munin df plugin configuration

Question

Every time LVM snapshot is dropped, I receive Munin warnings:

Disk latency per device :: Average latency for /dev/vg/lv_mysql_snapshot
UNKNOWNs: Read IO Wait time is unknown, Write IO Wait time is unknown.

Disk latency per device :: Average latency for /dev/mapper/vg-lv_mysql-real
UNKNOWNs: Read IO Wait time is unknown, Write IO Wait time is unknown.

Disk latency per device :: Average latency for /dev/mapper/vg-lv_mysql_snapshot-cow
UNKNOWNs: Read IO Wait time is unknown, Write IO Wait time is unknown.

Is it any way to ignore the LVM partition notifications in munin? Thanks.

Answer 1

In your case a quick:

  [diskstats]
    env.exclude lv

should be enough. This should go in /etc/munin/munin.conf below the configuration of this host.