Adding ethernet interface to openVZ container

Adding ethernet interface (eth0, eth1, etc.) to container

To add ethernet interface to container use command:

vzctl set <CID> --netif_add <ifname> --save

where <ifname> can be eth0, eth1 etc.

When the interface is added to container a corresponding interface with name such as veth<CID>.<n> where n is 0 for eth0, 1 for eth1, etc. is automatically added in base host. In base host this veth* interface should then be added to a bridge so that packets sent to eth0, eth1 etc. in container can be forwarded via veth*.0 or veth*.1 through bridges to desired destinations.

When interfaces are added in this manner, the corresponding interface configuration file should be created and network service should be enabled on start-up. To enable network service on start-up use:

service network start

To configure static IPs for container using interface, say eth0, use following configuration as '/etc/sysconfig/network-scripts/ifcfg-eth0'

DEVICE=eth0
BOOTPROTO=static
ONBOOT=yes
IPADDR=<IP address>
NETMASK=<Netmask>
GATEWAY=<Default Gateway>
DNS1=<Local recursive DNS IP>
NM_CONTROLLED=no