[kolla-ansible] Is it possible to know software version in docker image ?

Hello, I am using kolla-ansible to set up my openstack. I'm desperately trying to get Vpnaas to work with Victoria or Wallaby, using CentOS. But a version of the LibreSwan software prevents proper operation. Is it possible to know the version of a software used in a docker image ? I should not use version 4.X but rather version 3.3. I did a test with ussuri, it was version 4.3 so Vpnaas does not work with ussuri and Centos. Thanks in advance Franck