plugins.d/alarm-notify.sh

   1 #!/usr/bin/env bash
   2
   3 # netdata
   4 # real-time performance and health monitoring, done right!
   5 # (C) 2016 Costa Tsaousis <costa@tsaousis.gr>
   6 # GPL v3+
   7 #
   8 # Script the send alarm notifications for netdata
   9 #
  10 # Features:
  11 #  - multiple notification methods
  12 #  - multiple roles per alarm
  13 #  - multiple recipients per role
  14 #  - severity filtering per recipient
  15 #
  16 # Supported notification methods:
  17 #  - emails
  18 #  - pushover.net notifications
  19 #  - slack.com notifications
  20 #  - telegram.org notifications
  21 #
  22
  23 me="${0}"
  24
  25 # check for BASH v4+ (required for associative arrays)
  26 [ $(( ${BASH_VERSINFO[0]} )) -lt 4 ] && \
  27     echo >&2 "${me}: BASH version 4 or later is required (this is ${BASH_VERSION})." && \
  28     exit 1
  29
  30 # defaults to allow running this script by hand
  31 NETDATA_CONFIG_DIR="${NETDATA_CONFIG_DIR-/etc/netdata}"
  32 NETDATA_CACHE_DIR="${NETDATA_CACHE_DIR-/var/cache/netdata}"
  33 [ -z "${NETDATA_REGISTRY_URL}" ] && NETDATA_REGISTRY_URL="https://registry.my-netdata.io"
  34 [ -z "${NETDATA_HOSTNAME}" ] && NETDATA_HOSTNAME="$(hostname)"
  35 [ -z "${NETDATA_REGISTRY_HOSTNAME}" ] && NETDATA_REGISTRY_HOSTNAME="${NETDATA_HOSTNAME}"
  36
  37 # -----------------------------------------------------------------------------
  38 # parse command line parameters
  39
  40 roles="${1}"       # the roles that should be notified for this event
  41 host="${2}"        # the host generated this event
  42 unique_id="${3}"   # the unique id of this event
  43 alarm_id="${4}"    # the unique id of the alarm that generated this event
  44 event_id="${5}"    # the incremental id of the event, for this alarm id
  45 when="${6}"        # the timestamp this event occurred
  46 name="${7}"        # the name of the alarm, as given in netdata health.d entries
  47 chart="${8}"       # the name of the chart (type.id)
  48 family="${9}"      # the family of the chart
  49 status="${10}"     # the current status : REMOVED, UNITIALIZED, UNDEFINED, CLEAR, WARNING, CRITICAL
  50 old_status="${11}" # the previous status: REMOVED, UNITIALIZED, UNDEFINED, CLEAR, WARNING, CRITICAL
  51 value="${12}"      # the current value of the alarm
  52 old_value="${13}"  # the previous value of the alarm
  53 src="${14}"        # the line number and file the alarm has been configured
  54 duration="${15}"   # the duration in seconds of the previous alarm state
  55 non_clear_duration="${16}" # the total duration in seconds this is/was non-clear
  56 units="${17}"      # the units of the value
  57 info="${18}"       # a short description of the alarm
  58
  59 # -----------------------------------------------------------------------------
  60 # screen statuses we don't need to send a notification
  61
  62 # don't do anything if this is not WARNING, CRITICAL or CLEAR
  63 if [ "${status}" != "WARNING" -a "${status}" != "CRITICAL" -a "${status}" != "CLEAR" ]
  64 then
  65     echo >&2 "${me}: not sending notification for ${status} on '${chart}.${name}'"
  66     exit 1
  67 fi
  68
  69 # don't do anything if this is CLEAR, but it was not WARNING or CRITICAL
  70 if [ "${old_status}" != "WARNING" -a "${old_status}" != "CRITICAL" -a "${status}" = "CLEAR" ]
  71 then
  72     echo >&2 "${me}: not sending notification for ${status} on '${chart}.${name}' (last status was ${old_status})"
  73     exit 1
  74 fi
  75
  76 # -----------------------------------------------------------------------------
  77 # load configuration
  78
  79 # By default fetch images from the global public registry.
  80 # This is required by default, since all notification methods need to download
  81 # images via the Internet, and private registries might not be reachable.
  82 # This can be overwritten at the configuration file.
  83 images_base_url="https://registry.my-netdata.io"
  84
  85 # needed commands
  86 # if empty they will be searched in the system path
  87 curl=
  88 sendmail=
  89
  90 # enable / disable features
  91 SEND_SLACK="YES"
  92 SEND_PUSHOVER="YES"
  93 SEND_TELEGRAM="YES"
  94 SEND_EMAIL="YES"
  95 SEND_PUSHBULLET="YES"
  96
  97 # slack configs
  98 SLACK_WEBHOOK_URL=
  99 DEFAULT_RECIPIENT_SLACK=
 100 declare -A role_recipients_slack=()
 101
 102 # pushover configs
 103 PUSHOVER_APP_TOKEN=
 104 DEFAULT_RECIPIENT_PUSHOVER=
 105 declare -A role_recipients_pushover=()
 106
 107 # pushbullet configs
 108 DEFAULT_RECIPIENT_PUSHBULLET=
 109 declare -A role_recipients_pushbullet=()
 110
 111 # telegram configs
 112 TELEGRAM_BOT_TOKEN=
 113 DEFAULT_RECIPIENT_TELEGRAM=
 114 declare -A role_recipients_telegram=()
 115
 116 # email configs
 117 DEFAULT_RECIPIENT_EMAIL="root"
 118 declare -A role_recipients_email=()
 119
 120 # load the user configuration
 121 # this will overwrite the variables above
 122 if [ -f "${NETDATA_CONFIG_DIR}/health_alarm_notify.conf" ]
 123     then
 124     source "${NETDATA_CONFIG_DIR}/health_alarm_notify.conf"
 125 fi
 126
 127 # -----------------------------------------------------------------------------
 128 # filter a recipient based on alarm event severity
 129
 130 filter_recipient_by_criticality() {
 131     local method="${1}" x="${2}" r s
 132     shift
 133
 134     r="${x/|*/}" # the recipient
 135     s="${x/*|/}" # the severity required for notifying this recipient
 136
 137     # no severity filtering for this person
 138     [ "${r}" = "${s}" ] && return 0
 139
 140     # the severity is invalid
 141     s="${s^^}"
 142     [ "${s}" != "CRITICAL" ] && return 0
 143
 144     # the new or the old status matches the severity
 145     if [ "${s}" = "${status}" -o "${s}" = "${old_status}" ]
 146         then
 147         [ ! -d "${NETDATA_CACHE_DIR}/alarm-notify/${method}/${r}" ] && \
 148             mkdir -p "${NETDATA_CACHE_DIR}/alarm-notify/${method}/${r}"
 149
 150         # we need to keep track of the notifications we sent
 151         # so that the same user will receive the recovery
 152         # even if old_status does not match the required severity
 153         touch "${NETDATA_CACHE_DIR}/alarm-notify/${method}/${r}/${alarm_id}"
 154         return 0
 155     fi
 156
 157     # it is a cleared alarm we have sent notification for
 158     if [ "${status}" != "WARNING" -a "${status}" != "CRITICAL" -a -f "${NETDATA_CACHE_DIR}/alarm-notify/${method}/${r}/${alarm_id}" ]
 159         then
 160         rm "${NETDATA_CACHE_DIR}/alarm-notify/${method}/${r}/${alarm_id}"
 161         return 0
 162     fi
 163
 164     return 1
 165 }
 166
 167 # -----------------------------------------------------------------------------
 168 # find the recipients' addresses per method
 169
 170 declare -A arr_slack=()
 171 declare -A arr_pushover=()
 172 declare -A arr_pushbullet=()
 173 declare -A arr_telegram=()
 174 declare -A arr_email=()
 175
 176 # netdata may call us with multiple roles, and roles may have multiple but
 177 # overlapping recipients - so, here we find the unique recipients.
 178 for x in ${roles//,/ }
 179 do
 180     # the roles 'silent' and 'disabled' mean:
 181     # don't send a notification for this role
 182     [ "${x}" = "silent" -o "${x}" = "disabled" ] && continue
 183
 184     # email
 185     a="${role_recipients_email[${x}]}"
 186     [ -z "${a}" ] && a="${DEFAULT_RECIPIENT_EMAIL}"
 187     for r in ${a//,/ }
 188     do
 189         [ "${r}" != "disabled" ] && filter_recipient_by_criticality email "${r}" && arr_email[${r/|*/}]="1"
 190     done
 191
 192     # pushover
 193     a="${role_recipients_pushover[${x}]}"
 194     [ -z "${a}" ] && a="${DEFAULT_RECIPIENT_PUSHOVER}"
 195     for r in ${a//,/ }
 196     do
 197         [ "${r}" != "disabled" ] && filter_recipient_by_criticality pushover "${r}" && arr_pushover[${r/|*/}]="1"
 198     done
 199
 200     # pushover
 201     a="${role_recipients_pushbullet[${x}]}"
 202     [ -z "${a}" ] && a="${DEFAULT_RECIPIENT_PUSHBULLET}"
 203     for r in ${a//,/ }
 204     do
 205         [ "${r}" != "disabled" ] && filter_recipient_by_criticality pushbullet "${r}" && arr_pushbullet[${r/|*/}]="1"
 206     done
 207
 208     # telegram
 209     a="${role_recipients_telegram[${x}]}"
 210     [ -z "${a}" ] && a="${DEFAULT_RECIPIENT_TELEGRAM}"
 211     for r in ${a//,/ }
 212     do
 213         [ "${r}" != "disabled" ] && filter_recipient_by_criticality telegram "${r}" && arr_telegram[${r/|*/}]="1"
 214     done
 215
 216     # slack
 217     a="${role_recipients_slack[${x}]}"
 218     [ -z "${a}" ] && a="${DEFAULT_RECIPIENT_SLACK}"
 219     for r in ${a//,/ }
 220     do
 221         [ "${r}" != "disabled" ] && filter_recipient_by_criticality slack "${r}" && arr_slack[${r/|*/}]="1"
 222     done
 223 done
 224
 225 # build the list of slack recipients (channels)
 226 to_slack="${!arr_slack[*]}"
 227 [ -z "${to_slack}" ] && SEND_SLACK="NO"
 228
 229 # build the list of pushover recipients (user tokens)
 230 to_pushover="${!arr_pushover[*]}"
 231 [ -z "${to_pushover}" ] && SEND_PUSHOVER="NO"
 232
 233 # build the list of pushbulet recipients (user tokens)
 234 to_pushbullet="${!arr_pushbullet[*]}"
 235 [ -z "${to_pushbullet}" ] && SEND_PUSHBULLET="NO"
 236
 237 # check array of telegram recipients (chat ids)
 238 to_telegram="${!arr_telegram[*]}"
 239 [ -z "${to_telegram}" ] && SEND_TELEGRAM="NO"
 240
 241 # build the list of email recipients (email addresses)
 242 to_email=
 243 for x in "${!arr_email[@]}"
 244 do
 245     [ ! -z "${to_email}" ] && to_email="${to_email}, "
 246     to_email="${to_email}${x}"
 247 done
 248 [ -z "${to_email}" ] && SEND_EMAIL="NO"
 249
 250
 251 # -----------------------------------------------------------------------------
 252 # verify the delivery methods supported
 253
 254 # check slack
 255 [ -z "${SLACK_WEBHOOK_URL}" ] && SEND_SLACK="NO"
 256
 257 # check pushover
 258 [ -z "${PUSHOVER_APP_TOKEN}" ] && SEND_PUSHOVER="NO"
 259
 260 # check pushbullet
 261 [ -z "${DEFAULT_RECIPIENT_PUSHBULLET}" ] && SEND_PUSHBULLET="NO"
 262
 263 # check telegram
 264 [ -z "${TELEGRAM_BOT_TOKEN}" ] && SEND_TELEGRAM="NO"
 265
 266 if [ \( "${SEND_PUSHOVER}" = "YES" -o "${SEND_SLACK}" = "YES" -o "${SEND_TELEGRAM}" = "YES" -o "${SEND_PUSHBULLET}" = "YES" \) -a -z "${curl}" ]
 267     then
 268     curl="$(which curl 2>/dev/null || command -v curl 2>/dev/null)"
 269     if [ -z "${curl}" ]
 270         then
 271         SEND_PUSHOVER="NO"
 272         SEND_PUSHBULLET="NO"
 273         SEND_TELEGRAM="NO"
 274         SEND_SLACK="NO"
 275     fi
 276 fi
 277
 278 if [ "${SEND_EMAIL}" = "YES" -a -z "${sendmail}" ]
 279     then
 280     sendmail="$(which sendmail 2>/dev/null || command -v sendmail 2>/dev/null)"
 281     [ -z "${sendmail}" ] && SEND_EMAIL="NO"
 282 fi
 283
 284 # check that we have at least a method enabled
 285 if [ "${SEND_EMAIL}" != "YES" -a "${SEND_PUSHOVER}" != "YES" -a "${SEND_TELEGRAM}" != "YES" -a "${SEND_SLACK}" != "YES" -a "${SEND_PUSHBULLET}" != "YES" ]
 286     then
 287     echo >&2 "All notification methods are disabled. Not sending a notification."
 288     exit 1
 289 fi
 290
 291 # -----------------------------------------------------------------------------
 292 # get the system hostname
 293
 294 [ -z "${host}" ] && host="${NETDATA_HOSTNAME}"
 295 [ -z "${host}" ] && host="${NETDATA_REGISTRY_HOSTNAME}"
 296 [ -z "${host}" ] && host="$(hostname 2>/dev/null)"
 297
 298 # -----------------------------------------------------------------------------
 299 # get the date the alarm happened
 300
 301 date="$(date --date=@${when} 2>/dev/null)"
 302 [ -z "${date}" ] && date="$(date 2>/dev/null)"
 303
 304 # -----------------------------------------------------------------------------
 305 # URL encode a string
 306
 307 urlencode() {
 308     local string="${1}" strlen encoded pos c o
 309
 310     strlen=${#string}
 311     for (( pos=0 ; pos<strlen ; pos++ ))
 312     do
 313         c=${string:$pos:1}
 314         case "$c" in
 315             [-_.~a-zA-Z0-9])
 316                 o="${c}"
 317                 ;;
 318
 319             *)
 320                 printf -v o '%%%02x' "'$c"
 321                 ;;
 322         esac
 323         encoded+="${o}"
 324     done
 325
 326     REPLY="${encoded}"
 327     echo "${REPLY}"
 328 }
 329
 330 # -----------------------------------------------------------------------------
 331 # convert a duration in seconds, to a human readable duration
 332 # using DAYS, MINUTES, SECONDS
 333
 334 duration4human() {
 335     local s="${1}" d=0 h=0 m=0 ds="day" hs="hour" ms="minute" ss="second" ret
 336     d=$(( s / 86400 ))
 337     s=$(( s - (d * 86400) ))
 338     h=$(( s / 3600 ))
 339     s=$(( s - (h * 3600) ))
 340     m=$(( s / 60 ))
 341     s=$(( s - (m * 60) ))
 342
 343     if [ ${d} -gt 0 ]
 344     then
 345         [ ${m} -ge 30 ] && h=$(( h + 1 ))
 346         [ ${d} -gt 1 ] && ds="days"
 347         [ ${h} -gt 1 ] && hs="hours"
 348         if [ ${h} -gt 0 ]
 349         then
 350             ret="${d} ${ds} and ${h} ${hs}"
 351         else
 352             ret="${d} ${ds}"
 353         fi
 354     elif [ ${h} -gt 0 ]
 355     then
 356         [ ${s} -ge 30 ] && m=$(( m + 1 ))
 357         [ ${h} -gt 1 ] && hs="hours"
 358         [ ${m} -gt 1 ] && ms="minutes"
 359         if [ ${m} -gt 0 ]
 360         then
 361             ret="${h} ${hs} and ${m} ${ms}"
 362         else
 363             ret="${h} ${hs}"
 364         fi
 365     elif [ ${m} -gt 0 ]
 366     then
 367         [ ${m} -gt 1 ] && ms="minutes"
 368         [ ${s} -gt 1 ] && ss="seconds"
 369         if [ ${s} -gt 0 ]
 370         then
 371             ret="${m} ${ms} and ${s} ${ss}"
 372         else
 373             ret="${m} ${ms}"
 374         fi
 375     else
 376         [ ${s} -gt 1 ] && ss="seconds"
 377         ret="${s} ${ss}"
 378     fi
 379
 380     REPLY="${ret}"
 381     echo "${REPLY}"
 382 }
 383
 384 # -----------------------------------------------------------------------------
 385 # email sender
 386
 387 send_email() {
 388     local ret=
 389     if [ "${SEND_EMAIL}" = "YES" ]
 390         then
 391
 392         "${sendmail}" -t
 393         ret=$?
 394
 395         if [ $ret -eq 0 ]
 396         then
 397             echo >&2 "${me}: Sent email notification for: ${host} ${chart}.${name} is ${status} to '${to_email}'"
 398             return 0
 399         else
 400             echo >&2 "${me}: Failed to send email notification for: ${host} ${chart}.${name} is ${status} to '${to_email}' with error code ${ret}."
 401             return 1
 402         fi
 403     fi
 404
 405     return 1
 406 }
 407
 408 # -----------------------------------------------------------------------------
 409 # pushover sender
 410
 411 send_pushover() {
 412     local apptoken="${1}" usertokens="${2}" when="${3}" url="${4}" status="${5}" title="${6}" message="${7}" httpcode sent=0 user priority
 413
 414     if [ "${SEND_PUSHOVER}" = "YES" -a ! -z "${apptoken}" -a ! -z "${usertokens}" -a ! -z "${title}" -a ! -z "${message}" ]
 415         then
 416
 417         # https://pushover.net/api
 418         priority=-2
 419         case "${status}" in
 420             CLEAR) priority=-1;;   # low priority: no sound or vibration
 421             WARNING) priotity=0;;  # normal priority: respect quiet hours
 422             CRITICAL) priority=1;; # high priority: bypass quiet hours
 423             *) priority=-2;;       # lowest priority: no notification at all
 424         esac
 425
 426         for user in ${usertokens}
 427         do
 428             httpcode=$(${curl} --write-out %{http_code} --silent --output /dev/null \
 429                 --form-string "token=${apptoken}" \
 430                 --form-string "user=${user}" \
 431                 --form-string "html=1" \
 432                 --form-string "title=${title}" \
 433                 --form-string "message=${message}" \
 434                 --form-string "timestamp=${when}" \
 435                 --form-string "url=${url}" \
 436                 --form-string "url_title=Open netdata dashboard to view the alarm" \
 437                 --form-string "priority=${priority}" \
 438                 https://api.pushover.net/1/messages.json)
 439
 440             if [ "${httpcode}" == "200" ]
 441             then
 442                 echo >&2 "${me}: Sent pushover notification for: ${host} ${chart}.${name} is ${status} to '${user}'"
 443                 sent=$((sent + 1))
 444             else
 445                 echo >&2 "${me}: Failed to send pushover notification for: ${host} ${chart}.${name} is ${status} to '${user}' with HTTP error code ${httpcode}."
 446             fi
 447         done
 448
 449         [ ${sent} -gt 0 ] && return 0
 450     fi
 451
 452     return 1
 453 }
 454
 455 # -----------------------------------------------------------------------------
 456 # pushbullet sender
 457
 458 send_pushbullet() {
 459     local userapikeys="${1}" message="${2}" title="${3}"  httpcode sent=0 user priority
 460
 461     if [ "${SEND_PUSHBULLET}" = "YES" -a ! -z "${userapikeys}" -a ! -z "${message}" -a ! -z "${title}" ]
 462         then
 463         #https://docs.pushbullet.com/#create-push        priority=-2
 464         for user in ${userapikeys}
 465         do
 466             httpcode=$(${curl} --write-out %{http_code} --silent --output /dev/null \
 467                  -u ""$user"": \
 468                  -d type="note" \
 469                  --data-urlencode body="${message}" \
 470                  --data-urlencode title="${title}" \
 471                  "https://api.pushbullet.com/v2/pushes"
 472                 )
 473             if [ "${httpcode}" == "200" ]
 474             then
 475                 echo >&2 "${me}: Sent pushbullet notification for: ${host} ${chart}.${name} is ${status} to '${user}'"
 476                 sent=$((sent + 1))
 477             else
 478                 echo >&2 "${me}: Failed to send pushbullet notification for: ${host} ${chart}.${name} is ${status} to '${user}' with HTTP error code ${httpcode}."
 479             fi
 480         done
 481
 482         [ ${sent} -gt 0 ] && return 0
 483     fi
 484
 485     return 1
 486 }
 487
 488
 489
 490 # -----------------------------------------------------------------------------
 491 # telegram sender
 492
 493 send_telegram() {
 494     local bottoken="${1}" chatids="${2}" message="${3}" httpcode sent=0 chatid disableNotification=""
 495
 496     if [ "${status}" = "CLEAR" ]; then disableNotification="--data-urlencode disable_notification=true"; fi
 497
 498     if [ "${SEND_TELEGRAM}" = "YES" -a ! -z "${bottoken}" -a ! -z "${chatids}" -a ! -z "${message}" ];
 499     then
 500         for chatid in ${chatids}
 501         do
 502             # https://core.telegram.org/bots/api#sendmessage
 503             httpcode=$(${curl} --write-out %{http_code} --silent --output /dev/null ${disableNotification} \
 504                 --data-urlencode "parse_mode=HTML" \
 505                 --data-urlencode "disable_web_page_preview=true" \
 506                 --data-urlencode "text=$message" \
 507                 "https://api.telegram.org/bot${bottoken}/sendMessage?chat_id=$chatid")
 508
 509             if [ "${httpcode}" == "200" ]
 510             then
 511                 echo >&2 "${me}: Sent telegram notification for: ${host} ${chart}.${name} is ${status} to '${chatid}'"
 512                 sent=$((sent + 1))
 513             elif [ "${httpcode}" == "401" ]
 514             then
 515                 echo >&2 "${me}: Failed to send telegram notification for: ${host} ${chart}.${name} is ${status} to '${chatid}': Wrong bot token."
 516             else
 517                 echo >&2 "${me}: Failed to send telegram notification for: ${host} ${chart}.${name} is ${status} to '${chatid}' with HTTP error code ${httpcode}."
 518             fi
 519         done
 520
 521         [ ${sent} -gt 0 ] && return 0
 522     fi
 523
 524     return 1
 525 }
 526
 527 # -----------------------------------------------------------------------------
 528 # slack sender
 529
 530 send_slack() {
 531     local webhook="${1}" channels="${2}" httpcode sent=0 channel color payload
 532
 533     [ "${SEND_SLACK}" != "YES" ] && return 1
 534
 535     case "${status}" in
 536         WARNING) color="warning" ;;
 537         CRITICAL) color="danger" ;;
 538         CLEAR) color="good" ;;
 539         *) color="#777777" ;;
 540     esac
 541
 542     for channel in ${channels}
 543     do
 544         payload="$(cat <<EOF
 545         {
 546             "channel": "#${channel}",
 547             "username": "netdata on ${host}",
 548             "icon_url": "${images_base_url}/images/seo-performance-128.png",
 549             "text": "${host} ${status_message}, \`${chart}\` (_${family}_), *${alarm}*",
 550             "attachments": [
 551                 {
 552                     "fallback": "${alarm} - ${chart} (${family}) - ${info}",
 553                     "color": "${color}",
 554                     "title": "${alarm}",
 555                     "title_link": "${goto_url}",
 556                     "text": "${info}",
 557                     "fields": [
 558                         {
 559                             "title": "${chart}",
 560                             "short": true
 561                         },
 562                         {
 563                             "title": "${family}",
 564                             "short": true
 565                         }
 566                     ],
 567                     "thumb_url": "${image}",
 568                     "footer": "<${goto_url}|${host}>",
 569                     "ts": ${when}
 570                 }
 571             ]
 572         }
 573 EOF
 574         )"
 575
 576         httpcode=$(${curl} --write-out %{http_code} --silent --output /dev/null -X POST --data-urlencode "payload=${payload}" "${webhook}")
 577         if [ "${httpcode}" == "200" ]
 578         then
 579             echo >&2 "${me}: Sent slack notification for: ${host} ${chart}.${name} is ${status} to '${channel}'"
 580             sent=$((sent + 1))
 581         else
 582             echo >&2 "${me}: Failed to send slack notification for: ${host} ${chart}.${name} is ${status} to '${channel}', with HTTP error code ${httpcode}."
 583         fi
 584     done
 585
 586     [ ${sent} -gt 0 ] && return 0
 587
 588     return 1
 589 }
 590
 591
 592 # -----------------------------------------------------------------------------
 593 # prepare the content of the notification
 594
 595 # the url to send the user on click
 596 urlencode "${NETDATA_REGISTRY_HOSTNAME}" >/dev/null; url_host="${REPLY}"
 597 urlencode "${chart}" >/dev/null; url_chart="${REPLY}"
 598 urlencode "${family}" >/dev/null; url_family="${REPLY}"
 599 urlencode "${name}" >/dev/null; url_name="${REPLY}"
 600 goto_url="${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=${event_id}"
 601
 602 # the severity of the alarm
 603 severity="${status}"
 604
 605 # the time the alarm was raised
 606 duration4human ${duration} >/dev/null; duration_txt="${REPLY}"
 607 duration4human ${non_clear_duration} >/dev/null; non_clear_duration_txt="${REPLY}"
 608 raised_for="(was ${old_status,,} for ${duration_txt})"
 609
 610 # the key status message
 611 status_message="status unknown"
 612
 613 # the color of the alarm
 614 color="grey"
 615
 616 # the alarm value
 617 alarm="${name//_/ } = ${value} ${units}"
 618
 619 # the image of the alarm
 620 image="${images_base_url}/images/seo-performance-128.png"
 621
 622 # prepare the title based on status
 623 case "${status}" in
 624         CRITICAL)
 625         image="${images_base_url}/images/alert-128-red.png"
 626         status_message="is critical"
 627         color="#ca414b"
 628         ;;
 629
 630     WARNING)
 631         image="${images_base_url}/images/alert-128-orange.png"
 632         status_message="needs attention"
 633         color="#caca4b"
 634                 ;;
 635
 636         CLEAR)
 637         image="${images_base_url}/images/check-mark-2-128-green.png"
 638         status_message="recovered"
 639                 color="#77ca6d"
 640
 641                 # don't show the value when the status is CLEAR
 642                 # for certain alarms, this value might not have any meaning
 643                 alarm="${name//_/ } ${raised_for}"
 644                 ;;
 645 esac
 646
 647 if [ "${status}" = "CLEAR" ]
 648 then
 649     severity="Recovered from ${old_status}"
 650     if [ $non_clear_duration -gt $duration ]
 651     then
 652         raised_for="(alarm was raised for ${non_clear_duration_txt})"
 653     fi
 654
 655 elif [ "${old_status}" = "WARNING" -a "${status}" = "CRITICAL" ]
 656 then
 657     severity="Escalated to ${status}"
 658     if [ $non_clear_duration -gt $duration ]
 659     then
 660         raised_for="(alarm is raised for ${non_clear_duration_txt})"
 661     fi
 662
 663 elif [ "${old_status}" = "CRITICAL" -a "${status}" = "WARNING" ]
 664 then
 665     severity="Demoted to ${status}"
 666     if [ $non_clear_duration -gt $duration ]
 667     then
 668         raised_for="(alarm is raised for ${non_clear_duration_txt})"
 669     fi
 670
 671 else
 672     raised_for=
 673 fi
 674
 675 # prepare HTML versions of elements
 676 info_html=
 677 [ ! -z "${info}" ] && info_html=" <small><br/>${info}</small>"
 678
 679 raised_for_html=
 680 [ ! -z "${raised_for}" ] && raised_for_html="<br/><small>${raised_for}</small>"
 681
 682 # -----------------------------------------------------------------------------
 683 # send the slack notification
 684
 685 # slack aggregates posts from the same username
 686 # so we use "${host} ${status}" as the bot username, to make them diff
 687
 688 send_slack "${SLACK_WEBHOOK_URL}" "${to_slack}"
 689 SENT_SLACK=$?
 690
 691 # -----------------------------------------------------------------------------
 692 # send the pushover notification
 693
 694 send_pushover "${PUSHOVER_APP_TOKEN}" "${to_pushover}" "${when}" "${goto_url}" "${status}" "${host} ${status_message} - ${name//_/ } - ${chart}" "
 695 <font color=\"${color}\"><b>${alarm}</b></font>${info_html}<br/>&nbsp;
 696 <small><b>${chart}</b><br/>Chart<br/>&nbsp;</small>
 697 <small><b>${family}</b><br/>Family<br/>&nbsp;</small>
 698 <small><b>${severity}</b><br/>Severity<br/>&nbsp;</small>
 699 <small><b>${date}${raised_for_html}</b><br/>Time<br/>&nbsp;</small>
 700 <a href=\"${goto_url}\">View Netdata</a><br/>&nbsp;
 701 <small><small>The source of this alarm is line ${src}</small></small>
 702 "
 703
 704 SENT_PUSHOVER=$?
 705
 706 # -----------------------------------------------------------------------------
 707 # send the pushbullet notification
 708
 709 pushbullet_message="
 710 ${alarm}
 711 Severity: ${severity}
 712 Chart: ${chart}
 713 Family: ${family}
 714 To view NetData: ${goto_url}
 715 The source of this alarm is line ${src}"
 716 pushbullet_title="${status} at ${host} ${status_message} - ${name//_/ } - ${chart}}"
 717 send_pushbullet "${DEFAULT_RECIPIENT_PUSHBULLET}" "$pushbullet_message" "$pushbullet_title"
 718
 719 SENT_PUSHBULLET=$?
 720
 721 # -----------------------------------------------------------------------------
 722 # send the telegram.org message
 723
 724 # https://core.telegram.org/bots/api#formatting-options
 725 telegram_message="<b>${severity}"
 726 [ "${status_message}" != "recovered" ] && telegram_message="${telegram_message}, ${status_message}"
 727 telegram_message="${telegram_message}
 728 ${chart} (${family})</b>
 729 <a href=\"${goto_url}\">${alarm}</a>
 730 <i>${info}</i>"
 731
 732 send_telegram "${TELEGRAM_BOT_TOKEN}" "${to_telegram}" "${telegram_message}"
 733
 734 SENT_TELEGRAM=$?
 735
 736 # -----------------------------------------------------------------------------
 737 # send the email
 738
 739 send_email <<EOF
 740 To: ${to_email}
 741 Subject: ${host} ${status_message} - ${name//_/ } - ${chart}
 742 Content-Type: text/html
 743
 744 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 745 <html xmlns="http://www.w3.org/1999/xhtml" style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; box-sizing: border-box; font-size: 14px; margin: 0; padding: 0;">
 746 <body style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 14px; width: 100% !important; min-height: 100%; line-height: 1.6; background: #f6f6f6; margin:0; padding: 0;">
 747 <table>
 748     <tbody>
 749     <tr>
 750         <td style="vertical-align: top;" valign="top"></td>
 751         <td width="700" style="vertical-align: top; display: block !important; max-width: 700px !important; clear: both !important; margin: 0 auto; padding: 0;" valign="top">
 752             <div style="max-width: 700px; display: block; margin: 0 auto; padding: 20px;">
 753                 <table width="100%" cellpadding="0" cellspacing="0" style="background: #fff; border: 1px solid #e9e9e9;">
 754                     <tbody>
 755                     <tr>
 756                         <td bgcolor="#eee" style="padding: 5px 20px 5px 20px; background-color: #eee;">
 757                             <div style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 20px; color: #777; font-weight: bold;">netdata notification</div>
 758                         </td>
 759                     </tr>
 760                     <tr>
 761                         <td bgcolor="${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: ${color};" align="center" valign="top">
 762                             <h1 style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-weight: 400; margin: 0;">${host} ${status_message}</h1>
 763                         </td>
 764                     </tr>
 765                     <tr>
 766                         <td style="vertical-align: top;" valign="top">
 767                             <div style="margin: 0; padding: 20px; max-width: 700px;">
 768                                 <table width="100%" cellpadding="0" cellspacing="0" style="max-width:700px">
 769                                     <tbody>
 770                                     <tr>
 771                                         <td style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 18px; vertical-align: top; margin: 0; padding:0 0 20px;" align="left" valign="top">
 772                                             <span>${chart}</span>
 773                                             <span style="display: block; color: #666666; font-size: 12px; font-weight: 300; line-height: 1; text-transform: uppercase;">Chart</span>
 774                                         </td>
 775                                     </tr>
 776                                     <tr style="margin: 0; padding: 0;">
 777                                         <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">
 778                                             <span><b>${alarm}</b>${info_html}</span>
 779                                             <span style="display: block; color: #666666; font-size: 12px; font-weight: 300; line-height: 1; text-transform: uppercase;">Alarm</span>
 780                                         </td>
 781                                     </tr>
 782                                     <tr>
 783                                         <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">
 784                                             <span>${family}</span>
 785                                             <span style="display: block; color: #666666; font-size: 12px; font-weight: 300; line-height: 1; text-transform: uppercase;">Family</span>
 786                                         </td>
 787                                     </tr>
 788                                     <tr style="margin: 0; padding: 0;">
 789                                         <td style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 18px; vertical-align: top; margin: 0; padding: 0 0 20px;" align="left" valign="top">
 790                                             <span>${severity}</span>
 791                                             <span style="display: block; color: #666666; font-size: 12px; font-weight: 300; line-height: 1; text-transform: uppercase;">Severity</span>
 792                                         </td>
 793                                     </tr>
 794                                     <tr style="margin: 0; padding: 0;">
 795                                         <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>${date}</span>
 796                                             <span>${raised_for_html}</span> <span style="display: block; color: #666666; font-size: 12px; font-weight: 300; line-height: 1; text-transform: uppercase;">Time</span>
 797                                         </td>
 798                                     </tr>
 799                                     <tr style="margin: 0; padding: 0;">
 800                                         <td style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 18px; vertical-align: top; margin: 0; padding: 0 0 20px;">
 801                                             <a href="${goto_url}" style="font-size: 14px; color: #ffffff; text-decoration: none; line-height: 1.5; font-weight: bold; text-align: center; display: inline-block; text-transform: capitalize; background: #35568d; border-width: 1px; border-style: solid; border-color: #2b4c86; margin: 0; padding: 10px 15px;" target="_blank">View Netdata</a>
 802                                         </td>
 803                                     </tr>
 804                                     <tr style="text-align: center; margin: 0; padding: 0;">
 805                                         <td style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 11px; vertical-align: top; margin: 0; padding: 10px 0 0 0; color: #666666;" align="center" valign="bottom">The source of this alarm is line <code>${src}</code>
 806                                         </td>
 807                                     </tr>
 808                                     <tr style="text-align: center; margin: 0; padding: 0;">
 809                                         <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
 810                                             <a href="https://mynetdata.io/" target="_blank">netdata</a>, the real-time performance monitoring.
 811                                         </td>
 812                                     </tr>
 813                                     </tbody>
 814                                 </table>
 815                             </div>
 816                         </td>
 817                     </tr>
 818                     </tbody>
 819                 </table>
 820             </div>
 821         </td>
 822     </tr>
 823     </tbody>
 824 </table>
 825 </body>
 826 </html>
 827 EOF
 828
 829 SENT_EMAIL=$?
 830
 831 # -----------------------------------------------------------------------------
 832 # let netdata know
 833
 834 # we did send something
 835 [ ${SENT_EMAIL} -eq 0 -o ${SENT_PUSHOVER} -eq 0 -o ${SENT_TELEGRAM} -eq 0 -o ${SENT_SLACK} -eq 0 ] && exit 0
 836
 837 # we did not send anything
 838 exit 1