"public key is not available" for cuDNN APT repo in ubuntu 14.04 images

[grisaitis]

I get the following error if I run apt-get update in one of the ubuntu 14.04-based images that includes cudnn:

W: GPG error: http://developer.download.nvidia.com  Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY F60F4B3D7FA2AF80

My Dockerfile looks like this:

FROM nvidia/cuda:7.5-cudnn5-devel-ubuntu14.04
RUN apt-get update

and I can get the same result if I replace nvidia/cuda:7.5-cudnn5-devel-ubuntu14.04 with cudnn4.

This error does not occur when I build from one of the ubuntu 16.04 Dockerfiles, e.g., nvidia/cuda:8.0-cudnn5-devel-ubuntu16.04. I believe the reason it works there is that cudnn isn't being installed from APT, but rather some tarball that's downloaded from nvidia.

[grisaitis]

I'm able to fix the issue by adding this before I run apt-get update:

RUN apt-key adv --fetch-keys http://developer.download.nvidia.com/compute/machine-learning/repos/ubuntu1404/x86_64/7fa2af80.pub

I'll submit a pull request shortly with this change implemented.

[grisaitis]

Fixed the issue!

The error was caused by stale base images on my local docker host.

Re-pulling the images solved the problem, either with docker build --pull ... or for i in $(docker images --format "{{.Repository}}:{{.Tag}}" | grep nvidia/cuda); do docker pull $i; done.

[grisaitis]

To clarify: this was user error. No pull request / code changes warranted.

[flx42]

No problem, sorry for breaking the public CUDA repo, the transition has been rough for everyone!

[jacknlliu]

I got the same error with Ubuntu 16.04. How to get the public key for ubuntu 16.04? @flx42

[flx42]

You already asked on GitLab, and this issue has been fixed a long time ago, so you're facing a diffent issue.