LXC container networking not working
On a Debian server, I installed lxc, but when I create a container, it is missing IP address. When I did “lxc-attack VM_NAME”, and checked the network interface with “ip link” command, i can only see the loopback interface “lo”.
On Host machine, when I checked network interfaces, lxcbr0 was missing. To fix this, edit file
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vi /etc/default/lxc |
Find
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USE_LXC_BRIDGE="false" |
Replace with
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USE_LXC_BRIDGE="true" |
Now restart lxc-net service
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systemctl restart lxc-net |
At this point, you will see the network interface “lxcbr0”.
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root@b24:~# brctl show bridge name bridge id STP enabled interfaces br-52702762660a 8000.024201845e4b no docker0 8000.0242ee9122d8 no lxcbr0 8000.00163e000000 no vethDED0EK lxdbr0 8000.00163e7d81a2 no root@b24:~# |
Next edit file
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vi /etc/lxc/default.conf |
I had the following content in this file
root@b24:/etc/lxc# cat default.conf
lxc.net.0.type = empty
lxc.apparmor.profile = generated
lxc.apparmor.allow_nesting = 1
root@b24:/etc/lxc#
Find
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lxc.net.0.type = empty |
Replace with
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lxc.net.0.type = veth lxc.net.0.link = lxcbr0 lxc.net.0.flags = up |
After this is done, newly created LXC containers get IP addresses.
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root@b24:~# lxc-ls -f NAME STATE AUTOSTART GROUPS IPV4 IPV6 UNPRIVILEGED vm-1 RUNNING 0 - 10.0.3.128 - false root@b24:~# |
See LXC