On Fri, Aug 4, 2017 at 1:00 PM, Aaron Conole <acon...@redhat.com> wrote:
> After this commit, users may start a dpdk-enabled ovs setup as a
> non-root user.  This is accomplished by exporting the $HOME directory,
> which dpdk uses to fill in it's semi-persistent RTE configuration.
>
> This change may be a bit controversial since it modifies /dev/hugepages
> as part of starting the ovs-vswitchd to set a hugetlbfs group
> ownership.  This is used to enable writing to /dev/hugepages so that the
> dpdk_init will successfully complete.  There is an alternate way of
> accomplishing this - namely to initialize DPDK before dropping
> privileges.  However, this would mean that if DPDK ever grows an uninit
> / reinit function, non-root ovs likely could never use it.

Indeed ... the modifications to /dev/hugepages don't look ideal ...

If this was truly limited to when DPDK was in use, I'd feel better
about it.  We want to build a single package for OVS, right?  The
package will have DPDK enabled, even for normal uses that won't use
DPDK.  That means these modifications take place even for non-DPDK
use.  I'd feel more comfortable if it could be restricted to only when
DPDK was actually in use.  Maybe some of this logic could be moved
into ovs-ctl so that the check could be at runtime?

>
> This does not change OvS+DPDK's SELinux requirements.  It still must be
> disabled.
>
> Signed-off-by: Aaron Conole <acon...@redhat.com>
> ---
>  Documentation/intro/install/dpdk.rst                |  7 +++++++
>  NEWS                                                |  1 +
>  rhel/README.RHEL.rst                                | 11 +++++++++++
>  rhel/openvswitch-fedora.spec.in                     | 13 +++++++++++++
>  rhel/usr_lib_systemd_system_ovs-vswitchd.service.in |  5 +++++
>  5 files changed, 37 insertions(+)
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