Now there are 2 kinds of plugins:

 - plugins.d plugins that are expected to always be in memory and execute
   continiously

 - charts.d scripts that are sourced by the charts.d plugin
   and are all executed together, lowering significantly the resources
   they require (compared to plugins)

1 files changed, 97 insertions, 0 deletions

diff --git a/charts.d/squid.chart.sh b/charts.d/squid.chart.sh
new file mode 100755
index 0000000000..54a545a5cc
--- /dev/null
+++ b/charts.d/squid.chart.sh
@@ -0,0 +1,97 @@
+#!/bin/sh
+
+url="http://127.0.0.1:8080/squid-internal-mgr/counters"
+
+# report our PID back to netdata
+# this is required for netdata to kill this process when it exits
+echo "MYPID $$"
+
+# default sleep function
+loopsleepms() {
+	sleep $1
+}
+# if found and included, this file overwrites loopsleepms()
+# with a high resolution timer function for precise looping.
+. "`dirname $0`/loopsleepms.sh.inc"
+
+# netdata passes the requested update frequency as the first argument
+update_every=$1
+update_every=$(( update_every + 1 - 1))	# makes sure it is a number
+test $update_every -eq 0 && update_every=1 # if it is zero, make it 1
+
+# we accept a url as the second argument
+if [ ! -z "$2" ]
+then
+	url="$2"
+fi
+
+# check once if the url works
+wget 2>/dev/null -O /dev/null "$url"
+if [ ! $? -eq 0 ]
+then
+	# it does not work - disable the plugin
+	echo "DISABLE"
+	exit 1
+fi
+
+# create the charts
+cat <<EOF
+CHART squid.client_bandwidth '' "Squid Client Bandwidth" "kilobits/s" squid squid area 1 $update_every
+DIMENSION client_http_kbytes_in in incremental 8 1
+DIMENSION client_http_kbytes_out out incremental -8 1
+DIMENSION client_http_hit_kbytes_out hits incremental -8 1
+
+CHART squid.client_requests '' "Squid Client Requests" "requests/s" squid squid line 3 $update_every
+DIMENSION client_http_requests requests incremental 1 1
+DIMENSION client_http_hits hits incremental 1 1
+DIMENSION client_http_errors errors incremental -1 1
+
+CHART squid.server_bandwidth '' "Squid Server Bandwidth" "kilobits/s" squid squid area 2 $update_every
+DIMENSION server_all_kbytes_in in incremental 8 1
+DIMENSION server_all_kbytes_out out incremental -8 1
+
+CHART squid.server_requests '' "Squid Server Requests" "requests/s" squid squid line 4 $update_every
+DIMENSION server_all_requests requests incremental 1 1
+DIMENSION server_all_errors errors incremental -1 1
+EOF
+
+# You can create more charts if you like.
+# Just add more chart definitions.
+
+# work forever
+while [ 1 ]
+do
+	# do all the work to collect / calculate the values
+	# for each dimension
+
+	# get the values from squid
+	eval `wget 2>/dev/null -O - "$url" | sed -e "s/\./_/g" -e "s/ = /=/g" | egrep "(^client_http_|^server_all_)"`
+
+	# write the result of the work.
+	cat <<VALUESEOF
+BEGIN squid.client_bandwidth
+SET client_http_kbytes_in = $client_http_kbytes_in
+SET client_http_kbytes_out = $client_http_kbytes_out
+SET client_http_hit_kbytes_out = $client_http_hit_kbytes_out
+END
+
+BEGIN squid.client_requests
+SET client_http_requests = $client_http_requests
+SET client_http_hits = $client_http_hits
+SET client_http_errors = $client_http_errors
+END
+
+BEGIN squid.server_bandwidth
+SET server_all_kbytes_in = $server_all_kbytes_in
+SET server_all_kbytes_out = $server_all_kbytes_out
+END
+
+BEGIN squid.server_requests
+SET server_all_requests = $server_all_requests
+SET server_all_errors = $server_all_errors
+END
+VALUESEOF
+
+	# wait the time you are required to
+	loopsleepms $update_every
+done