Bug#1074359: nfs-kernel-server: Updating package unexports all filesystems

[Hristo Venev <hristo@venev.name>]

Package: nfs-kernel-server
Version: 1:2.6.4-5
Severity: important
X-Debbugs-Cc: hristo@venev.name

Dear Maintainer,

When updating nfs-kernel-server, /var/lib/nfs/etab is wiped, which
results in all exports being removed until the NFS server is restarted.

This is a major issue when `policy-rc.d` prohibits restarts, as in that
case the restart does not happen automatically. It is also an issue when
the policy permits restarts, as there still exists a time window during
which all exported fileystems are missing.


-- System Information:
Debian Release: trixie/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 6.7.12-amd64 (SMP w/96 CPU threads; PREEMPT)
Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages nfs-kernel-server depends on:
ii  keyutils                1.6.3-3
ii  libblkid1               2.40.1-9
ii  libc6                   2.38-13
ii  libcap2                 1:2.66-5
ii  libevent-core-2.1-7t64  2.1.12-stable-10
ii  libsqlite3-0            3.46.0-1
ii  libtirpc3t64            1.3.4+ds-1.3
ii  libuuid1                2.40.1-9
ii  libwrap0                7.6.q-33
ii  libxml2                 2.9.14+dfsg-1.3+b3
ii  netbase                 6.4
ii  nfs-common              1:2.6.4-5
ii  ucf                     3.0043+nmu1

Versions of packages nfs-kernel-server recommends:
ii  python3       3.11.8-1
ii  python3-yaml  6.0.1-2

Versions of packages nfs-kernel-server suggests:
ii  procps  2:4.0.4-4

-- no debconf information