Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Lars Ellenberg wrote: > don't do that. > won't work with any handlers. > for the "floating peer" stuff to work in practice, > we'd need much more work in the user land tools. > > while a neat idea in theory, > it does not work out in practice. > > it even uses an undocumented "hack", > namely setting the "__DRBD_NODE__" environment variable, > which was introduced solely to make it more easy for me > to "sanity check" drbd config files sent to me to comment on, > using the "dump" and "-d up" and similar commands. > it was never intended to be actually used. ok, i never realized that as it was explicitly mentioned in the linux-ha documentation. > so the whole "floating peer" stuff is a hack in itself. > does anybody out there really use it? well, if you have not got a dedicated storage subsystem with 2/3 nodes but rely on e.g. 2 nodes out of 5 doing the mirroring and offering files via nfs, or you do not care where service x is started but need the drbd device for it to function properly, or you want to have some "hot-spare-nodes" for your cluster, it sounds like "a neat idea" :) but i've only used it in cases where i too would be able to use the actual hostname(s). > it might be possible to get this hack sort of working > by adding more hacks. like telling the kernel which > "nodename" to fake when calling the user space helpers. > > but I don't think that would be a good idea. correct me if i am wrong but saving the node's alias during drbdadm attach/up/etc. shouldn't be that bad, because it already has been used to find the right configuration from the drbd.conf file anyway. cheers, raoul -- ____________________________________________________________________ DI (FH) Raoul Bhatia M.Sc. email. r.bhatia at ipax.at Technischer Leiter IPAX - Aloy Bhatia Hava OEG web. http://www.ipax.at Barawitzkagasse 10/2/2/11 email. office at ipax.at 1190 Wien tel. +43 1 3670030 FN 277995t HG Wien fax. +43 1 3670030 15 ____________________________________________________________________