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[simpleplugin.pm, evpnplugin.pm] Subject: [pve-devel] [PATCH v8 pve-network 19/25] zones: evpn|simple: add snat iptables rules X-BeenThere: pve-devel@lists.proxmox.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: Proxmox VE development discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 24 Sep 2020 08:42:03 -0000 (use snat instead masquerade for performance) Signed-off-by: Alexandre Derumier --- PVE/Network/SDN/Zones/EvpnPlugin.pm | 18 ++++++++++++++++++ PVE/Network/SDN/Zones/SimplePlugin.pm | 12 ++++++++++++ 2 files changed, 30 insertions(+) diff --git a/PVE/Network/SDN/Zones/EvpnPlugin.pm b/PVE/Network/SDN/Zones/EvpnPlugin.pm index ff25f12..b89f4b1 100644 --- a/PVE/Network/SDN/Zones/EvpnPlugin.pm +++ b/PVE/Network/SDN/Zones/EvpnPlugin.pm @@ -51,6 +51,7 @@ sub generate_sdn_config { my $vrf_iface = "vrf_$zoneid"; my $vrfvxlan = $plugin_config->{'vrf-vxlan'}; + my $local_node = PVE::INotify::nodename(); die "missing vxlan tag" if !$tag; warn "vlan-aware vnet can't be enabled with evpn plugin" if $vnet->{vlanaware}; @@ -86,6 +87,23 @@ sub generate_sdn_config { push @iface_config, "address $gateway" if !defined($address->{$gateway}); $address->{$gateway} = 1; } + if ($subnet->{snat}) { + my $gatewaynodes = $controller->{'gateway-nodes'}; + my $is_evpn_gateway = ""; + foreach my $evpn_gatewaynode (PVE::Tools::split_list($gatewaynodes)) { + $is_evpn_gateway = 1 if $evpn_gatewaynode eq $local_node; + } + #find outgoing interface + my ($outip, $outiface) = PVE::Network::SDN::Zones::Plugin::get_local_route_ip('8.8.8.8'); + if ($outip && $outiface && $is_evpn_gateway) { + #use snat, faster than masquerade + push @iface_config, "post-up iptables -t nat -A POSTROUTING -s '$cidr' -o $outiface -j SNAT --to-source $outip"; + push @iface_config, "post-down iptables -t nat -D POSTROUTING -s '$cidr' -o $outiface -j SNAT --to-source $outip"; + #add conntrack zone once on outgoing interface + push @iface_config, "post-up iptables -t raw -I PREROUTING -i fwbr+ -j CT --zone 1"; + push @iface_config, "post-down iptables -t raw -D PREROUTING -i fwbr+ -j CT --zone 1"; + } + } } push @iface_config, "hwaddress $mac" if $mac; diff --git a/PVE/Network/SDN/Zones/SimplePlugin.pm b/PVE/Network/SDN/Zones/SimplePlugin.pm index a4299dd..c58ae87 100644 --- a/PVE/Network/SDN/Zones/SimplePlugin.pm +++ b/PVE/Network/SDN/Zones/SimplePlugin.pm @@ -48,6 +48,18 @@ sub generate_sdn_config { #add route for /32 pointtopoint my ($ip, $mask) = split(/\//, $cidr); push @iface_config, "up ip route add $cidr dev $vnetid" if $mask == 32; + if ($subnet->{snat}) { + #find outgoing interface + my ($outip, $outiface) = PVE::Network::SDN::Zones::Plugin::get_local_route_ip('8.8.8.8'); + if ($outip && $outiface) { + #use snat, faster than masquerade + push @iface_config, "post-up iptables -t nat -A POSTROUTING -s '$cidr' -o $outiface -j SNAT --to-source $outip"; + push @iface_config, "post-down iptables -t nat -D POSTROUTING -s '$cidr' -o $outiface -j SNAT --to-source $outip"; + #add conntrack zone once on outgoing interface + push @iface_config, "post-up iptables -t raw -I PREROUTING -i fwbr+ -j CT --zone 1"; + push @iface_config, "post-down iptables -t raw -D PREROUTING -i fwbr+ -j CT --zone 1"; + } + } } push @iface_config, "hwaddress $mac" if $mac; -- 2.20.1