fix: Warn when newest snapshot is in the future #651
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Option --monitor-snapshots issues a Warning or a Critical when newest snapshot is too old based on the thresholds defined in the Sanoid configuration. However, it reports an _OK_ status when newest snapshot is in the future. This can happen when system time is wrong (in the future) for some time and then returns to normal. In such a situation, this may prevent the creation of new snapshots for a while and so we need to be alerted. Signed-off-by: Nicolas Payart <npayart@gmail.com>
phreaker0
requested changes
Apr 22, 2024
| if (defined $snapsbytype{$path}{$type}{'newest'}) { | ||
| $elapsed = $snapsbytype{$path}{$type}{'newest'}; | ||
| } | ||
| my $dispelapsed = displaytime($elapsed); | ||
| my $dispwarn = displaytime($warn); | ||
| my $dispcrit = displaytime($crit); | ||
| if ( $elapsed > $crit || $elapsed == -1) { | ||
| if ($elapsed > $crit || !defined($elapsed)) { |
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a potential undefined value is compared here and will probably trigger a warning
| @@ -181,6 +181,10 @@ sub monitor_snapshots { | |||
| if (! $config{$section}{'monitor_dont_warn'} && ($errorlevel < 2) ) { $errorlevel = 1; } | |||
| push @msgs, "WARN: $path newest $type snapshot is $dispelapsed old (should be < $dispwarn)"; | |||
| } | |||
| } elsif ($elapsed < 0) { | |||
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a potential undefined value is compared here and will probably trigger a warning
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Description
Option --monitor-snapshots issues a Warning or a Critical when newest snapshot is too old based on the thresholds defined in the Sanoid configuration.
However, it reports an OK status when newest snapshot is in the future. This can happen when system time is wrong (in the future) for some time and then returns to normal. In such a situation, this may prevent the creation of new snapshots for a while and so we need to be alerted.
How to test
On a Linux Debian 10 server:
Open questions