https://pprakash.me/tags/kubernetes/ Recent content in Kubernetes on Technology Enlightened Hugo en &copy; <a href="https://github.com/p-prakash/">Prakash P</a> 2015 - 2023 Mon, 27 Feb 2023 08:00:00 +0100 https://pprakash.me/tech/2023/02/27/optimize-aks-node-cost-by-combining-spot-ondemand-vms/ Mon, 27 Feb 2023 08:00:00 +0100 https://pprakash.me/tech/2023/02/27/optimize-aks-node-cost-by-combining-spot-ondemand-vms/ <h2 id="overview">Overview</h2> <p>While it&rsquo;s possible to run the kubernetes nodes either in on-demand or spot node pools separately. We can optimize the application cost without compromising the reliability by placing the pods unevenly on spot and OnDemand VMs using the <strong><a href="https://kubernetes.io/docs/concepts/scheduling-eviction/topology-spread-constraints/">topology spread constraints</a></strong>. With baseline amount of pods deployed in OnDemand node pool offering reliability we can scale on spot node pool based on the load at a lower cost. In this post, we will go through step by step approach on deploying an application spread unevenly on spot and OnDemand VMs.</p>