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
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
|
#!/usr/bin/env bash
me="${0}"
sendmail="$(which sendmail 2>/dev/null || command -v sendmail 2>/dev/null)"
if [ -z "${sendmail}" ]
then
echo >&2 "I cannot send emails - there is no sendmail command available."
fi
sendmail_from_pipe() {
"${sendmail}" -t
if [ $? -eq 0 ]
then
echo >&2 "${me}: Sent notification email for ${status} on '${chart}.${name}'"
return 0
else
echo >&2 "${me}: FAILED to send notification email for ${status} on '${chart}.${name}'"
return 1
fi
}
name="${1}" # the name of the alarm, as given in netdata health.d entries
chart="${2}" # the name of the chart (type.id)
family="${3}" # the family of the chart
status="${4}" # the current status : UNITIALIZED, UNDEFINED, CLEAR, WARNING, CRITICAL
old_status="${5}" # the previous status: UNITIALIZED, UNDEFINED, CLEAR, WARNING, CRITICAL
value="${6}" # the current value
old_value="${7}" # the previous value
src="${8}" # the line number and file the alarm has been configured
duration="${9}" # the duration in seconds the previous state took
non_clear_duration="${10}" # the total duration in seconds this is non-clear
units="${11}" # the units of the value
info="${12}" # a short description of the alarm
[ ! -z "${info}" ] && info=" <small><br/>${info}</small>"
# get the system hostname
hostname="${NETDATA_HOSTNAME}"
[ -z "${hostname}" ] && hostname="${NETDATA_REGISTRY_HOSTNAME}"
[ -z "${hostname}" ] && hostname="$(hostname)"
goto_url="${NETDATA_REGISTRY_URL}/goto-host-from-alarm.html?machine_guid=${NETDATA_REGISTRY_UNIQUE_ID}&chart=${chart}&family=${family}"
# get the current date
date="$(date)"
duration4human() {
local s="${1}" d=0 h=0 m=0 ds="day" hs="hour" ms="minute" ss="second"
d=$(( s / 86400 ))
s=$(( s - (d * 86400) ))
h=$(( s / 3600 ))
s=$(( s - (h * 3600) ))
m=$(( s / 60 ))
s=$(( s - (m * 60) ))
if [ ${d} -gt 0 ]
then
[ ${m} -ge 30 ] && h=$(( h + 1 ))
[ ${d} -gt 1 ] && ds="days"
[ ${h} -gt 1 ] && hs="hours"
if [ ${h} -gt 0 ]
then
echo "${d} ${ds} and ${h} ${hs}"
else
echo "${d} ${ds}"
fi
elif [ ${h} -gt 0 ]
then
[ ${s} -ge 30 ] && m=$(( m + 1 ))
[ ${h} -gt 1 ] && hs="hours"
[ ${m} -gt 1 ] && ms="minutes"
if [ ${m} -gt 0 ]
then
echo "${h} ${hs} and ${m} ${ms}"
else
echo "${h} ${hs}"
fi
elif [ ${m} -gt 0 ]
then
[ ${m} -gt 1 ] && ms="minutes"
[ ${s} -gt 1 ] && ss="seconds"
if [ ${s} -gt 0 ]
then
echo "${m} ${ms} and ${s} ${ss}"
else
echo "${m} ${ms}"
fi
else
[ ${s} -gt 1 ] && ss="seconds"
echo "${s} ${ss}"
fi
}
severity="${status}"
raised_for="<br/>(was ${old_status,,} for $(duration4human ${duration}))"
status_message="status unknown"
color="grey"
alarm="${name} = ${value} ${units}"
# prepare the title based on status
case "${status}" in
CRITICAL)
status_message="is critical"
color="#ca414b"
;;
WARNING)
status_message="needs attention"
color="#caca4b"
;;
CLEAR)
status_message="recovered"
color="#77ca6d"
# don't show the value when the status is CLEAR
# for certain alarms, this value might not have any meaning
alarm="${name}"
;;
esac
if [ "${status}" != "WARNING" -a "${status}" != "CRITICAL" -a "${status}" != "CLEAR" ]
then
# don't do anything if this is not WARNING, CRITICAL or CLEAR
echo >&2 "${me}: not sending notification email for ${status} on '${chart}.${name}'"
exit 0
elif [ "${old_status}" != "WARNING" -a "${old_status}" != "CRITICAL" -a "${status}" = "CLEAR" ]
then
# don't do anything if this is CLEAR, but it was not WARNING or CRITICAL
echo >&2 "${me}: not sending notification email for ${status} on '${chart}.${name}' (last status was ${old_status})"
exit 0
elif [ "${status}" = "CLEAR" ]
then
severity="Recovered from ${old_status}"
if [ $non_clear_duration -gt $duration ]
then
raised_for="<br/>(had issues for $(duration4human ${non_clear_duration}))"
fi
elif [ "${old_status}" = "WARNING" -a "${status}" = "CRITICAL" ]
then
severity="Escalated to ${status}"
if [ $non_clear_duration -gt $duration ]
then
raised_for="<br/>(has issues for $(duration4human ${non_clear_duration}))"
fi
elif [ "${old_status}" = "CRITICAL" -a "${status}" = "WARNING" ]
then
severity="Demoted to ${status}"
if [ $non_clear_duration -gt $duration ]
then
raised_for="<br/>(has issues for $(duration4human ${non_clear_duration}))"
fi
else
raised_for=
fi
# send the email
cat <<EOF | sendmail_from_pipe
To: root
Subject: ${hostname} ${status_message} - ${chart}.${name}
Content-Type: text/html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; box-sizing: border-box; font-size: 14px; margin: 0; padding: 0;">
<body style="font-family:'Helvetica Neue','Helvetica',Helvetica,Arial,sans-serif;font-size:14px;width:100%!important;min-height:100%;line-height:1.6;background:#f6f6f6;margin:0;padding:0">
<table>
<tbody>
<tr>
<td style="vertical-align:top;" valign="top"></td>
<td width="700" style="vertical-align:top;display:block!important;max-width:700px!important;clear:both!important;margin:0 auto;padding:0" valign="top">
<div style="max-width:700px;display:block;margin:0 auto;padding:20px">
<table width="100%" cellpadding="0" cellspacing="0"
style="background:#fff;border:1px solid #e9e9e9">
<tbody>
<tr>
<td bgcolor="#eee"
style="padding: 5px 20px 5px 20px;background-color:#eee;">
<div style="font-size:20px;color:#777;font-weight: bold;">netdata notification</div>
</td>
</tr>
<tr>
<td bgcolor="${color}"
style="font-size:16px;vertical-align:top;font-weight:400;text-align:center;margin:0;padding:10px;color:#ffffff;background:${color}!important;border:1px solid ${color};border-top-color:${color}" align="center" valign="top">
<h1 style="font-weight:400;margin:0">${hostname} ${status_message}</h1>
</td>
</tr>
<tr>
<td style="vertical-align:top" valign="top">
<div style="margin:0;padding:20px;max-width:700px">
<table width="100%" cellpadding="0" cellspacing="0" style="max-width:700px">
<tbody>
<tr>
<td style="font-size:18px;vertical-align:top;margin:0;padding:0 0 20px"
align="left" valign="top">
<span>${chart}</span>
<span style="display:block;color:#666666;font-size:12px;font-weight:300;line-height:1;text-transform:uppercase">Chart</span>
</td>
</tr>
<tr style="margin:0;padding:0">
<td style="font-size:18px;vertical-align:top;margin:0;padding:0 0 20px"
align="left" valign="top">
<span><b>${alarm}</b>${info}</span>
<span style="display:block;color:#666666;font-size:12px;font-weight:300;line-height:1;text-transform:uppercase">Alarm</span>
</td>
</tr>
<tr>
<td style="font-size:18px;vertical-align:top;margin:0;padding:0 0 20px"
align="left" valign="top">
<span>${family}</span>
<span style="display:block;color:#666666;font-size:12px;font-weight:300;line-height:1;text-transform:uppercase">Family</span>
</td>
</tr>
<tr style="margin:0;padding:0">
<td style="font-size:18px;vertical-align:top;margin:0;padding:0 0 20px"
align="left" valign="top">
<span>${severity}</span>
<span style="display:block;color:#666666;font-size:12px;font-weight:300;line-height:1;text-transform:uppercase">Severity</span>
</td>
</tr>
<tr style="margin:0;padding:0">
<td style="font-size:18px;vertical-align:top;margin:0;padding:0 0 20px"
align="left" valign="top"><span>${date}</span>
<span>${raised_for}</span> <span
style="display:block;color:#666666;font-size:12px;font-weight:300;line-height:1;text-transform:uppercase">Time</span>
</td>
</tr>
<!--
<tr style="margin:0;padding:0">
<td style="font-size:18px;vertical-align:top;margin:0;padding:0 0 20px">
<a href="${goto_url}" style="font-size:14px;color:#ffffff;text-decoration:none;line-height:1.5;font-weight:bold;text-align:center;display:inline-block;text-transform:capitalize;background:#35568d;border-width:1px;border-style:solid;border-color:#2b4c86;margin:0;padding:10px 15px" target="_blank">View Netdata</a>
</td>
</tr>
-->
<tr style="text-align:center;margin:0;padding:0">
<td style="font-size:11px;vertical-align:top;margin:0;padding:10px 0 0 0;color:#666666"
align="center" valign="bottom">The source of this alarm is line <code>${src}</code>
</td>
</tr>
<tr style="text-align:center;margin:0;padding:0">
<td style="font-size:12px;vertical-align:top;margin:0;padding:20px 0 0 0;color:#666666;border-top:1px solid #f0f0f0"
align="center" valign="bottom">Sent by
<a href="https://mynetdata.io/" target="_blank">netdata</a>, the real-time performance monitoring.
</td>
</tr>
</tbody>
</table>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</td>
</tr>
</tbody>
</table>
</body>
</html>
EOF
|
