Re: [libvirt] DHCP and secure containers

On 09/02/2014 06:37 AM, Gene Czarcinski wrote: > OK, hopefully this mailing list is more active and I can get some > response to my questions. > --------------------------------------------------------------------------------------------------------------------- > > I have been "playing with" Secure Containers running a lighttpd > server and have it up and running. I used Adam's process > (https://www.happyassassin.net/2014/07/23/bridged-networking-for-libvirt-w...) > for getting a bridge defined when also running NetworkManager. I then > created a virtual network definition: >> <network> >> <name>net18</name> >> <uuid>8d19a05b-ac85-4e2a-88bc-5ca4cbb29a33</uuid> >> <forward mode='bridge'/> >> <bridge name='br0'/> >> </network> > This works fine when I use static addresses such as: >> -N >> source=net18,address=192.168.18.94/24,route=192.168.18.255%192.168.18.1 > but does not work when I specify using dhcp: >> -N source=net18,dhcp > I have reported this as a bug: > https://bugzilla.redhat.com/show_bug.cgi?id=1133686 > > Since there has not been much of a reaction to the BZ report, I > decided to take a look at the source code (it sure would have been > nice if the SRPMS were there in the F20 fedora-virt-preview but I get > the package from development/21). > > I see that libvirt-sandbox-init-common.c has the code for starting > dhcp and also has main() along with some runtime options for -v > verbose and -d debug. > > OK, how do I go about turning verbose and/or debug on? > > Any suggestions on how to debug and get dhcp to work? I not only > want to find the problem but to fix the problem if needed. While I have not figured out how to get dhcp to work with a secure container create by virt-sandbox-service, I have gotten a container working with the network up and a dhcp assigned IP using the lxc-* commands and following this procedure: https://sysadmincasts.com/episodes/24-introduction-to-containers-on-linux... to create a "busybox" container. The network came up automatically. Following the procedure in this tutorial: https://major.io/2014/04/21/launch-secure-lxc-containers-on-fedora-20-usi... I created and installed a test container. I had to add ifcfg-eth0 for a simple network and then run "service network start" for the netowrk to actually come up ... which it did with a DHCP (actually dnsmasq) assigned IP address. Note that this procedure explicitly installs the dhclient package. So, what am I doing "wrong" with secure containers? Or, is this a bug?