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contrib-munin/plugins/varnish/varnish_devicedetect

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#!/bin/sh
# -*- sh -*-
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: <<EOF
=head1 NAME
varnish_devicedetect - Plugin to graph the device usage ratio of
website visitors
=head1 APPLICABLE SYSTEMS
Servers running varnish, and using the "varnish-devicedetect" VCL
(https://github.com/varnish/varnish-devicedetect)
=head1 CONFIGURATION
The plugin runs "varnishlog", and graphs the last 5 minutes of log
entries.
This configuration section shows the defaults of the plugin
=over 2
[varnish_devicedetect]
env.devices bot mobile-android mobile-iphone pc tablet-android tablet-ipad
=back
The "devices" list is a space separated list of devices, which should
match the headers set by the varnish-devicedect VCL.
=head1 INTERPRETATION
This plugin reads data from the Varnish shared memory log, and
presents a stacked percentage graph of the device types of your
website visitors for all entries present in the log, for the last 5
minutes.
The percentage shown per device is that of all devices, not just the
ones specified by env.devices.
=head1 AUTHOR
© 2012 - Stig Sandbeck Mathisen <ssm@fnord.no>
=head1 LICENSE
GPLv2
=head1 MAGIC MARKERS
#%# family=auto
#%# capabilities=autoconf
=cut
EOF
devices=${devices:-bot mobile-android mobile-iphone pc tablet-android tablet-ipad}
export devices
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print_config() {
printf "graph_title Varnish device detection\n"
printf "graph_vlabel percent\n"
printf "graph_category webserver\n"
printf "graph_args --rigid --lower-limit 0 --upper-limit 100\n"
for device in $devices; do
printf "%s.label %s\n" $device $device
printf "%s.type GAUGE\n" $device
printf "%s.draw AREASTACK\n" $device
done
}
autoconf() {
if $(which varnishlog >/dev/null); then
printf "yes\n"
else
printf "no (no varnishlog in path)\n"
return 1
fi
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}
print_values() {
varnishlog -d -i TxHeader -i ReqEnd -I X-UA-Device: \
| awk '
BEGIN {
start_time = systime() - 300
active = 0
# Initialize the devices array, so we print all, even the ones
# with zero value.
split(ENVIRON["devices"], devices)
for (device in devices) {
seen_devices[devices[device]] = 0
}
}
active == 0 && $2 == "ReqEnd" && $5 >= start_time {
active = 1
}
active == 1 && $2 == "TxHeader" && $4 == "X-UA-Device:" {
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total++;
seen_devices[$5]++
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}
END {
for (device in devices) {
if (total > 0)
percentage = seen_devices[devices[device]] / total * 100.0
else
percentage = 0
printf "%s.value %f\n", devices[device], percentage
}
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}
'
}
case $1 in
autoconf)
autoconf
;;
config)
print_config
;;
*)
print_values
;;
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esac