mailinabox/setup/munin.sh

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#!/bin/bash
# Munin: resource monitoring tool
#################################################
source setup/functions.sh # load our functions
source /etc/mailinabox.conf # load global vars
# install Munin
echo "Installing Munin (system monitoring)..."
apt_install munin munin-node
# edit config
cat > /etc/munin/munin.conf <<EOF;
dbdir /var/lib/munin
htmldir /var/cache/munin/www
logdir /var/log/munin
rundir /var/run/munin
tmpldir /etc/munin/templates
includedir /etc/munin/munin-conf.d
# a simple host tree
[$PRIMARY_HOSTNAME]
address 127.0.0.1
# send alerts to the following address
contacts admin
contact.admin.command mail -s "Munin notification ${var:host}" administrator@$PRIMARY_HOSTNAME
contact.admin.always_send warning critical
EOF
# ensure munin-node knows the name of this machine
tools/editconf.py /etc/munin/munin-node.conf -s \
host_name=$PRIMARY_HOSTNAME
# Update the activated plugins through munin's autoconfiguration.
munin-node-configure --shell --remove-also 2>/dev/null | sh
# Deactivate monitoring of NTP peers. Not sure why anyone would want to monitor a NTP peer. The addresses seem to change
# (which is taken care of my munin-node-configure, but only when we re-run it.)
find /etc/munin/plugins/ -lname /usr/share/munin/plugins/ntp_ -print0 | xargs -0 /bin/rm
# Deactivate monitoring of network interfaces that are not up. Otherwise we can get a lot of empty charts.
for f in $(find /etc/munin/plugins/ \( -lname /usr/share/munin/plugins/if_ -o -lname /usr/share/munin/plugins/if_err_ -o -lname /usr/share/munin/plugins/bonding_err_ \)); do
IF=$(echo $f | sed s/.*_//);
if ! ifquery $IF >/dev/null 2>/dev/null; then
rm $f;
fi;
done
# Create a 'state' directory. Not sure why we need to do this manually.
mkdir -p /var/lib/munin-node/plugin-state/
# Restart services.
restart_service munin
restart_service munin-node
# generate initial statistics so the directory isn't empty
# (We get "Pango-WARNING **: error opening config file '/root/.config/pango/pangorc': Permission denied"
# if we don't explicitly set the HOME directory when sudo'ing.)
sudo -H -u munin munin-cron