blob: 812de2cbb29317a087f9d7cc28d38a5296e6cb16 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
|
# 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
}
|
