On Friday 27 July 2007 15:45:19 Lon Hohberger wrote: > On Wed, Jul 25, 2007 at 08:50:17PM +0200, Mark Hlawatschek wrote: > > > > I'd like to use the "depend" feature of rgmanager on RHEL4. Is there > > > > a way to do this. E.g. would it be possible to run the cvs HEAD > > > > version of rgmanager on a RHEL4.5 cluster infrastructure ? > > > > > > It doesn't build on RHEL4 right now; there's no equivalent to > > > 'cman_get_fenceinfo()'. > > > > > > If you #if 0 out the 'node_fenced()' body and return 1, it builds. I > > > don't know if it will run... but it builds ;) > > > > > > It doesn't appear there's an equivalent function; so to implement it, > > > one would have to perhaps parse /proc/cluster/services or something > > > like that... > > > > What does the prototype of cman_get_fenceinfo() look like ? What is it > > meant to do ? > > It gets the time the node was last fenced from CMAN. When a node > rejoins the cluster, this information is cleared. > > So, what rgmanager does is effectively: > nodeX died > does nodeX have fencing configured? > yes > wait for node X to be fenced or rejoin the cluster > no > continue > > > Is there another way to get the "depend" feature back-ported ? > > I think there's already a feature request open about it, by you? Yes, there are two feature requests open that address service dependencies 247980 - RFE: (strong and weak) service dependencies 247772 - RFE: One service following another > > Implementation-wise, in RHEL5, there's an event queue for service state > changes, and a function which broadcasts starts/stops > (broadcast_event()). The difference is that in RHEL5, you can multicast > to all rgmanagers w/ one call - whereas on RHEL4, you have to open a > connection to each and send the message individually. > > So, basically, it involves porting the event queue code and implementing > broadcast_event(). OK, how much effort - in your opinion - would it be to port/implement these features ? Is there a task scheduled to do these things ? Thanks, Mark -- Gruss / Regards, Dipl.-Ing. Mark Hlawatschek Phone: +49-89 452 3538-15 http://www.atix.de/ http://www.open-sharedroot.org/ ** ATIX Informationstechnologie und Consulting AG Einsteinstr. 10 85716 Unterschleissheim Deutschland/Germany Phone: +49-89 452 3538-0 Fax: +49-89 990 1766-0 Registergericht: Amtsgericht Muenchen Registernummer: HRB 168930 USt.-Id.: DE209485962 Vorstand: Marc Grimme, Mark Hlawatschek, Thomas Merz (Vors.) Vorsitzender des Aufsichtsrats: Dr. Martin Buss -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
