On Tue, Jan 13, 2026 at 05:38:50PM +0000, job@openbsd.org wrote:
> 
> Hi all,
> 
> TL;DR - here is a proposed replacement for the 'iostat_' munin plugin,
> this replacement is called 'iostat'.
> 
> Background: I tried to use the iostat_ script Olivier provided, but I
> ran into some issues: it seems inconvenient the script doesn't just
> automatically detect & graph all disks, I think I hit a bug trying to
> get the script to work on a system with multiple disks, and I didn't
> fully comprehend the script's comment about 'iostat_aggregated'.
> 
> I rewrote the script in order to correctly use Munin's multigraph
> functionality and I added automatic disk device detection. To use this
> plugin, simply link or copy the below shell script into
> /etc/munin/plugins/iostat and restart the munin_node process.
> 
> Example: https://nyc1.digitalocean.rpkiviews.org/munin/localhost/localhost/index.html#disk
> If you click the 'Disk throughput per device' or 'Disk IOs per device'
> graphs it'll bring you to another page where you'll separate graphs for
> the individual disk devices.
> 
> There is more work to be done here, for example, graphing device
> utilisation as a percentage - however, this would require tracking
> state, so such work might better be done as part of a future full
> rewrite to perl.
> 
> Kind regards,
> 
> Job

Hello Job,

I tested it on a machine with 2 disks and it worked well.
Sure it is handy to have all disk stats on the same graph.
We can definitively inlude it into net/munin port.

BTW, I've never had issue with the current iostat_ script. But it
requires to list the devices you want to monitor.

Thanks,
Best.

-- 
Olivier Cherrier
Phone: +352691570680
mailto:oc@symacx.com