On Wed, Jul 8, 2020 at 7:35 PM Michael Eager <ea...@eagercon.com>
wrote:
>
> I'm having a difficult time configuring the IP address of an
> interface in a Fedora 32 in a LXD container.
>
> The configuration for eth0 in /etc/sysconfig/network-scripts/:
> # cat ifcfg-eth0
> TYPE=Ethernet
> PROXY_METHOD=none
> BROWSER_ONLY=no
> BOOTPROTO=none
> DEFROUTE=yes
> IPV4_FAILURE_FATAL=no
> IPV6INIT=no
> IPV6_DEFROUTE=no
> IPV6_FAILURE_FATAL=no
> IPV6_ADDR_GEN_MODE=stable-privacy
> NAME=eth0
> DEVICE=eth0
> ONBOOT=yes
> IPADDR=192.168.20.43
> PREFIX=24
> GATEWAY=192.168.20.1
> IPV6_DISABLED=yes
> DNS1=192.168.20.1
> DNS2=75.75.75.75
> DNS3=8.8.8.8
> HWADDR=00:16:3e:d1:ea:86
>
> When I start the container, eth0 gets two IP addresses. One is the IP
> specified in the ifcfg-eth0 file. The other is a DHCP address. I'm
> assuming that NetworkManager is getting the DHCP address.
>
> I tried adding NMCONTROLLED=no to the ifcfg, but I get the same double
> IP assignment.
>
> I've tried removing the ifcfg-eth0 file and configuring the interface
> using nmcli as described here:
>
> https://linuxconfig.org/how-to-configure-static-ip-address-on-fedora-31
>
> That doesn't work. When the container restarts, a new eth0 is created
> with a different UUID.

I use lxc and not lxd, but I suspect that they are conceptually similar.

An lxc container's ip configuration's set by lxc's "external"
configuration, and not by the container's "internal" configuration.

$ cat /etc/lxc/default.conf
lxc.net.0.flags = up
lxc.net.0.hwaddr = 00:16:3e:xx:xx:xx
lxc.net.0.link = lxcbr0
lxc.net.0.type = veth
lxc.net.0.veth.mode = bridge

$ cat /lxc/alpine/config
...
lxc.net.0.ipv4.address = 192.168.124.241/24
lxc.net.0.ipv4.gateway = 192.168.124.1
lxc.net.0.name = eth0
...
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