The following packages cannot be authenticated! percona-*

We are seeing this in our CI builds with Kitchen and EC2

$ sudo apt-get -q install percona-server-client-5.6=5.6.44-86.0-1.xenial
Reading package lists…
Building dependency tree…
Reading state information…
The following additional packages will be installed:
libdbi-perl libperconaserverclient18.1 percona-server-common-5.6
Suggested packages:
libclone-perl libmldbm-perl libnet-daemon-perl libsql-statement-perl
The following NEW packages will be installed:
libdbi-perl libperconaserverclient18.1 percona-server-client-5.6 percona-server-common-5.6
0 upgraded, 4 newly installed, 0 to remove and 22 not upgraded.
Need to get 2,691 kB of archives.
After this operation, 43.9 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
WARNING: The following packages cannot be authenticated!
percona-server-common-5.6 libperconaserverclient18.1 percona-server-client-5.6

because…

$ sudo apt-get update
Hit:1 http://us-west-2.ec2.archive.ubuntu.com/ubuntu xenial InRelease
Hit:2 http://us-west-2.ec2.archive.ubuntu.com/ubuntu xenial-updates InRelease
Hit:3 http://us-west-2.ec2.archive.ubuntu.com/ubuntu xenial-backports InRelease
Get:4 http://repo.percona.com/apt xenial InRelease [15.9 kB]
Hit:5 http://security.ubuntu.com/ubuntu xenial-security InRelease
Ign:4 http://repo.percona.com/apt xenial InRelease
Fetched 15.9 kB in 0s (41.0 kB/s)
Reading package lists… Done
W: GPG error: http://repo.percona.com/apt xenial InRelease: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY 9334A25F8507EFA5
W: The repository ‘http://repo.percona.com/apt xenial InRelease’ 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.

The key seems to have been installed as usual and nothing changed in our pipeline config.

Hello there

You need to install the latest version of our packages, these contain our keys

https://repo.percona.com/apt/percona-release_1.0-11.generic_all.deb

Hope this helps, if you have further issues don’t hesitate to come back and ask…

What happen??