title: Kubernetes exposed LoadBalancer service is very slow
body: <p>I have prepared two Kubernetes installations on AWS, one with <a href="https://aws.amazon.com/quickstart/architecture/heptio-kubernetes/" rel="nofollow noreferrer">Heptio Kubernetes Quick start</a> and the second one with <a href="https://aws.amazon.com/marketplace/pp/B072PSBJB2" rel="nofollow noreferrer">Rancher on RancherOS</a>. </p>
  
  <p>In both installations I run my hello-world app and configured the loadbalancing. After that accessing the app via loadbalancer is extremely slow - it takes around 10 seconds. If I access it via the browser, then just the first request is slow, subsequent requests are a lot faster.</p>
  
  <p>Here is what I do to configure my app:</p>
  
  <pre><code>kubectl run tporeba-docker-webapp --image=tporeba/tporeba-docker-webapp:latest --port=8080
  kubectl scale deployment tporeba-docker-webapp --replicas=5
  kubectl expose deployment/tporeba-docker-webapp --type="LoadBalancer" --port=80 --target-port=8080
  </code></pre>
  
  <p>Last command also creates the AWS loadbalancer, which dns name I can get by running:</p>
  
  <pre><code>kubectl describe service tporeba-docker-webapp | grep "LoadBalancer Ingress" | awk -P '{print $3'}
  </code></pre>
  
  <p>The used kubernetes versions are: 1.9.2 for heptio installation</p>
  
  <blockquote>
    <p>Server Version: version.Info{Major:"1", Minor:"9",
    GitVersion:"v1.9.2",
    GitCommit:"5fa2db2bd46ac79e5e00a4e6ed24191080aa463b<br>
    ", GitTreeState:"clean", BuildDate:"2018-01-18T09:42:01Z",
    GoVersion:"go1.9.2", Compiler:"gc", Platform:"linux/amd64"}</p>
  </blockquote>
  
  <p>and 1.8.5-rancher1 for Rancher installation relspectively:</p>
  
  <blockquote>
    <p>Server Version: version.Info{Major:"1", Minor:"8+",
    GitVersion:"v1.8.5-rancher1",
    GitCommit:"6cb179822b9f77893eac5612c91a0ed7c0941b45",
    GitTreeState:"clean", BuildDate:"2017-12-11T17:40:37Z",
    GoVersion:"go1.8.3", Compiler:"gc", Platform:"linux/amd64"}</p>
  </blockquote>
  
  <p>Am I doing something wrong with the configuration? Why the loadbalancer is causing such delays? When I configure the loadbalancing in Rancher (instead of K8s) then the response arrives in 0.5s. </p>
  
  <p>Any ideas?</p>