It depends on the language/platform you use.
If Java, all is very easy - NodeClient connects to more than one node, and
also TransportClient "sniff" mode. So Java clients are using fault tolerant
connection mode.
Same do the official clients, but only if configured properly. Please study
how to connect official ES clients to more than one node of a cluster.
"Load balancing" can be achieved by adding more connections to the client.
Since each node knows the cluster state and can find out how to route
requests to the involved nodes, this is not always required. This is an
internal ES mechanism.
No haproxy needed. Even if haproxy is used, haproxied requests are
balanced/routed once more in the ES internals. So you will end up in
"double load balancing".
Jörg
On Tue, Jan 27, 2015 at 1:03 PM, phani.nadiminti@goktree.com wrote:
Hi All,
i know a concept of load balancer in elastic search which is HTTP
enabled and never be a master and doesn't hold any data. my doubt is if we
introduce client node called as loadbalancer in cluster is there any need
to setup haproxy for the cluster to forward request.if there is no need of
haproxy please let me know how to achieve fail over using load balancer.
suppose in my cluster i don't have load balancer nodes how can we
manage request forward settings . let say node 1 is down but we configured
node1 in client application.users will hit node1 from client application
but node1 is down in this case how can we forward request to client with
out haproxy?
Thanks
phani.
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