We use www.dnsmadeeasy.com (unsolicited plug) to do automatic DNS failover that Joris is describing. It works well for us.
My colleague and I theorized another option would be to run your HAProxy instances as Amazon EC2 instances (one each in different availability zones) with an elastic IP. That way you'd be taking advantage of Amazon's routing network without having to build your own. Like I said, that's only been theorized. I haven't actually done that. --- David Prothero I.T. Director Pharmacist's Letter / Prescriber's Letter Natural Medicines Comprehensive Database Ident-A-Drug / www.therapeuticresearch.com (209) 472-2240 x231 (209) 472-2249 (fax) -----Original Message----- From: joris dedieu [mailto:joris.ded...@gmail.com] Sent: Thursday, November 03, 2011 1:19 AM To: haproxy@formilux.org Subject: Re: haproxy and multi location failover 2011/11/1 Senthil Naidu <senthil.na...@gmail.com>: > hi, > > we need to have a setup as follows > > > > site 1 site 2 > > LB (ip 1) LB (ip 2) > | | > | | > srv1 srv2 srv1 srv2 > > site 1 is primary and site 2 is backup in case of site 1 LB's failure > or failure of all the servers in site1 the website should work from > backup location servers. Unless you have your own routing, if you want no downtime for nobody you have to imagine a more complex scenario. Has said below the only way to switch for a datacenter to an other is to use dns. So you have to find a solution for waiting dns propagation to be complete. I'll do something like : 1) if lb1 fail - change dns - srv1-1 become a lb for himself and srv2-1 2) if srv1-1 and srv2-1 fail - change dns - ld1 forward requests for lb2 (maybe slow but better than nothing). and so one ... Joris > > Regards > > On Tue, Nov 1, 2011 at 10:31 PM, Gene J <gh5...@gmail.com> wrote: >> >> Please provide more detail about what you are hosting and what you >> want to achieve with multiple sites. >> >> -Eugene >> >> On Nov 1, 2011, at 9:58, Senthil Naidu <senthil.na...@gmail.com> wrote: >> >> Hi, >> >> thanks for the reply, if the same needs to be done with dns do we >> need any external dns services our we can use our own ns1 and ns2 for the >> same. >> >> Regards >> >> >> On Tue, Nov 1, 2011 at 9:06 PM, Baptiste <bed...@gmail.com> wrote: >>> >>> Hi, >>> >>> Do you want to failover the Frontend or the Backend? >>> If this is the frontend, you can do it through DNS or RHI (but you >>> need your own AS). >>> If this is the backend, you have nothing to do: adding your servers >>> in the conf in a separated backend, using some ACL to take failover >>> decision and you're done. >>> >>> cheers >>> >>> >>> On Tue, Nov 1, 2011 at 2:25 PM, Senthil Naidu >>> <senthil.na...@gmail.com> >>> wrote: >>> > Hi, >>> > >>> > Is it possible to use haproxy in a active/passive failover >>> > scenario between multiple datacenters. >>> > >>> > Regards >>> > >>> > >>> > >>> > >> > >
