added functionality for specifying a source director

userdata.tpl

@@ -8,7 +8,7 @@ mount -t nfs4 -o nfsvers=4.1,rsize=1048576,wsize=1048576,hard,timeo=600,retrans=
 cd /
 mkdir efs_backup
 cd efs_backup
-tar -zcvf ${backup_archive_name} /efs
+tar -zcvf ${backup_archive_name} ${source_directory}
 
 # unmount efs
 umount /efs

variables.tf

@@ -64,3 +64,8 @@ variable "key_name" {
   description = "An optional SSH key pair to launch the backup instance with"
   default     = ""
 }
+
+variable "source_directory" {
+  description = "An optional specific source directory in the EFS mount of backup"
+  default "/efs"
+}