PVE/Network/SDN/Controllers/EvpnPlugin.pm

   1 package PVE::Network::SDN::Controllers::EvpnPlugin;
   2
   3 use strict;
   4 use warnings;
   5 use PVE::Network::SDN::Controllers::Plugin;
   6 use PVE::Tools qw(run_command);
   7 use PVE::INotify;
   8 use PVE::JSONSchema qw(get_standard_option);
   9
  10 use base('PVE::Network::SDN::Controllers::Plugin');
  11
  12 sub type {
  13     return 'evpn';
  14 }
  15
  16 sub properties {
  17     return {
  18         'asn' => {
  19             type => 'integer',
  20             description => "autonomous system number",
  21         },
  22         'peers' => {
  23             description => "peers address list.",
  24             type => 'string', format => 'ip-list'
  25         },
  26         'gateway-nodes' => get_standard_option('pve-node-list'),
  27         'gateway-external-peers' => {
  28             description => "upstream bgp peers address list.",
  29             type => 'string', format => 'ip-list'
  30         },
  31     };
  32 }
  33
  34 sub options {
  35
  36     return {
  37         'asn' => { optional => 0 },
  38         'peers' => { optional => 0 },
  39         'gateway-nodes' => { optional => 1 },
  40         'gateway-external-peers' => { optional => 1 },
  41     };
  42 }
  43
  44 sub get_local_route_ip {
  45     my ($targetip) = @_;
  46
  47     my $ip = undef;
  48     my $interface = undef;
  49
  50     run_command(['/sbin/ip', 'route', 'get', $targetip], outfunc => sub {
  51         if ($_[0] =~ m/src ($PVE::Tools::IPRE)/) {
  52             $ip = $1;
  53         }
  54         if ($_[0] =~ m/dev (\S+)/) {
  55             $interface = $1;
  56         }
  57
  58     });
  59     return ($ip, $interface);
  60 }
  61
  62 sub find_local_ip_interface {
  63     my ($peers) = @_;
  64
  65     my $network_config = PVE::INotify::read_file('interfaces');
  66     my $ifaces = $network_config->{ifaces};
  67     #is a local ip member of peers list ?
  68     foreach my $address (@{$peers}) {
  69         while (my $interface = each %$ifaces) {
  70             my $ip = $ifaces->{$interface}->{address};
  71             if ($ip && $ip eq $address) {
  72                 return ($ip, $interface);
  73             }
  74         }
  75     }
  76
  77     #if peer is remote, find source with ip route
  78     foreach my $address (@{$peers}) {
  79         my ($ip, $interface) = get_local_route_ip($address);
  80         return ($ip, $interface);
  81     }
  82 }
  83
  84 # Plugin implementation
  85 sub generate_controller_config {
  86     my ($class, $plugin_config, $controller, $id, $uplinks, $config) = @_;
  87
  88     my @peers = split(',', $plugin_config->{'peers'}) if $plugin_config->{'peers'};
  89
  90     my $asn = $plugin_config->{asn};
  91     my $gatewaynodes = $plugin_config->{'gateway-nodes'};
  92     my @gatewaypeers = split(',', $plugin_config->{'gateway-external-peers'}) if $plugin_config->{'gateway-external-peers'};
  93
  94     return if !$asn;
  95
  96     my ($ifaceip, $interface) = find_local_ip_interface(\@peers);
  97
  98     my $is_gateway = undef;
  99     my $local_node = PVE::INotify::nodename();
 100
 101     foreach my $gatewaynode (PVE::Tools::split_list($gatewaynodes)) {
 102         $is_gateway = 1 if $gatewaynode eq $local_node;
 103     }
 104
 105     my @controller_config = ();
 106
 107     push @controller_config, "bgp router-id $ifaceip";
 108     push @controller_config, "no bgp default ipv4-unicast";
 109     push @controller_config, "coalesce-time 1000";
 110
 111     foreach my $address (@peers) {
 112         next if $address eq $ifaceip;
 113         push @controller_config, "neighbor $address remote-as $asn";
 114     }
 115
 116     if ($is_gateway) {
 117         foreach my $address (@gatewaypeers) {
 118             push @controller_config, "neighbor $address remote-as external";
 119         }
 120     }
 121     push(@{$config->{frr}->{router}->{"bgp $asn"}->{""}}, @controller_config);
 122
 123     @controller_config = ();
 124     foreach my $address (@peers) {
 125         next if $address eq $ifaceip;
 126         push @controller_config, "neighbor $address activate";
 127     }
 128     push @controller_config, "advertise-all-vni";
 129     push(@{$config->{frr}->{router}->{"bgp $asn"}->{"address-family"}->{"l2vpn evpn"}}, @controller_config);
 130
 131     if ($is_gateway) {
 132
 133         @controller_config = ();
 134         #import /32 routes of evpn network from vrf1 to default vrf (for packet return)
 135         foreach my $address (@gatewaypeers) {
 136             push @controller_config, "neighbor $address activate";
 137         }
 138         push(@{$config->{frr}->{router}->{"bgp $asn"}->{"address-family"}->{"ipv4 unicast"}}, @controller_config);
 139         push(@{$config->{frr}->{router}->{"bgp $asn"}->{"address-family"}->{"ipv6 unicast"}}, @controller_config);
 140
 141     }
 142
 143     return $config;
 144 }
 145
 146 sub generate_controller_zone_config {
 147     my ($class, $plugin_config, $controller, $id, $uplinks, $config) = @_;
 148
 149     my $vrf = $id;
 150     my $vrfvxlan = $plugin_config->{'vrf-vxlan'};
 151     my $asn = $controller->{asn};
 152     my $gatewaynodes = $controller->{'gateway-nodes'};
 153
 154     return if !$vrf || !$vrfvxlan || !$asn;
 155
 156     #vrf
 157     my @controller_config = ();
 158     push @controller_config, "vni $vrfvxlan";
 159     push(@{$config->{frr}->{vrf}->{"$vrf"}}, @controller_config);
 160
 161     push(@{$config->{frr}->{router}->{"bgp $asn vrf $vrf"}->{""}}, "!");
 162
 163     @controller_config = ();
 164
 165     my $is_gateway = undef;
 166     my $local_node = PVE::INotify::nodename();
 167
 168     foreach my $gatewaynode (PVE::Tools::split_list($gatewaynodes)) {
 169         $is_gateway = 1 if $gatewaynode eq $local_node;
 170     }
 171
 172     if ($is_gateway) {
 173
 174         @controller_config = ();
 175         #import /32 routes of evpn network from vrf1 to default vrf (for packet return)
 176         push @controller_config, "import vrf $vrf";
 177         push(@{$config->{frr}->{router}->{"bgp $asn"}->{"address-family"}->{"ipv4 unicast"}}, @controller_config);
 178         push(@{$config->{frr}->{router}->{"bgp $asn"}->{"address-family"}->{"ipv6 unicast"}}, @controller_config);
 179
 180         @controller_config = ();
 181         #redistribute connected to be able to route to local vms on the gateway
 182         push @controller_config, "redistribute connected";
 183         push(@{$config->{frr}->{router}->{"bgp $asn vrf $vrf"}->{"address-family"}->{"ipv4 unicast"}}, @controller_config);
 184         push(@{$config->{frr}->{router}->{"bgp $asn vrf $vrf"}->{"address-family"}->{"ipv6 unicast"}}, @controller_config);
 185
 186         @controller_config = ();
 187         #add default originate to announce 0.0.0.0/0 type5 route in evpn
 188         push @controller_config, "default-originate ipv4";
 189         push @controller_config, "default-originate ipv6";
 190         push(@{$config->{frr}->{router}->{"bgp $asn vrf $vrf"}->{"address-family"}->{"l2vpn evpn"}}, @controller_config);
 191     }
 192
 193     return $config;
 194 }
 195
 196 sub on_delete_hook {
 197     my ($class, $controllerid, $zone_cfg) = @_;
 198
 199     # verify that zone is associated to this controller
 200     foreach my $id (keys %{$zone_cfg->{ids}}) {
 201         my $zone = $zone_cfg->{ids}->{$id};
 202         die "controller $controllerid is used by $id"
 203             if (defined($zone->{controller}) && $zone->{controller} eq $controllerid);
 204     }
 205 }
 206
 207 sub on_update_hook {
 208     my ($class, $controllerid, $controller_cfg) = @_;
 209
 210     # verify that asn is not already used by another controller
 211     my $asn = $controller_cfg->{ids}->{$controllerid}->{asn};
 212     foreach my $id (keys %{$controller_cfg->{ids}}) {
 213         next if $id eq $controllerid;
 214         my $controller = $controller_cfg->{ids}->{$id};
 215         die "asn $asn is already used by $id"
 216             if (defined($controller->{asn}) && $controller->{asn} eq $asn);
 217     }
 218 }
 219
 220 sub sort_frr_config {
 221     my $order = {};
 222     $order->{''} = 0;
 223     $order->{'vrf'} = 1;
 224     $order->{'ipv4 unicast'} = 1;
 225     $order->{'ipv6 unicast'} = 2;
 226     $order->{'l2vpn evpn'} = 3;
 227
 228     my $a_val = 100;
 229     my $b_val = 100;
 230
 231     $a_val = $order->{$a} if defined($order->{$a});
 232     $b_val = $order->{$b} if defined($order->{$b});
 233
 234     if($a =~ /bgp (\d+)$/) {
 235         $a_val = 2;
 236     }
 237
 238     if($b =~ /bgp (\d+)$/) {
 239         $b_val = 2;
 240     }
 241
 242     return $a_val <=> $b_val;
 243 }
 244
 245 sub generate_frr_recurse{
 246    my ($final_config, $content, $parentkey, $level) = @_;
 247
 248    my $keylist = {};
 249    $keylist->{vrf} = 1;
 250    $keylist->{'address-family'} = 1;
 251    $keylist->{router} = 1;
 252
 253    my $exitkeylist = {};
 254    $exitkeylist->{vrf} = 1;
 255    $exitkeylist->{'address-family'} = 1;
 256
 257    #fix me, make this generic
 258    my $paddinglevel = undef;
 259    if($level == 1 || $level == 2) {
 260      $paddinglevel = $level - 1;
 261    } elsif ($level == 3 || $level ==  4) {
 262      $paddinglevel = $level - 2;
 263    }
 264
 265    my $padding = "";
 266    $padding = ' ' x ($paddinglevel) if $paddinglevel;
 267
 268    if (ref $content eq ref {}) {
 269         foreach my $key (sort sort_frr_config keys %$content) {
 270             if ($parentkey && defined($keylist->{$parentkey})) {
 271                     push @{$final_config}, $padding."!";
 272                     push @{$final_config}, $padding."$parentkey $key";
 273             } else {
 274                     push @{$final_config}, $padding."$key" if $key ne '' && !defined($keylist->{$key});
 275             }
 276
 277             my $option = $content->{$key};
 278             generate_frr_recurse($final_config, $option, $key, $level+1);
 279
 280             push @{$final_config}, $padding."exit-$parentkey" if $parentkey && defined($exitkeylist->{$parentkey});
 281         }
 282     }
 283
 284     if (ref $content eq 'ARRAY') {
 285         foreach my $value (@$content) {
 286             push @{$final_config}, $padding."$value";
 287         }
 288     }
 289 }
 290
 291 sub write_controller_config {
 292     my ($class, $plugin_config, $config) = @_;
 293
 294     my $nodename = PVE::INotify::nodename();
 295
 296     my $final_config = [];
 297     push @{$final_config}, "log syslog informational";
 298     push @{$final_config}, "ip forwarding";
 299     push @{$final_config}, "ipv6 forwarding";
 300     push @{$final_config}, "frr defaults traditional";
 301     push @{$final_config}, "service integrated-vtysh-config";
 302     push @{$final_config}, "hostname $nodename";
 303     push @{$final_config}, "!";
 304
 305     generate_frr_recurse($final_config, $config->{frr}, undef, 0);
 306
 307     push @{$final_config}, "!";
 308     push @{$final_config}, "line vty";
 309     push @{$final_config}, "!";
 310
 311     my $rawconfig = join("\n", @{$final_config});
 312
 313
 314     return if !$rawconfig;
 315     return if !-d "/etc/frr";
 316
 317     my $frr_config_file = "/etc/frr/frr.conf";
 318
 319     my $writefh = IO::File->new($frr_config_file,">");
 320     print $writefh $rawconfig;
 321     $writefh->close();
 322 }
 323
 324 sub reload_controller {
 325     my ($class) = @_;
 326
 327     my $conf_file = "/etc/frr/frr.conf";
 328     my $bin_path = "/usr/lib/frr/frr-reload.py";
 329
 330     if (!-e $bin_path) {
 331         warn "missing $bin_path. Please install frr-pythontools package";
 332         return;
 333     }
 334
 335     my $err = sub {
 336         my $line = shift;
 337         if ($line =~ /ERROR:/) {
 338             warn "$line \n";
 339         }
 340     };
 341
 342     if (-e $conf_file && -e $bin_path) {
 343         PVE::Tools::run_command([$bin_path, '--stdout', '--reload', $conf_file], outfunc => {}, errfunc => $err);
 344     }
 345 }
 346
 347 1;
 348
 349