I'm having this same issue on 4.4.8 with a fresh 3-node install as well.
Same errors as the OP.
Potentially relevant test command:
[root@ovirt-node0 ~]# semanage fcontext -a -t glusterd_brick_t
"/gluster_bricks(/.*)?"
ValueError: Type glusterd_brick_t is invalid, must be a file or device type
Seems like the glusterd selinux fcontexts are missing. Are they provided by
glusterd_selinux?
[root@ovirt-node0 ~]# dnf install selinux-policy
Last metadata expiration check: 0:03:51 ago on Wed 15 Sep 2021 11:31:59 AM UTC.
Package selinux-policy-3.14.3-79.el8.noarch is already installed.