We have the same problem New deploy with LVL2 CIS breaks the /var/log/ folder. 

-- Unit rabbitmq-server.service has begun starting up.
Apr 07 14:56:14 landscapeamqp-1 rabbitmq[17114]: /usr/sbin/rabbitmq-server: 33: /usr/sbin/rabbitmq-server: cannot create /var/log/rabbitmq/startup_log: Permission denied
Apr 07 14:56:14 landscapeamqp-1 audit[1]: SERVICE_START pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=rabbitmq-server comm="systemd" exe="/lib/systemd/systemd" hostname=? addr=? terminal=? res=failed'
Apr 07 14:56:14 landscapeamqp-1 systemd[1]: rabbitmq-server.service: Main process exited, code=exited, status=2/INVALIDARGUMENT

root@landscapeamqp-1:/var/log# df -h
Filesystem      Size  Used Avail Use% Mounted on
udev            1.9G     0  1.9G   0% /dev
tmpfs           394M  656K  393M   1% /run
/dev/vda2        37G  6.5G   29G  19% /
tmpfs           2.0G     0  2.0G   0% /dev/shm
tmpfs           5.0M     0  5.0M   0% /run/lock
tmpfs           2.0G     0  2.0G   0% /sys/fs/cgroup
tmpfs           100K     0  100K   0% /var/lib/lxd/shmounts
tmpfs           100K     0  100K   0% /var/lib/lxd/devlxd
tmpfs           394M     0  394M   0% /run/user/1000

root@landscapeamqp-1:/var/log# ls -lash
total 1.2M
4.0K drwxr-x---  13 root      syslog          4.0K Apr  7 14:38 .
4.0K drwxr-xr-x  13 root      root            4.0K Mar 25 16:06 ..
4.0K drwxr-x---   2 root      root            4.0K Jan 17 12:03 aide
4.0K -rw-r-----   1 root      root            3.8K Apr  7 14:38 alternatives.log
4.0K drwxr-x---   2 root      root            4.0K Sep 27  2018 apparmor
4.0K drwxr-x---   2 root      root            4.0K Apr  7 15:00 apt
4.0K drwxr-x---   2 root      adm             4.0K Apr  7 14:37 audit
8.0K -rw-r-----   1 syslog    adm             6.8K Apr  7 14:54 auth.log
   0 -rw-r-----   1 root      utmp               0 Mar 25 16:06 btmp
216K -rw-r-----   1 syslog    adm             216K Apr  7 14:37 cloud-init.log
160K -rw-r-----   1 root      adm             155K Apr  7 14:37 cloud-init-output.log
4.0K drwxr-x---   2 root      root            4.0K Sep  3  2021 dist-upgrade
164K -rw-r-----   1 root      root            158K Apr  7 15:00 dpkg.log
4.0K drwxr-s---+  3 root      systemd-journal 4.0K Apr  7 14:32 journal
4.0K drwxr-xr-x   2 syslog    adm             4.0K Apr  7 14:37 juju
 56K -rw-r-----   1 syslog    adm              56K Apr  7 14:37 kern.log
4.0K drwxr-x---   2 landscape landscape       4.0K Apr  7 14:54 landscape
 12K -rw-r-----   1 root      utmp            286K Apr  7 14:54 lastlog
4.0K drwxr-x---   2 root      root            4.0K Apr  7 14:37 lxd
4.0K -rw-r-----   1 syslog    adm              595 Apr  7 14:37 mail.log
4.0K drwxr-xr-x   2 rabbitmq  rabbitmq        4.0K Jun 23  2021 rabbitmq
480K -rw-r-----   1 syslog    adm             480K Apr  7 15:00 syslog
8.0K -rw-------   1 root      root             63K Apr  7 14:38 tallylog
   0 -rw-r-----   1 root      root               0 Apr  7 14:32 ubuntu-advantage.log
4.0K drwxr-x---   2 root      adm             4.0K Apr  7 14:32 unattended-upgrades
4.0K -rw-r-----   1 root      utmp            2.7K Apr  7 14:54 wtmp
root@landscapeamqp-1:/var/log# cd rabbitmq/
root@landscapeamqp-1:/var/log/rabbitmq# ls -las
total 8
4 drwxr-xr-x  2 rabbitmq rabbitmq 4096 Jun 23  2021 .
4 drwxr-x--- 13 root     syslog   4096 Apr  7 14:38 ..