diff options
Diffstat (limited to 'collectors/charts.d.plugin/nginx/nginx.chart.sh')
| -rw-r--r-- | collectors/charts.d.plugin/nginx/nginx.chart.sh | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/collectors/charts.d.plugin/nginx/nginx.chart.sh b/collectors/charts.d.plugin/nginx/nginx.chart.sh new file mode 100644 index 000000000..14dda0832 --- /dev/null +++ b/collectors/charts.d.plugin/nginx/nginx.chart.sh @@ -0,0 +1,144 @@ +# shellcheck shell=bash +# no need for shebang - this file is loaded from charts.d.plugin +# SPDX-License-Identifier: GPL-3.0-or-later + +# netdata +# real-time performance and health monitoring, done right! +# (C) 2016 Costa Tsaousis <costa@tsaousis.gr> +# + +# 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" +nginx_curl_opts="" + +# _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() { + # shellcheck disable=SC2207 + nginx_response=($(run curl -Ss ${nginx_curl_opts} "${nginx_url}")) + # shellcheck disable=SC2181 + if [ $? -ne 0 ] || [ "${#nginx_response[@]}" -eq 0 ]; then return 1; fi + + if [ "${nginx_response[0]}" != "Active" ] ||\ + [ "${nginx_response[1]}" != "connections:" ] ||\ + [ "${nginx_response[3]}" != "server" ] ||\ + [ "${nginx_response[4]}" != "accepts" ] ||\ + [ "${nginx_response[5]}" != "handled" ] ||\ + [ "${nginx_response[6]}" != "requests" ] ||\ + [ "${nginx_response[10]}" != "Reading:" ] ||\ + [ "${nginx_response[12]}" != "Writing:" ] ||\ + [ "${nginx_response[14]}" != "Waiting:" ] + then + error "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 "${nginx_active_connections}" ] ||\ + [ -z "${nginx_accepts}" ] ||\ + [ -z "${nginx_handled}" ] ||\ + [ -z "${nginx_requests}" ] ||\ + [ -z "${nginx_reading}" ] ||\ + [ -z "${nginx_writing}" ] ||\ + [ -z "${nginx_waiting}" ] + then + error "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 + # shellcheck disable=2181 + if [ $? -ne 0 ] + then + # shellcheck disable=SC2154 + error "cannot find stub_status on URL '${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_local.connections '' "nginx Active Connections" "connections" nginx nginx.connections line $((nginx_priority + 1)) $nginx_update_every +DIMENSION active '' absolute 1 1 + +CHART nginx_local.requests '' "nginx Requests" "requests/s" nginx nginx.requests line $((nginx_priority + 2)) $nginx_update_every +DIMENSION requests '' incremental 1 1 + +CHART nginx_local.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_local.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 continuously, 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_local.connections $1 +SET active = $((nginx_active_connections)) +END +BEGIN nginx_local.requests $1 +SET requests = $((nginx_requests)) +END +BEGIN nginx_local.connections_status $1 +SET reading = $((nginx_reading)) +SET writing = $((nginx_writing)) +SET waiting = $((nginx_waiting)) +END +BEGIN nginx_local.connect_rate $1 +SET accepts = $((nginx_accepts)) +SET handled = $((nginx_handled)) +END +VALUESEOF + + return 0 +} |