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