change IP address range

As described in previous posts, we have some servers in lxc network now.

I would like that servers shall have static IP addresses. Say, in the range from 10.0.3.2 until 10.0.3.99.

And client shall have dynamically assigned address, which should not conflict with server’s ones. Let’s limit range of IP addresses, which DHCP Server, dnsmasq assigns for.

You can configure IP address range by modifying lxc file under /etc/default directory.

$ diff lxc lxc.org
27,28c27,28
< LXC_DHCP_RANGE="10.0.3.100,10.0.3.199"
< LXC_DHCP_MAX="100"
---
> LXC_DHCP_RANGE="10.0.3.2,10.0.3.254"
> LXC_DHCP_MAX="253"

After restart, you will see that dnsmasq will set IP address range as follows:

dnsmasq -u lxc-dnsmasq --strict-order --bind-interfaces --pid-file=/var/run/lxc/dnsmasq.pid --conf-file= --listen-address 10.0.3.1 --dhcp-range 10.0.3.100,10.0.3.199 --dhcp-lease-max=100 --dhcp-no-override --except-interface=lo --interface=lxcbr0 --dhcp-leasefile=/var/lib/misc/dnsmasq.lxcbr0.leases --dhcp-authoritative