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Merge branch 'netwatch-notify' into next

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Christian Hesse
2021-05-06 15:42:54 +02:00
parent 64ff7fcf65 96621e01cb
commit 254126430e
6 changed files with 50 additions and 5 deletions
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21
doc/netwatch-notify.md
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@ -52,8 +52,29 @@ suppress notification if the parent host is down:
Note that every configured parent in a chain increases the check count
threshould by one.
The host address can be updated dynamically. Give extra parameter `resolve`
with a resolvable name:
/ tool netwatch add comment="notify, hostname=example.com, resolve=example.com";
But be warned: Dynamic updates will probably cause issues if the name has
more than one record in dns - a high rate of configuration changes (and flash
writes) at least.
Also notification settings are required for e-mail and telegram.
Tips & Tricks
-------------
### One of several hosts
Sometimes it is sufficient if one of a number of hosts is available. You can
make `netwatch-notify` check for that by adding several items with same
`hostname`. Note that `count` has to be multiplied to keep the actual time.
/ tool netwatch add comment="notify, hostname=service, count=10" host=10.0.0.10;
/ tool netwatch add comment="notify, hostname=service, count=10" host=10.0.0.20;
---
[◀ Go back to main README](../README.md)
[▲ Go back to top](#top)

2
global-config
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@ -8,7 +8,7 @@
# Make sure all configuration properties are up to date and this
# value is in sync with value in script 'global-functions'!
:global GlobalConfigVersion 49;
:global GlobalConfigVersion 50;
# This is used for DNS and backup file.
:global Domain "example.com";

2
global-config-overlay
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@ -8,7 +8,7 @@
# Make sure all configuration properties are up to date and this
# value is in sync with value in script 'global-functions'!
# Comment or remove to disable news and change notifications.
:global GlobalConfigVersion 49;
:global GlobalConfigVersion 50;
# Copy configuration from global-config here and modify it.

1
global-config.changes
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@ -53,6 +53,7 @@
47="Removed obsolete intermediate certificate 'Let's Encrypt Authority X3' from store.";
48="Added support for overriding e-mail and Telegram settings for every script.";
49="Dropped '\$EmailBackupTo' & '\$EmailBackupCc' from configuration, use settings override if required.";
50="Added support for dynamic address update in 'netwatch-notify'.";
};
# Migration steps to be applied on script updates

2
global-functions
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@ -8,7 +8,7 @@
# https://git.eworm.de/cgit/routeros-scripts/about/
# expected configuration version
:global ExpectedConfigVersion 49;
:global ExpectedConfigVersion 50;
# global variables not to be changed by user
:global GlobalFunctionsReady false;

27
netwatch-notify
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@ -12,6 +12,7 @@
:global NetwatchNotify;
:global DNSIsResolving;
:global IfThenElse;
:global LogPrintExit2;
:global ParseKeyValueStore;
@ -33,10 +34,31 @@
:set $Metric ($NetwatchNotify->$HostName);
}
:if ([ :typeof ($HostInfo->"resolve") ] = "str" && [ $DNSIsResolving ] = true) do={
:do {
:local Resolve [ :resolve ($HostInfo->"resolve") ];
:if ($Resolve != $HostVal->"host") do={
$LogPrintExit2 info $0 ("Name '" . $HostInfo->"resolve" . [ $IfThenElse ($HostInfo->"resolve" != \
$HostInfo->"hostname") ("' for host '" . $HostInfo->"hostname") "" ] . \
"' resolves to different address " . $Resolve . ", updating.") false;
/ tool netwatch set host=$Resolve $Host;
:set ($Metric->"resolve-failed") false;
}
} on-error={
:if ($Metric->"resolve-failed" != true) do={
$LogPrintExit2 warning $0 ("Resolving name '" . $HostInfo->"resolve" . [ $IfThenElse ($HostInfo->"resolve" != \
$HostInfo->"hostname") ("' for host '" . $HostInfo->"hostname") "" ] . "' failed.") false;
:set ($Metric->"resolve-failed") true;
}
}
}
:if ($HostVal->"status" = "up") do={
$LogPrintExit2 debug $0 ("Host " . $HostName . " (" . $HostVal->"host" . ") is up.") false;
:local Count ($Metric->"count");
:set ($Metric->"count") 0;
:if ($Count > 0) do={
$LogPrintExit2 info $0 ("Host " . $HostName . " (" . $HostVal->"host" . ") is up.") false;
:set ($Metric->"count") 0;
}
:if ($Metric->"notified" = true) do={
$SendNotification2 ({ origin=$0; \
subject=([ $SymbolForNotification "white-heavy-check-mark" ] . "Netwatch Notify: " . $HostName . " up"); \
@ -95,5 +117,6 @@
"count"=($Metric->"count");
"notified"=($Metric->"notified");
"parent"=($Metric->"parent");
"resolve-failed"=($Metric->"resolve-failed");
"since"=($Metric->"since") };
}