[pve-devel] proxmox 2018 : add support for "virtual" network and network plugins ?

[Alexandre DERUMIER]

>>We currently store network settings in /etc/network/interfaces and use ifupdown 
>>to 
>>manage everything. But ifupdown is badly maintained and there is no more 
>>developement 
>>on that package, so we want to move away from that. 


note that cumulus linux have rewrite ifupdown in python (ifupdown2 package) 
https://packages.debian.org/stretch/ifupdown2 

(better ipv6 handing, and graph dependencies between interfaces-bridge-....) 
but it's limited to linux bridge, no ovs. and I don't known if it's easily extendible 


>>My original plan was to use systemd networkd: 
>> 
>>https://www.freedesktop.org/software/systemd/man/systemd-networkd.service.html 

>>What do you think about that? 

I don't known too much how systemd networkd is work. is it easily extendible ? 

What I mean in mind, in a perl management plugin, to manage more complex network sdn, with virtual networks config shared across nodes. 
something like openstack neutron 
plugins should management tap_plug/unplug or vhost_user plug/unplug, firewall rules (iptables or other implement if sdn support it), routing (quagga/frr) like vxlan + evpn-bgp, dhcp/ip management, ... 

A lot of thing can be improved, I'm not sure in can handle by ifupdown,systemd-networkd,... which are more about local network setup configuration. 




(I'm asking about this, because currently, we are running a big flat layer2 network with vlan, and with 4000vms, it's begin to do a lot of broadcast and macs address on switchs, 
so we are planing to do a full layer3 network with network overlay (maybe vxlan+ evpn bgp, maybe opencontrail, maybe something else), and cross datacenter interconnect).