Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Did you had also database in /ha directory? For WWW servers usually better looks some GFS + loadbalancing sollution in my opinion. Loadbalancer check if servers are available and split load. I'm starting to loos ideas what DRBD can give me. I looked at the beginning very good but now I can't find big profits. The biggest problem is that data is not visible in both hosts without remount. Virtua machine - interesting solution... bit virtual machine is usualy one big file. Isn't that a problem? Isn't synchronizing open file problem? Helmut Wollmersdorfer-3 wrote: > > > Am 31.05.2012 um 14:23 schrieb agag: > >> My first idea is to have in example WWW server and when one crashes, >> second >> is working without any additional admin tasks. > > You can do this with a drbd-device as primary/secondary, mounted e.g. > as /ha, and having your webspace, logs, configs etc. somewhere under / > ha. Then configure pacemaker with IP-failover etc. and it works as > long as one of the cluster-nodes is alive. > > I had such a configuration since ~2004 with heartbeat and drbd-0.7. > Disadvantage is, taht you need to take care of all dependencies like > cron-jobs, webstats, users etc. and maybe need to modify some scripts. > >> >> Second idea is to have almost identical operating systems. For >> example to >> use drbd replicated data for /etc and /bin (wich will be modified >> only in >> primary/first serverd when changes or updates are done). Is it >> possible >> somehow? > > You can use it for the whole / (root-filesystem), if you start an > virtual machine on a drbd-device. That's most convenient as everything > is replicated. It works in primary/secondary, with a downtime of > shutdown+bootup. > > Helmut Wollmersdorfer > > _______________________________________________ > drbd-user mailing list > drbd-user at lists.linbit.com > http://lists.linbit.com/mailman/listinfo/drbd-user > > -- View this message in context: http://old.nabble.com/see-replicated-data-tp33895972p33938621.html Sent from the DRBD - User mailing list archive at Nabble.com.