https://theithollow.com/tags/keepalived/ Recent content in Keepalived on The IT Hollow Hugo en-us Mon, 24 Feb 2020 15:05:00 +0000 https://theithollow.com/2020/02/24/highly-available-envoy-proxies-for-the-kubernetes-control-plane/ Mon, 24 Feb 2020 15:05:00 +0000 https://theithollow.com/2020/02/24/highly-available-envoy-proxies-for-the-kubernetes-control-plane/ <p>Recently I was tasked with setting up some virtual machines to be used as a load balancer for a Kubernetes cluster. The environment we were deploying our Kubernetes cluster didn&rsquo;t have a load balancer available, so we thought we&rsquo;d just throw some envoy proxies on some VMs to do the job. This post will show you how the following tasks were completed:</p> <ol> <li>Deploy Envoy on a pair of CentOS7 virtual machines.</li> <li>Configure Envoy with health checks for the Kubernetes Control Plane</li> <li>Install keepalived on both servers to manage failover.</li> <li>Configure keepalived to failover if a server goes offline, or the envoy service is not started.</li> </ol> <figure> <img loading="lazy" src="https://assets.theithollow.com/wp-content/uploads/2020/02/image-61-1024x495.png"/> </figure> <h2 id="deploy-envoy">Deploy Envoy</h2> <p>The first step will be to setup a pair of CentOS 7 servers. I&rsquo;ve used virtual servers for this post, but baremetal would work the same. Also, similar steps could be used if you prefer debian as your linux flavor.</p>