plugins.d/alarm-notify.sh

   1 #!/usr/bin/env bash
   2
   3 # (C) Costa Tsaousis
   4 # pushover support by Jan Arnold
   5
   6 me="${0}"
   7
   8 if [ $(( ${BASH_VERSINFO[0]} )) -lt 4 ]
   9 then
  10     echo >&2
  11     echo >&2 "$me: ERROR"
  12     echo >&2 "BASH version 4 or later is required."
  13     echo >&2 "You are running version: ${BASH_VERSION}"
  14     echo >&2 "Please upgrade."
  15     echo >&2
  16     exit 1
  17 fi
  18
  19 # -----------------------------------------------------------------------------
  20 # parse command line parameters
  21
  22 recipient="${1}"   # the recepient of the email
  23 host="${2}"        # the host this event refers to
  24 unique_id="${3}"   # the unique id of this event
  25 alarm_id="${4}"    # the unique id of the alarm that generated this event
  26 event_id="${5}"    # the incremental id of the event, for this alarm
  27 when="${6}"        # the timestamp this event occured
  28 name="${7}"        # the name of the alarm, as given in netdata health.d entries
  29 chart="${8}"       # the name of the chart (type.id)
  30 family="${9}"      # the family of the chart
  31 status="${10}"     # the current status : REMOVED, UNITIALIZED, UNDEFINED, CLEAR, WARNING, CRITICAL
  32 old_status="${11}" # the previous status: REMOVED, UNITIALIZED, UNDEFINED, CLEAR, WARNING, CRITICAL
  33 value="${12}"      # the current value
  34 old_value="${13}"  # the previous value
  35 src="${14}"        # the line number and file the alarm has been configured
  36 duration="${15}"   # the duration in seconds the previous state took
  37 non_clear_duration="${16}" # the total duration in seconds this is non-clear
  38 units="${17}"      # the units of the value
  39 info="${18}"       # a short description of the alarm
  40
  41 # -----------------------------------------------------------------------------
  42 # screen statuses we don't need to send a notification
  43
  44 # don't do anything if this is not WARNING, CRITICAL or CLEAR
  45 if [ "${status}" != "WARNING" -a "${status}" != "CRITICAL" -a "${status}" != "CLEAR" ]
  46 then
  47     echo >&2 "${me}: not sending notification for ${status} on '${chart}.${name}'"
  48     exit 1
  49 fi
  50
  51 # don't do anything if this is CLEAR, but it was not WARNING or CRITICAL
  52 if [ "${old_status}" != "WARNING" -a "${old_status}" != "CRITICAL" -a "${status}" = "CLEAR" ]
  53 then
  54     echo >&2 "${me}: not sending notification for ${status} on '${chart}.${name}' (last status was ${old_status})"
  55     exit 1
  56 fi
  57
  58 # -----------------------------------------------------------------------------
  59 # load configuration
  60
  61 # needed commands
  62 # if empty they will be searched in the system path
  63 curl=
  64 sendmail=
  65
  66 # enable / disable features
  67 SEND_SLACK="YES"
  68 SEND_PUSHOVER="YES"
  69 SEND_EMAIL="YES"
  70
  71 # slack configs
  72 SLACK_WEBHOOK_URL=
  73 DEFAULT_RECIPIENT_SLACK=
  74 declare -A role_recipients_slack=()
  75
  76 # pushover configs
  77 PUSHOVER_APP_TOKEN=
  78 DEFAULT_RECIPIENT_PUSHOVER=
  79 declare -A role_recipients_pushover=()
  80
  81 # email configs
  82 DEFAULT_RECIPIENT_EMAIL="root"
  83 declare -A role_recipients_email=()
  84
  85 # load the user configuration
  86 # this will overwrite the variables above
  87 if [ -f "${NETDATA_CONFIG_DIR}/health_alarm_notify.conf" ]
  88     then
  89     source "${NETDATA_CONFIG_DIR}/health_alarm_notify.conf"
  90 fi
  91
  92 # -----------------------------------------------------------------------------
  93 # find the recipient's addresses per method
  94
  95 declare -A arr_slack=()
  96 declare -A arr_pushover=()
  97 declare -A arr_email=()
  98
  99 # netdata may call us with multiple recipients
 100 # so, here we find the unique ones
 101 for x in ${recipient//,/ }
 102 do
 103     # email
 104     a="${role_recipients_email[${recipient}]}"
 105     [ -z "${a}" ] && a="${DEFAULT_RECIPIENT_EMAIL}"
 106     for r in ${a//,/ }; do arr_email[${r}]="1"; done
 107
 108     # pushover
 109     a="${role_recipients_pushover[${recipient}]}"
 110     [ -z "${a}" ] && a="${DEFAULT_RECIPIENT_PUSHOVER}"
 111     for r in ${a//,/ }; do arr_pushover[${r}]="1"; done
 112
 113     # slack
 114     a="${role_recipients_slack[${recipient}]}"
 115     [ -z "${a}" ] && a="${DEFAULT_RECIPIENT_SLACK}"
 116     for r in ${a//,/ }; do arr_slack[${r}]="1"; done
 117 done
 118
 119 # build the list of slack recipients (channels)
 120 to_slack="${!arr_slack[*]}"
 121 [ -z "${to_slack}" ] && SEND_SLACK="NO"
 122
 123 # build the list of pushover recipients (user tokens)
 124 to_pushover="${!arr_pushover[*]}"
 125 [ -z "${to_pushover}" ] && SEND_PUSHOVER="NO"
 126
 127 # build the list of email recipients (email addresses)
 128 to_email=
 129 for x in "${!arr_email[*]}"
 130 do
 131     [ ! -z "${to_email}" ] && to_email="${to_email}, "
 132     to_email="${to_email}${x}"
 133 done
 134 [ -z "${to_email}" ] && to_email="root"
 135
 136
 137 # -----------------------------------------------------------------------------
 138 # verify the delivery methods supported
 139
 140 # check slack
 141 [ -z "${SLACK_WEBHOOK_URL}" ] && SEND_SLACK="NO"
 142
 143 # check pushover
 144 [ -z "${PUSHOVER_APP_TOKEN}" ] && SEND_PUSHOVER="NO"
 145
 146 if [ \( "${SEND_PUSHOVER}" = "YES" -o "${SEND_SLACK}" = "YES" \) -a -z "${curl}" ]
 147     then
 148     curl="$(which curl 2>/dev/null || command -v curl 2>/dev/null)"
 149     if [ -z "${curl}" ]
 150         then
 151         SEND_PUSHOVER="NO"
 152         SEND_SLACK="NO"
 153     fi
 154 fi
 155
 156 if [ "${SEND_EMAIL}" = "YES" -a -z "${sendmail}" ]
 157     then
 158     sendmail="$(which sendmail 2>/dev/null || command -v sendmail 2>/dev/null)"
 159     [ -z "${sendmail}" ] && SEND_EMAIL="NO"
 160 fi
 161
 162 # check that we have at least a method enabled
 163 if [ "${SEND_EMAIL}" != "YES" -a "${SEND_PUSHOVER}" != "YES" -a "${SEND_SLACK}" != "YES" ]
 164     then
 165     echo >&2 "I don't have a means to send a notification. Sorry!"
 166     exit 1
 167 fi
 168
 169 # -----------------------------------------------------------------------------
 170 # get the system hostname
 171
 172 [ -z "${host}" ] && host="${NETDATA_HOSTNAME}"
 173 [ -z "${host}" ] && host="${NETDATA_REGISTRY_HOSTNAME}"
 174 [ -z "${host}" ] && host="$(hostname 2>/dev/null)"
 175
 176 # -----------------------------------------------------------------------------
 177 # get the date the alarm happened
 178
 179 date="$(date --date=@${when} 2>/dev/null)"
 180 [ -z "${date}" ] && date="$(date 2>/dev/null)"
 181
 182 # -----------------------------------------------------------------------------
 183 # URL encode a string
 184
 185 urlencode() {
 186     local string="${1}" strlen encoded pos c o
 187
 188     strlen=${#string}
 189     for (( pos=0 ; pos<strlen ; pos++ ))
 190     do
 191         c=${string:$pos:1}
 192         case "$c" in
 193             [-_.~a-zA-Z0-9])
 194                 o="${c}"
 195                 ;;
 196
 197             *)
 198                 printf -v o '%%%02x' "'$c"
 199                 ;;
 200         esac
 201         encoded+="${o}"
 202     done
 203
 204     REPLY="${encoded}"
 205     echo "${REPLY}"
 206 }
 207
 208 # -----------------------------------------------------------------------------
 209 # convert a duration in seconds, to a human readable duration
 210 # using DAYS, MINUTES, SECONDS
 211
 212 duration4human() {
 213     local s="${1}" d=0 h=0 m=0 ds="day" hs="hour" ms="minute" ss="second" ret
 214     d=$(( s / 86400 ))
 215     s=$(( s - (d * 86400) ))
 216     h=$(( s / 3600 ))
 217     s=$(( s - (h * 3600) ))
 218     m=$(( s / 60 ))
 219     s=$(( s - (m * 60) ))
 220
 221     if [ ${d} -gt 0 ]
 222     then
 223         [ ${m} -ge 30 ] && h=$(( h + 1 ))
 224         [ ${d} -gt 1 ] && ds="days"
 225         [ ${h} -gt 1 ] && hs="hours"
 226         if [ ${h} -gt 0 ]
 227         then
 228             ret="${d} ${ds} and ${h} ${hs}"
 229         else
 230             ret="${d} ${ds}"
 231         fi
 232     elif [ ${h} -gt 0 ]
 233     then
 234         [ ${s} -ge 30 ] && m=$(( m + 1 ))
 235         [ ${h} -gt 1 ] && hs="hours"
 236         [ ${m} -gt 1 ] && ms="minutes"
 237         if [ ${m} -gt 0 ]
 238         then
 239             ret="${h} ${hs} and ${m} ${ms}"
 240         else
 241             ret="${h} ${hs}"
 242         fi
 243     elif [ ${m} -gt 0 ]
 244     then
 245         [ ${m} -gt 1 ] && ms="minutes"
 246         [ ${s} -gt 1 ] && ss="seconds"
 247         if [ ${s} -gt 0 ]
 248         then
 249             ret="${m} ${ms} and ${s} ${ss}"
 250         else
 251             ret="${m} ${ms}"
 252         fi
 253     else
 254         [ ${s} -gt 1 ] && ss="seconds"
 255         ret="${s} ${ss}"
 256     fi
 257
 258     REPLY="${ret}"
 259     echo "${REPLY}"
 260 }
 261
 262 # -----------------------------------------------------------------------------
 263 # email sender
 264
 265 send_email() {
 266     local ret=
 267     if [ "${SEND_EMAIL}" = "YES" ]
 268         then
 269
 270         "${sendmail}" -t
 271         ret=$?
 272
 273         if [ $ret -eq 0 ]
 274         then
 275             echo >&2 "${me}: Sent email notification for: ${host} ${chart}.${name} is ${status} to '${to_email}'"
 276             return 0
 277         else
 278             echo >&2 "${me}: Failed to send email notification for: ${host} ${chart}.${name} is ${status} to '${to_email}' with error code ${ret}."
 279             return 1
 280         fi
 281     fi
 282
 283     return 1
 284 }
 285
 286 # -----------------------------------------------------------------------------
 287 # pushover sender
 288
 289 send_pushover() {
 290     local apptoken="${1}" usertokens="${2}" when="${3}" url="${4}" status="${5}" title="${6}" message="${7}" httpcode sent=0 user priority
 291
 292     if [ "${SEND_PUSHOVER}" = "YES" -a ! -z "${apptoken}" -a ! -z "${usertokens}" -a ! -z "${title}" -a ! -z "${message}" ]
 293         then
 294
 295         priority=0
 296         [ "${status}" = "CRITICAL" ] && priority=1
 297
 298         for user in ${usertokens}
 299         do
 300             httpcode=$(${curl} --write-out %{http_code} --silent --output /dev/null \
 301                 --form-string "token=${apptoken}" \
 302                 --form-string "user=${user}" \
 303                 --form-string "html=1" \
 304                 --form-string "title=${title}" \
 305                 --form-string "message=${message}" \
 306                 --form-string "timestamp=${when}" \
 307                 --form-string "url=${url}" \
 308                 --form-string "url_title=Open netdata dashboard to view the alarm" \
 309                 --form-string "priority=${priority}" \
 310                 https://api.pushover.net/1/messages.json)
 311
 312             if [ "${httpcode}" == "200" ]
 313             then
 314                 echo >&2 "${me}: Sent pushover notification for: ${host} ${chart}.${name} is ${status} to '${user}'"
 315                 sent=$((sent + 1))
 316             else
 317                 echo >&2 "${me}: Failed to send pushover notification for: ${host} ${chart}.${name} is ${status} to '${user}' with HTTP error code ${httpcode}."
 318             fi
 319         done
 320
 321         [ ${sent} -gt 0 ] && return 0
 322     fi
 323
 324     return 1
 325 }
 326
 327 # -----------------------------------------------------------------------------
 328 # slack sender
 329
 330 send_slack() {
 331     local webhook="${1}" channels="${2}" when="${3}" username="${4}" image="${5}" author="${6}" httpcode sent=0 channel color
 332
 333     if [ "${SEND_SLACK}" = "YES" -a ! -z "${webhook}" -a ! -z "${channels}" -a ! -z "${username}" -a ! -z "${image}" -a ! -z "${author}" ]
 334         then
 335
 336         case "${status}" in
 337             WARNING) color="warning" ;;
 338             CRITICAL) color="danger" ;;
 339             CLEAR) color="good" ;;
 340             *) color="#777777" ;;
 341         esac
 342
 343         for channel in ${channels}
 344         do
 345             httpcode=$(${curl} --write-out %{http_code} --silent --output /dev/null -X POST --data-urlencode \
 346                 "payload={\"channel\": \"#${channel}\", \"username\": \"${username}\", \"text\": \"${host} ${status_message} - ${author} ${raised_for} - click <${goto_url}|here> to view the netdata dashboard.\", \"icon_url\": \"${image}\", \"attachments\": [{\"fallback\": \"${alarm} - ${info}\", \"color\": \"${color}\", \"title\": \"${alarm}\", \"title_link\": \"${goto_url}\", \"text\": \"${info}\", \"footer\": \"netdata\", \"footer_icon\": \"${NETDATA_REGISTRY_URL}/images/seo-performance-128.png\", \"ts\": ${when}}]}" \
 347                 "${webhook}")
 348
 349             if [ "${httpcode}" == "200" ]
 350             then
 351                 echo >&2 "${me}: Sent slack notification for: ${host} ${chart}.${name} is ${status} to '${channel}'"
 352                 sent=$((sent + 1))
 353             else
 354                 echo >&2 "${me}: Failed to send slack notification for: ${host} ${chart}.${name} is ${status} to '${channel}', with HTTP error code ${httpcode}."
 355             fi
 356         done
 357
 358         [ ${sent} -gt 0 ] && return 0
 359     fi
 360
 361     return 1
 362 }
 363
 364
 365 # -----------------------------------------------------------------------------
 366 # prepare the content of the notification
 367
 368 # the url to send the user on click
 369 urlencode "${NETDATA_REGISTRY_HOSTNAME}" >/dev/null; url_host="${REPLY}"
 370 urlencode "${chart}" >/dev/null; url_chart="${REPLY}"
 371 urlencode "${family}" >/dev/null; url_family="${REPLY}"
 372 urlencode "${name}" >/dev/null; url_name="${REPLY}"
 373 goto_url="${NETDATA_REGISTRY_URL}/goto-host-from-alarm.html?host=${url_host}&chart=${url_chart}&family=${url_family}&alarm=${url_name}&alarm_unique_id=${unique_id}&alarm_id=${alarm_id}&alarm_event_id=${event_id}"
 374
 375 # the severity of the alarm
 376 severity="${status}"
 377
 378 # the time the alarm was raised
 379 duration4human ${duration} >/dev/null; duration_txt="${REPLY}"
 380 duration4human ${non_clear_duration} >/dev/null; non_clear_duration_txt="${REPLY}"
 381 raised_for="(was ${old_status,,} for ${duration_txt}"
 382
 383 # the key status message
 384 status_message="status unknown"
 385
 386 # the color of the alarm
 387 color="grey"
 388
 389 # the alarm value
 390 alarm="${name//_/ } = ${value} ${units}"
 391
 392 # the image of the alarm
 393 image="${NETDATA_REGISTRY_URL}/images/seo-performance-128.png"
 394
 395 # prepare the title based on status
 396 case "${status}" in
 397         CRITICAL)
 398         image="${NETDATA_REGISTRY_URL}/images/alert-128-red.png"
 399         status_message="is critical"
 400         color="#ca414b"
 401         ;;
 402
 403     WARNING)
 404         image="${NETDATA_REGISTRY_URL}/images/alert-128-orange.png"
 405         status_message="needs attention"
 406         color="#caca4b"
 407                 ;;
 408
 409         CLEAR)
 410         image="${NETDATA_REGISTRY_URL}/images/check-mark-2-128-green.png"
 411         status_message="recovered"
 412                 color="#77ca6d"
 413
 414                 # don't show the value when the status is CLEAR
 415                 # for certain alarms, this value might not have any meaning
 416                 alarm="${name//_/ }"
 417                 ;;
 418 esac
 419
 420 if [ "${status}" = "CLEAR" ]
 421 then
 422     severity="Recovered from ${old_status}"
 423     if [ $non_clear_duration -gt $duration ]
 424     then
 425         raised_for="(alarm was raised for ${non_clear_duration_txt})"
 426     fi
 427
 428 elif [ "${old_status}" = "WARNING" -a "${status}" = "CRITICAL" ]
 429 then
 430     severity="Escalated to ${status}"
 431     if [ $non_clear_duration -gt $duration ]
 432     then
 433         raised_for="(alarm is raised for ${non_clear_duration_txt})"
 434     fi
 435
 436 elif [ "${old_status}" = "CRITICAL" -a "${status}" = "WARNING" ]
 437 then
 438     severity="Demoted to ${status}"
 439     if [ $non_clear_duration -gt $duration ]
 440     then
 441         raised_for="(alarm is raised for ${non_clear_duration_txt})"
 442     fi
 443
 444 else
 445     raised_for=
 446 fi
 447
 448 # prepare HTML versions of elements
 449 info_html=
 450 [ ! -z "${info}" ] && info_html=" <small><br/>${info}</small>"
 451
 452 raised_for_html=
 453 [ ! -z "${raised_for}" ] && raised_for_html="<br/><small>${raised_for}</small>"
 454
 455 # -----------------------------------------------------------------------------
 456 # send the slack notification
 457
 458 # slack aggregates posts from the same username
 459 # so we use "${host} ${status}" as the bot username, to make them diff
 460
 461 send_slack "${SLACK_WEBHOOK_URL}" "${to_slack}" "${when}" "${host} ${status}" "${image}" "${chart} (${family})"
 462 SENT_SLACK=$?
 463
 464 # -----------------------------------------------------------------------------
 465 # send the pushover notification
 466
 467 send_pushover "${PUSHOVER_APP_TOKEN}" "${to_pushover}" "${when}" "${goto_url}" "${status}" "${host} ${status_message} - ${name//_/ } - ${chart}" "
 468 <font color=\"${color}\"><b>${alarm}</b></font>${info_html}<br/>&nbsp;
 469 <small><b>${chart}</b><br/>Chart<br/>&nbsp;</small>
 470 <small><b>${family}</b><br/>Family<br/>&nbsp;</small>
 471 <small><b>${severity}</b><br/>Severity<br/>&nbsp;</small>
 472 <small><b>${date}${raised_for_html}</b><br/>Time<br/>&nbsp;</small>
 473 <a href=\"${goto_url}\">View Netdata</a><br/>&nbsp;
 474 <small><small>The source of this alarm is line ${src}</small></small>
 475 "
 476
 477 SENT_PUSHOVER=$?
 478
 479 # -----------------------------------------------------------------------------
 480 # send the email
 481
 482 send_email <<EOF
 483 To: ${to_email}
 484 Subject: ${host} ${status_message} - ${name//_/ } - ${chart}
 485 Content-Type: text/html
 486
 487 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 488 <html xmlns="http://www.w3.org/1999/xhtml" style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; box-sizing: border-box; font-size: 14px; margin: 0; padding: 0;">
 489 <body style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 14px; width: 100% !important; min-height: 100%; line-height: 1.6; background: #f6f6f6; margin:0; padding: 0;">
 490 <table>
 491     <tbody>
 492     <tr>
 493         <td style="vertical-align: top;" valign="top"></td>
 494         <td width="700" style="vertical-align: top; display: block !important; max-width: 700px !important; clear: both !important; margin: 0 auto; padding: 0;" valign="top">
 495             <div style="max-width: 700px; display: block; margin: 0 auto; padding: 20px;">
 496                 <table width="100%" cellpadding="0" cellspacing="0" style="background: #fff; border: 1px solid #e9e9e9;">
 497                     <tbody>
 498                     <tr>
 499                         <td bgcolor="#eee" style="padding: 5px 20px 5px 20px; background-color: #eee;">
 500                             <div style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 20px; color: #777; font-weight: bold;">netdata notification</div>
 501                         </td>
 502                     </tr>
 503                     <tr>
 504                         <td bgcolor="${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: ${color};" align="center" valign="top">
 505                             <h1 style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-weight: 400; margin: 0;">${host} ${status_message}</h1>
 506                         </td>
 507                     </tr>
 508                     <tr>
 509                         <td style="vertical-align: top;" valign="top">
 510                             <div style="margin: 0; padding: 20px; max-width: 700px;">
 511                                 <table width="100%" cellpadding="0" cellspacing="0" style="max-width:700px">
 512                                     <tbody>
 513                                     <tr>
 514                                         <td style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 18px; vertical-align: top; margin: 0; padding:0 0 20px;" align="left" valign="top">
 515                                             <span>${chart}</span>
 516                                             <span style="display: block; color: #666666; font-size: 12px; font-weight: 300; line-height: 1; text-transform: uppercase;">Chart</span>
 517                                         </td>
 518                                     </tr>
 519                                     <tr style="margin: 0; padding: 0;">
 520                                         <td style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 18px; vertical-align: top; margin: 0; padding: 0 0 20px;" align="left" valign="top">
 521                                             <span><b>${alarm}</b>${info_html}</span>
 522                                             <span style="display: block; color: #666666; font-size: 12px; font-weight: 300; line-height: 1; text-transform: uppercase;">Alarm</span>
 523                                         </td>
 524                                     </tr>
 525                                     <tr>
 526                                         <td style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 18px; vertical-align: top; margin: 0; padding: 0 0 20px;" align="left" valign="top">
 527                                             <span>${family}</span>
 528                                             <span style="display: block; color: #666666; font-size: 12px; font-weight: 300; line-height: 1; text-transform: uppercase;">Family</span>
 529                                         </td>
 530                                     </tr>
 531                                     <tr style="margin: 0; padding: 0;">
 532                                         <td style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 18px; vertical-align: top; margin: 0; padding: 0 0 20px;" align="left" valign="top">
 533                                             <span>${severity}</span>
 534                                             <span style="display: block; color: #666666; font-size: 12px; font-weight: 300; line-height: 1; text-transform: uppercase;">Severity</span>
 535                                         </td>
 536                                     </tr>
 537                                     <tr style="margin: 0; padding: 0;">
 538                                         <td style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 18px; vertical-align: top; margin: 0; padding: 0 0 20px;" align="left" valign="top"><span>${date}</span>
 539                                             <span>${raised_for_html}</span> <span style="display: block; color: #666666; font-size: 12px; font-weight: 300; line-height: 1; text-transform: uppercase;">Time</span>
 540                                         </td>
 541                                     </tr>
 542                                     <tr style="margin: 0; padding: 0;">
 543                                         <td style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 18px; vertical-align: top; margin: 0; padding: 0 0 20px;">
 544                                             <a href="${goto_url}" style="font-size: 14px; color: #ffffff; text-decoration: none; line-height: 1.5; font-weight: bold; text-align: center; display: inline-block; text-transform: capitalize; background: #35568d; border-width: 1px; border-style: solid; border-color: #2b4c86; margin: 0; padding: 10px 15px;" target="_blank">View Netdata</a>
 545                                         </td>
 546                                     </tr>
 547                                     <tr style="text-align: center; margin: 0; padding: 0;">
 548                                         <td style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 11px; vertical-align: top; margin: 0; padding: 10px 0 0 0; color: #666666;" align="center" valign="bottom">The source of this alarm is line <code>${src}</code>
 549                                         </td>
 550                                     </tr>
 551                                     <tr style="text-align: center; margin: 0; padding: 0;">
 552                                         <td style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; 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
 553                                             <a href="https://mynetdata.io/" target="_blank">netdata</a>, the real-time performance monitoring.
 554                                         </td>
 555                                     </tr>
 556                                     </tbody>
 557                                 </table>
 558                             </div>
 559                         </td>
 560                     </tr>
 561                     </tbody>
 562                 </table>
 563             </div>
 564         </td>
 565     </tr>
 566     </tbody>
 567 </table>
 568 </body>
 569 </html>
 570 EOF
 571
 572 SENT_EMAIL=$?
 573
 574 # -----------------------------------------------------------------------------
 575 # let netdata know
 576
 577 # we did send somehting
 578 [ ${SENT_EMAIL} -eq 0 -o ${SENT_PUSHOVER} -eq 0 -o ${SENT_SLACK} -eq 0 ] && exit 0
 579
 580 # we did not send anything
 581 exit 1