I'm trying to set up DHCP for my lxcontainers without using lxc-net. The reason for this decision is that I'd like to place my containers in different networks, such that they are unable to talk to each other by default. I have successfully created and run containers using static IPs assigned within the containers' config file before, but I'd like to use a DHCP server on the host this time.

I've installed dnsmasq on my host and configured it like this:

# /etc/dnsmasq.d/dnsmasq.lxcbr.conf domain=local.lxc,10.10.10.0/24 interface=lxcbr dhcp-range=lxcbr,10.10.10.1,10.10.10.200,24h dhcp-option=option:router,10.10.10.254 

According to this the file is being loaded correctly:

root@host:~# service dnsmasq status ● dnsmasq.service - dnsmasq - A lightweight DHCP and caching DNS server Loaded: loaded (/lib/systemd/system/dnsmasq.service; enabled) [...] Feb 03 19:06:39 host dnsmasq[4228]: dnsmasq: syntax check OK. Feb 03 19:06:39 host dnsmasq[4237]: started, version 2.72 cachesize 150 Feb 03 19:06:39 host dnsmasq[4237]: compile time options: IPv6 GNU-getopt DBus i18n IDN DHCP DHCPv6 no-Lua TFTP conntrack ipset auth DNSSEC loop-detect Feb 03 19:06:39 host dnsmasq-dhcp[4237]: DHCP, IP range 10.10.10.1 -- 10.10.10.200, lease time 1d Feb 03 19:06:39 host dnsmasq[4237]: reading /etc/resolv.conf Feb 03 19:06:39 host dnsmasq[4237]: using nameserver upstream.nameserver.ip.here#53 Feb 03 19:06:39 host dnsmasq[4237]: using nameserver upstream.nameserver.ip.here#53 Feb 03 19:06:39 host dnsmasq[4237]: read /etc/hosts - 5 addresses 

lxcbr is the host's interface in the container's network:

root@v22015101445428744:~# ifconfig [...] lxcbrBind Link encap:Ethernet HWaddr fe:60:7a:cc:56:64 inet addr:10.10.10.254 Bcast:10.10.10.255 Mask:255.255.255.0 inet6 addr: fe80::7a:56ff:fe82:921f/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:92 errors:0 dropped:0 overruns:0 frame:0 TX packets:12 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:5688 (5.5 KiB) TX bytes:928 (928.0 B) veth0 Link encap:Ethernet HWaddr fe:60:7a:cc:56:64 inet6 addr: fe80::fc60:7aff:fecc:5664/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:8 errors:0 dropped:0 overruns:0 frame:0 TX packets:8 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:648 (648.0 B) TX bytes:648 (648.0 B) 

veth0 is the container's veth interface:

# /var/lib/lxc/container lxc.network.type = veth lxc.network.name = veth0 lxc.network.flags = up lxc.network.link = lxcbr lxc.network.veth.pair = veth0 

I assume I'm doing something very stupid but I've run out of ideas at this point.

I appreciate your help, Christopher