coreos-cloudinit: bump to 0.8.4

coreos-cloudinit: apply environment to userdata string

coreos-cloudinit.go

@@ -14,7 +14,7 @@ import (
 )
 
 const (
-	version               = "0.8.3"
+	version               = "0.8.4"
 	datasourceInterval    = 100 * time.Millisecond
 	datasourceMaxInterval = 30 * time.Second
 	datasourceTimeout     = 5 * time.Minute
@@ -112,7 +112,9 @@ func main() {
 		}
 	}
 
+	// Apply environment to user-data
 	env := initialize.NewEnvironment("/", ds.ConfigRoot(), workspace, convertNetconf, sshKeyName, subs)
+	userdata := env.Apply(string(userdataBytes))
 
 	var ccm, ccu *initialize.CloudConfig
 	var script *system.Script
@@ -120,7 +122,7 @@ func main() {
 		fmt.Printf("Failed to parse meta-data: %v\n", err)
 		die()
 	}
-	if ud, err := initialize.ParseUserData(string(userdataBytes)); err != nil {
+	if ud, err := initialize.ParseUserData(userdata); err != nil {
 		fmt.Printf("Failed to parse user-data: %v\n", err)
 		die()
 	} else {