Since upgrading munin-node today, the hddtemp_smartctl doesn't graph any new
values.

/var/log/munin/munin-node.log is filled with these errors:

2021/11/02-21:40:33 [22215] Error output from hddtemp_smartctl:
2021/11/02-21:40:33 [22215]     [ERROR] Command /usr/sbin/smartctl -A
--nocheck=standby /dev/sda on drive sda failed with exit(2): Smartctl open
device: /dev/sda failed: No such device at /etc/munin/plugins/hddtemp_smartctl
line 274.
2021/11/02-21:40:33 [22215]     [ERROR] Command /usr/sbin/smartctl -A
--nocheck=standby /dev/sdb on drive sdb failed with exit(2): Smartctl open
device: /dev/sdb failed: No such device at /etc/munin/plugins/hddtemp_smartctl
line 274.
2021/11/02-21:40:33 [22215]     [ERROR] Command /usr/sbin/smartctl -A
--nocheck=standby /dev/sdc on drive sdc failed with exit(2): Smartctl open
device: /dev/sdc failed: No such device at /etc/munin/plugins/hddtemp_smartctl
line 274.
2021/11/02-21:40:33 [22215]     [ERROR] Command /usr/sbin/smartctl -A
--nocheck=standby /dev/sdd on drive sdd failed with exit(2): Smartctl open
device: /dev/sdd failed: No such device at /etc/munin/plugins/hddtemp_smartctl
line 274.
2021/11/02-21:40:33 [22215]     [ERROR] Command /usr/sbin/smartctl -A
--nocheck=standby /dev/sde on drive sde failed with exit(2): Smartctl open
device: /dev/sde failed: No such device at /etc/munin/plugins/hddtemp_smartctl
line 274.

It was working before. The config is

[hddtemp_smartctl]
user root

It works with munin-run:

> sudo munin-run hddtemp_smartctl
sda.value 40
sdb.value 37
sdc.value 36
sdd.value 35
sde.value 29

> rpm -qi munin-node
Name        : munin-node
Version     : 2.0.66
Release     : lp152.71.1
Architecture: noarch
Install Date: Di 02 Nov 2021 18:35:52 CET
Group       : System/Monitoring
Size        : 1508608
License     : GPL-2.0-only
Signature   : DSA/SHA1, Di 02 Nov 2021 14:31:03 CET, Key ID a5c23697ee454f98
Source RPM  : munin-2.0.66-lp152.71.1.src.rpm
Build Date  : Di 02 Nov 2021 14:30:42 CET
Build Host  : old-atreju5
Relocations : (not relocatable)
Vendor      : obs://build.opensuse.org/server:monitoring
URL         : http://munin-monitoring.org/
Summary     : Network-wide graphing framework (node)
Description :
Munin is a highly flexible and powerful solution used to create graphs of
virtually everything imaginable throughout your network, while still
maintaining a rattling ease of installation and configuration.

This package contains node software. You should install it on all the nodes
in your network. It will know how to extract all sorts of data from the
node it runs on, and will wait for the gatherer to request this data for
further processing.

It includes a range of plugins capable of extracting common values such as
cpu usage, network usage, load average, and so on. Creating your own plugins
which are capable of extracting other system-specific values is very easy,
and is often done in a matter of minutes. You can also create plugins which
relay information from other devices in your network that can't run Munin,
such as a switch or a server running another operating system, by using
SNMP or similar technology.

Munin is written in Perl, and relies heavily on Tobi Oetiker's excellent
RRDtool. To see a real example of Munin in action, take a peek at
<http://www.linpro.no/projects/munin/example/>.
Distribution: server:monitoring / openSUSE_Leap_15.2