[PATCH installer 08/15] install: network: set up management bond if requested

[Christoph Heiss <c.heiss@proxmox.com>]

Adds the necessary configuration to /etc/network/interfaces when bonding
is enabled in the installation config.

A bond named 'bond0' will be created, with the default bridge (as
before) 'vmbr0' on top of that.

Signed-off-by: Christoph Heiss <c.heiss@proxmox.com>
---
 Proxmox/Install.pm | 43 ++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 40 insertions(+), 3 deletions(-)

diff --git a/Proxmox/Install.pm b/Proxmox/Install.pm
index 04264a9..9c2b244 100644
--- a/Proxmox/Install.pm
+++ b/Proxmox/Install.pm
@@ -829,8 +829,39 @@ my sub setup_ifupdown2_config {
             && ($_->{protocol} // '') eq 'ra';
     } $gateways6->@*;
 
+    my $bond_opts = Proxmox::Install::Config::get_mngmt_bond_opt();
+    my $bond_enabled = Proxmox::Install::Config::get_mngmt_bond_enabled();
+    if ($bond_enabled) {
+        # When setting up bridged networking, the bond is attached to the main bridge as port.
+        # Otherwise, the bond represents the main management interface, i.e. with the address
+        # configured directly on it.
+
+        $ethdev = 'bond0';
+        my $addr_method = $iso_env->{cfg}->{bridged_network} ? 'manual' : 'static';
+
+        # translate all bond members MACs to their final interface name, either pinned or not
+        my @members;
+        for my $mac ($bond_opts->{members}->@*) {
+            $mac = lc($mac); # normalize into lowercase
+
+            if (defined($netif_pin_map) && defined($netif_pin_map->{$mac})) {
+                push @members, $netif_pin_map->{$mac};
+            } else {
+                my ($if) = grep { $_->{mac} eq $mac } values %$interfaces;
+                push @members, $if->{name};
+            }
+        }
+
+        $ifaces .=
+            "auto $ethdev\niface $ethdev inet $addr_method\n"
+            . "\tbond-ports "
+            . join(' ', @members) . "\n"
+            . "\tbond-mode $bond_opts->{mode}\n"
+            . "\tbond-miimon 100\n";
+    }
+
     if ($iso_env->{cfg}->{bridged_network}) {
-        $ifaces .= "iface $ethdev $ntype manual\n";
+        $ifaces .= "\niface $ethdev $ntype manual\n" if !$bond_enabled;
 
         $ifaces .=
             "\nauto vmbr0\niface vmbr0 $ntype static\n"
@@ -839,11 +870,17 @@ my sub setup_ifupdown2_config {
             . "\tbridge-ports $ethdev\n"
             . "\tbridge-stp off\n"
             . "\tbridge-fd 0\n";
-    } else {
-        $ifaces .= "auto $ethdev\n" . #
+    } elsif (!$bond_enabled) {
+        $ifaces .= "\nauto $ethdev\n" . #
             "iface $ethdev $ntype static\n" . #
             "\taddress $cidr\n";
 
+        if (!$is_gateway6_from_ra) {
+            $ifaces .= "\tgateway $gateway\n";
+        }
+    } else {
+        $ifaces .= "\taddress $cidr\n";
+
         if (!$is_gateway6_from_ra) {
             $ifaces .= "\tgateway $gateway\n";
         }
-- 
2.55.0