Dear colleagues, please, compare CRun and runc implementation. CRun lacks some dependencies like seccomp,etc. Most RedHat UBI, ... images were cut from the distro together with systemd2, logind, resourced, oomd, ... Running bash in the systems with user's sessions managed by systemd2 requires 1. Communication with systemd on the host to  put the container cgroup into the right place. 2. Starting the user's session inside the container.  You can see it clearly if you pull/from/unshare/mount ubi or fedora image using buildah.