`upsmon` is the component of [NUT] that monitors (local or remote) UPS
devices and reacts to changes in their state. Notably, it is
responsible for powering down the system when there is insufficient
power to the system.
The *sensors* plugin for collectd reads temperature information from the
I²C/SMBus using *lm_sensors*. Naturally, it is only useful on physical
machines, so it is not installed or enabled by default.
The groups in `hosts.offline` need to match those in `hosts`.
Specifically, the *collectd* group needs to be a child of the
*collectd-prometheus* group so that the *write_prometheus* plugin is
installed and configured on hosts defined in this inventory file.
Using *systemd-networkd* to configure network interfaces on *vmhost0* is
working really well. It is decidedly more stable than *dhcpcd* was, and
certainly easier to work with than NetworkManager. Let's go ahead and
switch *vmhost1* as well.
*vmhost0.pyrocufflink.blue* no longer uses `dhcpcd` for network
configuration, but *systemd-networkd*.
The host-specific network settings for a VM host include the
configuration for the management interface, as well as the configuration
of the physical ports that make up the bonded interfaces.
*systemd-networkd* is (currently) my preferred way to manage network
interfaces on machines running Fedora. The *systemd-networkd* role
provides a generic way to configure network links, devices, and
interfaces, using Ansible variables to generate network unit
configuration files.
I doubt I will be using Koji much if at all any more. In preparation
for decommissioning it, I am moving the Koji inventory to hosts.offline,
to prevent Jenkins jobs from failing.
*vmhost0.pyrocufflink.blue* is currently offline for maintenance. To
avoid the unending stream of failed continuous enforcement Jenkins jobs,
it has been removed from the main inventory file and moved to "offline"
inventory.
Because *vmhost1.pyrocufflink.blue* is usually sleeping, continuous
enforcement jobs always fail. By keeping it in a separate inventory
file, configuration policy can still be applied to it manually, but it
will be ignored by continuous enforcement.
