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_OUT out";
 103     push @controller_config, "neighbor VTEP activate";
 104     push @controller_config, "advertise-all-vni";
 105     push @controller_config, "autort as $autortas" if $autortas;
 106     push(@{$bgp->{"address-family"}->{"l2vpn evpn"}}, @controller_config);
 107
 108     push(@{$config->{frr_routemap}->{'MAP_VTEP_OUT'}}, []);
 109
 110     return $config;
 111 }
 112
 113 sub generate_controller_zone_config {
 114     my ($class, $plugin_config, $controller, $controller_cfg, $id, $uplinks, $config) = @_;
 115
 116     my $local_node = PVE::INotify::nodename();
 117
 118     my $vrf = "vrf_$id";
 119     my $vrfvxlan = $plugin_config->{'vrf-vxlan'};
 120     my $exitnodes = $plugin_config->{'exitnodes'};
 121     my $exitnodes_primary = $plugin_config->{'exitnodes-primary'};
 122     my $advertisesubnets = $plugin_config->{'advertise-subnets'};
 123     my $exitnodes_local_routing = $plugin_config->{'exitnodes-local-routing'};
 124
 125     my $asn = $controller->{asn};
 126     my $ebgp = undef;
 127     my $loopback = undef;
 128     my $autortas = undef;
 129     my $bgprouter = find_bgp_controller($local_node, $controller_cfg);
 130     if($bgprouter) {
 131         $ebgp = 1 if $controller->{'asn'} ne $bgprouter->{asn};
 132         $loopback = $bgprouter->{loopback} if $bgprouter->{loopback};
 133         $asn = $bgprouter->{asn} if $bgprouter->{asn};
 134         $autortas = $controller->{'asn'} if $ebgp;
 135     }
 136
 137     return if !$vrf || !$vrfvxlan || !$asn;
 138
 139     # vrf
 140     my @controller_config = ();
 141     push @controller_config, "vni $vrfvxlan";
 142     push(@{$config->{frr}->{vrf}->{"$vrf"}}, @controller_config);
 143
 144     #main vrf router
 145     @controller_config = ();
 146     push @controller_config, "no bgp ebgp-requires-policy" if $ebgp;
 147 #    push @controller_config, "!";
 148     push(@{$config->{frr}->{router}->{"bgp $asn vrf $vrf"}->{""}}, @controller_config);
 149
 150     if ($autortas) {
 151         push(@{$config->{frr}->{router}->{"bgp $asn vrf $vrf"}->{"address-family"}->{"l2vpn evpn"}}, "route-target import $autortas:$vrfvxlan");
 152         push(@{$config->{frr}->{router}->{"bgp $asn vrf $vrf"}->{"address-family"}->{"l2vpn evpn"}}, "route-target export $autortas:$vrfvxlan");
 153     }
 154
 155     my $is_gateway = $exitnodes->{$local_node};
 156
 157     if ($is_gateway) {
 158
 159         if($exitnodes_primary && $exitnodes_primary ne $local_node) {
 160             my $routemap_config = ();
 161             push @{$routemap_config}, "match evpn vni $vrfvxlan";
 162             push @{$routemap_config}, "match evpn route-type prefix";
 163             push @{$routemap_config}, "set metric 200";
 164             unshift(@{$config->{frr_routemap}->{'MAP_VTEP_OUT'}}, $routemap_config);
 165         }
 166
 167         if (!$exitnodes_local_routing) {
 168             @controller_config = ();
 169             #import /32 routes of evpn network from vrf1 to default vrf (for packet return)
 170             push @controller_config, "import vrf $vrf";
 171             push(@{$config->{frr}->{router}->{"bgp $asn"}->{"address-family"}->{"ipv4 unicast"}}, @controller_config);
 172             push(@{$config->{frr}->{router}->{"bgp $asn"}->{"address-family"}->{"ipv6 unicast"}}, @controller_config);
 173
 174             @controller_config = ();
 175             #redistribute connected to be able to route to local vms on the gateway
 176             push @controller_config, "redistribute connected";
 177             push(@{$config->{frr}->{router}->{"bgp $asn vrf $vrf"}->{"address-family"}->{"ipv4 unicast"}}, @controller_config);
 178             push(@{$config->{frr}->{router}->{"bgp $asn vrf $vrf"}->{"address-family"}->{"ipv6 unicast"}}, @controller_config);
 179         }
 180
 181         @controller_config = ();
 182         #add default originate to announce 0.0.0.0/0 type5 route in evpn
 183         push @controller_config, "default-originate ipv4";
 184         push @controller_config, "default-originate ipv6";
 185         push(@{$config->{frr}->{router}->{"bgp $asn vrf $vrf"}->{"address-family"}->{"l2vpn evpn"}}, @controller_config);
 186     } elsif ($advertisesubnets) {
 187
 188         @controller_config = ();
 189         #redistribute connected networks
 190         push @controller_config, "redistribute connected";
 191         push(@{$config->{frr}->{router}->{"bgp $asn vrf $vrf"}->{"address-family"}->{"ipv4 unicast"}}, @controller_config);
 192         push(@{$config->{frr}->{router}->{"bgp $asn vrf $vrf"}->{"address-family"}->{"ipv6 unicast"}}, @controller_config);
 193
 194         @controller_config = ();
 195         #advertise connected networks type5 route in evpn
 196         push @controller_config, "advertise ipv4 unicast";
 197         push @controller_config, "advertise ipv6 unicast";
 198         push(@{$config->{frr}->{router}->{"bgp $asn vrf $vrf"}->{"address-family"}->{"l2vpn evpn"}}, @controller_config);
 199     }
 200
 201     return $config;
 202 }
 203
 204 sub generate_controller_vnet_config {
 205     my ($class, $plugin_config, $controller, $zone, $zoneid, $vnetid, $config) = @_;
 206
 207     my $exitnodes = $zone->{'exitnodes'};
 208     my $exitnodes_local_routing = $zone->{'exitnodes-local-routing'};
 209
 210     return if !$exitnodes_local_routing;
 211
 212     my $local_node = PVE::INotify::nodename();
 213     my $is_gateway = $exitnodes->{$local_node};
 214
 215     return if !$is_gateway;
 216
 217     my $subnets = PVE::Network::SDN::Vnets::get_subnets($vnetid, 1);
 218     my @controller_config = ();
 219     foreach my $subnetid (sort keys %{$subnets}) {
 220         my $subnet = $subnets->{$subnetid};
 221         my $cidr = $subnet->{cidr};
 222         push @controller_config, "ip route $cidr 10.255.255.2 xvrf_$zoneid";
 223     }
 224     push(@{$config->{frr}->{''}}, @controller_config);
 225 }
 226
 227 sub on_delete_hook {
 228     my ($class, $controllerid, $zone_cfg) = @_;
 229
 230     # verify that zone is associated to this controller
 231     foreach my $id (keys %{$zone_cfg->{ids}}) {
 232         my $zone = $zone_cfg->{ids}->{$id};
 233         die "controller $controllerid is used by $id"
 234             if (defined($zone->{controller}) && $zone->{controller} eq $controllerid);
 235     }
 236 }
 237
 238 sub on_update_hook {
 239     my ($class, $controllerid, $controller_cfg) = @_;
 240
 241     # we can only have 1 evpn controller / 1 asn by server
 242
 243     my $controllernb = 0;
 244     foreach my $id (keys %{$controller_cfg->{ids}}) {
 245         next if $id eq $controllerid;
 246         my $controller = $controller_cfg->{ids}->{$id};
 247         next if $controller->{type} ne "evpn";
 248         $controllernb++;
 249         die "only 1 global evpn controller can be defined" if $controllernb > 1;
 250     }
 251 }
 252
 253 sub find_bgp_controller {
 254     my ($nodename, $controller_cfg) = @_;
 255
 256     my $controller = undef;
 257     foreach my $id  (keys %{$controller_cfg->{ids}}) {
 258         $controller = $controller_cfg->{ids}->{$id};
 259         next if $controller->{type} ne 'bgp';
 260         next if $controller->{node} ne $nodename;
 261         last;
 262     }
 263
 264     return $controller;
 265 }
 266
 267
 268 sub sort_frr_config {
 269     my $order = {};
 270     $order->{''} = 0;
 271     $order->{'vrf'} = 1;
 272     $order->{'ipv4 unicast'} = 1;
 273     $order->{'ipv6 unicast'} = 2;
 274     $order->{'l2vpn evpn'} = 3;
 275
 276     my $a_val = 100;
 277     my $b_val = 100;
 278
 279     $a_val = $order->{$a} if defined($order->{$a});
 280     $b_val = $order->{$b} if defined($order->{$b});
 281
 282     if ($a =~ /bgp (\d+)$/) {
 283         $a_val = 2;
 284     }
 285
 286     if ($b =~ /bgp (\d+)$/) {
 287         $b_val = 2;
 288     }
 289
 290     return $a_val <=> $b_val;
 291 }
 292
 293 sub generate_frr_recurse{
 294    my ($final_config, $content, $parentkey, $level) = @_;
 295
 296    my $keylist = {};
 297    $keylist->{vrf} = 1;
 298    $keylist->{'address-family'} = 1;
 299    $keylist->{router} = 1;
 300
 301    my $exitkeylist = {};
 302    $exitkeylist->{vrf} = 1;
 303    $exitkeylist->{'address-family'} = 1;
 304
 305    # FIXME: make this generic
 306    my $paddinglevel = undef;
 307    if ($level == 1 || $level == 2) {
 308         $paddinglevel = $level - 1;
 309    } elsif ($level == 3 || $level ==  4) {
 310         $paddinglevel = $level - 2;
 311    }
 312
 313    my $padding = "";
 314    $padding = ' ' x ($paddinglevel) if $paddinglevel;
 315
 316    if (ref $content eq  'HASH') {
 317         foreach my $key (sort sort_frr_config keys %$content) {
 318             if ($parentkey && defined($keylist->{$parentkey})) {
 319                 push @{$final_config}, $padding."!";
 320                 push @{$final_config}, $padding."$parentkey $key";
 321             } elsif ($key ne '' && !defined($keylist->{$key})) {
 322                 push @{$final_config}, $padding."$key";
 323             }
 324
 325             my $option = $content->{$key};
 326             generate_frr_recurse($final_config, $option, $key, $level+1);
 327
 328             push @{$final_config}, $padding."exit-$parentkey" if $parentkey && defined($exitkeylist->{$parentkey});
 329         }
 330     }
 331
 332     if (ref $content eq 'ARRAY') {
 333         push @{$final_config}, map { $padding . "$_" } @$content;
 334     }
 335 }
 336
 337 sub generate_frr_routemap {
 338    my ($final_config, $routemaps) = @_;
 339
 340    foreach my $id (sort keys %$routemaps) {
 341
 342         my $routemap = $routemaps->{$id};
 343         my $order = 0;
 344         foreach my $seq (@$routemap) {
 345                 $order++;
 346                 my @config = ();
 347                 push @config, "!";
 348                 push @config, "route-map $id permit $order";
 349                 push @config, map { " $_" } @$seq;
 350                 push @{$final_config}, @config;
 351         }
 352    }
 353 }
 354 sub generate_controller_rawconfig {
 355     my ($class, $plugin_config, $config) = @_;
 356
 357     my $nodename = PVE::INotify::nodename();
 358
 359     my $final_config = [];
 360     push @{$final_config}, "log syslog informational";
 361     push @{$final_config}, "ip forwarding";
 362     push @{$final_config}, "ipv6 forwarding";
 363     push @{$final_config}, "frr defaults datacenter";
 364     push @{$final_config}, "service integrated-vtysh-config";
 365     push @{$final_config}, "hostname $nodename";
 366     push @{$final_config}, "!";
 367
 368     if (-e "/etc/frr/frr.conf.local") {
 369         generate_frr_recurse($final_config, $config->{frr}->{vrf}, "vrf", 1);
 370         generate_frr_routemap($final_config, $config->{frr_routemap});
 371         push @{$final_config}, "!";
 372
 373         my $local_conf = file_get_contents("/etc/frr/frr.conf.local");
 374         chomp ($local_conf);
 375         push @{$final_config}, $local_conf;
 376     } else {
 377         generate_frr_recurse($final_config, $config->{frr}, undef, 0);
 378         generate_frr_routemap($final_config, $config->{frr_routemap});
 379     }
 380
 381     push @{$final_config}, "!";
 382     push @{$final_config}, "line vty";
 383     push @{$final_config}, "!";
 384
 385     my $rawconfig = join("\n", @{$final_config});
 386
 387     return if !$rawconfig;
 388     return $rawconfig;
 389 }
 390
 391 sub write_controller_config {
 392     my ($class, $plugin_config, $config) = @_;
 393
 394     my $rawconfig = $class->generate_controller_rawconfig($plugin_config, $config);
 395     return if !$rawconfig;
 396     return if !-d "/etc/frr";
 397
 398     file_set_contents("/etc/frr/frr.conf", $rawconfig);
 399 }
 400
 401 sub reload_controller {
 402     my ($class) = @_;
 403
 404     my $conf_file = "/etc/frr/frr.conf";
 405     my $bin_path = "/usr/lib/frr/frr-reload.py";
 406
 407     if (!-e $bin_path) {
 408         warn "missing $bin_path. Please install frr-pythontools package";
 409         return;
 410     }
 411
 412     my $err = sub {
 413         my $line = shift;
 414         if ($line =~ /ERROR:/) {
 415             warn "$line \n";
 416         }
 417     };
 418
 419     if (-e $conf_file && -e $bin_path) {
 420         run_command([$bin_path, '--stdout', '--reload', $conf_file], outfunc => {}, errfunc => $err);
 421     }
 422 }
 423
 424 1;
 425
 426