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contrib-munin/plugins/munin/munin_events

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#!/bin/sh
# -*- sh -*-
: <<=cut
=head1 NAME
munin_events - Plugin to monitor munin updates
=head1 APPLICABLE SYSTEMS
All systems with "bash", "logtail" and "munin"
=head1 CONFIGURATION
The following is the default configuration
[munin_events]
user munin
env.muninupdate /var/log/munin/munin-update.log
env.logtail2 /usr/sbin/logtail2
You could trigger alerts on update failures
[munin_events]
env.munin_fatal_critical 0
env.munin_error_critical 0
env.munin_warning_warning 0
env.munin_warning_critical 5
=head1 INTERPRETATION
This plugin shows a graph with one line per munin state:
INFO, WARNING, ERROR, FATAL.
=head1 MAGIC MARKERS
#%# family=auto
#%# capabilities=autoconf
=head1 VERSION
1.2.20160514
=head1 AUTHOR
Viktor Szépe <viktor@szepe.net>
=head1 LICENSE
GPLv2
=cut
##############################
# Includes
# shellcheck disable=SC1090
. "$MUNIN_LIBDIR/plugins/plugin.sh"
##############################
# Configurable variables
muninupdate=${muninupdate:-/var/log/munin/munin-update.log}
logtail_bin=${logtail_bin:-/usr/sbin/logtail2}
##############################
# Functions
# Print one value
do_value() {
FIELD="$1"
EVENT_LABEL="$2"
EVENT_COUNT="$("$logtail_bin" -t "$muninupdate" 2> /dev/null | grep -c "^[0-9/: ]\{19\} \[${EVENT_LABEL}\]")"
if echo "$EVENT_COUNT" | grep -q "[^0-9]"; then
echo "Cannot determine event count" 1>&2
exit 10
fi
echo "${FIELD}.value ${EVENT_COUNT}"
}
# Print the munin values
values() {
do_value 'munin_info' 'INFO'
do_value 'munin_warning' 'WARNING'
do_value 'munin_error' 'ERROR'
do_value 'munin_fatal' 'FATAL'
# Set offset
"$logtail_bin" "$muninupdate" > /dev/null 1>&2
chmod 640 "${muninupdate}.offset"
}
# Print the munin config
config() {
echo 'graph_title Munin update events groupped by log levels'
echo 'graph_info This graph shows INFO, WARNING, ERROR and FATAL events'
echo 'graph_category munin'
echo 'graph_vlabel Number of events'
echo 'graph_args --base 1000 -l 0'
echo 'graph_total total'
echo 'graph_printf %6.0lf'
echo 'munin_info.label INFO'
print_warning munin_info
print_critical munin_info
echo 'munin_warning.label WARNING'
print_warning munin_warning
print_critical munin_warning
echo 'munin_error.label ERROR'
print_warning munin_error
print_critical munin_error
echo 'munin_fatal.label FATAL'
print_warning munin_fatal
print_critical munin_fatal
}
# Print autoconfiguration hint
autoconf() {
if [ -r "${muninupdate}" ] && [ -x "$logtail_bin" ]; then
echo "yes"
else
echo "missing (${muninupdate} or (${logtail_bin})"
fi
exit
}
##############################
# Main
case "$1" in
config)
config
;;
autoconf)
autoconf
;;
*)
values
;;
esac