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Created attachment 1421026 [details]
log from docker-systemd failure

# docker run -t registry.access.redhat.com/rhel7/rhel:latest /usr/sbin/init
    systemd 219 running in system mode. (+PAM +AUDIT +SELINUX +IMA -APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL 
+XZ -LZ4 -SECCOMP +BLKID +ELFUTILS +KMOD +IDN)
    ...
    [  OK  ] Reached target Encrypted Volumes.
    Failed to create cgroup /system.slice/docker-<sha>.scope/system.slice/systemd-journald.service: Permission denied
    ....

Lots and lots of these. See attachment for full log.

RPMs of note:

   kernel-3.10.0-862.el7.x86_64
   docker-1.13.1-58.git87f2fab.el7.x86_64
   container-selinux-2.55-1.el7.noarch
   selinux-policy-3.13.1-192.el7_5.3.noarch

This is RHEL 7.4 with latest updates; I haven't seen it fail on RHEL 7.5 (!)

Under the previous 7.4 kernel (kernel-3.10.0-693.el7.x86_64), before rebooting, the error was quicker:

    Set hostname to <7381be6f2c57>.
    Initializing machine ID from random generator.
    Failed to create root cgroup hierarchy: Permission denied
    Failed to allocate manager object: Permission denied
    [!!!!!!] Failed to allocate manager object, freezing.






AFAICT RHEL 7.4 only, not 7.5

Is the container_manage_cgroup boolean turned on?

setsebool -P container_manage_cgroup 1

Sigh, that was it. Sorry for the noise.