Docker Engine v25 (not yet natively packaged as docker.io, I know - but docker-
ce from their repo has it) deprecates legacy API versions:
https://docs.docker.com/engine/deprecated/#deprecate-legacy-api-versions

This affects libnss-docker, because it has API version 1.21 (set at configure
time).

A workaround until Docker Engine v26 would be to set
DOCKER_MIN_API_VERSION=1.21 for the Docker Daemon, but after that, a minimum of
1.24 is required.

Raising the severity of this issue to RC because docker.io version 27,
that does not implement the old APIs required by libnss-docker, is now
in unstable and will soon migrate to testing, breaking this package.

Hi,

in upstream issue

https://github.com/dex4er/nss-docker/issues/15

a fork

https://github.com/petski/nss-docker-ng

was announced.  Please either consider packaging this for or lets remove
the non-functional package.

If there is no response to this bug in the next 31 days I will ask for
removal of this package.

Kind regards
    Andreas.

Dear submitter,

as the package libnss-docker has just been removed from the Debian archive
unstable we hereby close the associated bug reports.  We are sorry
that we couldn't deal with your issue properly.

For details on the removal, please see https://bugs.debian.org/1124925

The version of this package that was in Debian prior to this removal
can still be found using https://snapshot.debian.org/.

Please note that the changes have been done on the master archive and
will not propagate to any mirrors until the next dinstall run at the
earliest.

This message was generated automatically; if you believe that there is
a problem with it please contact the archive administrators by mailing
ftpmaster@ftp-master.debian.org.

Debian distribution maintenance software
pp.
Thorsten Alteholz (the ftpmaster behind the curtain)