Installing Grafana extension on Plesk server with Ubuntu 24.04 fails: The following signatures were invalid: 8BADC1A02FC9C07FB8C20EC0BD11A6AA914BDF7E (untrusted public key algorithm: dsa1024)

Symptoms

• On a Plesk server with Ubuntu 24.04 OS, installing Grafana extension fails:
  
• On Plesk servers with other Ubuntu/Debian versions, checking for package updates may fail:

  CONFIG_TEXT: Err:11 https://autoinstall.plesk.com/grafana/deb stable InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY E9299045CE550E57
  .....
  W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://autoinstall.plesk.com/grafana/deb stable InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY E9299045CE550E57
  W: Failed to fetch https://autoinstall.plesk.com/grafana/deb/dists/stable/InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY E9299045CE550E57
  W: Some index files failed to download. They have been ignored, or old ones used instead.

Cause

Grafana extension repository was signed with GPG key with weak algorithm. 

Resolution

GPG key of the Grafana repository was updated, so the issue should be resolved.

If the issue still occurs, connect to the server via SSH and execute the following command to update the key:

# wget -q -O - https://autoinstall.plesk.com/grafana/deb/gpg.key | gpg --dearmor > /etc/apt/keyrings/plesk-ext-grafana.gpg