Limit size of copied files

[hongbin]

Zun supports copying files to/from a container. In CLI, this is achieved via the "zun cp" command. In REST API, this is supported via the "/v1/containers/{container_ident}/get_archive" and "/v1/containers/{container_ident}/put_archive" endpoints.

We need to have a config option (like 'copied_file_content_bytes' https://github.com/openstack/nova/blob/stable/queens/nova/conf/quota.py#L146) to limit the size of the file that is being copied for various reasons, such as QoS and security.

For example, if the limit is "4K", copying file larger than 4K will be rejected.

[Vince Mulhollon (vincemulhollon)]

I would like to request that if this is ever implemented, the default be extremely large?

I am trying to copy compiled microcontroller firmware images on the order of 200K, in and out of containers, so 4K would be a little low.

I'm aware there are better ways to move files under normal conditions, however, to assist with troubleshooting activities ...