On Sat, Apr 27, 2013 at 9:13 AM, Grant Gainey <[email protected]> wrote:
> Hi Stefan, > > In general, I think you've hit the salient points. Comments inline. > > ----- Original Message ----- > > Hello world, > > > > are there any "best practice" documents for deploying Spacewalk > > servers to multiple data centers in a way that clients will > > load-balance and failover on their own? I think there are a number of > > challenges here: > > > > 1. The actual loadbalancing of HTTP(S) requests. That should be easy > > to handle. Some care should be taken WRT certificates, but that > > shouldn't be a major problem. > > Aye, pretty well-understood issues here. > > > 2. The (Oracle) database. Should be pretty easy to, set up a physical > > standby and if the primary fails, switchover to the standby > > instance, promote it, edit rhn.conf, restart Spacewalk servers. > > Sure, sounds reasonable. > > > 3. Actually getting the RPM files from one server to the other - > > rsync'ing them seems like the safest bet. > > Don't forget about cobbler's data. > 4. Taskomatic tasks - this one seems like the only real challenge: We > > don't want both spacewalk servers to e.g. scheduele automatic > > errata updates, or send reports. > > Yeah, you only want one taskomatic running, for that very reason. And > anything taskomatic does to/from disk (like, say, cobbler-syncing) will > only be on disks available to the instance where taskomatic is running. > > > Did I miss anything important here? Has anyone already done a setup > > like this and would like to share his/her experience? > > If you're looking at redundancy in the same DC, then fast disk shared by > all instances keeps your disk-data in sync automatically. > > If you actually mean "different data centers", then you'll have to get > that dealt with - as you say, rsync or something like it. > I use Gluster for this with synchronous local (in datacenter) replication and asynchronous geo replication to warm spares in a DR site. > I don't know that we have anything formal written up around this - maybe > someone else will chime in... > > Yes there is documentation on this for RHN Satellite and the instructions work for Spacewalk. https://access.redhat.com/site/documentation/en-US/Red_Hat_Network_Satellite/5.5/html/Installation_Guide/sect-Installation_Guide-Maintenance-Establishing_Redundant_Satellites_with_Stand_Alone_DB.html > Grant > > _______________________________________________ > Spacewalk-list mailing list > [email protected] > https://www.redhat.com/mailman/listinfo/spacewalk-list >
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