Hello Aswad,
Recent versions of Fedora provide Moby Engine instead of Docker (I can't recall which version made the switch), but that package provides the `docker` executable now.
$ sudo dnf provides $(which docker)
...
moby-engine-20.10.20-1.fc37.x86_64 : The open-source application container engine
Repo : updates
Matched from:
Filename : /usr/bin/docker
$ rpm -q moby-engine
moby-engine-20.10.20-1.fc37.x86_64
That said, I can see that new files get the right label:
$ docker run --security-opt label=level:s0:c100,c200 -i -t fedora bash
Unable to find image 'fedora:latest' locally
latest: Pulling from library/fedora
e437052d4f94: Pull complete
Digest: sha256:d2c7dadebf6d8eb44ae87955cd02e1bc89fa6f9afb7452467a5524a8c72c208e
Status: Downloaded newer image for fedora:latest
[root@e8c7aed274ee /]# exit
exit
$ sudo ls -lrtZ /var/lib/docker/containers/e8c7aed274eec207959d26fa5b617ebc7b830fa4e49cddfe5d686c2fcdb9b14c
total 24
drwx------. 1 root root system_u:object_r:container_var_lib_t:s0 0 Nov 15 21:39 checkpoints
-rw-r--r--. 1 root root system_u:object_r:container_var_lib_t:s0 71 Nov 15 21:39 resolv.conf.hash
-rw-r--r--. 1 root root system_u:object_r:container_file_t:s0:c100,c200 853 Nov 15 21:39 resolv.conf
-rw-r--r--. 1 root root system_u:object_r:container_file_t:s0:c100,c200 174 Nov 15 21:39 hosts
drwx--x---. 1 root root system_u:object_r:container_var_lib_t:s0 0 Nov 15 21:39 mounts
-rw-r--r--. 1 root root system_u:object_r:container_file_t:s0:c100,c200 13 Nov 15 21:39 hostname
-rw-r--r--. 1 root root system_u:object_r:container_var_lib_t:s0 1497 Nov 15 21:39 hostconfig.json
-rw-------. 1 root root system_u:object_r:container_var_lib_t:s0 2489 Nov 15 21:39 config.v2.json
and so do volumes:
$ docker run --security-opt label=level:s0:c100,c200 -i -t -v /mnt fedora bash
[root@911a3dbaf2f0 /]# exit
exit
$ docker volume ls
DRIVER VOLUME NAME
local 1540d47a79e2443cd0398f9da1b09cd7120647f1f200b55718d945a899d6b845
$ sudo ls -lrtZ /var/lib/docker/volumes/1540d47a79e2443cd0398f9da1b09cd7120647f1f200b55718d945a899d6b845
total 0
drwxr-xr-x. 1 root root system_u:object_r:container_file_t:s0:c100,c200 0 Aug 9 15:57 _data
Can you paste an example of what you see?
In any case, most probably the problem does not exist in current versions.
Hope that helps.