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Diffstat (limited to 'charts.d/nginx.chart.sh')
| -rwxr-xr-x | charts.d/nginx.chart.sh | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/charts.d/nginx.chart.sh b/charts.d/nginx.chart.sh new file mode 100755 index 00000000..bc8293c5 --- /dev/null +++ b/charts.d/nginx.chart.sh @@ -0,0 +1,134 @@ +#!/bin/sh + +# if this chart is called X.chart.sh, then all functions and global variables +# must start with X_ + +nginx_url="http://127.0.0.1:80/stub_status" + +# _update_every is a special variable - it holds the number of seconds +# between the calls of the _update() function +nginx_update_every= +nginx_priority=60000 + +declare -a nginx_response=() +nginx_active_connections=0 +nginx_accepts=0 +nginx_handled=0 +nginx_requests=0 +nginx_reading=0 +nginx_writing=0 +nginx_waiting=0 +nginx_get() { + nginx_response=($(curl -s "${nginx_url}")) + [ $? -ne 0 -o "${#nginx_response[@]}" -eq 0 ] && return 1 + + if [ "${nginx_response[0]}" != "Active" \ + -o "${nginx_response[1]}" != "connections:" \ + -o "${nginx_response[3]}" != "server" \ + -o "${nginx_response[4]}" != "accepts" \ + -o "${nginx_response[5]}" != "handled" \ + -o "${nginx_response[6]}" != "requests" \ + -o "${nginx_response[10]}" != "Reading:" \ + -o "${nginx_response[12]}" != "Writing:" \ + -o "${nginx_response[14]}" != "Waiting:" \ + ] + then + echo >&2 "nginx: Invalid response from nginx server: ${nginx_response[*]}" + return 1 + fi + + nginx_active_connections="${nginx_response[2]}" + nginx_accepts="${nginx_response[7]}" + nginx_handled="${nginx_response[8]}" + nginx_requests="${nginx_response[9]}" + nginx_reading="${nginx_response[11]}" + nginx_writing="${nginx_response[13]}" + nginx_waiting="${nginx_response[15]}" + + if [ -z "${nginx_active_connections}" \ + -o -z "${nginx_accepts}" \ + -o -z "${nginx_handled}" \ + -o -z "${nginx_requests}" \ + -o -z "${nginx_reading}" \ + -o -z "${nginx_writing}" \ + -o -z "${nginx_waiting}" \ + ] + then + echo >&2 "nginx: empty values got from nginx server: ${nginx_response[*]}" + return 1 + fi + + return 0 +} + +# _check is called once, to find out if this chart should be enabled or not +nginx_check() { + + nginx_get + if [ $? -ne 0 ] + then + echo >&2 "nginx: cannot find stub_status on URL '${nginx_url}'. Please set nginx_url='http://nginx.server/stub_status' in $confd/nginx.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 +nginx_create() { + cat <<EOF +CHART nginx.connections '' "nginx Active Connections" "connections" nginx nginx.connections line $[nginx_priority + 1] $nginx_update_every +DIMENSION active '' absolute 1 1 + +CHART nginx.requests '' "nginx Requests" "requests/s" nginx nginx.requests line $[nginx_priority + 2] $nginx_update_every +DIMENSION requests '' incremental 1 1 + +CHART nginx.connections_status '' "nginx Active Connections by Status" "connections" nginx nginx.connections.status line $[nginx_priority + 3] $nginx_update_every +DIMENSION reading '' absolute 1 1 +DIMENSION writing '' absolute 1 1 +DIMENSION waiting idle absolute 1 1 + +CHART nginx.connect_rate '' "nginx Connections Rate" "connections/s" nginx nginx.connections.rate line $[nginx_priority + 4] $nginx_update_every +DIMENSION accepts accepted incremental 1 1 +DIMENSION handled '' incremental 1 1 +EOF + + return 0 +} + +# _update is called continiously, to collect the values +nginx_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 + + nginx_get || return 1 + + # write the result of the work. + cat <<VALUESEOF +BEGIN nginx.connections $1 +SET active = $[nginx_active_connections] +END +BEGIN nginx.requests $1 +SET requests = $[nginx_requests] +END +BEGIN nginx.connections_status $1 +SET reading = $[nginx_reading] +SET writing = $[nginx_writing] +SET waiting = $[nginx_waiting] +END +BEGIN nginx.connect_rate $1 +SET accepts = $[nginx_accepts] +SET handled = $[nginx_handled] +END +VALUESEOF + + return 0 +} |