Comment 12 for bug 1901698

This is still an issue - freezer_scheduler container is restarting incessantly and the logs are flooded with:
```
2021-08-03 03:49:53.247 11 CRITICAL freezer-scheduler [-] Unhandled error: OSError: [Errno 88] Socket operation on non-socket
2021-08-03 03:49:53.247 11 ERROR freezer-scheduler Traceback (most recent call last):
2021-08-03 03:49:53.247 11 ERROR freezer-scheduler File "/var/lib/kolla/venv/bin/freezer-scheduler", line 8, in <module>
2021-08-03 03:49:53.247 11 ERROR freezer-scheduler sys.exit(main())
2021-08-03 03:49:53.247 11 ERROR freezer-scheduler File "/var/lib/kolla/venv/lib/python3.8/site-packages/freezer/scheduler/freezer_scheduler.py", line 255, in main
2021-08-03 03:49:53.247 11 ERROR freezer-scheduler daemon.start()
2021-08-03 03:49:53.247 11 ERROR freezer-scheduler File "/var/lib/kolla/venv/lib/python3.8/site-packages/freezer/scheduler/daemon.py", line 178, in start
2021-08-03 03:49:53.247 11 ERROR freezer-scheduler with DaemonContext(pidfile=pidfile, signal_map=self.signal_map,
2021-08-03 03:49:53.247 11 ERROR freezer-scheduler File "/var/lib/kolla/venv/lib/python3.8/site-packages/freezer/lib/pep3143daemon/daemon.py", line 132, in __init__
2021-08-03 03:49:53.247 11 ERROR freezer-scheduler self.detach_process = detach_required()
2021-08-03 03:49:53.247 11 ERROR freezer-scheduler File "/var/lib/kolla/venv/lib/python3.8/site-packages/freezer/lib/pep3143daemon/daemon.py", line 416, in detach_required
2021-08-03 03:49:53.247 11 ERROR freezer-scheduler if parent_is_inet() or parent_is_init():
2021-08-03 03:49:53.247 11 ERROR freezer-scheduler File "/var/lib/kolla/venv/lib/python3.8/site-packages/freezer/lib/pep3143daemon/daemon.py", line 394, in parent_is_inet
2021-08-03 03:49:53.247 11 ERROR freezer-scheduler sock = socket.fromfd(
2021-08-03 03:49:53.247 11 ERROR freezer-scheduler File "/usr/lib/python3.8/socket.py", line 544, in fromfd
2021-08-03 03:49:53.247 11 ERROR freezer-scheduler return socket(family, type, proto, nfd)
2021-08-03 03:49:53.247 11 ERROR freezer-scheduler File "/usr/lib/python3.8/socket.py", line 231, in __init__
2021-08-03 03:49:53.247 11 ERROR freezer-scheduler _socket.socket.__init__(self, family, type, proto, fileno)
2021-08-03 03:49:53.247 11 ERROR freezer-scheduler OSError: [Errno 88] Socket operation on non-socket
2021-08-03 03:49:53.247 11 ERROR freezer-scheduler

```
while syslog is full of
```
level=error msg="copy shim log" error="read /proc/self/fd/439: file already closed"
```
from `containerd`