# no need for shebang - this file is loaded from charts.d.plugin squid_host= squid_port= squid_url= squid_timeout=2 squid_update_every=2 squid_priority=60000 squid_get_stats_internal() { local host="$1" port="$2" url="$3" squidclient -h $host -p $port $url } squid_get_stats() { squid_get_stats_internal "$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 $confd/squid.conf" return 1 } squid_check() { require_cmd squidclient || return 1 require_cmd sed || return 1 require_cmd egrep || return 1 if [ -z "$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_local.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_local.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_local.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_local.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_local.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_local.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_local.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_local.servers_requests $1 SET server_all_requests = $squid_server_all_requests SET server_all_errors = $squid_server_all_errors END VALUESEOF return 0 }