seem that qemu 2.8 support a new option for virtio-net : host_mtu=xxx
That would be awesome if Proxmox could implement that. The actual use case is Hetzners new vSwitch-Feature where the mtu needs to be 1400. So I am for sure not the only one wanting this feature..
--- /usr/share/perl5/PVE/QemuServer.pm.orig 2018-08-30 03:07:40.885517605 +0300
+++ /usr/share/perl5/PVE/QemuServer.pm 2018-08-30 02:56:40.191065007 +0300
@@ -715,6 +715,12 @@
description => "Rate limit in mbps (megabytes per second) as floating point number.",
optional => 1,
},
+ mtu => {
+ type => 'number',
+ minimum => 1200, maximum=> 9000,
+ description => "MTU",
+ optional => 1,
+ },
tag => {
type => 'integer',
minimum => 1, maximum => 4094,
@@ -1839,6 +1845,7 @@
$tmpstr .= ",vectors=$vectors,mq=on";
}
$tmpstr .= ",bootindex=$net->{bootindex}" if $net->{bootindex} ;
+ $tmpstr .= ",host_mtu=$net->{mtu}" if $net->{mtu} ;
if ($use_old_bios_files) {
my $romfile;
@@ -4634,7 +4641,7 @@
&$safe_string_ne($oldnet->{trunks}, $newnet->{trunks}) ||
&$safe_num_ne($oldnet->{firewall}, $newnet->{firewall})) {
PVE::Network::tap_unplug($iface);
- PVE::Network::tap_plug($iface, $newnet->{bridge}, $newnet->{tag}, $newnet->{firewall}, $newnet->{trunks}, $newnet->{rate});
+ PVE::Network::tap_plug($iface, $newnet->{bridge}, $newnet->{tag}, $newnet->{firewall}, $newnet->{trunks}, $newnet->{rate}, $newnet->{mtu});
} elsif (&$safe_num_ne($oldnet->{rate}, $newnet->{rate})) {
# Rate can be applied on its own but any change above needs to
# include the rate in tap_plug since OVS resets everything.--- /usr/share/pve-manager/js/pvemanagerlib.js.orig 2018-08-30 03:08:07.430582086 +0300
+++ /usr/share/pve-manager/js/pvemanagerlib.js 2018-08-30 02:37:28.504841119 +0300
@@ -1517,6 +1517,8 @@
res.bridge = match_res[1];
} else if ((match_res = p.match(/^rate=(\d+(\.\d+)?)$/)) !== null) {
res.rate = match_res[1];
+ } else if ((match_res = p.match(/^mtu=(\d+)$/)) !== null) {
+ res.mtu = match_res[1];
} else if ((match_res = p.match(/^tag=(\d+(\.\d+)?)$/)) !== null) {
res.tag = match_res[1];
} else if ((match_res = p.match(/^firewall=(\d+)$/)) !== null) {
@@ -1558,6 +1560,9 @@
if (net.rate) {
netstr += ",rate=" + net.rate;
}
+ if (net.mtu) {
+ netstr += ",mtu=" + net.mtu;
+ }
if (net.queues) {
netstr += ",queues=" + net.queues;
}
@@ -1785,7 +1790,7 @@
if (!p || p.match(/^\s*$/)) {
return; // continue
}
- var match_res = p.match(/^(bridge|hwaddr|mtu|name|ip|ip6|gw|gw6|firewall|tag|rate)=(\S+)$/);
+ var match_res = p.match(/^(bridge|hwaddr|mtu|name|ip|ip6|gw|gw6|firewall|tag|mtu|rate)=(\S+)$/);
if (!match_res) {
// todo: simply ignore errors ?
return; // continue
@@ -18401,6 +18406,12 @@
delete me.network.rate;
}
+ if (values.mtu) {
+ me.network.mtu = values.mtu;
+ } else {
+ delete me.network.mtu;
+ }
+
var params = {};
params[me.confid] = PVE.Parser.printQemuNetwork(me.network);
@@ -18466,6 +18477,16 @@
xtype: 'proxmoxcheckbox',
fieldLabel: gettext('Disconnect'),
name: 'disconnect'
+ },
+ {
+ xtype: 'numberfield',
+ fieldLabel: gettext('MTU'),
+ minValue: 1200,
+ maxValue: 9000,
+ value: '',
+ emptyText: '1500',
+ name: 'mtu',
+ allowBlank: true
}
];
@@ -18484,6 +18505,7 @@
'firewall',
'model',
'macaddr',
+ 'mtu',
'rate',
'queues'
];