[Libguestfs] Notes on building libguestfs in a systemd-nspawn container

Last night I was tinkering with `systemd-nspawn` -- namespace based container for testing, I thought I'll post what I tried with libguestfs here: Prerequisite ------------ Because of an audit subsystem incompatibility bug - rhbz#966807[1], turn off auditing by booting the host w/ 'audit=0' on Kernel command line. (NOTE: There's work in progress[2] in upstream Kernel to fix this.) Create container ---------------- On the host, specify an installroot (/srv) and install a minimal Fedora 20 distribution: $ yum -y --releasever=20 --nogpg \ --installroot=/srv/testcontainer \ --disablerepo='*' --enablerepo=fedora \ install systemd passwd yum \ fedora-release vim-minimal Boot into the container, set a password: $ systemd-nspawn -D /srv/testcontainer [. . .] -bash-4.2# passwd Start the container w/ systemd: $ systemd-nspawn -bD /srv/testcontainer [. . .] -bash-4.2# Building Libguestfs ------------------- Inside the minimal Fedora 20 container, install libguestfs dependencies, clone the libguestfs git repository: -bash-4.2# yum-builddep libguestfs -y -bash-4.2# git clone git://github.com/libguestfs/libguestfs.git Build and test libguestfs in the container: -bash-4.2# cd libguestfs -bash-4.2# ./autogen.sh && time make 2>&1 \ | tee /tmp/libguestfs-compile.log -bash-4.2# time make -k check \ LIBGUESTFS_DEBUG=1 LIBGUESTFS_TRACE=1 2>&1 \ | tee /tmp/libguestfs-test.log Notes ----- - If you need to build a container without networking (once all the relevant dependencies are cloned/and network related operations are done), the container can be invoked with no network devices (except loopback): $ systemd-nspawn -bD /srv/testcontainer --private-network [. . .] -bash-4.2# - Single `make` job timing to compile everything: real 31m9.792s user 17m18.359s sys 13m17.868s - `make -k check` is still running as I write this, albeit a bit slow. [1] https://bugzilla.redhat.com/show_bug.cgi?id=966807 [2] https://www.redhat.com/archives/linux-audit/2013-May/msg00065.html -- /kashyap