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Munin : Set Thresholds
2015/06/11 |
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The monitoring target items are set as plugins and thresholds are defined in some plugins by default,
but if you'd like to add more thresholds to a plugin, configure like follows.
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| [1] | It's possible to confirm plugins like follows. |
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# current enabled plugins are located under the directory below [root@dlp ~]# ls /etc/munin/plugins cpu fw_packets ntp_kernel_pll_freq processes df if_err_eth0 ntp_kernel_pll_off proc_pri df_inode if_eth0 ntp_offset swap diskstats interrupts ntp_states threads entropy irqstats open_files uptime forks load open_inodes users fw_conntrack memory postfix_mailqueue vmstat fw_forwarded_local ntp_kernel_err postfix_mailvolume # installed plugins are located under the directory below [root@dlp ~]# ls /usr/share/munin/plugins acpi nvidia_ amavis open_files apache_accesses open_inodes apache_processes openvpn apache_volume perdition ..... ..... |
| [2] | It's possible to display current values for each plugin. |
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# display values for cpu plugin [root@dlp ~]# munin-run cpu user.value 4262 nice.value 680 system.value 1933 idle.value 1069496 iowait.value 1891 irq.value 0 softirq.value 52 steal.value 208 guest.value 0 # display values for df plugin [root@dlp ~]# munin-run df _dev_mapper_centos_root.value 4.34168354184342 _dev_vda1.value 25.3611960958576 |
| [3] | Set threshold's value in munin.conf like follows. ⇒ [plugin name].[field name].[warning | critical] min-value:max-value The field name is just the one which is displayed when executing "munin-run" command. The min-value or max-value can be omitted. |
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[root@dlp ~]#
vi /etc/munin/munin.conf # set threshold on target node [dlp.srv.world] address 127.0.0.1 use_node_name yes # set 80% of warning and 90% of critical for user field in cpu plugin cpu.user.warning :80 cpu.user.critical :90 # set 80% of warning and 90% of critical for root partition field in df plugin df._dev_mapper_VolGroup_lv_root.warning :80 df._dev_mapper_VolGroup_lv_root.critical :90 |
| [4] | If you configured notification setting and a value is over from the threshold's value, the email is sent like follows. |
From munin@dlp.srv.world Fri Jun 12 14:35:07 2015
Return-Path: <munin@dlp.srv.world>
X-Original-To: root
Delivered-To: root@dlp.srv.world
Date: Fri, 12 Jun 2015 14:35:07 +0900
To: root@dlp.srv.world
Subject: Munin-notification for srv.world::dlp.srv.world
User-Agent: Heirloom mailx 12.5 7/5/10
Content-Type: text/plain; charset=us-ascii
From: munin@dlp.srv.world (Munin user)
Status: R
srv.world :: dlp.srv.world :: CPU usage
CRITICALs: user is 100.38 (outside range [:80]).
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