7 use Math::Trig qw(deg2rad pip2 great_circle_distance);
12 my $originfile = shift @ARGV;
13 my $clusterfile = shift @ARGV;
14 my $zone = shift @ARGV;
15 my $targetoriginfile = shift @ARGV;
16 my $origins = YAML::LoadFile($originfile);
17 my $clusters = YAML::LoadFile($clusterfile);
18 my $gdnsname = shift @ARGV;
21 # Initialise cluster details
22 while (my($name,$cluster) = each %$clusters)
24 if ($cluster->{servers})
26 $cluster->{bandwidth} = 0;
28 foreach my $server (@{$cluster->{servers}})
30 $server->{cluster} = $cluster;
31 $cluster->{bandwidth} = $cluster->{bandwidth} + $server->{bandwidth};
33 push @servers, $server;
40 statuscake => $cluster->{statuscake},
41 bandwidth => $cluster->{bandwidth},
42 ipv4 => $cluster->{ipv4},
43 ipv6 => $cluster->{ipv6}
46 $cluster->{servers} = [ $server ];
48 push @servers, $server;
51 $cluster->{name} = $name;
52 $cluster->{status} = "down";
55 # Initialise server details
56 foreach my $server (@servers)
58 $server->{status} = "up";
61 # If statuscake support is enabled then check which servers are up
62 if ($ENV{STATUSCAKE_USERNAME} && $ENV{STATUSCAKE_APIKEY})
64 my $ua = LWP::UserAgent->new;
67 $ua->agent("mkgeo/1.0");
68 $ua->default_header("Username", $ENV{STATUSCAKE_USERNAME});
69 $ua->default_header("API", $ENV{STATUSCAKE_APIKEY});
71 if (-f "statuscake.yml")
73 $cache = YAML::LoadFile("statuscake.yml");
80 my $response = $ua->get("https://app.statuscake.com/API/Tests/");
82 if ($response->is_success)
84 my $tests = decode_json($response->content);
86 foreach my $test (@$tests)
88 my $testid = $test->{TestID};
90 if ($test->{Status} eq "Up" && !$test->{Paused})
92 $cache->{$testid} = "up";
96 $cache->{$testid} = "down";
101 foreach my $server (@servers)
103 if (my $testids = $server->{statuscake})
105 $server->{status} = "up";
107 for my $testid (@$testids)
109 my $testresult = $cache->{$testid} || "down";
111 $server->{status} = "down" if $testresult eq "down";
116 $server->{status} = "down";
120 YAML::DumpFile("statuscake.yml", $cache);
123 # Mark a cluster as up if any servers are up
124 foreach my $server (@servers)
126 if ($server->{status} eq "up")
128 $server->{cluster}->{status} = "up";
132 $server->{cluster}->{bandwidth} = $server->{cluster}->{bandwidth} - $server->{bandwidth};
136 # Create target origins object
137 my $targetorigins = {};
139 # Initialise cluster details
140 while (my($name,$cluster) = each %$clusters)
142 $cluster->{bandwidth_limit} = $cluster->{bandwidth} * 1024 * 1024;
143 $cluster->{bandwidth_used} = 0;
145 $targetorigins->{$cluster->{name}} = {
146 code => $cluster->{name},
147 name => $cluster->{name},
148 lat => $cluster->{lat},
149 lon => $cluster->{lon},
156 # Scan origins and work out which clusters each can use
157 foreach my $origin (values %$origins)
159 foreach my $cluster (values %$clusters)
161 my $match = match_origin($cluster, $origin);
163 if ($cluster->{status} eq "up" && $match ne "denied")
165 my $priority = $match eq "preferred" ? 20 : 10;
166 my $distance = distance($origin->{lat}, $origin->{lon}, $cluster->{lat}, $cluster->{lon});
169 origin => $origin, cluster => $cluster,
170 priority => $priority, distance => $distance
176 # Allocate each country to a cluster
177 allocate_clusters(@mappings);
179 # If we failed to allocate every origin then loop, increasing
180 # the bandwidth for each cluster by a little and retrying until
181 # we manage to allocate everything
182 while (grep { !exists($_->{cluster}) } values %$origins)
184 # Clear any existing mappings of countries to clusters
185 foreach my $origin (values %$origins)
187 delete $origin->{cluster};
190 # Reset bandwidth usage for clusters and increase limits by 10%
191 foreach my $cluster (values %$clusters)
193 $cluster->{bandwidth_used} = 0;
194 $cluster->{bandwidth_limit} = $cluster->{bandwidth_limit} * 1.1;
197 # Try the allocate again
198 allocate_clusters(@mappings);
201 # Create JSON collection object
205 my $zonefile = IO::File->new("> data/${zone}") || die "$!";
206 my $jsonfile = IO::File->new("> json/${zone}.json") || die "$!";
208 # Output details for each country
209 foreach my $origin (sort { $a->{name} cmp $b->{name} } values %$origins)
211 my $cluster = $origin->{cluster};
212 my $clon = $origin->{lon};
213 my $clat = $origin->{lat};
214 my $slon = $cluster->{lon};
215 my $slat = $cluster->{lat};
217 if ($clon > 0 && $slon < 0 && 360 + $slon - $clon < $clon - $slon)
221 elsif ($slon > 0 && $clon < 0 && 360 + $clon - $slon < $slon - $clon)
226 $zonefile->print("# $origin->{name}\n");
227 $zonefile->print("C\L$origin->{code}\E.${zone}:$cluster->{name}.${zone}:600\n");
232 type => "LineString",
233 coordinates => [ [ $clon, $clat ], [ $slon, $slat ] ]
236 origin => $origin->{name},
237 server => $cluster->{name},
238 colour => $cluster->{colour}
242 $targetorigins->{$cluster->{name}}->{bandwidth} += $origin->{bandwidth};
245 # Header for default records
246 $zonefile->print("# Unknown origins\n");
248 # Output default records for IPs that can't be mapped to a country
249 foreach my $cluster (sort { $a->{name} cmp $b->{name} } values %$clusters)
251 my $name = $cluster->{name};
253 if (my $default = $cluster->{default})
255 output_server($zonefile, "${default}.${zone}", $cluster);
257 elsif (exists($cluster->{default}))
259 output_server($zonefile, "${zone}", $cluster);
263 # Header for underlying servers
264 $zonefile->print("# Servers\n");
266 # Output A records for each cluster
267 foreach my $cluster (sort { $a->{name} cmp $b->{name} } values %$clusters)
269 my $name = $cluster->{name};
271 output_server($zonefile, "${name}.${zone}", $cluster);
274 # Output the GeoJSON text
275 $jsonfile->print(encode_json(\@json));
277 # Close the output files
281 # Output gdnsd configuration
282 if (defined($gdnsname))
284 my $gdnsmapfile = IO::File->new("> gdns/${gdnsname}.map") || die "$!";
285 my $gdnsresourcefile = IO::File->new("> gdns/${gdnsname}.resource") || die "$!";
288 $gdnsmapfile->print("${gdnsname} => {\n");
289 $gdnsmapfile->print(" geoip2_db => /var/lib/GeoIP/GeoLite2-Country.mmdb\n");
290 $gdnsmapfile->print(" datacenters => [" . join(",", sort(keys(%$clusters))) . "]\n");
291 $gdnsmapfile->print(" map => {\n");
292 $gdnsmapfile->print(" default => [" . join(",", sort(map { $_->{name} } grep { $_->{default} } values(%$clusters))) . "]\n");
294 foreach my $origin (sort { $a->{continent} cmp $b->{continent} || $a->{code} cmp $b->{code} } values %$origins)
296 my $code = $origin->{code};
297 my $cluster = $origin->{cluster}->{name};
299 next if $code eq "XK";
301 if ($continent ne $origin->{continent})
303 $gdnsmapfile->print(" }\n") if $continent;
305 $continent = $origin->{continent};
307 $gdnsmapfile->print(" ${continent} => {\n");
310 $gdnsmapfile->print(" ${code} => [${cluster}]\n");
313 $gdnsmapfile->print(" }\n") if $continent;
315 $gdnsmapfile->print(" }\n");
316 $gdnsmapfile->print("}\n");
318 $gdnsresourcefile->print("${gdnsname} => {\n");
319 $gdnsresourcefile->print(" map => ${gdnsname}\n");
320 $gdnsresourcefile->print(" dcmap => {\n");
322 foreach my $cluster (sort { $a->{name} cmp $b->{name} } values %$clusters)
324 my $name = $cluster->{name};
326 $gdnsresourcefile->print(" ${name} => ${name}.tile.openstreetmap.org.\n");
329 $gdnsresourcefile->print(" }\n");
330 $gdnsresourcefile->print("}\n");
332 $gdnsresourcefile->close();
333 $gdnsmapfile->close();
336 # Output the target details in origin format if required
337 YAML::DumpFile($targetoriginfile, $targetorigins) if $targetoriginfile;
342 # Match an origin against a cluster
350 if ($cluster->{preferred} &&
351 $cluster->{preferred}->{origins} &&
352 grep { $_ eq $origin->{name} } @{$cluster->{preferred}->{origins}})
354 $match = "preferred";
356 elsif ($cluster->{allowed} &&
357 $cluster->{allowed}->{origins} &&
358 grep { $_ eq $origin->{name} } @{$cluster->{allowed}->{origins}})
362 elsif ($cluster->{preferred} &&
363 $cluster->{preferred}->{countries} &&
364 grep { $_ eq $origin->{country} } @{$cluster->{preferred}->{countries}})
366 $match = "preferred";
368 elsif ($cluster->{allowed} &&
369 $cluster->{allowed}->{countries} &&
370 grep { $_ eq $origin->{country} } @{$cluster->{allowed}->{countries}})
374 elsif ($cluster->{denied} &&
375 $cluster->{denied}->{countries} &&
376 grep { $_ eq $origin->{country} } @{$cluster->{denied}->{countries}})
380 elsif ($cluster->{preferred} &&
381 $cluster->{preferred}->{continents} &&
382 grep { $_ eq $origin->{continent} } @{$cluster->{preferred}->{continents}})
384 $match = "preferred";
386 elsif ($cluster->{allowed} &&
387 $cluster->{allowed}->{continents} &&
388 grep { $_ eq $origin->{continent} } @{$cluster->{allowed}->{continents}})
392 elsif ($cluster->{denied} &&
393 $cluster->{denied}->{continents} &&
394 grep { $_ eq $origin->{continent} } @{$cluster->{denied}->{continents}})
398 elsif ($cluster->{allowed})
411 # Compute the great circle distance between two points
415 my $lat1 = deg2rad(shift);
416 my $lon1 = deg2rad(shift);
417 my $lat2 = deg2rad(shift);
418 my $lon2 = deg2rad(shift);
420 return great_circle_distance($lon1, pip2 - $lat1, $lon2, pip2 - $lat2);
424 # Allocate each origin to a cluster
426 sub allocate_clusters
428 my @mappings = sort { compare_mappings($a, $b) } @_;
430 # Loop over the mappings, trying to assign each origin to the
431 # nearest cluster, but subject to the bandwidth limits
432 while (my $mapping = shift @mappings)
436 push @group, $mapping;
438 while (@mappings && compare_mappings($mapping, $mappings[0]) == 0)
440 push @group, shift @mappings;
443 for my $mapping (sort compare_bandwidth @group)
445 my $origin = $mapping->{origin};
446 my $cluster = $mapping->{cluster};
448 if (!exists($origin->{cluster}) &&
449 $cluster->{bandwidth_used} + $origin->{bandwidth} <= $cluster->{bandwidth_limit})
451 $origin->{cluster} = $cluster;
452 $cluster->{bandwidth_used} = $cluster->{bandwidth_used} + $origin->{bandwidth};
461 # Compare two mappings to decide which to use
468 return $b->{priority} <=> $a->{priority} ||
469 $a->{distance} <=> $b->{distance};
473 # Compare two mappings to decide which to try first
475 sub compare_bandwidth
477 my $a_used = ( $a->{cluster}->{bandwidth_used} * 100.0 ) / ( $a->{cluster}->{bandwidth_limit} * 1.0 );
478 my $b_used = ( $b->{cluster}->{bandwidth_used} * 100.0 ) / ( $b->{cluster}->{bandwidth_limit} * 1.0 );
480 return $a_used <=> $b_used;
484 # Output DNS records for a server
488 my $zonefile = shift;
492 foreach my $server (@{$cluster->{servers}})
494 if ($server->{status} eq "up")
496 $zonefile->print("+${name}:$server->{ipv4}:600\n");
500 # $zonefile->print("3${name}:$server->{ipv6}:600\n");