userDataBase64 property

Can be used instead of userData to pass base64-encoded binary data directly. Use this instead of userData whenever the value is not a valid UTF-8 string. For example, gzip-encoded user data must be base64-encoded and passed via this argument to avoid corruption. Updates to this field will trigger a stop/start of the EC2 instance by default. If the userDataReplaceOnChange is set then updates to this field will trigger a destroy and recreate of the EC2 instance.