Nagios is an awesome monitoring-tool. I give my best to check as much services as possible with nagios. Here I want to explain how I check if updates for the Horde-Framework exist…
Although horde uses pear for update-management I don’t want to check pear directly(because of permissions and of course I don’t want to create too much traffic on the horde-repository). That’s why i use the following cronjob which checks for upgrades once an hour:
45 * * * * pear list-upgrades > /var/log/pear_check_updates.log
Now this nagios-check(check_pear_updates.pl) can use this information:
#!/usr/bin/perl
###########################################################################
#
# you need a cronjob with this command:
# pear list-upgrades > /var/log/pear_check_updates.log
#
##########################################################################
my $pearchannel = 'Waynes World! Waynes World! Party time! Excellent!';
my @logarr = undef;
my $found = 0;
my $checkother = 0;
my $available_upgrades = 0;
my $ret = 2;
if($#ARGV < 0)
{
print "usage: $0 []\n";
exit 3;
}
my $pearlog = $ARGV[0];
$pearchannel = $ARGV[1] if($#ARGV > 0);
unless(open(PEARLOG,"< $pearlog"))
{
print "Error: can not open logfile: $pearlog\n";
exit 3;
}
while()
{
my $tmp = $_;
$available_upgrades++ if($tmp =~ /AVAILABLE UPGRADES/);
if($tmp =~ /^Channel $pearchannel/)
{
print $tmp;
}
else
{
my @tmparr = split(/\s+/,$tmp);
if($tmparr[0] eq $pearchannel)
{
print "$tmparr[1] $tmparr[2] $tmparr[3] $tmparr[4] $tmparr[5] $tmparr[6],";
$found = 1;
}
}
push(@logarr,$tmp);
}
close(PEARLOG);
exit $ret if($found == 1);
if($checkother == 1)
{
if($available_upgrades > 0)
{
print "found $available_upgrades other updates than $pearchannel\n";
exit 1;
}
}
exit 0;
If we correctly set the permissions for the pear-logfile, our nagios-check can read it.
