If you have scripts to monitor the status of your mirror, please post them here.

Nagios

This check is suitable for Nagios installations. It will do a HEAD-request on the requested file on both your webserver and the main webserver and calculate the time-difference between the two last-modified headers.

Call this script as follows:

define command {
        command_name    check_ubuntu
        command_line    /etc/nagios-plugins/custom/check_ubuntu $HOSTNAME$ $ARG1$ $ARG2$
        }

And:

define service{
        use                             generic-service
        host_name                       <your mirrors hostname>
        service_description             Mirror status
        check_command                   check_ubuntu!<hostname of main mirror>!<file to check>
}

Good files to check are:

• ubuntu/ls-lR.gz for archive mirrors
• .pool/MD5SUMS for releases mirrors

# Create a user agent object
use LWP::UserAgent;
use Net::DNS;
use Date::Parse;
use strict;
use lib "/usr/lib/nagios/plugins";
use utils qw($TIMEOUT %ERRORS &print_revision &support);

my ($yourhost, $mainhost, $file) = @ARGV;

my $ua = LWP::UserAgent->new;
$ua->agent("UbuntuMirrorCheck/0.1 ");

# Create a request
my $canonical = HTTP::Request->new(HEAD => 'http://'.$mainhost.'/'.$file);
my $mirror    = HTTP::Request->new(HEAD => 'http://'.$yourhost.'/'.$file);

# Pass request to the user agent and get a response back
my $canonical_res = $ua->request($canonical);
my $mirror_res    = $ua->request($mirror);

# Check the outcome of the response
if ($mirror_res->is_success) {
        my $canonical_time = str2time($canonical_res->header('last-modified'));
        my $mirror_time    = str2time($mirror_res->header('last-modified'));

        if ($mirror_time > $canonical_time) {
                print "WARNING - Mirror seems to live in the future";
                exit $ERRORS{"WARNING"};
        } else {
                my $diff = $canonical_time - $mirror_time;
                my ($rest, $days, $hours, $minutes, $seconds) = (0, 0, 0, 0, 0);
                $days = int($diff/86400);
                $rest = $diff-($days*86400);
                $hours = int($rest/3600);
                $rest = $rest-($hours*3600);
                $minutes = int($rest/60);
                $rest = $rest-($minutes*60);
                $seconds = $rest;
                if ($diff > 43200) {
                        print "CRITICAL - Mirror is $days days, $hours hours, $minutes minutes and $seconds seconds behind";
                        exit $ERRORS{"CRITICAL"};
                } else {
                        print "OK - Mirror is $days days, $hours hours, $minutes minutes and $seconds seconds behind";
                        exit $ERRORS{"OK"};
                }
        }
} else {
    print "CRITICAL - Mirror is unavailable";
    exit $ERRORS{"CRITICAL"};
}