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#!/bin/sh
squid_host=
squid_port=
squid_url=
squid_timeout=2
squid_update_every=5
squid_priority=60000
squid_get_stats_internal() {
local host="$1" port="$2" url="$3"
nc -w $squid_timeout $host $port <<EOF
GET $url HTTP/1.0
Host: $host:$port
Accept: */*
User-Agent: netdata (charts.d/squid.chart.sh)
EOF
}
squid_get_stats() {
squid_get_stats_internal "$squid_host" "$squid_port" "$squid_url"
}
squid_autodetect() {
local host="127.0.0.1" port url x
for port in 3128 8080
do
for url in "cache_object://$host:$port/counters" "/squid-internal-mgr/counters"
do
x=$(squid_get_stats_internal "$host" "$port" "$url" | grep client_http.requests)
if [ ! -z "$x" ]
then
squid_host="$host"
squid_port="$port"
squid_url="$url"
echo >&2 "squid: found squid at '$host:$port' with url '$url'"
return 0
fi
done
done
echo >&2 "squid: cannot find squid running in localhost. Please set squid_url='url' and squid_host='IP' and squid_port='PORT' in $confd/squid.conf"
return 1
}
squid_check() {
require_cmd nc || return 1
require_cmd sed || return 1
require_cmd egrep || return 1
if [ -z "$squid_host" -o -z "$squid_port" -o -z "$squid_url" ]
then
squid_autodetect || return 1
fi
# check once if the url works
local x="$(squid_get_stats | grep client_http.requests)"
if [ ! $? -eq 0 -o -z "$x" ]
then
echo >&2 "squid: cannot fetch URL '$squid_url' by connecting to $squid_host:$squid_port. Please set squid_url='url' and squid_host='host' and squid_port='port' in $confd/squid.conf"
return 1
fi
return 0
}
squid_create() {
# create the charts
cat <<EOF
CHART squid.clients_net '' "Squid Client Bandwidth" "kilobits / sec" clients squid.clients.net area $[squid_priority + 1] $squid_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.clients_requests '' "Squid Client Requests" "requests / sec" clients squid.clients.requests line $[squid_priority + 3] $squid_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.servers_net '' "Squid Server Bandwidth" "kilobits / sec" servers squid.servers.net area $[squid_priority + 2] $squid_update_every
DIMENSION server_all_kbytes_in in incremental 8 1
DIMENSION server_all_kbytes_out out incremental -8 1
CHART squid.servers_requests '' "Squid Server Requests" "requests / sec" servers squid.servers.requests line $[squid_priority + 4] $squid_update_every
DIMENSION server_all_requests requests incremental 1 1
DIMENSION server_all_errors errors incremental -1 1
EOF
return 0
}
squid_update() {
# the first argument to this function is the microseconds since last update
# pass this parameter to the BEGIN statement (see bellow).
# do all the work to collect / calculate the values
# for each dimension
# remember: KEEP IT SIMPLE AND SHORT
# 1. get the counters page from squid
# 2. sed to remove spaces; replace . with _; remove spaces around =; prepend each line with: local squid_
# 3. egrep lines starting with:
# local squid_client_http_ then one or more of these a-z 0-9 _ then = and one of more of 0-9
# local squid_server_all_ then one or more of these a-z 0-9 _ then = and one of more of 0-9
# 4. then execute this as a script with the eval
#
# be very carefull with eval:
# prepare the script and always grep at the end the lines that are usefull, so that
# even if something goes wrong, no other code can be executed
eval "$(squid_get_stats |\
sed -e "s/ \+/ /g" -e "s/\./_/g" -e "s/^\([a-z0-9_]\+\) *= *\([0-9]\+\)$/local squid_\1=\2/g" |\
egrep "^local squid_(client_http|server_all)_[a-z0-9_]+=[0-9]+$")"
# write the result of the work.
cat <<VALUESEOF
BEGIN squid.clients_net $1
SET client_http_kbytes_in = $squid_client_http_kbytes_in
SET client_http_kbytes_out = $squid_client_http_kbytes_out
SET client_http_hit_kbytes_out = $squid_client_http_hit_kbytes_out
END
BEGIN squid.clients_requests $1
SET client_http_requests = $squid_client_http_requests
SET client_http_hits = $squid_client_http_hits
SET client_http_errors = $squid_client_http_errors
END
BEGIN squid.servers_net $1
SET server_all_kbytes_in = $squid_server_all_kbytes_in
SET server_all_kbytes_out = $squid_server_all_kbytes_out
END
BEGIN squid.servers_requests $1
SET server_all_requests = $squid_server_all_requests
SET server_all_errors = $squid_server_all_errors
END
VALUESEOF
return 0
}
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