#!/usr/bin/perl
+use v5.12;
+
use strict;
use warnings;
use IO::File;
use Math::Trig qw(deg2rad pip2 great_circle_distance);
-use XML::Writer;
-use XML::TreeBuilder;
-use YAML;
+use JSON::XS;
+use LWP::UserAgent;
+use YAML::XS qw(LoadFile DumpFile);
-my $source = shift @ARGV;
+my $originfile = shift @ARGV;
+my $clusterfile = shift @ARGV;
my $zone = shift @ARGV;
-my $servers = YAML::LoadFile("src/${source}");
+my $targetoriginfile = shift @ARGV;
+my $origins = LoadFile($originfile);
+my $clusters = LoadFile($clusterfile);
+my $gdnsname = shift @ARGV;
+my @servers;
+
+# Initialise cluster details
+while (my($name,$cluster) = each %$clusters)
+{
+ if ($cluster->{servers})
+ {
+ $cluster->{requests} = 0;
-my %countries = ();
+ foreach my $server (@{$cluster->{servers}})
+ {
+ $server->{cluster} = $cluster;
+ $cluster->{requests} = $cluster->{requests} + $server->{requests};
-my $countries = XML::TreeBuilder->new->parsefile("lib/countries.xml");
+ push @servers, $server;
+ }
+ }
+ elsif ($cluster->{requests} > 0)
+ {
+ my $server = {
+ cluster => $cluster,
+ statuscake => $cluster->{statuscake},
+ requests => $cluster->{requests},
+ cname => $cluster->{cname},
+ ipv4 => $cluster->{ipv4},
+ ipv6 => $cluster->{ipv6}
+ };
+
+ $cluster->{servers} = [ $server ];
+
+ push @servers, $server;
+ }
+ else
+ {
+ $cluster->{servers} = [];
+ }
-foreach my $country ($countries->look_down("_tag" => "country"))
+ $cluster->{name} = $name;
+ $cluster->{status} = "down";
+}
+
+# Initialise server details
+foreach my $server (@servers)
+{
+ $server->{status} = "up";
+}
+
+# If statuscake support is enabled then check which servers are up
+if ($ENV{STATUSCAKE_APIKEY})
{
- my $code = $country->look_down("_tag" => "countryCode")->as_text;
- my $name = $country->look_down("_tag" => "countryName")->as_text;
- 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 $lat = centre_lat( $south, $north );
- my $lon = centre_lon( $west, $east );
- my @servers;
+ my $ua = LWP::UserAgent->new;
+ my $cache;
- foreach my $servername (keys %$servers)
+ $ua->agent("mkgeo/1.0");
+ $ua->default_header("Authorization", "Bearer $ENV{STATUSCAKE_APIKEY}");
+
+ if (-f "statuscake.yml")
{
- my $server = $servers->{$servername};
- my $match = match_country($server, $code, $continent);
+ $cache = LoadFile("statuscake.yml");
+ }
+ else
+ {
+ $cache = {};
+ }
- if ($match eq "preferred" || $match eq "allowed")
+ my $page = 1;
+ my $pages = 1;
+
+ while ($page <= $pages)
+ {
+ my $response = $ua->get("https://api.statuscake.com/v1/uptime?nouptime=true&limit=100&page=${page}");
+
+ if ($response->is_success)
{
- my $priority = $match eq "preferred" ? 20 : 10;
- my $distance = distance($lat, $lon, $server->{lat}, $server->{lon});
+ my $uptime = decode_json($response->content);
+
+ foreach my $test (@{$uptime->{data}})
+ {
+ my $testid = $test->{id};
+
+ if ($test->{status} eq "up" && !$test->{paused})
+ {
+ $cache->{$testid} = "up";
+ }
+ else
+ {
+ $cache->{$testid} = "down";
+ }
+ }
+
+ $page = $page + 1;
+ $pages = $uptime->{metadata}->{page_count};
+ }
+ }
-# print STDERR "$servername is $match for $name with distance $distance\n";
+ foreach my $server (@servers)
+ {
+ if (my $testids = $server->{statuscake})
+ {
+ $server->{status} = "up";
- push @servers, { name => $servername, priority => $priority, distance => $distance };
+ for my $testid (@$testids)
+ {
+ my $testresult = $cache->{$testid} || "down";
+
+ $server->{status} = "down" if $testresult eq "down";
+ }
+ }
+ else
+ {
+ $server->{status} = "down";
}
}
- $countries{$code} = {
- code => $code, name => $name, continent => $continent,
- lat => $lat, lon => $lon, servers => \@servers
+ DumpFile("statuscake-$$.yml", $cache);
+ rename("statuscake-$$.yml", "statuscake.yml");
+}
+
+# Mark a cluster as up if any servers are up
+foreach my $server (@servers)
+{
+ if ($server->{status} eq "up")
+ {
+ $server->{cluster}->{status} = "up";
+ }
+ else
+ {
+ $server->{cluster}->{requests} = $server->{cluster}->{requests} - $server->{requests};
+ }
+}
+
+# Create target origins object
+my $targetorigins = {};
+
+# Initialise cluster details
+while (my($name,$cluster) = each %$clusters)
+{
+ $cluster->{requests_limit} = $cluster->{requests};
+ $cluster->{requests_used} = 0;
+
+ next if $cluster->{global};
+
+ $targetorigins->{$cluster->{name}} = {
+ code => $cluster->{name},
+ name => $cluster->{name},
+ lat => $cluster->{lat},
+ lon => $cluster->{lon},
+ requests => 0
};
}
-$countries->delete;
+my @mappings = ();
-my $zonefile = IO::File->new("> data/${zone}") || die "$!";
-my $kmlfile = IO::File->new("> kml/${zone}.kml") || die "$!";
-my $kmlwriter = XML::Writer->new(OUTPUT => $kmlfile);
+# Scan origins and work out which clusters each can use
+foreach my $origin (values %$origins)
+{
+ foreach my $cluster (values %$clusters)
+ {
+ my $match = match_origin($cluster, $origin);
-$kmlwriter->xmlDecl("UTF-8");
-$kmlwriter->startTag("kml", "xmlns" => "http://www.opengis.net/kml/2.2");
-$kmlwriter->startTag("Document");
+ if ($cluster->{status} eq "up" && $match ne "denied")
+ {
+ my $priority = $match eq "preferred" ? 20 : 10;
+ my $distance;
+
+ if ($cluster->{global})
+ {
+ $distance = 0;
+ }
+ else
+ {
+ $distance = distance($origin->{lat}, $origin->{lon}, $cluster->{lat}, $cluster->{lon});
+ }
+
+ push @mappings, {
+ origin => $origin, cluster => $cluster,
+ priority => $priority, distance => $distance
+ };
+ }
+ }
+}
+
+# Allocate each country to a cluster
+allocate_clusters(@mappings);
-foreach my $country (values %countries)
+# If we failed to allocate every origin then loop, increasing
+# the requests for each cluster by a little and retrying until
+# we manage to allocate everything
+while (grep { !exists($_->{cluster}) } values %$origins)
{
- my @servers = sort { $b->{priority} <=> $a->{priority} || $a->{distance} <=> $b->{distance} } @{$country->{servers}};
- my $server = $servers->{$servers[0]->{name}};
+ # Clear any existing mappings of countries to clusters
+ foreach my $origin (values %$origins)
+ {
+ delete $origin->{cluster};
+ }
- $zonefile->print("C\L$country->{code}\E.${zone}:$servers[0]->{name}.${zone}:600\n");
+ # Reset requests usage for clusters and increase limits by 10%
+ foreach my $cluster (values %$clusters)
+ {
+ $cluster->{requests_used} = 0;
+ $cluster->{requests_limit} = $cluster->{requests_limit} * 1.1;
+ }
- $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");
+ # Try the allocate again
+ allocate_clusters(@mappings);
}
-foreach my $server (keys %$servers)
+# Report on allocation results
+foreach my $name (sort keys %$clusters)
{
- $zonefile->print("Cxx.${zone}:${server}.${zone}:600\n");
+ my $cluster = $clusters->{$name};
+ my $used = int($cluster->{requests_used} + 0.5);
+ my $limit = $cluster->{requests_limit};
+
+ if ($limit > 0)
+ {
+ my $proportion = int($used / $limit * 100 + 0.5);
+
+ print "${name}: used ${used} of ${limit} (${proportion}%)\n";
+ }
+ else
+ {
+ print "${name}: used ${used} of ${limit}\n";
+ }
}
-$kmlwriter->endTag("Document");
-$kmlwriter->endTag("kml");
-$kmlwriter->end();
+# Create JSON collection object
+my @json;
-$kmlfile->close();
-$zonefile->close();
+# Open output files
+my $zonefile = IO::File->new("> include/${zone}.js") || die "$!";
+my $jsonfile = IO::File->new("> json/${zone}.openstreetmap.org.json") || die "$!";
-exit 0;
+# Output headers
+$zonefile->print("var \U${zone}\E_RECORDS = [\n");
-sub centre_lat
+# Output details for each country
+foreach my $origin (sort { $a->{name} cmp $b->{name} } values %$origins)
{
- my $south = shift;
- my $north = shift;
+ my $cluster = $origin->{cluster};
+
+ if (!defined($gdnsname))
+ {
+ $zonefile->print(" CNAME(\"\L$origin->{code}\E.${zone}\", \"$cluster->{name}.${zone}.openstreetmap.org.\", TTL(\"10m\")),\n");
+ }
+
+ if ($cluster->{lon} && $cluster->{lat})
+ {
+ my $clon = $origin->{lon};
+ my $clat = $origin->{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;
+ }
+
+ push @json, {
+ type => "Feature",
+ geometry => {
+ type => "LineString",
+ coordinates => [ [ $clon, $clat ], [ $slon, $slat ] ]
+ },
+ properties => {
+ origin => $origin->{name},
+ server => $cluster->{name},
+ colour => $cluster->{colour}
+ }
+ };
+ }
+
+ next if $cluster->{global};
- return ( $south + $north ) / 2;
+ $targetorigins->{$cluster->{name}}->{requests} += $origin->{requests};
}
-sub centre_lon
+# Skip default records if we don't need them
+if (!defined($gdnsname))
{
- my $west = shift;
- my $east = shift;
- my $lon;
+ # Output default records for IPs that can't be mapped to a country
+ foreach my $cluster (sort { $a->{name} cmp $b->{name} } values %$clusters)
+ {
+ my $name = $cluster->{name};
- if ($west < $east)
+ if (my $default = $cluster->{default})
+ {
+ output_server($zonefile, "${default}.${zone}", $cluster, 0);
+ }
+ elsif (exists($cluster->{default}))
+ {
+ output_server($zonefile, "${zone}", $cluster, 0);
+ }
+ }
+}
+
+# Output A records for each cluster
+foreach my $cluster (sort { $a->{name} cmp $b->{name} } values %$clusters)
+{
+ my $name = $cluster->{name};
+
+ if (@{$cluster->{servers}} > 1)
{
- $lon = ( $west + $east ) / 2;
+ output_server($zonefile, "${name}-%02d.${zone}", $cluster, 1);
}
else
{
- $lon = ( $west + $east + 360 ) / 2;
+ output_server($zonefile, "${name}.${zone}", $cluster, 1);
}
+}
+
+# Output the GeoJSON text
+$jsonfile->print(encode_json(\@json));
- $lon = $lon - 360 if $lon > 180;
+# Output footers
+$zonefile->print("];\n");
+
+# Close the output files
+$zonefile->close();
+$zonefile->close();
+
+# Output gdnsd configuration
+if (defined($gdnsname))
+{
+ my $gdnsmapfile = IO::File->new("> gdns/${gdnsname}.map") || die "$!";
+ my $gdnsresourcefile = IO::File->new("> gdns/${gdnsname}.resource") || die "$!";
+ my $gdnsweightedfile = IO::File->new("> gdns/${gdnsname}.weighted") || die "$!";
+ my $continent = "";
+
+ $gdnsmapfile->print("${gdnsname} => {\n");
+ $gdnsmapfile->print(" geoip2_db => /usr/share/GeoIP/GeoLite2-Country.mmdb\n");
+ $gdnsmapfile->print(" datacenters => [" . join(",", sort(keys(%$clusters))) . "]\n");
+ $gdnsmapfile->print(" map => {\n");
+ $gdnsmapfile->print(" default => [" . join(",", sort(map { $_->{name} } grep { $_->{default} } values(%$clusters))) . "]\n");
+
+ foreach my $origin (sort { $a->{continent} cmp $b->{continent} || $a->{code} cmp $b->{code} } values %$origins)
+ {
+ my $code = $origin->{code};
+ my $cluster = $origin->{cluster}->{name};
+
+ next if $code eq "XK";
+
+ if ($continent ne $origin->{continent})
+ {
+ $gdnsmapfile->print(" }\n") if $continent;
+
+ $continent = $origin->{continent};
+
+ $gdnsmapfile->print(" ${continent} => {\n");
+ }
- return $lon
+ $gdnsmapfile->print(" ${code} => [${cluster}]\n");
+ }
+
+ $gdnsmapfile->print(" }\n") if $continent;
+
+ $gdnsmapfile->print(" }\n");
+ $gdnsmapfile->print("}\n");
+
+ $gdnsresourcefile->print("${gdnsname} => {\n");
+ $gdnsresourcefile->print(" map => ${gdnsname}\n");
+ $gdnsresourcefile->print(" dcmap => {\n");
+
+ foreach my $cluster (sort { $a->{name} cmp $b->{name} } values %$clusters)
+ {
+ my $name = $cluster->{name};
+
+ if (@{$cluster->{servers}} > 1 && grep { $_->{status} eq "up" } @{$cluster->{servers}})
+ {
+ $gdnsweightedfile->print("${name} => {\n");
+
+ while (my($index,$server) = each @{$cluster->{servers}})
+ {
+ if ($server->{status} eq "up")
+ {
+ my $number = sprintf("%02d", $index + 1);
+ my $requests = $server->{requests};
+
+ if (my $cname = $server->{cname})
+ {
+ $gdnsweightedfile->print(" ${name}-${number} = [ ${cname}., ${requests} ]\n");
+ }
+ else
+ {
+ $gdnsweightedfile->print(" ${name}-${number} = [ ${name}-${number}.${zone}.openstreetmap.org., ${requests} ]\n");
+ }
+ }
+ }
+
+ $gdnsweightedfile->print("}\n");
+
+ $gdnsresourcefile->print(" ${name} => %weighted!${name}\n");
+ }
+ elsif (my $cname = $cluster->{cname})
+ {
+ $gdnsresourcefile->print(" ${name} => ${cname}.\n");
+ }
+ else
+ {
+ $gdnsresourcefile->print(" ${name} => ${name}.${zone}.openstreetmap.org.\n");
+ }
+ }
+
+ $gdnsresourcefile->print(" }\n");
+ $gdnsresourcefile->print("}\n");
+
+ $gdnsweightedfile->close();
+ $gdnsresourcefile->close();
+ $gdnsmapfile->close();
}
-sub match_country
+# Output the target details in origin format if required
+DumpFile($targetoriginfile, $targetorigins) if $targetoriginfile;
+
+exit 0;
+
+#
+# Match an origin against a cluster
+#
+sub match_origin
{
- my $server = shift;
- my $country = shift;
- my $continent = shift;
+ my $cluster = shift;
+ my $origin = shift;
my $match;
- if ($server->{preferred} &&
- $server->{preferred}->{countries} &&
- grep { $_ eq $country } @{$server->{preferred}->{countries}})
+ if ($cluster->{preferred} &&
+ $cluster->{preferred}->{origins} &&
+ grep { $_ eq $origin->{name} } @{$cluster->{preferred}->{origins}})
{
$match = "preferred";
}
- elsif ($server->{preferred} &&
- $server->{preferred}->{continents} &&
- grep { $_ eq $continent } @{$server->{preferred}->{continents}})
+ elsif ($cluster->{allowed} &&
+ $cluster->{allowed}->{origins} &&
+ grep { $_ eq $origin->{name} } @{$cluster->{allowed}->{origins}})
+ {
+ $match = "allowed";
+ }
+ elsif ($cluster->{preferred} &&
+ $cluster->{preferred}->{countries} &&
+ grep { $_ eq $origin->{country} } @{$cluster->{preferred}->{countries}})
{
$match = "preferred";
}
- elsif ($server->{allowed} &&
- $server->{allowed}->{countries} &&
- grep { $_ eq $country } @{$server->{allowed}->{countries}})
+ elsif ($cluster->{allowed} &&
+ $cluster->{allowed}->{countries} &&
+ grep { $_ eq $origin->{country} } @{$cluster->{allowed}->{countries}})
{
$match = "allowed";
}
- elsif ($server->{allowed} &&
- $server->{allowed}->{continents} &&
- grep { $_ eq $continent } @{$server->{allowed}->{continents}})
+ elsif ($cluster->{denied} &&
+ $cluster->{denied}->{countries} &&
+ grep { $_ eq $origin->{country} } @{$cluster->{denied}->{countries}})
+ {
+ $match = "denied";
+ }
+ elsif ($cluster->{preferred} &&
+ $cluster->{preferred}->{continents} &&
+ grep { $_ eq $origin->{continent} } @{$cluster->{preferred}->{continents}})
+ {
+ $match = "preferred";
+ }
+ elsif ($cluster->{allowed} &&
+ $cluster->{allowed}->{continents} &&
+ grep { $_ eq $origin->{continent} } @{$cluster->{allowed}->{continents}})
{
$match = "allowed";
}
- elsif ($server->{allowed})
+ elsif ($cluster->{denied} &&
+ $cluster->{denied}->{continents} &&
+ grep { $_ eq $origin->{continent} } @{$cluster->{denied}->{continents}})
{
- $match = "none";
+ $match = "denied";
+ }
+ elsif ($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 - $lat2);
}
+
+#
+# Allocate each origin to a cluster
+#
+sub allocate_clusters
+{
+ my @mappings = sort { compare_mappings($a, $b) } @_;
+
+ # Loop over the mappings, trying to assign each origin to the
+ # nearest cluster, but subject to the request limits
+ while (my $mapping = shift @mappings)
+ {
+ my @group;
+
+ push @group, $mapping;
+
+ while (@mappings && compare_mappings($mapping, $mappings[0]) == 0)
+ {
+ push @group, shift @mappings;
+ }
+
+ for my $mapping (sort compare_requests @group)
+ {
+ my $origin = $mapping->{origin};
+ my $cluster = $mapping->{cluster};
+
+ if (!exists($origin->{cluster}) &&
+ $cluster->{requests_used} + $origin->{requests} <= $cluster->{requests_limit})
+ {
+ $origin->{cluster} = $cluster;
+ $cluster->{requests_used} = $cluster->{requests_used} + $origin->{requests};
+ }
+ }
+ }
+
+ return;
+}
+
+#
+# Compare two mappings to decide which to use
+#
+sub compare_mappings
+{
+ my $a = shift;
+ my $b = shift;
+
+ return $b->{priority} <=> $a->{priority} ||
+ $a->{distance} <=> $b->{distance};
+}
+
+#
+# Compare two mappings to decide which to try first
+#
+sub compare_requests
+{
+ my $a_used = ( $a->{cluster}->{requests_used} * 100.0 ) / ( $a->{cluster}->{requests_limit} * 1.0 );
+ my $b_used = ( $b->{cluster}->{requests_used} * 100.0 ) / ( $b->{cluster}->{requests_limit} * 1.0 );
+
+ return $a_used <=> $b_used;
+}
+
+#
+# Output DNS records for a server
+#
+sub output_server
+{
+ my $zonefile = shift;
+ my $name = shift;
+ my $cluster = shift;
+ my $all = shift;
+
+ while (my($index,$server) = each @{$cluster->{servers}})
+ {
+ if ($all || $server->{status} eq "up")
+ {
+ if ($server->{ipv4})
+ {
+ $zonefile->printf(" A(\"${name}\", \"$server->{ipv4}\", TTL(\"10m\")),\n", $index + 1);
+ }
+
+ if ($server->{ipv6})
+ {
+ $zonefile->printf(" AAAA(\"${name}\", \"$server->{ipv6}\", TTL(\"10m\")),\n", $index + 1);
+ }
+ }
+ }
+
+ return;
+}
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