title: Application ELB - sticky sessions based on consistent hashing
body: <p>I couldn't find anything in the documentation but still writing to make sure I did not miss it. I want all connections from different clients with the same value for a certain request parameter to end up on the same upstream host. With ELB sticky session, you can have the same client connect to the same host but no guarantees across different clients.</p>
  
  <p>This is possible with Envoy proxy, see: <a href="https://www.envoyproxy.io/docs/envoy/latest/intro/arch_overview/upstream/load_balancing/load_balancers#ring-hash" rel="nofollow noreferrer">https://www.envoyproxy.io/docs/envoy/latest/intro/arch_overview/upstream/load_balancing/load_balancers#ring-hash</a></p>
  
  <p>We already use ELB so if the above is possible with ELB then we can avoid introducing another layer in between with envoy.</p>
  
  <p>UPDATE:
  Use-case - in a multi-tenant cloud solution, we want all clients from a given customer account to connect to the same upstream host.</p>