[Lxc-users] eth0 not coming online in LXC environment

[David Parks]

I've got an environment set up now where the host OS has a static IP
directly connected to the LAN. I'm bridging the containers to have their own
static LAN IP as well.

 

In my containers I've set:

 

lxc.network.type=veth

lxc.network.link=br0

lxc.network.name=eth0

lxc.network.ipv4 = 10.1.3.21/16

lxc.network.flags=up

 

When I start my container eth0 is *not* configured. If I manually add
`eth0=eth0` in /run/network/ifstate and `service restart networking`, it
gets configured properly.

 

davidparks21 at Myrrix:~$ dmesg | grep eth0

[    3.185536] igb 0000:01:00.0: >eth0: (PCIe:2.5Gb/s:Width x4)
00:a0:d1:ec:a5:60

[    3.185617] igb 0000:01:00.0: >eth0: PBA No: 82576B-001

[    7.763432] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready

[19343.087473] device veth0BuAGV entered promiscuous mode

[19343.089738] IPv6: ADDRCONF(NETDEV_UP): veth0BuAGV: link is not ready

[19343.378396] IPv6: ADDRCONF(NETDEV_CHANGE): veth0BuAGV: link becomes ready

[19343.378439] br0: port 4(veth0BuAGV) entered forwarding state

[19343.378444] br0: port 4(veth0BuAGV) entered forwarding state

[19361.054176] br0: port 4(veth0BuAGV) entered disabled state

[19361.062203] device veth0BuAGV left promiscuous mode

[19361.062207] br0: port 4(veth0BuAGV) entered disabled state

 

davidparks21 at Myrrix:~$ dmesg | grep em1

[   10.869348] device em1 entered promiscuous mode

[   10.985440] IPv6: ADDRCONF(NETDEV_UP): em1: link is not ready

[   13.985304] igb: em1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control:
RX

[   13.987591] IPv6: ADDRCONF(NETDEV_CHANGE): em1: link becomes ready

[   13.987626] br0: port 1(em1) entered forwarding state

[   13.987632] br0: port 1(em1) entered forwarding state

 

After looking at dmesg output I noticed that there are (unexpected)
references to em1, which is the host's physical NIC.

 

The bridging all works, networking is fine, it's just when I start the
container, rebooting reproduces the problem, then manually updating ifstate
and rebooting resolves it.

 

I'm not sure how to configure it so it configure eth0 on reboot as I would
expect.

 

Thanks for any advice!

David

 

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