the apache plugin

diff --git a/charts.d/apache.chart.sh b/charts.d/apache.chart.sh
new file mode 100755 (executable)
index 0000000..6c6e36e
--- /dev/null
+++ b/charts.d/apache.chart.sh
@@ -0,0 +1,185 @@
+#!/bin/sh
+
+# the URL to download apache status info
+apache_url="http://127.0.0.1:80/server-status?auto"
+
+# _update_every is a special variable - it holds the number of seconds
+# between the calls of the _update() function
+apache_update_every=
+
+# let netdata calculate averages (0)
+# or use apache calculated averages (1)
+apache_averages=0
+
+# convert apache floating point values
+# to integer using this multiplier
+# this only affects precision - the values
+# will be in the proper units
+apache_decimal_detail=1000000
+
+declare -a apache_response=()
+apache_accesses=0
+apache_kbytes=0
+apache_cpuload=0
+apache_uptime=0
+apache_reqpersec=0
+apache_bytespersec=0
+apache_bytesperreq=0
+apache_busyworkers=0
+apache_idleworkers=0
+apache_scoreboard=
+
+apache_get() {
+       apache_response=($(curl -s "${apache_url}"))
+       [ $? -ne 0 -o "${#apache_response[@]}" -eq 0 ] && return 1
+
+       if [ "${apache_response[0]}" != "Total" \
+                -o "${apache_response[1]}" != "Accesses:" \
+                -o "${apache_response[3]}" != "Total" \
+                -o "${apache_response[4]}" != "kBytes:" \
+                -o "${apache_response[6]}" != "CPULoad:" \
+                -o "${apache_response[8]}" != "Uptime:" \
+                -o "${apache_response[10]}" != "ReqPerSec:" \
+                -o "${apache_response[12]}" != "BytesPerSec:" \
+                -o "${apache_response[14]}" != "BytesPerReq:" \
+                -o "${apache_response[16]}" != "BusyWorkers:" \
+                -o "${apache_response[18]}" != "IdleWorkers:" \
+                -o "${apache_response[20]}" != "Scoreboard:" \
+          ]
+               then
+               echo >&2 "apache: Invalid response from apache server: ${apache_response[*]}"
+               return 1
+       fi
+
+       apache_accesses="${apache_response[2]}"
+       apache_kbytes="${apache_response[5]}"
+       
+       # float2int "${apache_response[7]}" ${apache_decimal_detail}
+       # apache_cpuload=${FLOAT2INT_RESULT}
+       
+       # apache_uptime="${apache_response[9]}"
+       
+       if [ ${apache_averages} -eq 1 ]
+               then
+               float2int "${apache_response[11]}" ${apache_decimal_detail}
+               apache_reqpersec=${FLOAT2INT_RESULT}
+
+               float2int "${apache_response[13]}" ${apache_decimal_detail}
+               apache_bytespersec=${FLOAT2INT_RESULT}
+       fi
+
+       float2int "${apache_response[15]}" ${apache_decimal_detail}
+       apache_bytesperreq=${FLOAT2INT_RESULT}
+
+       apache_busyworkers="${apache_response[17]}"
+       apache_idleworkers="${apache_response[19]}"
+       apache_scoreboard="${apache_response[21]}"
+
+       if [ -z "${apache_accesses}" \
+               -o -z "${apache_kbytes}" \
+               -o -z "${apache_cpuload}" \
+               -o -z "${apache_uptime}" \
+               -o -z "${apache_reqpersec}" \
+               -o -z "${apache_bytespersec}" \
+               -o -z "${apache_bytesperreq}" \
+               -o -z "${apache_busyworkers}" \
+               -o -z "${apache_idleworkers}" \
+               -o -z "${apache_scoreboard}" \
+               ]
+               then
+               echo >&2 "apache: empty values got from apache server: ${apache_response[*]}"
+               return 1
+       fi
+
+       return 0
+}
+
+# _check is called once, to find out if this chart should be enabled or not
+apache_check() {
+
+       apache_get
+       if [ $? -ne 0 ]
+               then
+               echo >&2 "apache: cannot find stub_status on URL '${apache_url}'. Please set apache_url='http://apache.server:80/server-status?auto' in $confd/apache.conf"
+               return 1
+       fi
+
+       # this should return:
+       #  - 0 to enable the chart
+       #  - 1 to disable the chart
+
+       return 0
+}
+
+# _create is called once, to create the charts
+apache_create() {
+       cat <<EOF
+CHART apache.bytesperreq '' "apache Average Response Size (lifetime)" "bytes/request" apache apache area 16005 $apache_update_every
+DIMENSION size '' absolute 1 ${apache_decimal_detail}
+CHART apache.workers '' "apache Workers" "workers" apache apache stacked 16006 $apache_update_every
+DIMENSION idle '' absolute 1 1
+DIMENSION busy '' absolute 1 1
+EOF
+
+       if [ ${apache_averages} -eq 1 ]
+               then
+               # apache calculated averages
+               cat <<EOF2
+CHART apache.requests '' "apache Requests" "requests/s" apache apache line 16001 $apache_update_every
+DIMENSION requests '' absolute 1 ${apache_decimal_detail}
+CHART apache.net '' "apache Bandwidth" "kilobits/s" apache apache area 16002 $apache_update_every
+DIMENSION sent '' absolute 8 $[apache_decimal_detail * 1000]
+EOF2
+       else
+               # netdata calculated averages
+               cat <<EOF3
+CHART apache.requests '' "apache Requests" "requests/s" apache apache line 16001 $apache_update_every
+DIMENSION requests '' incremental 1 1
+CHART apache.net '' "apache Bandwidth" "kilobits/s" apache apache area 16002 $apache_update_every
+DIMENSION sent '' incremental 8 1
+EOF3
+       fi
+
+       return 0
+}
+
+# _update is called continiously, to collect the values
+apache_update() {
+       local reqs net
+       # 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
+
+       apache_get || return 1
+
+       if [ ${apache_averages} -eq 1 ]
+               then
+               reqs=${apache_reqpersec}
+               net=${apache_bytespersec}
+       else
+               reqs=${apache_accesses}
+               net=${apache_kbytes}
+       fi
+
+       # write the result of the work.
+       cat <<VALUESEOF
+BEGIN apache.requests $1
+SET requests = $[reqs]
+END
+BEGIN apache.net $1
+SET sent = $[net]
+END
+BEGIN apache.bytesperreq $1
+SET size = $[apache_bytesperreq]
+END
+BEGIN apache.workers $1
+SET idle = $[apache_idleworkers]
+SET busy = $[apache_busyworkers]
+END
+VALUESEOF
+
+       return 0
+}