my $source = shift @ARGV;
my $zone = shift @ARGV;
-my $servers = YAML::LoadFile("src/${source}");
+my $clusters = YAML::LoadFile("src/${source}");
+my @servers;
-# Initialise server details
-while (my($name,$server) = each %$servers)
+# Initialise cluster details
+while (my($name,$cluster) = each %$clusters)
{
- $server->{name} = $name;
- $server->{bandwidth} = $server->{bandwidth} * 1024 * 1024;
+ if ($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";
$ua->default_header("App-Key", "2cohi62u5haxvqmypk3ljqqrze1jufrh");
$ua->credentials("api.pingdom.com:443", "Pingdom API", $ENV{PINGDOM_USERNAME}, $ENV{PINGDOM_PASSWORD});
- foreach my $server (values %$servers)
+ foreach my $server (@servers)
{
if (my $checkid = $server->{pingdom})
{
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 = ();
# Load the per-country bandwidth details
my $bandwidth = YAML::LoadFile("bandwidth/${source}.yml");
-# Fill in country table and work out which servers each can use
+# 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;
bandwidth => $bandwidth, lat => $lat, lon => $lon
};
- foreach my $server (values %$servers)
+ foreach my $cluster (values %$clusters)
{
- my $match = match_country($server, $code, $continent);
+ my $match = match_country($cluster, $code, $continent);
- if ($server->{status} eq "up" && $match ne "denied")
+ if ($cluster->{status} eq "up" && $match ne "denied")
{
my $priority = $match eq "preferred" ? 20 : 10;
- my $distance = distance($lat, $lon, $server->{lat}, $server->{lon});
+ my $distance = distance($lat, $lon, $cluster->{lat}, $cluster->{lon});
push @mappings, {
- country => $countries{$code}, server => $server,
+ country => $countries{$code}, cluster => $cluster,
priority => $priority, distance => $distance
};
}
# Discard the parsed country database
$countries->delete;
-# Loop over the mappings, trying to assign each country to the
-# nearest server, but subject to the bandwidth limits;
-foreach my $mapping (sort { $b->{priority} <=> $a->{priority} || $a->{distance} <=> $b->{distance} } @mappings)
-{
- my $country = $mapping->{country};
- my $server = $mapping->{server};
+# Allocate each country to a cluster
+allocate_clusters(\@mappings);
- if ($country->{bandwidth} <= $server->{bandwidth} && !exists($country->{server}))
+# 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)
{
- $country->{server} = $server;
- $server->{bandwidth} = $server->{bandwidth} - $country->{bandwidth};
+ delete $country->{cluster};
}
-}
-# Loop over the mappings again, assigning anything that is left
-# as best we can, and allowing bandwidth limits to be exeeded
-foreach my $mapping (sort { $b->{priority} <=> $a->{priority} || $a->{distance} <=> $b->{distance} } @mappings)
-{
- my $country = $mapping->{country};
- my $server = $mapping->{server};
+ # 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;
+ }
- $country->{server} = $server unless exists($country->{server});
+ # Try the allocate again
+ allocate_clusters(\@mappings);
}
# Create JSON collection object
# Output details for each country
foreach my $country (values %countries)
{
- my $server = $country->{server};
+ my $cluster = $country->{cluster};
my $clon = $country->{lon};
my $clat = $country->{lat};
- my $slon = $server->{lon};
- my $slat = $server->{lat};
+ my $slon = $cluster->{lon};
+ my $slat = $cluster->{lat};
if ($clon > 0 && $slon < 0 && 360 + $slon - $clon < $clon - $slon)
{
$clon = $clon + 360;
}
- $zonefile->print("C\L$country->{code}\E.${zone}:$server->{name}.${zone}:600\n");
+ $zonefile->print("# $country->{name}\n");
+ $zonefile->print("C\L$country->{code}\E.${zone}:$cluster->{name}.${zone}:600\n");
push @json, {
type => "Feature",
coordinates => [ [ $clon, $clat ], [ $slon, $slat ] ]
},
properties => {
- country => $country->{name}
+ country => $country->{name},
+ server => $cluster->{name},
+ colour => $cluster->{colour}
}
};
}
# Output default records for IPs that can't be mapped to a country
-foreach my $server (grep { $servers->{$_}->{default} } keys %$servers)
+foreach my $cluster (grep { $clusters->{$_}->{default} } keys %$clusters)
+{
+ $zonefile->print("# Unknown countries\n");
+ $zonefile->print("Cxx.${zone}:${cluster}.${zone}:600\n");
+}
+
+$zonefile->print("# Servers\n");
+
+# Output A records for each cluster
+while (my($name,$cluster) = each %$clusters)
{
- $zonefile->print("Cxx.${zone}:${server}.${zone}:600\n");
+ 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
}
#
-# Match a country against a server
+# 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->{denied} &&
- $server->{denied}->{countries} &&
- grep { $_ eq $country } @{$server->{preferred}->{countries}})
+ elsif ($cluster->{denied} &&
+ $cluster->{denied}->{countries} &&
+ grep { $_ eq $country } @{$cluster->{preferred}->{countries}})
{
$match = "denied";
}
- elsif ($server->{denied} &&
- $server->{denied}->{continents} &&
- grep { $_ eq $continent } @{$server->{preferred}->{continents}})
+ elsif ($cluster->{denied} &&
+ $cluster->{denied}->{continents} &&
+ grep { $_ eq $continent } @{$cluster->{preferred}->{continents}})
{
$match = "denied";
}
- elsif ($server->{allowed})
+ elsif ($cluster->{allowed})
{
$match = "denied";
}
return great_circle_distance($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