use IO::File;
use Math::Trig qw(deg2rad pip2 great_circle_distance);
-use XML::Writer;
+use JSON::XS;
+use LWP::UserAgent;
use XML::TreeBuilder;
use YAML;
my $source = shift @ARGV;
my $zone = shift @ARGV;
-my $servers = YAML::LoadFile("src/${source}");
+my $clusters = YAML::LoadFile("src/${source}");
+my @servers;
+
+# Initialise cluster details
+while (my($name,$cluster) = each %$clusters)
+{
+ if ($cluster->{servers})
+ {
+ $cluster->{bandwidth} = 0;
+
+ foreach my $server (@{$cluster->{servers}})
+ {
+ $server->{cluster} = $cluster;
+ $cluster->{bandwidth} = $cluster->{bandwidth} + $server->{bandwidth};
+
+ push @servers, $server;
+ }
+ }
+ else
+ {
+ my $server = {
+ cluster => $cluster,
+ pingdom => $cluster->{pingdom},
+ bandwidth => $cluster->{bandwidth},
+ ipv4 => $cluster->{ipv4},
+ ipv6 => $cluster->{ipv6}
+ };
+
+ $cluster->{servers} = [ $server ];
+
+ push @servers, $server;
+ }
+
+ $cluster->{name} = $name;
+
+ if ($ENV{PINGDOM_USERNAME} && $ENV{PINGDOM_PASSWORD})
+ {
+ $cluster->{status} = "down";
+ }
+ else
+ {
+ $cluster->{status} = "up";
+ }
+}
+
+# Initialise server details
+foreach my $server (@servers)
+{
+ if ($ENV{PINGDOM_USERNAME} && $ENV{PINGDOM_PASSWORD})
+ {
+ $server->{status} = "down";
+ }
+ else
+ {
+ $server->{status} = "up";
+ }
+}
+
+# If pingdom support is enabled then check which servers are up
+if ($ENV{PINGDOM_USERNAME} && $ENV{PINGDOM_PASSWORD})
+{
+ my $ua = LWP::UserAgent->new;
+
+ $ua->default_header("App-Key", "2cohi62u5haxvqmypk3ljqqrze1jufrh");
+ $ua->credentials("api.pingdom.com:443", "Pingdom API", $ENV{PINGDOM_USERNAME}, $ENV{PINGDOM_PASSWORD});
+
+ foreach my $server (@servers)
+ {
+ if (my $checkid = $server->{pingdom})
+ {
+ my $response = $ua->get("https://api.pingdom.com/api/2.0/checks/${checkid}");
+
+ if ($response->is_success)
+ {
+ my $check = decode_json($response->content);
+
+ $server->{status} = $check->{check}->{status};
+
+ if ($server->{status} eq "up")
+ {
+ $server->{cluster}->{status} = "up";
+ }
+ else
+ {
+ $server->{cluster}->{bandwidth} = $server->{cluster}->{bandwidth} - $server->{bandwidth};
+ }
+ }
+ }
+ }
+}
+
+# Initialise cluster details
+while (my($name,$cluster) = each %$clusters)
+{
+ $cluster->{bandwidth_limit} = $cluster->{bandwidth} * 1024 * 1024;
+ $cluster->{bandwidth_used} = 0;
+}
my %countries = ();
+my @mappings = ();
+
+# Create a parser for the country database
+my $countries = XML::TreeBuilder->new;
-my $countries = XML::TreeBuilder->new->parsefile("lib/countries.xml");
+# Parse the country database
+$countries->parsefile("lib/countries.xml");
+# Load the per-country bandwidth details
+my $bandwidth = YAML::LoadFile("bandwidth/${source}.yml");
+
+# Fill in country table and work out which clusters each can use
foreach my $country ($countries->look_down("_tag" => "country"))
{
my $code = $country->look_down("_tag" => "countryCode")->as_text;
my $name = $country->look_down("_tag" => "countryName")->as_text;
+ my $population = $country->look_down("_tag" => "population")->as_text;
+ my $bandwidth = $bandwidth->{$code} || 0;
my $continent = $country->look_down("_tag" => "continent")->as_text;
- my $west = $country->look_down("_tag" => "bBoxWest")->as_text;
- my $north = $country->look_down("_tag" => "bBoxNorth")->as_text;
- my $east = $country->look_down("_tag" => "bBoxEast")->as_text;
- my $south = $country->look_down("_tag" => "bBoxSouth")->as_text;
+ my $west = $country->look_down("_tag" => "west")->as_text;
+ my $north = $country->look_down("_tag" => "north")->as_text;
+ my $east = $country->look_down("_tag" => "east")->as_text;
+ my $south = $country->look_down("_tag" => "south")->as_text;
my $lat = centre_lat( $south, $north );
my $lon = centre_lon( $west, $east );
- my @servers;
- foreach my $servername (keys %$servers)
+ $countries{$code} = {
+ code => $code, name => $name, continent => $continent,
+ bandwidth => $bandwidth, lat => $lat, lon => $lon
+ };
+
+ foreach my $cluster (values %$clusters)
{
- my $server = $servers->{$servername};
- my $match = match_country($server, $code, $continent);
+ my $match = match_country($cluster, $code, $continent);
- if ($match eq "preferred" || $match eq "allowed")
+ if ($cluster->{status} eq "up" && $match ne "denied")
{
my $priority = $match eq "preferred" ? 20 : 10;
- my $distance = distance($lat, $lon, $server->{lat}, $server->{lon});
-
-# print STDERR "$servername is $match for $name with distance $distance\n";
+ my $distance = distance($lat, $lon, $cluster->{lat}, $cluster->{lon});
- push @servers, { name => $servername, priority => $priority, distance => $distance };
+ push @mappings, {
+ country => $countries{$code}, cluster => $cluster,
+ priority => $priority, distance => $distance
+ };
}
}
-
- $countries{$code} = {
- code => $code, name => $name, continent => $continent,
- lat => $lat, lon => $lon, servers => \@servers
- };
}
+# Discard the parsed country database
$countries->delete;
-my $zonefile = IO::File->new("> data/${zone}") || die "$!";
-my $kmlfile = IO::File->new("> kml/${zone}.kml") || die "$!";
-my $kmlwriter = XML::Writer->new(OUTPUT => $kmlfile);
+# Allocate each country to a cluster
+allocate_clusters(\@mappings);
+
+# If we failed to allocate every country then loop, increasing
+# the bandwidth for each cluster by a little and retrying until
+# we manage to allocate everything
+while (grep { !exists($_->{cluster}) } values %countries)
+{
+ # Clear any existing mappings of countries to clusters
+ foreach my $country (values %countries)
+ {
+ delete $country->{cluster};
+ }
+
+ # Reset bandwidth usage for clusters and increase limits by 10%
+ foreach my $cluster (values %$clusters)
+ {
+ $cluster->{bandwidth_used} = 0;
+ $cluster->{bandwidth_limit} = $cluster->{bandwidth_limit} * 1.1;
+ }
-$kmlwriter->xmlDecl("UTF-8");
-$kmlwriter->startTag("kml", "xmlns" => "http://www.opengis.net/kml/2.2");
-$kmlwriter->startTag("Document");
+ # Try the allocate again
+ allocate_clusters(\@mappings);
+}
+
+# Create JSON collection object
+my @json;
+
+# Open output files
+my $zonefile = IO::File->new("> data/${zone}") || die "$!";
+my $jsonfile = IO::File->new("> json/${zone}.json") || die "$!";
+# Output details for each country
foreach my $country (values %countries)
{
- my @servers = sort { $b->{priority} <=> $a->{priority} || $a->{distance} <=> $b->{distance} } @{$country->{servers}};
- my $server = $servers->{$servers[0]->{name}};
-
- $zonefile->print("C\L$country->{code}\E.${zone}:$servers[0]->{name}.${zone}:600\n");
-
- $kmlwriter->startTag("Placemark");
- $kmlwriter->dataElement("name", $country->{name});
- $kmlwriter->startTag("LineString");
- $kmlwriter->startTag("coordinates");
- $kmlwriter->characters("$country->{lon},$country->{lat}");
- $kmlwriter->characters("$server->{lon},$server->{lat}");
- $kmlwriter->endTag("coordinates");
- $kmlwriter->endTag("LineString");
- $kmlwriter->endTag("Placemark");
+ my $cluster = $country->{cluster};
+ my $clon = $country->{lon};
+ my $clat = $country->{lat};
+ my $slon = $cluster->{lon};
+ my $slat = $cluster->{lat};
+
+ if ($clon > 0 && $slon < 0 && 360 + $slon - $clon < $clon - $slon)
+ {
+ $slon = $slon + 360;
+ }
+ elsif ($slon > 0 && $clon < 0 && 360 + $clon - $slon < $slon - $clon)
+ {
+ $clon = $clon + 360;
+ }
+
+ $zonefile->print("# $country->{name}\n");
+ $zonefile->print("C\L$country->{code}\E.${zone}:$cluster->{name}.${zone}:600\n");
+
+ push @json, {
+ type => "Feature",
+ geometry => {
+ type => "LineString",
+ coordinates => [ [ $clon, $clat ], [ $slon, $slat ] ]
+ },
+ properties => {
+ country => $country->{name},
+ server => $cluster->{name},
+ colour => $cluster->{colour}
+ }
+ };
}
-foreach my $server (keys %$servers)
+# Output default records for IPs that can't be mapped to a country
+foreach my $cluster (grep { $clusters->{$_}->{default} } keys %$clusters)
{
- $zonefile->print("Cxx.${zone}:${server}.${zone}:600\n");
+ $zonefile->print("# Unknown countries\n");
+ $zonefile->print("Cxx.${zone}:${cluster}.${zone}:600\n");
}
-$kmlwriter->endTag("Document");
-$kmlwriter->endTag("kml");
-$kmlwriter->end();
+$zonefile->print("# Servers\n");
-$kmlfile->close();
+# Output A records for each cluster
+while (my($name,$cluster) = each %$clusters)
+{
+ foreach my $server (@{$cluster->{servers}})
+ {
+ if ($server->{status} eq "up")
+ {
+ $zonefile->print("+${name}.${zone}:$server->{ipv4}:600\n");
+
+ if ($server->{ipv6})
+ {
+# $zonefile->print("3${name}.${zone}:$server->{ipv6}:600\n");
+ }
+ }
+ }
+}
+
+# Output the GeoJSON text
+$jsonfile->print(encode_json(\@json));
+
+# Close the output files
+$jsonfile->close();
$zonefile->close();
exit 0;
+#
+# Find the centre value between two latitudes
+#
sub centre_lat
{
my $south = shift;
return ( $south + $north ) / 2;
}
+#
+# Find the centre value between two longitudes
+#
sub centre_lon
{
my $west = shift;
return $lon
}
+#
+# Match a country against a cluster
+#
sub match_country
{
- my $server = shift;
+ my $cluster = shift;
my $country = shift;
my $continent = shift;
my $match;
- if ($server->{preferred} &&
- $server->{preferred}->{countries} &&
- grep { $_ eq $country } @{$server->{preferred}->{countries}})
+ if ($cluster->{preferred} &&
+ $cluster->{preferred}->{countries} &&
+ grep { $_ eq $country } @{$cluster->{preferred}->{countries}})
{
$match = "preferred";
}
- elsif ($server->{preferred} &&
- $server->{preferred}->{continents} &&
- grep { $_ eq $continent } @{$server->{preferred}->{continents}})
+ elsif ($cluster->{preferred} &&
+ $cluster->{preferred}->{continents} &&
+ grep { $_ eq $continent } @{$cluster->{preferred}->{continents}})
{
$match = "preferred";
}
- elsif ($server->{allowed} &&
- $server->{allowed}->{countries} &&
- grep { $_ eq $country } @{$server->{allowed}->{countries}})
+ elsif ($cluster->{allowed} &&
+ $cluster->{allowed}->{countries} &&
+ grep { $_ eq $country } @{$cluster->{allowed}->{countries}})
{
$match = "allowed";
}
- elsif ($server->{allowed} &&
- $server->{allowed}->{continents} &&
- grep { $_ eq $continent } @{$server->{allowed}->{continents}})
+ elsif ($cluster->{allowed} &&
+ $cluster->{allowed}->{continents} &&
+ grep { $_ eq $continent } @{$cluster->{allowed}->{continents}})
{
$match = "allowed";
}
- elsif ($server->{allowed})
+ elsif ($cluster->{denied} &&
+ $cluster->{denied}->{countries} &&
+ grep { $_ eq $country } @{$cluster->{preferred}->{countries}})
{
- $match = "none";
+ $match = "denied";
+ }
+ elsif ($cluster->{denied} &&
+ $cluster->{denied}->{continents} &&
+ grep { $_ eq $continent } @{$cluster->{preferred}->{continents}})
+ {
+ $match = "denied";
+ }
+ elsif ($cluster->{allowed})
+ {
+ $match = "denied";
}
else
{
return $match;
}
+#
+# Compute the great circle distance between two points
+#
sub distance
{
my $lat1 = deg2rad(shift);
return great_circle_distance($lon1, pip2 - $lat1, $lon2, pip2 - $lat2);
}
+
+#
+# Allocate each country to a cluster
+#
+sub allocate_clusters
+{
+ my $mappings = shift;
+
+ # Loop over the mappings, trying to assign each country to the
+ # nearest cluster, but subject to the bandwidth limits
+ foreach my $mapping (sort { $b->{priority} <=> $a->{priority} || $a->{distance} <=> $b->{distance} } @$mappings)
+ {
+ my $country = $mapping->{country};
+ my $cluster = $mapping->{cluster};
+
+ if (!exists($country->{cluster}) &&
+ $cluster->{bandwidth_used} + $country->{bandwidth} <= $cluster->{bandwidth_limit})
+ {
+ $country->{cluster} = $cluster;
+ $cluster->{bandwidth_used} = $cluster->{bandwidth_used} + $country->{bandwidth};
+ }
+ }
+
+ return;
+}
projects / dns.git / blobdiff