Ubuntu Trusty is no longer available in Cloud VPS since Nov 2017 for new instances. The migration path is to replace such instances with Debian Stretch (or possibly Jessie), no new Ubuntu versions are supported for Wikimedia use. Around April 2019 Ubuntu Trusty support will be removed, and with it any accidental support for other versions of Ubuntu such as Xenial or Bionic.
The following VM has been detected as having been in-place-upgraded to an unsupported Ubuntu version instead of being replaced with Debian:
Listed administrators are:
More info in openstack browser: https://tools.wmflabs.org/openstack-browser/project/globaleducation