67,8 @@ each category, the available configuration keys are alphabetized.
   for a droplet to enter a desired state (such as "active") before
   timing out. The default state timeout is "6m".
 
+* `user_data` (string) - User data to launch with the Droplet.
+
 ## Basic Example
 
 Here is a basic example. It is completely valid as soon as you enter your