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https://github.com/eworm-de/routeros-scripts
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Merge branch 'netwatch-notify'
This commit is contained in:
commit
34a0d4ab85
6 changed files with 37 additions and 8 deletions
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@ -8,8 +8,9 @@ Description
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This script sends notifications about host UP and DOWN events. In comparison
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to just netwatch (`/ tool netwatch`) and its `up-script` and `down-script`
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this script implements a simple state machine. Host down events are triggered
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only if the host is down for several checks to avoid false alerts.
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this script implements a simple state machine and dependency model. Host
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down events are triggered only if the host is down for several checks and
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optional parent host is not down to avoid false alerts.
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Requirements and installation
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-----------------------------
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@ -39,6 +40,15 @@ The count threshould (default is 5 checks) is configurable as well:
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/ tool netwatch add comment="notify, hostname=example.com, count=10" host=104.18.144.11;
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If the host is behind another checked host add a dependency, this will
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suppress notification if the parent host is down:
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/ tool netwatch add comment="notify, hostname=gateway" host=93.184.216.1;
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/ tool netwatch add comment="notify, hostname=example.com, parent=gateway" host=93.184.216.34;
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Note that every configured parent in a chain increases the check count
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threshould by one.
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Also notification settings are required for e-mail and telegram.
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---
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@ -8,7 +8,7 @@
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# Make sure all configuration properties are up to date and this
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# value is in sync with value in script 'global-functions'!
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:global GlobalConfigVersion 36;
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:global GlobalConfigVersion 37;
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# This is used for DNS and backup file.
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:global Domain "example.com";
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@ -9,7 +9,7 @@
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# Make sure all configuration properties are up to date and this
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# value is in sync with value in script 'global-functions'!
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# Comment or remove to disable change notifications.
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:global GlobalConfigVersion 36;
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:global GlobalConfigVersion 37;
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# Copy configuration from global-config here and modify it.
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@ -40,4 +40,5 @@
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34="Introduced script 'ospf-to-leds' to visualize OSPF instance state via LEDs.";
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35="Implemented visual feedback for 'mode-button' with configurable LED.";
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36="Added support for installing updates automatically if seen in neighbor list.";
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37="Implemented simple dependency model in 'netwatch-notify'.";
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};
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@ -8,7 +8,7 @@
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# https://git.eworm.de/cgit/routeros-scripts/about/
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# expected configuration version
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:global ExpectedConfigVersion 36;
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:global ExpectedConfigVersion 37;
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# global variables not to be changed by user
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:global GlobalFunctionsReady false;
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@ -42,14 +42,31 @@
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}
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}
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:set ($Metric->"notified") false;
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:set ($Metric->"parent") ($HostInfo->"parent");
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:set ($Metric->"since");
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} else={
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:set ($Metric->"count") ($Metric->"count" + 1);
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:set ($Metric->"parent") ($HostInfo->"parent");
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:set ($Metric->"since") ($HostVal->"since");
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:local Count [ $IfThenElse ([ :tonum ($HostInfo->"count") ] > 0) ($HostInfo->"count") 5 ];
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:local Parent ($HostInfo->"parent");
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:while ([ :len $Parent ] > 0) do={
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:set Count ($Count + 1);
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:set Parent ($NetwatchNotify->$Parent->"parent");
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}
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:set Parent ($HostInfo->"parent");
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:local ParentNotified false;
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:while ($ParentNotified = false && [ :len $Parent ] > 0) do={
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:set ParentNotified [ $IfThenElse (($NetwatchNotify->$Parent->"notified") = true) true false ];
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:if ($ParentNotified = false) do={
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:set Parent ($NetwatchNotify->$Parent->"parent");
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}
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}
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$LogPrintExit info ("Host " . $HostName . " (" . $HostVal->"host" . ") is down for " . \
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$Metric->"count" . " checks.") false;
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:if ($Metric->"count" >= [ $IfThenElse ([ :typeof ($HostInfo->"count") ] != "nothing") ($HostInfo->"count") 5 ] && \
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$Metric->"notified" != true) do={
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$Metric->"count" . " checks, " . [ $IfThenElse ($ParentNotified = false) [ $IfThenElse \
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($Metric->"notified" = true) ("already notified.") ($Count - $Metric->"count" . " to go.") ] \
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("parent host " . $Parent . " is down.") ]) false;
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:if ($ParentNotified = false && $Metric->"count" >= $Count && $Metric->"notified" != true) do={
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$SendNotification ([ $SymbolForNotification "cross-mark" ] . "Netwatch Notify: " . $HostName . " down") \
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("Host " . $HostName . " (" . $HostVal->"host" . ") is down since " . $HostVal->"since" . ".");
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:set ($Metric->"notified") true;
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@ -62,5 +79,6 @@
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:set ($NetwatchNotify->$HostName) {
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"count"=($Metric->"count");
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"notified"=($Metric->"notified");
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"parent"=($Metric->"parent");
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"since"=($Metric->"since") };
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}
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