====================
v4.6.4 Release Notes
====================

v4.6.4 is a regularly-scheduled minor release in the v4.6.x series.

Significant changes are described below. Additional changes are listed in the
`CHANGELOG`_.

.. _CHANGELOG: https://github.com/warewulf/warewulf/blob/main/CHANGELOG.md

EL10 and dnsmasq support
========================

To support the ongoing development and upcoming release of OpenHPC 4, Warewulf
v4.6.4 adds initial support and automatic CI/CD builds for EL10. EL10 does not
include the ISC DHCP server, so EL10 packages depend on and use dnsmasq by
default.

Warewulf v4 has included some support for dnsmasq since v4.4.0, but its
use by default in EL10 will bring additional visibility. For now, this includes:

- A fix for a bug that prevented proper handling of iPXE files when using
  dnsmasq.

wwclient
========

v4.6.4 makes a number of enhancements to ``wwclient``, the daemon that
periodically re-applies the runtime overlay to cluster nodes.

- ``wwclient`` now places files from the runtime overlay atomically, such that
  any application concurrently reading an updated file will only ever see the
  complete previous or updated content.
- ``wwclient`` now skips updating files that do not appear to have been
  modified, as judged by file size and modification time.
- ``wwclient --once`` prompts wwclient to run once, which is useful both for
  testing and for dispatching updates more dynamically (e.g., between compute
  jobs).
- ``wwclient --debug`` now generates more and more useful debug output.

wwctl configure warewulfd
=========================

v4.6.4 adds the ability to enable and (re)start the warewulf server daemon
itself to apply updated configuration, either as part of ``wwctl configure -a``
or ``wwctl configure warewulfd``. This only takes effect if a ``systemd name``
for Warewulf is specified in ``warewulf.conf``.

.. code-block:: yaml

   warewulf:
     systemd name: warewulfd

New installations will include ``systemd name: warewulfd`` by default.

Network configuration fixes
===========================

- The NetworkManager overlay now omits the ``[ethernet]`` section for
  non-ethernet interfaces.
- The NetworkManager overlay now sets ``ipv4:method=disabled`` if no address or
  route is specified.
- The ifcfg overlay now sets ``SLAVE=yes`` when ``MASTER`` is set. #1980

Other fixes
===========

- Prevent brp-mangle-shebangs from changing files in overlays. (e.g.,
  ``/bin/sh`` to ``/usr/bin/sh``)
- Updated golang BuildRequires in the RPM specfile to 1.22.
- Fixed unsetting boolean options with ``wwctl``.