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munin install for client

set up according to:

http://cluestick/wiki/Munin#Munin

on client (using jabserver2p.fsf.org as an example):

apt-get install munin-node

vim /etc/munin/munin-node.conf
+host_name jabserver2p.fsf.org
+#bernie/sudoman: office NAT gateway for monitor.office.fsf.org
+allow ^74\.94\.156\.210$

cd /etc/munin/plugins
rm -f threads if_err_eth0 fw_packets swap users exim_* entropy open_files open_inodes

vim /etc/munin/plugin-conf.d/munin-node
+[diskstats]
+user root
+env.graph_width 640

service munin-node restart

on monitor.office.fsf.org:

nc jabserver2p.fsf.org 4949
^D

vim /etc/munin/munin-conf.d/domU_jabserver2p.fsf.org.conf
[domU;jabserver2p.fsf.org]
        address jabserver2p.fsf.org

custom graphs

ssh'd into the target machine, in a script like: /etc/munin/plugins/foo_bar with permissions 750 and ownership root:munin if it contains a password:

#! /bin/bash

function config() {
        cat <<'EOM'
graph_title CiviCRM Contact Count
graph_vlabel contacts
civicrm_contacts.label CiviCRM contacts
EOM
        exit 0
}

# don't use the leading backslash for the source code version of this line. it's just for ikiwiki formatting
[[ $1 == "config" ]] && config

count="$(echo "select count(*) from civicrm_contact;" | mysql -u munin -pFOO civicrm | tail -n +2)"

echo "civicrm_contacts.value ${count}"

Give the munin user select access on the id column of the table you're accessing:

...
GRANT SELECT (id) ON civicrm_contact TO munin@localhost;
...

Start using the new script:

systemctl restart munin-node.service
systemctl status munin-node.service

vim /var/log/munin/munin-node.log

Script

There is a script in /home/common that can download all of the graphs with day, week, month, and year views.

/home/common/sysadmin/munin-year.sh

This is helpful for getting a wider view or sharing data with an external community admin.