On Fri, May 29, 2015 at 05:07:19PM -0400, Russell Bryant wrote: > On 05/29/2015 04:50 PM, Ben Pfaff wrote: > > On Fri, Apr 24, 2015 at 01:06:06PM -0400, Russell Bryant wrote: > >> This patch creates a new subpackage for OVN, openvswitch-ovn. It also > >> installs systemd unit files for ovncontroller and ovnnorthd services. > >> Finally, it installs some template service configuration files into > >> /etc/sysconfig/. > >> > >> If you want to run ovn-controller on a host running ovs: > >> > >> # systemctl start ovncontroller > >> > >> If you want to run ovn-northd and ovsdb-server on a management host: > >> > >> # systemctl start ovnnorthd > >> > >> If you want to run all of ovs and ovn on the same host: > >> > >> # cat << EOF > /etc/sysconfig/openvswitch > >> OPTIONS="'--extra-dbs=ovnnb.db ovnsb.db'" > >> EOF > >> > >> # cat << EOF > /etc/sysconfig/ovnnorthd > >> OPTIONS="--no-ovsdb-server" > >> EOF > >> > >> # ovn-ctl create_ovn_dbs > >> # systemctl start openvswitch > >> # systemctl start ovnnorthd > >> # systemctl start ovncontroller > >> > >> Signed-off-by: Russell Bryant <rbry...@redhat.com> > > > > This looks nice but it seems awkward to have to edit config files if you > > want to run both OVS and OVN on a host. Do you think there's a way to > > make it simply a matter of starting both services? > > I agree that it's a little awkward. It's a bit better in the latest > rev, but you still have to create the ovn dbs and edit the openvswitch > config to use them. > > http://openvswitch.org/pipermail/dev/2015-May/055586.html > > I hadn't thought of a good way to make it better, but let's see ... > > I see that ovsdb-server supports a command over the appctl unix socket > to tell it to add a db. We could make ovn-northd automatically create > the dbs if they're not present and tell ovsdb-server to add them. That > should make it as simple as just starting the services.
You could make it tell ovsdb-server to add them, or you could just make it restart ovsdb-server, which is not very expensive (and all the clients will automatically reconnect). By the way, on Debian I got in some trouble for initially putting the OVS configuration DB into /etc/openvswitch, because the rule there is that only human-readable and -editable files should be in /etc. Thus, in the official Debian packaging the database is in /var/lib/openvswitch instead (with a symlink from /etc/openvswitch). This has been a thorn in my side ever since. It would be really nice, therefore, not to repeat the issue with the new databases, by putting them in /var/lib/openvswitch to begin with. > A downside is that would make a built-in assumption in ovn-northd that > it runs local to ovsdb-server. The systemd unit file assumes that right > now, but the code doesn't (and probably shouldn't). The same general > thing could be implemented in a shell wrapper for ovn-northd ... which > sounds kind of like ovn-ctl, so maybe I should go back to making use of > that. Sounds like you've got it all worked out. Thanks, Ben. _______________________________________________ dev mailing list dev@openvswitch.org http://openvswitch.org/mailman/listinfo/dev
