[pve-devel] [PATCH v2 pve-container] POC : add/del/update ip from vnet-subnet-ipam

[Alexandre Derumier]

This is a POC to call ip to retreive ip address from ipam.

(it's really just a poc && buggt , it need to be improve for vnet changes, pending config apply/revert,...)
---
 src/PVE/LXC/Config.pm | 107 +++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 106 insertions(+), 1 deletion(-)

diff --git a/src/PVE/LXC/Config.pm b/src/PVE/LXC/Config.pm
index 5bf12d5..05498e2 100644
--- a/src/PVE/LXC/Config.pm
+++ b/src/PVE/LXC/Config.pm
@@ -11,6 +11,14 @@ use PVE::INotify;
 use PVE::JSONSchema qw(get_standard_option);
 use PVE::Tools;
 
+my $have_sdn;
+eval {
+    require PVE::Network::SDN::Vnets;
+    require PVE::Network::SDN::Subnets;
+    $have_sdn = 1;
+};
+
+
 use base qw(PVE::AbstractConfig);
 
 my $nodename = PVE::INotify::nodename();
@@ -1145,7 +1153,6 @@ sub parse_lxc_network {
 	my $dc = PVE::Cluster::cfs_read_file('datacenter.cfg');
 	$res->{hwaddr} = PVE::Tools::random_ether_addr($dc->{mac_prefix});
     }
-
     return $res;
 }
 
@@ -1225,6 +1232,8 @@ sub vmconfig_hotplug_pending {
 		$cgroup->change_cpu_shares(undef, $confdesc->{cpuunits}->{default});
 	    } elsif ($opt =~ m/^net(\d)$/) {
 		my $netid = $1;
+		my $net = $class->parse_lxc_network($conf->{$opt});
+		delete_net_ip($conf->{hostname}, $net);
 		PVE::Network::veth_delete("veth${vmid}i$netid");
 	    } else {
 		die "skip\n"; # skip non-hotpluggable opts
@@ -1251,6 +1260,7 @@ sub vmconfig_hotplug_pending {
 	    } elsif ($opt =~ m/^net(\d+)$/) {
 		my $netid = $1;
 		my $net = $class->parse_lxc_network($value);
+		update_net_ip($conf->{hostname}, $net);
 		$value = $class->print_lxc_network($net);
 		PVE::LXC::update_net($vmid, $conf, $opt, $net, $netid, $rootdir);
 	    } elsif ($opt eq 'memory' || $opt eq 'swap') {
@@ -1327,6 +1337,8 @@ sub vmconfig_apply_pending {
 	    } elsif ($opt =~ m/^net(\d+)$/) {
 		my $netid = $1;
 		my $net = $class->parse_lxc_network($conf->{pending}->{$opt});
+		my $oldnet = $class->parse_lxc_network($conf->{$opt});
+		update_net_ip($conf->{hostname}, $net, $oldnet);
 		$conf->{pending}->{$opt} = $class->print_lxc_network($net);
 	    }
 	};
@@ -1590,4 +1602,97 @@ sub get_backup_volumes {
     return $return_volumes;
 }
 
+sub update_net_ip {
+    my ($hostname, $net, $oldnet) = @_;
+
+    return if !$have_sdn;
+
+    my $oldbridge = $oldnet->{bridge};
+    my $bridge = $net->{bridge};
+
+    my $subnets = PVE::Network::SDN::Vnets::get_subnets($bridge);
+
+    return if !keys %{$subnets};
+
+    eval {
+	if (!$net->{ip}) {
+	    $net->{ip} = PVE::Network::SDN::Vnets::get_next_free_ip($bridge, $hostname);
+	    #writeconfig ?
+	} elsif ($net->{ip} ne 'dhcp' && $net->{ip} ne 'manual') {
+	    PVE::Network::SDN::Vnets::add_ip($bridge, $net->{ip}, $hostname) if $net->{ip} ne $oldnet->{ip};
+	    #writeconfig ?
+	}
+    };
+    if ($@) {
+	#keep old config if error
+	$net->{ip} = $oldnet->{ip};
+	die $@;
+    }
+
+    #delete old ip after adding new
+    if ($oldnet->{ip} && $oldnet->{ip} ne 'dhcp' && $oldnet->{ip} ne 'manual') {
+	my $deletebridge = $oldbridge ne $bridge ? $oldbridge : $bridge;
+	eval {
+	    PVE::Network::SDN::Vnets::del_ip($deletebridge, $oldnet->{ip}, $hostname) if !$net->{ip} || $net->{ip} ne $oldnet->{ip};
+	    #writeconfig ?
+	};
+	warn $@ if $@;
+    }
+
+
+    eval {
+	if (!$net->{ip6}) {
+	    $net->{ip6} = PVE::Network::SDN::Vnets::get_next_free_ip($bridge, $hostname, 6);
+	    #writeconfig ?
+	} elsif ($net->{ip6} ne 'dhcp' && $net->{ip6} ne 'manual' && $net->{ip6} ne 'auto') {
+	    PVE::Network::SDN::Vnets::add_ip($bridge, $net->{ip6}, $hostname) if $net->{ip6} ne $oldnet->{ip6};
+	    #writeconfig ?
+	}
+    };
+    if ($@) {
+	#keep old config if error
+	$net->{ip6} = $oldnet->{ip6};
+	die $@;
+    }
+
+    #delete old ip after adding new
+    if ($oldnet->{ip6} && $oldnet->{ip6} ne 'dhcp' && $oldnet->{ip6} ne 'manual' && $net->{ip6} ne 'auto') {
+	my $deletebridge = $oldbridge ne $bridge ? $oldbridge : $bridge;
+	eval {
+	    PVE::Network::SDN::Vnets::del_ip($deletebridge, $oldnet->{ip6}, $hostname) if !$net->{ip6} || $net->{ip6} ne $oldnet->{ip6};
+	    #writeconfig ?
+	};
+	warn $@ if $@;
+    }
+
+    if ($net->{ip}) {
+	my ($ip, undef) = split(/\//, $net->{ip});
+	my ($subnetidv4, $subnetv4) = PVE::Network::SDN::Subnets::find_ip_subnet($ip, $subnets);
+	$net->{gw} = $subnetv4->{gateway};
+    }
+
+    if ($net->{ip6}) {
+	my ($ip6, undef) = split(/\//, $net->{ip6});
+	my ($subnetidv6, $subnetv6) = PVE::Network::SDN::Subnets::find_ip_subnet($ip6, $subnets);
+	$net->{gw6} = $subnetv6->{gateway} if !$net->{gw6};
+    }
+
+}
+
+sub delete_net_ip {
+    my ($hostname, $net) = @_;
+
+    return if !$have_sdn;
+
+    my $bridge = $net->{bridge};
+    my $subnets = PVE::Network::SDN::Vnets::get_subnets($bridge);
+    return if !keys %{$subnets};
+
+    if ($net->{ip6} && ($net->{ip6} eq 'auto' || $net->{ip6} eq 'manual' || $net->{ip6} eq 'dhcp')) {
+	PVE::Network::SDN::Vnets::del_ip($hostname, $bridge, $net->{ip6});
+    } elsif ($net->{ip} && $net->{ip} ne 'dhcp' && $net->{ip} ne 'manual') {
+	PVE::Network::SDN::Vnets::del_ip($hostname, $bridge, $net->{ip});
+    }
+}
+
 1;
-- 
2.20.1