On 7 August 2017 at 09:50, Ben Pfaff <[email protected]> wrote: > On Sun, Aug 06, 2017 at 10:56:30PM -0700, Gurucharan Shetty wrote: > > We had one note about the issues with adding OVS interfaces > > in the "auto" section. This commit adds another note about > > how adding OVS bridges in the "auto" section can cause > > race conditions with systemd. > > > > Signed-off-by: Gurucharan Shetty <[email protected]> > > --- > > debian/openvswitch-switch.README.Debian | 8 ++++++++ > > 1 file changed, 8 insertions(+) > > > > diff --git a/debian/openvswitch-switch.README.Debian > b/debian/openvswitch-switch.README.Debian > > index 5f8f823..d236824 100644 > > --- a/debian/openvswitch-switch.README.Debian > > +++ b/debian/openvswitch-switch.README.Debian > > @@ -231,3 +231,11 @@ in the 'auto' section, openvswitch-switch will > forcefully be started when > > ifupdown kicks in. In a case like this, the admin needs to make sure > that /usr > > has already been mounted and that a remote $syslog (if used) is ready to > > receive openvswitch logs. > > + > > +* With systemd, adding openvswitch bridges in the 'auto' section of the > > +'interfaces' file can cause race conditions. Debian systems have added > a > > +systemd [email protected] file. This file will call ifdown and ifup on > interfaces > > +in "auto" section automatically when they disappear and appear > respectively. > > +This will cause race conditions if you delete and add the same bridges > using > > +tools like "ovs-vsctl" or "ovs-dpctl". This is also a problem when you > > +upgrade your openvswitch kernel module using commands like > 'force-reload-kmod'. > > I'm not really sure what the "auto" section is. Do you just mean that > they should not add lines like "auto br0" where br0 is an Open vSwitch > bridge? (I do see that there is already some wording about an "auto" > section.) > > Yes. Adding lines like "auto br0" is a license for systemd to handle them "automatically".
> Thanks, > > Ben. > _______________________________________________ dev mailing list [email protected] https://mail.openvswitch.org/mailman/listinfo/ovs-dev
