Imported Upstream version 1.0.0upstream/1.0.0

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
+}