blob: e5c542a791b05d6a7995581aa85fd330c6e3fb8f (
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
142
143
144
|
#!/usr/bin/env bash
set -euo pipefail
warn=''
crit=''
url=''
query='.'
title=''
netrc=''
name='value'
unit=''
usage() {
cat <<USAGE
$0: reduce JSON response to an integer, check against thresholds.
This script uses:
jq - https://stedolan.github.io/jq/
cURL - https://curl.haxx.se/
Usage:
$0 [options]
Options:
-q <expression> jq query, must return an integer (default: $query)
-u <url> URL to fetch
-t <title> short description of the parameter
-p <name> name of the parameter (default: $name)
-m <unit> unit of measure (default: $unit)
-n <file> netrc file with credentials
-w <spec> warning threshold
-c <spec> critical threshold
Examples:
$0 -u example.com/errors_list -w 1 -c 4 -q '. | length'
$0 -u example.net/counter -w 1:4 -m c
USAGE
}
die () {
echo "$0: " "$@" >&2
exit 1
}
while [ $# -gt 0 ]; do
case "$1" in
-q) query="$2"; shift 2;;
-u) url="$2"; shift 2;;
-t) title="$2"; shift 2;;
-p) name="$2"; shift 2;;
-m) unit="$2"; shift 2;;
-n) netrc="$2"; shift 2;;
-w) warn="$2"; shift 2;;
-c) crit="$2"; shift 2;;
-h|--help) usage; exit 1;;
*) die "unsupported argument: $1";;
esac
done
inrange () {
local r v
local v1 v2
local outter
local sIFS
r="$1"
v="$2"
case "$r" in
@*) outter=true; r="${r/@/}";;
*) outter=false;;
esac
sIFS=$IFS
IFS=:
set -- $r
v1=${1-}
v2=${2-}
IFS=$sIFS
case "$v1" in
$r) v2=$v1; v1=0;;
~*) v1=;;
esac
if $outter; then
{ [ -n "$v1" ] && [ "$v" -le "$v1" ]; } || { [ -n "$v2" ] && [ "$v" -ge "$v2" ]; }
else
{ [ -z "$v1" ] || [ "$v" -ge "$v1" ]; } && { [ -z "$v2" ] || [ "$v" -le "$v2" ]; }
fi
}
[ -n "$url" ] || die "missing url"
cmd=(curl --fail --silent --show-error --location)
if [ -n "$netrc" ]; then
cmd+=(--netrc-file "$netrc")
fi
cmd+=("$url")
if ! out=$("${cmd[@]}" 2>&1); then
printf 'UNKNOWN: %s\n' "$(echo "$out" | grep . | head -n 1)"
exit 3
fi
json=$out
if ! value=$(echo "$json" | jq -c -r "$query" 2>&1); then
printf 'UNKNOWN: %s\n' "$(echo "$value" | grep . | head -n 1)"
exit 3
fi
if [[ ! "$value" =~ ^[-+]?[0-9]+$ ]]; then
echo "UNKNOWN: not an integer: $value"
exit 3
fi
stat="$name=$value$unit;$warn;$crit"
[ -n "$title" ] || title="some $name"
text="$value - $title|$stat"
if [ -n "$crit" ] && ! inrange "$crit" "$value"; then
echo "CRITICAL: $text"
exit 2
fi
if [ -n "$warn" ] && ! inrange "$warn" "$value"; then
echo "WARNING: $text"
exit 1
fi
echo "OK: $text"
exit 0
|
