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