I am struggling with assigning a failover IP address to my Linux Container (LXC). I think the problem lies in the configuration of the container, as apparently setting ipv4 and gateway in the LXC configuration file is not enough. Pinging anything from inside the container returns 100% packet loss.
Here is what I did:
apt-get install -y lxc bridge-utils
change /etc/network/interfaces - replace “eth0” with “br0” and add “bridge_ports eth0”
auto br0
iface br0 inet static
bridge_ports eth0
address 91.229.20.xx ← main IP of server
netmask 255.255.255.0
network 91.229.20.0
broadcast 91.229.20.255
gateway 91.229.20.1
dns-nameservers 4.2.2.1
reboot
lxc-create -t download -n vps1 – --dist ubuntu --release xenial --arch amd64
adjust /var/lib/lxc/vps1/config
lxc.network.type = veth
lxc.network.link = br0 ← changed from lxcbr0 default bridge
lxc.network.flags = up
lxc.network.hwaddr = 52:54:00:00:XX:XX ← supplied by provider
lxc.network.ipv4 = 91.236.255.xx/24 ← this is the failover IP
lxc.network.ipv4.gateway = 91.229.20.1
lxc-start -n vps1
lxc-attach -n vps1
No network connection inside the container. Ping is impossible.
I tried to adjust /etc/network/interfaces in the container from DHCP to
auto eth0
iface eth0 inet static
address 91.236.255.xx ← failover IP
netmask 255.255.255.0
network 91.229.20.0
broadcast 91.229.20.255
(I also tried to add gateway 91.229.20.1, or only the address without netmask/network/broadcast)
The failover IP works on the host when I configure it like this:
auto eth0:1
iface eth0:1 inet static
address 91.236.255.xx ← failover IP
netmask 255.255.255.0
network 91.229.20.0
broadcast 91.229.20.255
What am I doing wrong? I would greatly appreciate some help, as I am out of ideas.