Description of problem:

In the RHV-M appliance image, the /tmp/ is not getting mounted during booting.

===
[root@localhost ~]# systemctl status tmp.mount
● tmp.mount
   Loaded: masked (/dev/null; bad)
   Active: inactive (dead)
Warning: tmp.mount changed on disk. Run 'systemctl daemon-reload' to reload units.


[root@localhost ~]# mount|grep -i tmp
devtmpfs on /dev type devtmpfs (rw,nosuid,seclabel,size=450188k,nr_inodes=112547,mode=755)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev,seclabel)
tmpfs on /run type tmpfs (rw,nosuid,nodev,seclabel,mode=755)
tmpfs on /sys/fs/cgroup type tmpfs (ro,nosuid,nodev,noexec,seclabel,mode=755)
tmpfs on /run/user/0 type tmpfs (rw,nosuid,nodev,relatime,seclabel,size=94732k,mode=700)

[root@localhost ~]# grep tmp /etc/fstab 
/dev/mapper/ovirt-tmp   /tmp                    xfs     nodev,noexec,nosuid 0 0
===

I can manually mount it using "mount -a" command. 

If I unmask and reboot the server, it mounts without any issues.

===
systemctl status tmp.mount
● tmp.mount - /tmp
   Loaded: loaded (/etc/fstab; disabled; vendor preset: disabled)
   Active: active (mounted) since Fri 2018-12-14 06:42:07 EST; 34min ago
    Where: /tmp
     What: /dev/mapper/ovirt-tmp
     Docs: man:fstab(5)
           man:systemd-fstab-generator(8)
  Process: 594 ExecMount=/bin/mount /dev/mapper/ovirt-tmp /tmp -t xfs -o nodev,noexec,nosuid (code=exited, status=0/SUCCESS)

Dec 14 06:42:06 localhost systemd[1]: tmp.mount: Directory /tmp to mount over is not empty, mounting anyway.
Dec 14 06:42:06 localhost systemd[1]: Mounting /tmp...
Dec 14 06:42:07 localhost systemd[1]: Mounted /tmp.

mount|grep -i ovirt-tmp
/dev/mapper/ovirt-tmp on /tmp type xfs (rw,nosuid,nodev,noexec,relatime,seclabel,attr2,inode64,noquota)

I can see similar discussion about AMI images here https://bugzilla.redhat.com/show_bug.cgi?id=1408572#c10 where the solution was to unmask the tmp.mount.

Version-Release number of selected component (if applicable):

Tested with rhvm-appliance-4.2-20180828.0.el7.ova

How reproducible:

100%

Steps to Reproduce:

Boot the OVA rhvm appliance and check if /tmp is getting mounted.

Actual results:

/tmp is not getting mounted during boot.

Expected results:

/tmp should get mounted.

Additional info:

I am not sure if this is a bug with systemd or "tmp.umount" should be always unamsked for the /tmp/ to get mounted even if it's defined in fstab.