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         },
  26         peers => {
  27             description => "peers address list.",
  28             type => 'string', format => 'ip-list'
  29         },
  30     };
  31 }
  32
  33 sub options {
  34     return {
  35         'asn' => { optional => 0 },
  36         'peers' => { optional => 0 },
  37     };
  38 }
  39
  40 # Plugin implementation
  41 sub generate_controller_config {
  42     my ($class, $plugin_config, $controller_cfg, $id, $uplinks, $config) = @_;
  43
  44     my @peers;
  45     @peers = PVE::Tools::split_list($plugin_config->{'peers'}) if $plugin_config->{'peers'};
  46
  47     my $local_node = PVE::INotify::nodename();
  48
  49     my $asn = $plugin_config->{asn};
  50     my $ebgp = undef;
  51     my $loopback = undef;
  52     my $autortas = undef;
  53     my $bgprouter = find_bgp_controller($local_node, $controller_cfg);
  54     if($bgprouter) {
  55         $ebgp = 1 if $plugin_config->{'asn'} ne $bgprouter->{asn};
  56         $loopback = $bgprouter->{loopback} if $bgprouter->{loopback};
  57         $asn = $bgprouter->{asn} if $bgprouter->{asn};
  58         $autortas = $plugin_config->{'asn'} if $ebgp;
  59     }
  60
  61     return if !$asn;
  62
  63     my $bgp = $config->{frr}->{router}->{"bgp $asn"} //= {};
  64
  65     my ($ifaceip, $interface) = PVE::Network::SDN::Zones::Plugin::find_local_ip_interface_peers(\@peers, $loopback);
  66
  67     my $remoteas = $ebgp ? "external" : $asn;
  68
  69     #global options
  70     my @controller_config = (
  71         "bgp router-id $ifaceip",
  72         "no bgp default ipv4-unicast",
  73         "coalesce-time 1000",
  74     );
  75
  76     push(@{$bgp->{""}}, @controller_config) if keys %{$bgp} == 0;
  77
  78     @controller_config = ();
  79
  80     #VTEP neighbors
  81     push @controller_config, "neighbor VTEP peer-group";
  82     push @controller_config, "neighbor VTEP remote-as $remoteas";
  83     push @controller_config, "neighbor VTEP bfd";
  84
  85     if($ebgp && $loopback) {
  86         push @controller_config, "neighbor VTEP ebgp-multihop 10";
  87         push @controller_config, "neighbor VTEP update-source $loopback";
  88     }
  89
  90     # VTEP peers
  91     foreach my $address (@peers) {
  92         next if $address eq $ifaceip;
  93         push @controller_config, "neighbor $address peer-group VTEP";
  94     }
  95
  96     push(@{$bgp->{""}}, @controller_config);
  97
  98     # address-family l2vpn
  99     @controller_config = ();
 100     push @controller_config, "neighbor VTEP activate";
 101     push @controller_config, "advertise-all-vni";
 102     push @controller_config, "autort as $autortas" if $autortas;
 103     push(@{$bgp->{"address-family"}->{"l2vpn evpn"}}, @controller_config);
 104
 105     return $config;
 106 }
 107
 108 sub generate_controller_zone_config {
 109     my ($class, $plugin_config, $controller, $controller_cfg, $id, $uplinks, $config) = @_;
 110
 111     my $local_node = PVE::INotify::nodename();
 112
 113     my $vrf = "vrf_$id";
 114     my $vrfvxlan = $plugin_config->{'vrf-vxlan'};
 115     my $exitnodes = $plugin_config->{'exitnodes'};
 116     my $advertisesubnets = $plugin_config->{'advertise-subnets'};
 117     my $exitnodes_local_routing = $plugin_config->{'exitnodes-local-routing'};
 118
 119     my $asn = $controller->{asn};
 120     my $ebgp = undef;
 121     my $loopback = undef;
 122     my $autortas = undef;
 123     my $bgprouter = find_bgp_controller($local_node, $controller_cfg);
 124     if($bgprouter) {
 125         $ebgp = 1 if $controller->{'asn'} ne $bgprouter->{asn};
 126         $loopback = $bgprouter->{loopback} if $bgprouter->{loopback};
 127         $asn = $bgprouter->{asn} if $bgprouter->{asn};
 128         $autortas = $controller->{'asn'} if $ebgp;
 129     }
 130
 131     return if !$vrf || !$vrfvxlan || !$asn;
 132
 133     # vrf
 134     my @controller_config = ();
 135     push @controller_config, "vni $vrfvxlan";
 136     push(@{$config->{frr}->{vrf}->{"$vrf"}}, @controller_config);
 137
 138     #main vrf router
 139     @controller_config = ();
 140     push @controller_config, "no bgp ebgp-requires-policy" if $ebgp;
 141 #    push @controller_config, "!";
 142     push(@{$config->{frr}->{router}->{"bgp $asn vrf $vrf"}->{""}}, @controller_config);
 143
 144     if ($autortas) {
 145         push(@{$config->{frr}->{router}->{"bgp $asn vrf $vrf"}->{"address-family"}->{"l2vpn evpn"}}, "route-target import $autortas:$vrfvxlan");
 146         push(@{$config->{frr}->{router}->{"bgp $asn vrf $vrf"}->{"address-family"}->{"l2vpn evpn"}}, "route-target export $autortas:$vrfvxlan");
 147     }
 148
 149     my $is_gateway = $exitnodes->{$local_node};
 150
 151     if ($is_gateway) {
 152
 153         if (!$exitnodes_local_routing) {
 154             @controller_config = ();
 155             #import /32 routes of evpn network from vrf1 to default vrf (for packet return)
 156             push @controller_config, "import vrf $vrf";
 157             push(@{$config->{frr}->{router}->{"bgp $asn"}->{"address-family"}->{"ipv4 unicast"}}, @controller_config);
 158             push(@{$config->{frr}->{router}->{"bgp $asn"}->{"address-family"}->{"ipv6 unicast"}}, @controller_config);
 159
 160             @controller_config = ();
 161             #redistribute connected to be able to route to local vms on the gateway
 162             push @controller_config, "redistribute connected";
 163             push(@{$config->{frr}->{router}->{"bgp $asn vrf $vrf"}->{"address-family"}->{"ipv4 unicast"}}, @controller_config);
 164             push(@{$config->{frr}->{router}->{"bgp $asn vrf $vrf"}->{"address-family"}->{"ipv6 unicast"}}, @controller_config);
 165         }
 166
 167         @controller_config = ();
 168         #add default originate to announce 0.0.0.0/0 type5 route in evpn
 169         push @controller_config, "default-originate ipv4";
 170         push @controller_config, "default-originate ipv6";
 171         push(@{$config->{frr}->{router}->{"bgp $asn vrf $vrf"}->{"address-family"}->{"l2vpn evpn"}}, @controller_config);
 172     } elsif ($advertisesubnets) {
 173
 174         @controller_config = ();
 175         #redistribute connected networks
 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 $vrf"}->{"address-family"}->{"ipv6 unicast"}}, @controller_config);
 179
 180         @controller_config = ();
 181         #advertise connected networks type5 route in evpn
 182         push @controller_config, "advertise ipv4 unicast";
 183         push @controller_config, "advertise ipv6 unicast";
 184         push(@{$config->{frr}->{router}->{"bgp $asn vrf $vrf"}->{"address-family"}->{"l2vpn evpn"}}, @controller_config);
 185     }
 186
 187     return $config;
 188 }
 189
 190 sub generate_controller_vnet_config {
 191     my ($class, $plugin_config, $controller, $zone, $zoneid, $vnetid, $config) = @_;
 192
 193     my $exitnodes = $zone->{'exitnodes'};
 194     my $exitnodes_local_routing = $zone->{'exitnodes-local-routing'};
 195
 196     return if !$exitnodes_local_routing;
 197
 198     my $local_node = PVE::INotify::nodename();
 199     my $is_gateway = $exitnodes->{$local_node};
 200
 201     return if !$is_gateway;
 202
 203     my $subnets = PVE::Network::SDN::Vnets::get_subnets($vnetid, 1);
 204     my @controller_config = ();
 205     foreach my $subnetid (sort keys %{$subnets}) {
 206         my $subnet = $subnets->{$subnetid};
 207         my $cidr = $subnet->{cidr};
 208         push @controller_config, "ip route $cidr 10.255.255.2 xvrf_$zoneid";
 209     }
 210     push(@{$config->{frr}->{''}}, @controller_config);
 211 }
 212
 213 sub on_delete_hook {
 214     my ($class, $controllerid, $zone_cfg) = @_;
 215
 216     # verify that zone is associated to this controller
 217     foreach my $id (keys %{$zone_cfg->{ids}}) {
 218         my $zone = $zone_cfg->{ids}->{$id};
 219         die "controller $controllerid is used by $id"
 220             if (defined($zone->{controller}) && $zone->{controller} eq $controllerid);
 221     }
 222 }
 223
 224 sub on_update_hook {
 225     my ($class, $controllerid, $controller_cfg) = @_;
 226
 227     # we can only have 1 evpn controller / 1 asn by server
 228
 229     my $controllernb = 0;
 230     foreach my $id (keys %{$controller_cfg->{ids}}) {
 231         next if $id eq $controllerid;
 232         my $controller = $controller_cfg->{ids}->{$id};
 233         next if $controller->{type} ne "evpn";
 234         $controllernb++;
 235         die "only 1 global evpn controller can be defined" if $controllernb > 1;
 236     }
 237 }
 238
 239 sub find_bgp_controller {
 240     my ($nodename, $controller_cfg) = @_;
 241
 242     my $controller = undef;
 243     foreach my $id  (keys %{$controller_cfg->{ids}}) {
 244         $controller = $controller_cfg->{ids}->{$id};
 245         next if $controller->{type} ne 'bgp';
 246         next if $controller->{node} ne $nodename;
 247         last;
 248     }
 249
 250     return $controller;
 251 }
 252
 253
 254 sub sort_frr_config {
 255     my $order = {};
 256     $order->{''} = 0;
 257     $order->{'vrf'} = 1;
 258     $order->{'ipv4 unicast'} = 1;
 259     $order->{'ipv6 unicast'} = 2;
 260     $order->{'l2vpn evpn'} = 3;
 261
 262     my $a_val = 100;
 263     my $b_val = 100;
 264
 265     $a_val = $order->{$a} if defined($order->{$a});
 266     $b_val = $order->{$b} if defined($order->{$b});
 267
 268     if ($a =~ /bgp (\d+)$/) {
 269         $a_val = 2;
 270     }
 271
 272     if ($b =~ /bgp (\d+)$/) {
 273         $b_val = 2;
 274     }
 275
 276     return $a_val <=> $b_val;
 277 }
 278
 279 sub generate_frr_recurse{
 280    my ($final_config, $content, $parentkey, $level) = @_;
 281
 282    my $keylist = {};
 283    $keylist->{vrf} = 1;
 284    $keylist->{'address-family'} = 1;
 285    $keylist->{router} = 1;
 286
 287    my $exitkeylist = {};
 288    $exitkeylist->{vrf} = 1;
 289    $exitkeylist->{'address-family'} = 1;
 290
 291    # FIXME: make this generic
 292    my $paddinglevel = undef;
 293    if ($level == 1 || $level == 2) {
 294         $paddinglevel = $level - 1;
 295    } elsif ($level == 3 || $level ==  4) {
 296         $paddinglevel = $level - 2;
 297    }
 298
 299    my $padding = "";
 300    $padding = ' ' x ($paddinglevel) if $paddinglevel;
 301
 302    if (ref $content eq  'HASH') {
 303         foreach my $key (sort sort_frr_config keys %$content) {
 304             if ($parentkey && defined($keylist->{$parentkey})) {
 305                 push @{$final_config}, $padding."!";
 306                 push @{$final_config}, $padding."$parentkey $key";
 307             } elsif ($key ne '' && !defined($keylist->{$key})) {
 308                 push @{$final_config}, $padding."$key";
 309             }
 310
 311             my $option = $content->{$key};
 312             generate_frr_recurse($final_config, $option, $key, $level+1);
 313
 314             push @{$final_config}, $padding."exit-$parentkey" if $parentkey && defined($exitkeylist->{$parentkey});
 315         }
 316     }
 317
 318     if (ref $content eq 'ARRAY') {
 319         push @{$final_config}, map { $padding . "$_" } @$content;
 320     }
 321 }
 322
 323 sub generate_controller_rawconfig {
 324     my ($class, $plugin_config, $config) = @_;
 325
 326     my $nodename = PVE::INotify::nodename();
 327
 328     my $final_config = [];
 329     push @{$final_config}, "log syslog informational";
 330     push @{$final_config}, "ip forwarding";
 331     push @{$final_config}, "ipv6 forwarding";
 332     push @{$final_config}, "frr defaults datacenter";
 333     push @{$final_config}, "service integrated-vtysh-config";
 334     push @{$final_config}, "hostname $nodename";
 335     push @{$final_config}, "!";
 336
 337     if (-e "/etc/frr/frr.conf.local") {
 338         generate_frr_recurse($final_config, $config->{frr}->{vrf}, "vrf", 1);
 339         push @{$final_config}, "!";
 340
 341         my $local_conf = file_get_contents("/etc/frr/frr.conf.local");
 342         chomp ($local_conf);
 343         push @{$final_config}, $local_conf;
 344     } else {
 345         generate_frr_recurse($final_config, $config->{frr}, undef, 0);
 346     }
 347
 348     push @{$final_config}, "!";
 349     push @{$final_config}, "line vty";
 350     push @{$final_config}, "!";
 351
 352     my $rawconfig = join("\n", @{$final_config});
 353
 354     return if !$rawconfig;
 355     return $rawconfig;
 356 }
 357
 358 sub write_controller_config {
 359     my ($class, $plugin_config, $config) = @_;
 360
 361     my $rawconfig = $class->generate_controller_rawconfig($plugin_config, $config);
 362     return if !$rawconfig;
 363     return if !-d "/etc/frr";
 364
 365     file_set_contents("/etc/frr/frr.conf", $rawconfig);
 366 }
 367
 368 sub reload_controller {
 369     my ($class) = @_;
 370
 371     my $conf_file = "/etc/frr/frr.conf";
 372     my $bin_path = "/usr/lib/frr/frr-reload.py";
 373
 374     if (!-e $bin_path) {
 375         warn "missing $bin_path. Please install frr-pythontools package";
 376         return;
 377     }
 378
 379     my $err = sub {
 380         my $line = shift;
 381         if ($line =~ /ERROR:/) {
 382             warn "$line \n";
 383         }
 384     };
 385
 386     if (-e $conf_file && -e $bin_path) {
 387         run_command([$bin_path, '--stdout', '--reload', $conf_file], outfunc => {}, errfunc => $err);
 388     }
 389 }
 390
 391 1;
 392
 393