Nvidia-docker エラーがでた

Nvidia-docker エラーがでた

エラー

apt update を実行したら以下のエラーが出た。

W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://nvidia.github.io/libnvidia-container/ubuntu18.04/amd64  InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 6ED91CA3AC1160CD
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://nvidia.github.io/nvidia-container-runtime/ubuntu18.04/amd64  InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 6ED91CA3AC1160CD
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://nvidia.github.io/nvidia-docker/ubuntu18.04/amd64  InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 6ED91CA3AC1160CD
W: Failed to fetch https://nvidia.github.io/libnvidia-container/ubuntu18.04/amd64/InRelease  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 6ED91CA3AC1160CD
W: Failed to fetch https://nvidia.github.io/nvidia-container-runtime/ubuntu18.04/amd64/InRelease  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 6ED91CA3AC1160CD
W: Failed to fetch https://nvidia.github.io/nvidia-docker/ubuntu18.04/amd64/InRelease  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 6ED91CA3AC1160CD
W: Some index files failed to download. They have been ignored, or old ones used instead.

対策

gpgkeyの更新で解決できた。

curl -s -L https://nvidia.github.io/nvidia-docker/gpgkey | \
  sudo apt-key add -

以上。