How to create LXC container using lxcbr0 and virbr0 in CentOS/RHEL

Question: How to create an lxc container using lxcbr0 and virbr0 network interfaces?

LXC uses the virtualization management service to support network bridging for containers, libvirtd uses bridge network virbr0 and lxc-net.service uses bridge of lxcbr0. To start virbr0 bridge start libvirt service and create a container using network.link as virbr0:

virbr0: flags=4163 mtu 1500
inet 192.168.122.x netmask 255.255.255.0 broadcast 192.168.1xx.2xx
ether 52:54:00:be:71:21 txqueuelen 0 (Ethernet)

lxcbr0: flags=4163 mtu 1500
inet 10.220.239.1 netmask 255.255.255.0 broadcast 0.0.0.0
inet6 fe80::fc37:c0ff:fe01:78d7 prefixlen 64 scopeid 0x20

# cat /container/ol6ctr4/config
# Template used to create this container: /usr/share/lxc/templates/lxc-oracle
# Parameters passed to the template:
# For additional config options, please look at lxc.container.conf(5)
lxc.network.type = veth
lxc.network.link = virbr0

Container:

# ip addr
11: eth0@if12:  mtu 1500 qdisc pfifo_fast state UP qlen 1000
inet 192.168.122.xx/24 brd 192.168.122.255 scope global dynamic eth0

To start the lxcbr0 bridge, start the lxc-net service and create a container using network.link as lxcbr0. The following then verifies that the container got the IP address assigned from the lxcbr0 address range.

# cat /container/ol5ctr1/config
# Template used to create this container: /usr/share/lxc/templates/lxc-oracle
# Parameters passed to the template: --release=5.latest -a x86_64 --baseurl=http://yum.oracle.com/repo/OracleLinux/OL5/latest/x86_64
# For additional config options, please look at lxc.container.conf(5)
lxc.network.type = veth
lxc.network.link = lxcbr0
lxc.network.flags = up
lxc.network.hwaddr = 00:16:3e:52:59:7d
lxc.rootfs = /container/ol5ctr1/rootfs
# Common configuration
lxc.include = /usr/share/lxc/config/oracle.common.conf
# Container configuration for Oracle Linux 5.latest
lxc.arch = x86_64
lxc.utsname = ol5ctr1
lxc.cap.drop = sys_resource
lxc.cap.drop = setfcap setpcap
lxc.autodev = 0
# Networking

lxc.network.name = eth0
lxc.network.mtu = 1500

# ifconfig lxcbr0
lxcbr0: flags=4163 mtu 1500
inet 10.112.62.XX netmask 255.255.255.0 broadcast 0.0.0.0

Container:

# ifconfig
eth0 Link encap:Ethernet HWaddr 00:16:3E:52:59:7D
inet addr:10.112.62.xx Bcast:10.112.62.xxx Mask:255.255.255.0

You May Also Like