PVE/Network/SDN/Controllers/EvpnPlugin.pm

   1 package PVE::Network::SDN::Controllers::EvpnPlugin;
   2
   3 use strict;
   4 use warnings;
   5
   6 use PVE::INotify;
   7 use PVE::JSONSchema qw(get_standard_option);
   8 use PVE::Tools qw(run_command file_set_contents file_get_contents);
   9
  10 use PVE::Network::SDN::Controllers::Plugin;
  11 use PVE::Network::SDN::Zones::Plugin;
  12 use Net::IP;
  13
  14 use base('PVE::Network::SDN::Controllers::Plugin');
  15
  16 sub type {
  17     return 'evpn';
  18 }
  19
  20 sub properties {
  21     return {
  22         asn => {
  23             type => 'integer',
  24             description => "autonomous system number",
  25             minimum => 0,
  26             maximum => 4294967296
  27         },
  28         peers => {
  29             description => "peers address list.",
  30             type => 'string', format => 'ip-list'
  31         },
  32     };
  33 }
  34
  35 sub options {
  36     return {
  37         'asn' => { optional => 0 },
  38         'peers' => { optional => 0 },
  39     };
  40 }
  41
  42 # Plugin implementation
  43 sub generate_controller_config {
  44     my ($class, $plugin_config, $controller_cfg, $id, $uplinks, $config) = @_;
  45
  46     my @peers;
  47     @peers = PVE::Tools::split_list($plugin_config->{'peers'}) if $plugin_config->{'peers'};
  48
  49     my $local_node = PVE::INotify::nodename();
  50
  51     my $asn = $plugin_config->{asn};
  52     my $ebgp = undef;
  53     my $loopback = undef;
  54     my $autortas = undef;
  55     my $bgprouter = find_bgp_controller($local_node, $controller_cfg);
  56     if ($bgprouter) {
  57         $ebgp = 1 if $plugin_config->{'asn'} ne $bgprouter->{asn};
  58         $loopback = $bgprouter->{loopback} if $bgprouter->{loopback};
  59         $asn = $bgprouter->{asn} if $bgprouter->{asn};
  60         $autortas = $plugin_config->{'asn'} if $ebgp;
  61     }
  62
  63     return if !$asn;
  64
  65     my $bgp = $config->{frr}->{router}->{"bgp $asn"} //= {};
  66
  67     my ($ifaceip, $interface) = PVE::Network::SDN::Zones::Plugin::find_local_ip_interface_peers(\@peers, $loopback);
  68
  69     my $remoteas = $ebgp ? "external" : $asn;
  70
  71     #global options
  72     my @controller_config = (
  73         "bgp router-id $ifaceip",
  74         "no bgp default ipv4-unicast",
  75         "coalesce-time 1000",
  76     );
  77
  78     push(@{$bgp->{""}}, @controller_config) if keys %{$bgp} == 0;
  79
  80     @controller_config = ();
  81
  82     #VTEP neighbors
  83     push @controller_config, "neighbor VTEP peer-group";
  84     push @controller_config, "neighbor VTEP remote-as $remoteas";
  85     push @controller_config, "neighbor VTEP bfd";
  86
  87     if($ebgp && $loopback) {
  88         push @controller_config, "neighbor VTEP ebgp-multihop 10";
  89         push @controller_config, "neighbor VTEP update-source $loopback";
  90     }
  91
  92     # VTEP peers
  93     foreach my $address (@peers) {
  94         next if $address eq $ifaceip;
  95         push @controller_config, "neighbor $address peer-group VTEP";
  96     }
  97
  98     push(@{$bgp->{""}}, @controller_config);
  99
 100     # address-family l2vpn
 101     @controller_config = ();
 102     push @controller_config, "neighbor VTEP route-map MAP_VTEP_IN in";
 103     push @controller_config, "neighbor VTEP route-map MAP_VTEP_OUT out";
 104     push @controller_config, "neighbor VTEP activate";
 105     push @controller_config, "advertise-all-vni";
 106     push @controller_config, "autort as $autortas" if $autortas;
 107     push(@{$bgp->{"address-family"}->{"l2vpn evpn"}}, @controller_config);
 108
 109     my $routemap = { rule => undef, action => "permit" };
 110     push(@{$config->{frr_routemap}->{'MAP_VTEP_IN'}}, $routemap );
 111     push(@{$config->{frr_routemap}->{'MAP_VTEP_OUT'}}, $routemap );
 112
 113     return $config;
 114 }
 115
 116 sub generate_controller_zone_config {
 117     my ($class, $plugin_config, $controller, $controller_cfg, $id, $uplinks, $config) = @_;
 118
 119     my $local_node = PVE::INotify::nodename();
 120
 121     my $vrf = "vrf_$id";
 122     my $vrfvxlan = $plugin_config->{'vrf-vxlan'};
 123     my $exitnodes = $plugin_config->{'exitnodes'};
 124     my $exitnodes_primary = $plugin_config->{'exitnodes-primary'};
 125     my $advertisesubnets = $plugin_config->{'advertise-subnets'};
 126     my $exitnodes_local_routing = $plugin_config->{'exitnodes-local-routing'};
 127     my $rt_import;
 128     $rt_import = [PVE::Tools::split_list($plugin_config->{'rt-import'})] if $plugin_config->{'rt-import'};
 129
 130     my $asn = $controller->{asn};
 131     my @peers;
 132     @peers = PVE::Tools::split_list($controller->{'peers'}) if $controller->{'peers'};
 133     my $ebgp = undef;
 134     my $loopback = undef;
 135     my $autortas = undef;
 136     my $bgprouter = find_bgp_controller($local_node, $controller_cfg);
 137     if($bgprouter) {
 138         $ebgp = 1 if $controller->{'asn'} ne $bgprouter->{asn};
 139         $loopback = $bgprouter->{loopback} if $bgprouter->{loopback};
 140         $asn = $bgprouter->{asn} if $bgprouter->{asn};
 141         $autortas = $controller->{'asn'} if $ebgp;
 142     }
 143
 144     return if !$vrf || !$vrfvxlan || !$asn;
 145
 146     my ($ifaceip, $interface) = PVE::Network::SDN::Zones::Plugin::find_local_ip_interface_peers(\@peers, $loopback);
 147
 148     # vrf
 149     my @controller_config = ();
 150     push @controller_config, "vni $vrfvxlan";
 151     push(@{$config->{frr}->{vrf}->{"$vrf"}}, @controller_config);
 152
 153     #main vrf router
 154     @controller_config = ();
 155     push @controller_config, "bgp router-id $ifaceip";
 156 #    push @controller_config, "!";
 157     push(@{$config->{frr}->{router}->{"bgp $asn vrf $vrf"}->{""}}, @controller_config);
 158
 159     if ($autortas) {
 160         push(@{$config->{frr}->{router}->{"bgp $asn vrf $vrf"}->{"address-family"}->{"l2vpn evpn"}}, "route-target import $autortas:$vrfvxlan");
 161         push(@{$config->{frr}->{router}->{"bgp $asn vrf $vrf"}->{"address-family"}->{"l2vpn evpn"}}, "route-target export $autortas:$vrfvxlan");
 162     }
 163
 164     my $is_gateway = $exitnodes->{$local_node};
 165
 166     if ($is_gateway) {
 167
 168         if (!$exitnodes_primary || $exitnodes_primary eq $local_node) {
 169             #filter default type5 route coming from other exit nodes on primary node or both nodes if no primary is defined.
 170             my $routemap_config = ();
 171             push @{$routemap_config}, "match evpn route-type prefix";
 172             my $routemap = { rule => $routemap_config, action => "deny" };
 173             unshift(@{$config->{frr_routemap}->{'MAP_VTEP_IN'}}, $routemap);
 174         } elsif ($exitnodes_primary ne $local_node) {
 175             my $routemap_config = ();
 176             push @{$routemap_config}, "match evpn vni $vrfvxlan";
 177             push @{$routemap_config}, "match evpn route-type prefix";
 178             push @{$routemap_config}, "set metric 200";
 179             my $routemap = { rule => $routemap_config, action => "permit" };
 180             unshift(@{$config->{frr_routemap}->{'MAP_VTEP_OUT'}}, $routemap);
 181         }
 182
 183
 184         if (!$exitnodes_local_routing) {
 185             @controller_config = ();
 186             #import /32 routes of evpn network from vrf1 to default vrf (for packet return)
 187             push @controller_config, "import vrf $vrf";
 188             push(@{$config->{frr}->{router}->{"bgp $asn"}->{"address-family"}->{"ipv4 unicast"}}, @controller_config);
 189             push(@{$config->{frr}->{router}->{"bgp $asn"}->{"address-family"}->{"ipv6 unicast"}}, @controller_config);
 190
 191             @controller_config = ();
 192             #redistribute connected to be able to route to local vms on the gateway
 193             push @controller_config, "redistribute connected";
 194             push(@{$config->{frr}->{router}->{"bgp $asn vrf $vrf"}->{"address-family"}->{"ipv4 unicast"}}, @controller_config);
 195             push(@{$config->{frr}->{router}->{"bgp $asn vrf $vrf"}->{"address-family"}->{"ipv6 unicast"}}, @controller_config);
 196         }
 197
 198         @controller_config = ();
 199         #add default originate to announce 0.0.0.0/0 type5 route in evpn
 200         push @controller_config, "default-originate ipv4";
 201         push @controller_config, "default-originate ipv6";
 202         push(@{$config->{frr}->{router}->{"bgp $asn vrf $vrf"}->{"address-family"}->{"l2vpn evpn"}}, @controller_config);
 203     } elsif ($advertisesubnets) {
 204
 205         @controller_config = ();
 206         #redistribute connected networks
 207         push @controller_config, "redistribute connected";
 208         push(@{$config->{frr}->{router}->{"bgp $asn vrf $vrf"}->{"address-family"}->{"ipv4 unicast"}}, @controller_config);
 209         push(@{$config->{frr}->{router}->{"bgp $asn vrf $vrf"}->{"address-family"}->{"ipv6 unicast"}}, @controller_config);
 210
 211         @controller_config = ();
 212         #advertise connected networks type5 route in evpn
 213         push @controller_config, "advertise ipv4 unicast";
 214         push @controller_config, "advertise ipv6 unicast";
 215         push(@{$config->{frr}->{router}->{"bgp $asn vrf $vrf"}->{"address-family"}->{"l2vpn evpn"}}, @controller_config);
 216     }
 217
 218     if ($rt_import) {
 219         @controller_config = ();
 220         foreach my $rt (sort @{$rt_import}) {
 221             push @controller_config, "route-target import $rt";
 222         }
 223         push(@{$config->{frr}->{router}->{"bgp $asn vrf $vrf"}->{"address-family"}->{"l2vpn evpn"}}, @controller_config);
 224     }
 225
 226     return $config;
 227 }
 228
 229 sub generate_controller_vnet_config {
 230     my ($class, $plugin_config, $controller, $zone, $zoneid, $vnetid, $config) = @_;
 231
 232     my $exitnodes = $zone->{'exitnodes'};
 233     my $exitnodes_local_routing = $zone->{'exitnodes-local-routing'};
 234
 235     return if !$exitnodes_local_routing;
 236
 237     my $local_node = PVE::INotify::nodename();
 238     my $is_gateway = $exitnodes->{$local_node};
 239
 240     return if !$is_gateway;
 241
 242     my $subnets = PVE::Network::SDN::Vnets::get_subnets($vnetid, 1);
 243     my @controller_config = ();
 244     foreach my $subnetid (sort keys %{$subnets}) {
 245         my $subnet = $subnets->{$subnetid};
 246         my $cidr = $subnet->{cidr};
 247         push @controller_config, "ip route $cidr 10.255.255.2 xvrf_$zoneid";
 248     }
 249     push(@{$config->{frr}->{''}}, @controller_config);
 250 }
 251
 252 sub on_delete_hook {
 253     my ($class, $controllerid, $zone_cfg) = @_;
 254
 255     # verify that zone is associated to this controller
 256     foreach my $id (keys %{$zone_cfg->{ids}}) {
 257         my $zone = $zone_cfg->{ids}->{$id};
 258         die "controller $controllerid is used by $id"
 259             if (defined($zone->{controller}) && $zone->{controller} eq $controllerid);
 260     }
 261 }
 262
 263 sub on_update_hook {
 264     my ($class, $controllerid, $controller_cfg) = @_;
 265
 266     # we can only have 1 evpn controller / 1 asn by server
 267
 268     my $controllernb = 0;
 269     foreach my $id (keys %{$controller_cfg->{ids}}) {
 270         next if $id eq $controllerid;
 271         my $controller = $controller_cfg->{ids}->{$id};
 272         next if $controller->{type} ne "evpn";
 273         $controllernb++;
 274         die "only 1 global evpn controller can be defined" if $controllernb > 1;
 275     }
 276 }
 277
 278 sub find_bgp_controller {
 279     my ($nodename, $controller_cfg) = @_;
 280
 281     my $controller = undef;
 282     foreach my $id  (keys %{$controller_cfg->{ids}}) {
 283         $controller = $controller_cfg->{ids}->{$id};
 284         next if $controller->{type} ne 'bgp';
 285         next if $controller->{node} ne $nodename;
 286         last;
 287     }
 288
 289     return $controller;
 290 }
 291
 292
 293 sub sort_frr_config {
 294     my $order = {};
 295     $order->{''} = 0;
 296     $order->{'vrf'} = 1;
 297     $order->{'ipv4 unicast'} = 1;
 298     $order->{'ipv6 unicast'} = 2;
 299     $order->{'l2vpn evpn'} = 3;
 300
 301     my $a_val = 100;
 302     my $b_val = 100;
 303
 304     $a_val = $order->{$a} if defined($order->{$a});
 305     $b_val = $order->{$b} if defined($order->{$b});
 306
 307     if ($a =~ /bgp (\d+)$/) {
 308         $a_val = 2;
 309     }
 310
 311     if ($b =~ /bgp (\d+)$/) {
 312         $b_val = 2;
 313     }
 314
 315     return $a_val <=> $b_val;
 316 }
 317
 318 sub generate_frr_recurse{
 319    my ($final_config, $content, $parentkey, $level) = @_;
 320
 321    my $keylist = {};
 322    $keylist->{vrf} = 1;
 323    $keylist->{'address-family'} = 1;
 324    $keylist->{router} = 1;
 325
 326    my $exitkeylist = {};
 327    $exitkeylist->{vrf} = 1;
 328    $exitkeylist->{'address-family'} = 1;
 329
 330    my $simple_exitkeylist = {};
 331    $simple_exitkeylist->{router} = 1;
 332
 333    # FIXME: make this generic
 334    my $paddinglevel = undef;
 335    if ($level == 1 || $level == 2) {
 336         $paddinglevel = $level - 1;
 337    } elsif ($level == 3 || $level ==  4) {
 338         $paddinglevel = $level - 2;
 339    }
 340
 341    my $padding = "";
 342    $padding = ' ' x ($paddinglevel) if $paddinglevel;
 343
 344    if (ref $content eq  'HASH') {
 345         foreach my $key (sort sort_frr_config keys %$content) {
 346             if ($parentkey && defined($keylist->{$parentkey})) {
 347                 push @{$final_config}, $padding."!";
 348                 push @{$final_config}, $padding."$parentkey $key";
 349             } elsif ($key ne '' && !defined($keylist->{$key})) {
 350                 push @{$final_config}, $padding."$key";
 351             }
 352
 353             my $option = $content->{$key};
 354             generate_frr_recurse($final_config, $option, $key, $level+1);
 355
 356             push @{$final_config}, $padding."exit-$parentkey" if $parentkey && defined($exitkeylist->{$parentkey});
 357             push @{$final_config}, $padding."exit" if $parentkey && defined($simple_exitkeylist->{$parentkey});
 358         }
 359     }
 360
 361     if (ref $content eq 'ARRAY') {
 362         push @{$final_config}, map { $padding . "$_" } @$content;
 363     }
 364 }
 365
 366 sub generate_frr_routemap {
 367    my ($final_config, $routemaps) = @_;
 368
 369    foreach my $id (sort keys %$routemaps) {
 370
 371         my $routemap = $routemaps->{$id};
 372         my $order = 0;
 373         foreach my $seq (@$routemap) {
 374                 $order++;
 375                 next if !defined($seq->{action});
 376                 my @config = ();
 377                 push @config, "!";
 378                 push @config, "route-map $id $seq->{action} $order";
 379                 my $rule = $seq->{rule};
 380                 push @config, map { " $_" } @$rule;
 381                 push @{$final_config}, @config;
 382                 push @{$final_config}, "exit";
 383         }
 384    }
 385 }
 386
 387 sub generate_frr_accesslist {
 388     my ($final_config, $accesslists) = @_;
 389
 390     my $config = [];
 391
 392     for my $id (sort keys %$accesslists) {
 393         my $accesslist = $accesslists->{$id};
 394
 395         for my $seq (sort keys %$accesslist) {
 396             my $rule = $accesslist->{$seq};
 397             push @$config, "access-list $id seq $seq $rule";
 398         }
 399     }
 400
 401     if (@$config > 0) {
 402         push @{$final_config}, "!", @$config;
 403     }
 404 }
 405
 406 sub generate_controller_rawconfig {
 407     my ($class, $plugin_config, $config) = @_;
 408
 409     my $nodename = PVE::INotify::nodename();
 410
 411     my $final_config = [];
 412     push @{$final_config}, "frr version 8.2.2";
 413     push @{$final_config}, "frr defaults datacenter";
 414     push @{$final_config}, "hostname $nodename";
 415     push @{$final_config}, "log syslog informational";
 416     push @{$final_config}, "service integrated-vtysh-config";
 417     push @{$final_config}, "!";
 418
 419     if (-e "/etc/frr/frr.conf.local") {
 420         my $local_conf = file_get_contents("/etc/frr/frr.conf.local");
 421         parse_merge_frr_local_config($config, $local_conf);
 422     }
 423
 424     generate_frr_recurse($final_config, $config->{frr}, undef, 0);
 425     generate_frr_accesslist($final_config, $config->{frr_access_list});
 426     generate_frr_routemap($final_config, $config->{frr_routemap});
 427
 428     push @{$final_config}, "!";
 429     push @{$final_config}, "line vty";
 430     push @{$final_config}, "!";
 431
 432     my $rawconfig = join("\n", @{$final_config});
 433
 434     return if !$rawconfig;
 435     return $rawconfig;
 436 }
 437
 438 sub parse_merge_frr_local_config {
 439     my ($config, $local_conf) = @_;
 440
 441     my $section = \$config->{""};
 442     my $router = undef;
 443     my $routemap = undef;
 444     my $routemap_config = ();
 445     my $routemap_action = undef;
 446
 447     while ($local_conf =~ /^\s*(.+?)\s*$/gm) {
 448         my $line = $1;
 449         $line =~ s/^\s+|\s+$//g;
 450
 451         if ($line =~ m/^router (.+)$/) {
 452             $router = $1;
 453             $section = \$config->{'frr'}->{'router'}->{$router}->{""};
 454             next;
 455         } elsif ($line =~ m/^vrf (.+)$/) {
 456             $section = \$config->{'frr'}->{'vrf'}->{$1};
 457             next;
 458         } elsif ($line =~ m/address-family (.+)$/) {
 459             $section = \$config->{'frr'}->{'router'}->{$router}->{'address-family'}->{$1};
 460             next;
 461         } elsif ($line =~ m/^route-map (.+) (permit|deny) (\d+)/) {
 462             $routemap = $1;
 463             $routemap_config = ();
 464             $routemap_action = $2;
 465             $section = \$config->{'frr_routemap'}->{$routemap};
 466             next;
 467         } elsif ($line =~ m/^access-list (.+) seq (\d+) (.+)$/) {
 468             $config->{'frr_access_list'}->{$1}->{$2} = $3;
 469             next;
 470         } elsif($line =~ m/^exit-address-family$/) {
 471             next;
 472         } elsif($line =~ m/^exit$/) {
 473             if($router) {
 474                 $section = \$config->{''};
 475                 $router = undef;
 476             } elsif($routemap) {
 477                 push(@{$$section}, { rule => $routemap_config, action => $routemap_action });
 478                 $section = \$config->{''};
 479                 $routemap = undef;
 480                 $routemap_action = undef;
 481                 $routemap_config = ();
 482             }
 483             next;
 484         } elsif($line =~ m/!/) {
 485             next;
 486         }
 487
 488         next if !$section;
 489         if($routemap) {
 490             push(@{$routemap_config}, $line);
 491         } else {
 492             push(@{$$section}, $line);
 493         }
 494     }
 495 }
 496
 497 sub write_controller_config {
 498     my ($class, $plugin_config, $config) = @_;
 499
 500     my $rawconfig = $class->generate_controller_rawconfig($plugin_config, $config);
 501     return if !$rawconfig;
 502     return if !-d "/etc/frr";
 503
 504     file_set_contents("/etc/frr/frr.conf", $rawconfig);
 505 }
 506
 507 sub reload_controller {
 508     my ($class) = @_;
 509
 510     my $conf_file = "/etc/frr/frr.conf";
 511     my $bin_path = "/usr/lib/frr/frr-reload.py";
 512
 513     if (!-e $bin_path) {
 514         warn "missing $bin_path. Please install frr-pythontools package";
 515         return;
 516     }
 517
 518     my $err = sub {
 519         my $line = shift;
 520         if ($line =~ /ERROR:/) {
 521             warn "$line \n";
 522         }
 523     };
 524
 525     if (-e $conf_file && -e $bin_path) {
 526         eval {
 527             run_command([$bin_path, '--stdout', '--reload', $conf_file], outfunc => {}, errfunc => $err);
 528         };
 529         if ($@) {
 530             warn "frr reload command fail. Restarting frr.";
 531             eval { run_command(['systemctl', 'restart', 'frr']); };
 532         }
 533     }
 534 }
 535
 536 1;
 537
 538