1.31 is the latest docker available for CentOS 7 from centos repos. I added the docker-ce repo, removed docker and reinstalled the latest docker-ce. That solved the problem. Thanks for you help!

Docker version 1.13.1, build 7d71120/1.13.1

running on

CentOS Linux release 7.9.2009 (Core)

Thanks, but no and no

irisowner@2f54ebfbc52f:~$ iris session IRIS 



irisowner@2f54ebfbc52f:~$ iris terminal IRIS