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Merge pull request #911 from pawohl/master

Add ILIAS plugin
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plugins/ilias/ilias_session Executable file
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#!/usr/bin/env bash
# Munin plugin for ILIAS
: << =cut
=head1 NAME
ilias_session - Munin plugin to monitor L<ILIAS|https://ilias.de/> open source
learning management system's sessions
=head1 DESCRIPTION
Reads session and user statistcs from any ILIAS MySQL/MariaDB database.
https://ilias.de/ | http://gallery.munin-monitoring.org/contrib/cms-index.html
Requirements:
bash version 4 is required for associative array support.
This plugin requires mysql CLI or a compatible client being available.
In order to get precise results, please ensure your MySQL server has the same
time as your ILIAS application server. Timezone does not matter.
=head1 CONFIGURATION
The plugin needs the following configuration settings e.g. in
/etc/munin/plugin-conf.d/ilias.conf
[ilias_session]
env.ildbuser ilias
env.ildbpassword youriliaspasword
env.ildb ilias
env.ildbhost localhost
env.ildbport 3306
WARNING: Setting env.ildbpassword will possibly expose the database password
to other processes and might be insecure.
=head1 AUTHOR
Copyright 2018 L<Felix Pahlow|https://wohlpa.de/>
(L<email|mailto:felix.pahlow@wohlpa.de>)
=head1 LICENSE
Licensed under the MIT license:
https://opensource.org/licenses/MIT
=head1 CONTRIBUTE
Find this plugin on L<GitHub
|https://github.com/munin-monitoring/contrib/tree/master/plugins/ilias>
=head1 MAGIC MARKERS
#%# family=auto
#%# capabilities=autoconf
=head1 VERSION
2.0
=head1 CHANGELOG
=head2 2.0 - 2018/04/20
first sh release
=head2 1.0 - 2018/03/19
first release
=cut
# Include plugin.sh
# shellcheck source=/dev/null
. "${MUNIN_LIBDIR:-}/plugins/plugin.sh"
# Shell options
set -o nounset # Like perl use strict;
# Graph settings
global_attr="
graph_title ILIAS session and logins
graph_category cms
graph_args --lower-limit 0
graph_vlabel occurences
graph_info Number of active ILIAS user sessions and logins
"
declare -A d_attr=( \
[0,field]=iltotal1day \
[0,type]=GAUGE \
[0,draw]=LINE \
[0,label]='users logged in within day' \
[0,sql]="SELECT COUNT( usr_id ) AS C
FROM \`usr_data\`
WHERE last_login >= DATE_SUB( NOW( ) , INTERVAL 1 DAY )
" \
[1,field]=ilsessions \
[1,type]=GAUGE \
[1,draw]=LINE \
[1,label]='active sessions' \
[1,sql]="SELECT COUNT( user_id ) AS C
FROM usr_session
WHERE \`expires\` > UNIX_TIMESTAMP( NOW( ) ) AND user_id != 0
" \
[2,field]=il60minavg \
[2,type]=GAUGE \
[2,draw]=LINE \
[2,label]='sessions created/updated within 1h' \
[2,sql]="SELECT COUNT( user_id ) AS C
FROM usr_session
WHERE 60 * 60 > UNIX_TIMESTAMP( NOW( ) ) - ctime AND user_id != 0
" \
[3,field]=il5minavg \
[3,type]=GAUGE \
[3,draw]=LINE \
[3,label]='sessions created/updated within 5min' \
[3,sql]="SELECT COUNT( user_id ) AS C
FROM usr_session
WHERE 5 * 60 > UNIX_TIMESTAMP( NOW( ) ) - ctime AND user_id != 0
" \
)
# Read the environment and apply defaults
DB_CLI_TOOL="${ildbcli:-mysql}"
DB_CLI_CMD="$(command -v "${DB_CLI_TOOL}")"
DB_HOST="${ildbhost:-localhost}"
DB_PORT="${ildbport:-3306}"
DB="${ildb:-ilias}"
DB_USER="${ildbuser:-root}"
DB_PASSWORD="${ildbpassword:-}"
# Functions
autoconf() {
if command -v "${DB_CLI_TOOL}" >/dev/null ; then
echo yes
else
echo "no (failed to find executable '${DB_CLI_TOOL}')"
fi
}
config() {
local label_max_length=45
local i=0
# print global attributes
echo "$global_attr" | sed -e 's/^ *//' -e '/^$/d'
i=0
# -v varname
# True if the shell variable varname is set (has been assigned a value).
# https://stackoverflow.com/a/45385463/2683737
while [[ -v d_attr[$i,field] ]]; do
field=${d_attr[$i,field]}
echo "$field.type ${d_attr[$i,type]}"
echo "$field.draw ${d_attr[$i,draw]}"
echo "$field.label ${d_attr[$i,label]:0:${label_max_length}}"
echo "$field.min 0"
((++i))
done
}
# Join a bash array $1 is the glue
join_by() {
local d=$1
shift
echo -n "$1"
shift
printf "%s" "${@/#/$d}"
}
fetch() {
local i=0
local query=()
local query_string=""
declare -a results
# create an array of queries
i=0
while [[ -v d_attr[$i,field] ]]; do
query+=("${d_attr[$i,sql]}")
((++i))
done
# build query by joining the array elements
query_string=$(join_by " UNION ALL " "${query[@]}")
# obtain result using CLI call; don't supply password through
# command line; note that MySQL considers it insecure using
# an environment variable:
# >This method of specifying your MySQL password must
# >be considered extremely insecure and should not be used.
# >Some versions of ps include an option to display the
# >environment of running processes. [...]
result=$(MYSQL_PWD="$DB_PASSWORD" \
"$DB_CLI_CMD" \
--skip-column-names \
-h "$DB_HOST" \
-u "$DB_USER" \
-P "$DB_PORT" \
"$DB" \
-e "$query_string" )
# initialize array
mapfile -t results <<< "$result"
# extract result and echo it to stdout, which is
# captured by Munin
i=0
while [[ -v d_attr[$i,field] ]]; do
echo "${d_attr[$i,field]}.value ${results[$i]}"
((++i))
done
}
# Main
case ${1:-} in
autoconf)
autoconf
;;
config)
config
[ "${MUNIN_CAP_DIRTYCONFIG:-}" = "1" ] && fetch
;;
*)
fetch
;;
esac
exit 0