Another typical setup is to have each client node have its own haproxy, and when Riak nodes are added or removed (not a common occurrence, mind you), a configuration management tool like Chef/Puppet/cfengine/etc can adjust the config and signal the process to reload it (I think it's `kill -HUP`). Then your client code also only ever needs to connect to localhost, and doesn't have to have itself reconfigured.
On Mon, Jun 25, 2012 at 4:40 AM, Samuel Elliott <s...@lenary.co.uk> wrote: > On Mon, Jun 25, 2012 at 7:36 AM, Matt Black <matt.bl...@jbadigital.com> > wrote: > > Dear list, > > > > Does anyone have an opinion on the concept of putting a Riak cluster > behind > > a load balancer? > > It has been done before. there are various results when searching > "riak haproxy" in your favourite search engine. > > > > > We wish to be able to automatically add/remove nodes from the cluster, so > > adding an extra layer at the front is desirable. We should also benefit > for > > incoming requests behind shared across all nodes. > > > > Can anyone see any drawbacks / problems with doing this? > > If your load balancer falls over, what do you do then? Highly > available may go down the pan. Have more than one would be the obvious > answer. > > What do you do when you want to transparently add more machines to > your load balancer? > > Maybe it might be better to have a list of riak nodes stored in a > separate registry (I'm thinking something like zookeeper), that your > application servers can then poll for changes (or even subscribe to > changes) to the list of servers. > > Sam > > > > > Thanks > > Matt > > > > > > _______________________________________________ > > riak-users mailing list > > riak-users@lists.basho.com > > http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com > > > > > > -- > Samuel Elliott > s...@lenary.co.uk > http://lenary.co.uk/ > +44 (0)7891 993 664 > > _______________________________________________ > riak-users mailing list > riak-users@lists.basho.com > http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com > -- Sean Cribbs <s...@basho.com> Software Engineer Basho Technologies, Inc. http://basho.com/
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