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Virtuozzo 7 networking config
elwebmaster
Member
I am having some issues with OpenVZ 7 networking config, not sure if anybody here is using it or has experience with its advanced networking features.
On my host node I have these interfaces:
enp5s0 - no ip
eth0 - static public ip
host-routed - no ip
venet0 - no ip
veth42d5092e - no ip
virbr0 : inet 10.37.130.2 netmask 255.255.255.0 broadcast 10.37.130.255
virbr0-nic - no ip
# brctl show
bridge name bridge id STP enabled interfaces
host-routed 8000.000000000000 no
virbr0 8000.525400b32271 no virbr0-nic
The only interface I configured is eth0, all other interfaces were created automatically by Virtuozzo. I created a VM like this:
# prlctl create MyCT --vmtype ct --ostemplate centos-7-x86_64
# prlctl set MyCT --netif_add eth0
# prlctl set MyCT --ifname eth0 --dhcp yes --network Bridged
Needless to say MyCT doesn't get an IP. I want to use Dnsmasq to manage IP assignments to containers. My questions:
1) Which interface should I make Dnsmasq listen on? (I am confused by all these interfaces created by Virtuozzo)
2) What private IP range should I assign IPs from? (not sure if I need to stick to the 10.37.130.0 already chosen by Virtuozzo)
All containers will have have private IPs and I will do NAT. Thanks.
Comments
Got it figured out, will post solution in case anybody else is interested. The main difference between OpenVZ6 and OpenVZ7/Virtuozzo in terms of bridged networking appears to be the automatic addition of the container's interface to the bridge. To achieve NAT-based bridged networking in OpenVZ7:
1) Set static private IP for br0 in /etc/sysconfig/network-scripts/ifcfg-br0
2) Bind Dnsmasq to the static IP assigned to br0
3) Give Dnsmasq a private IP range as the IP assigned to br0
4) Use
prlctl set MyCT --ifname eth0 --dhcp yes --network BridgedFor this setup the virbr0 and virbr0-nic interfaces are not of interest as they belong to the Host-Only bridge which doesn't support forwarding.