The repository ' stretch Release' is not signed


Running into these exceptions in our ci/cd this morning for several times:

Reading package lists… Done

W: GPG error: stretch Release: The following signatures were invalid: EXPKEYSIG 6AA009B4485ADD60 Lightbend
W: The repository ‘ stretch Release’ is not signed.
N: Data from such a repository can’t be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.

  • sudo apt-get install -y reactive-cli=1.6.0

This has been fixed now.