Symbolic links seem to be missing in converted images

Dear all,

it seems that symbolic links are missing in the converted images.

For example the latest matterminers/wlcg-wn:latest container does not have it, while it is present in the underlying docker container.

ls -l /cvmfs/unpacked.cern.ch/registry.hub.docker.com/matterminers/wlcg-wn\:latest/
insgesamt 7
drwxr-xr-x  2 scc-sdm-hep-0001 hk-project-test-hep  6 12. Sep 04:38 cvmfs
drwxr-xr-x  2 scc-sdm-hep-0001 hk-project-test-hep  6 12. Sep 05:06 dev
lrwxrwxrwx  1 scc-sdm-hep-0001 hk-project-test-hep 36 12. Sep 05:06 environment -> .singularity.d/env/90-environment.sh
drwxr-xr-x 60 scc-sdm-hep-0001 hk-project-test-hep 38 12. Sep 05:06 etc
drwxr-xr-x  2 scc-sdm-hep-0001 hk-project-test-hep  6 12. Sep 05:06 home
drwxr-xr-x  3 scc-sdm-hep-0001 hk-project-test-hep 19 12. Sep 05:03 opt
drwxr-xr-x  2 scc-sdm-hep-0001 hk-project-test-hep  6 12. Sep 05:06 proc
drwxr-x---  3 scc-sdm-hep-0001 hk-project-test-hep 18 12. Sep 05:02 root
drwxr-xr-x  5 scc-sdm-hep-0001 hk-project-test-hep 50 12. Sep 05:03 run
lrwxrwxrwx  1 scc-sdm-hep-0001 hk-project-test-hep 24 12. Sep 05:06 singularity -> .singularity.d/runscript
drwxr-xr-x  2 scc-sdm-hep-0001 hk-project-test-hep  6 12. Sep 05:06 sys
drwxrwxrwx  3 scc-sdm-hep-0001 hk-project-test-hep 29 12. Sep 05:03 tmp
drwxr-xr-x 10 scc-sdm-hep-0001 hk-project-test-hep 19 12. Sep 05:06 usr
drwxr-xr-x  9 scc-sdm-hep-0001 hk-project-test-hep 17 12. Sep 05:04 var

The matterminers/wlcg-wn:testing from April still have it.

ls -l /cvmfs/unpacked.cern.ch/registry.hub.docker.com/matterminers/wlcg-wn\:testing/
insgesamt 23
-rw-r--r--  1 scc-sdm-hep-0001 hk-project-test-hep 12114 13. Nov 2020  anaconda-post.log
lrwxrwxrwx  1 scc-sdm-hep-0001 hk-project-test-hep     7 27. Feb 2021  bin -> usr/bin
drwxr-xr-x  2 scc-sdm-hep-0001 hk-project-test-hep     6  4. Apr 02:31 cvmfs
drwxr-xr-x  2 scc-sdm-hep-0001 hk-project-test-hep     6 13. Nov 2020  dev
lrwxrwxrwx  1 scc-sdm-hep-0001 hk-project-test-hep    36  4. Apr 02:49 environment -> .singularity.d/env/90-environment.sh
drwxr-xr-x 80 scc-sdm-hep-0001 hk-project-test-hep    38  4. Apr 02:49 etc
drwxr-xr-x  2 scc-sdm-hep-0001 hk-project-test-hep     6 11. Apr 2018  home
lrwxrwxrwx  1 scc-sdm-hep-0001 hk-project-test-hep     7 27. Feb 2021  lib -> usr/lib
lrwxrwxrwx  1 scc-sdm-hep-0001 hk-project-test-hep     9 27. Feb 2021  lib64 -> usr/lib64
drwxr-xr-x  2 scc-sdm-hep-0001 hk-project-test-hep     6 11. Apr 2018  media
drwxr-xr-x  2 scc-sdm-hep-0001 hk-project-test-hep     6 11. Apr 2018  mnt
drwxr-xr-x  3 scc-sdm-hep-0001 hk-project-test-hep    19  4. Apr 02:46 opt
drwxr-xr-x  2 scc-sdm-hep-0001 hk-project-test-hep     6 13. Nov 2020  proc
drwxr-x---  3 scc-sdm-hep-0001 hk-project-test-hep    18  4. Apr 02:45 root
drwxr-xr-x 14 scc-sdm-hep-0001 hk-project-test-hep    50  4. Apr 02:46 run
lrwxrwxrwx  1 scc-sdm-hep-0001 hk-project-test-hep     8 27. Feb 2021  sbin -> usr/sbin
lrwxrwxrwx  1 scc-sdm-hep-0001 hk-project-test-hep    24  4. Apr 02:49 singularity -> .singularity.d/runscript
drwxr-xr-x  2 scc-sdm-hep-0001 hk-project-test-hep     6 11. Apr 2018  srv
drwxr-xr-x  2 scc-sdm-hep-0001 hk-project-test-hep     6 13. Nov 2020  sys
drwxrwxrwx  8 scc-sdm-hep-0001 hk-project-test-hep    29  4. Apr 02:46 tmp
drwxr-xr-x 13 scc-sdm-hep-0001 hk-project-test-hep    19  4. Apr 02:49 usr
drwxr-xr-x 19 scc-sdm-hep-0001 hk-project-test-hep    17  4. Apr 02:46 var

From our monitoring it seems that it occurred the first time between September, 7th and 8th.

Thanks and best regards, Manuel