{"id":6262,"date":"2022-11-07T13:30:40","date_gmt":"2022-11-07T12:30:40","guid":{"rendered":"https:\/\/cloudification.io\/2022\/11\/07\/kubernetes-autoscaling-copy\/"},"modified":"2023-07-06T12:33:11","modified_gmt":"2023-07-06T11:33:11","slug":"karpenter-cluster-autoscaler","status":"publish","type":"post","link":"https:\/\/cloudification.io\/cloud-blog\/karpenter-cluster-autoscaler\/","title":{"rendered":"Karpenter"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"6262\" class=\"elementor elementor-6262\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-6ac01c4 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"6ac01c4\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-b82bca4 layouts-column-align-inherit layouts-section-position-none\" data-id=\"b82bca4\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"hf-elementor-layout elementor-element elementor-element-972c6c8 elementor-widget elementor-widget-heading\" data-id=\"972c6c8\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.20.0 - 20-03-2024 *\/\n.elementor-heading-title{padding:0;margin:0;line-height:1}.elementor-widget-heading .elementor-heading-title[class*=elementor-size-]>a{color:inherit;font-size:inherit;line-height:inherit}.elementor-widget-heading .elementor-heading-title.elementor-size-small{font-size:15px}.elementor-widget-heading .elementor-heading-title.elementor-size-medium{font-size:19px}.elementor-widget-heading .elementor-heading-title.elementor-size-large{font-size:29px}.elementor-widget-heading .elementor-heading-title.elementor-size-xl{font-size:39px}.elementor-widget-heading .elementor-heading-title.elementor-size-xxl{font-size:59px}<\/style><h1 class=\"elementor-heading-title elementor-size-default\">Did you know Karpenter is one of the newest and fastest cluster autoscalers?\n<\/h1>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-d09d084 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"d09d084\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-6018aac layouts-column-align-inherit layouts-section-position-none\" data-id=\"6018aac\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"hf-elementor-layout elementor-element elementor-element-979fc55 elementor-widget elementor-widget-spacer\" data-id=\"979fc55\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.20.0 - 20-03-2024 *\/\n.elementor-column .elementor-spacer-inner{height:var(--spacer-size)}.e-con{--container-widget-width:100%}.e-con-inner>.elementor-widget-spacer,.e-con>.elementor-widget-spacer{width:var(--container-widget-width,var(--spacer-size));--align-self:var(--container-widget-align-self,initial);--flex-shrink:0}.e-con-inner>.elementor-widget-spacer>.elementor-widget-container,.e-con>.elementor-widget-spacer>.elementor-widget-container{height:100%;width:100%}.e-con-inner>.elementor-widget-spacer>.elementor-widget-container>.elementor-spacer,.e-con>.elementor-widget-spacer>.elementor-widget-container>.elementor-spacer{height:100%}.e-con-inner>.elementor-widget-spacer>.elementor-widget-container>.elementor-spacer>.elementor-spacer-inner,.e-con>.elementor-widget-spacer>.elementor-widget-container>.elementor-spacer>.elementor-spacer-inner{height:var(--container-widget-height,var(--spacer-size))}.e-con-inner>.elementor-widget-spacer.elementor-widget-empty,.e-con>.elementor-widget-spacer.elementor-widget-empty{position:relative;min-height:22px;min-width:22px}.e-con-inner>.elementor-widget-spacer.elementor-widget-empty .elementor-widget-empty-icon,.e-con>.elementor-widget-spacer.elementor-widget-empty .elementor-widget-empty-icon{position:absolute;top:0;bottom:0;left:0;right:0;margin:auto;padding:0;width:22px;height:22px}<\/style>\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-905fab7 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"905fab7\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-4126c36 layouts-column-align-inherit layouts-section-position-none\" data-id=\"4126c36\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"hf-elementor-layout elementor-element elementor-element-af7422f elementor-widget elementor-widget-heading\" data-id=\"af7422f\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">First things first: What is an autoscaler?<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-f1ed445 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"f1ed445\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-da8cc86 layouts-column-align-inherit layouts-section-position-none\" data-id=\"da8cc86\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"hf-elementor-layout elementor-element elementor-element-a215d11 elementor-widget elementor-widget-text-editor\" data-id=\"a215d11\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.20.0 - 20-03-2024 *\/\n.elementor-widget-text-editor.elementor-drop-cap-view-stacked .elementor-drop-cap{background-color:#69727d;color:#fff}.elementor-widget-text-editor.elementor-drop-cap-view-framed .elementor-drop-cap{color:#69727d;border:3px solid;background-color:transparent}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap{margin-top:8px}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap-letter{width:1em;height:1em}.elementor-widget-text-editor .elementor-drop-cap{float:left;text-align:center;line-height:1;font-size:50px}.elementor-widget-text-editor .elementor-drop-cap-letter{display:inline-block}<\/style>\t\t\t\t<p><span style=\"font-weight: 400;\">Kubernetes is the most popular solution today for container management and orchestration capacity. However, one of its best features, namely its ability to scale infrastructure dynamically based on user demand often takes a back seat.<\/span><\/p><p><span style=\"font-weight: 400;\">Kubernetes has multiple layers of auto scaling functionality:\u00a0<\/span><\/p><ul><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Pod-based scaling (Horizontal and Vertical Pod AutoScaler)\u00a0<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Node-based (Cluster AutoScaler)<\/span><\/li><\/ul><p><span style=\"font-weight: 400;\">A Kubernetes Cluster is a set of node machines that run containerized applications. Inside those nodes, Pods run containers that demand resources like CPU, Memory and sometimes disk or GPU.<\/span><\/p><p><span style=\"font-weight: 400;\">A Cluster Autoscaler can add or remove Nodes in a Cluster automatically depending on the resource requests from Pods. The size of the cluster is increased when there are pods that are not able to be scheduled due to resource shortages. It is possible to configure a limit so that the Autoscaler does not scale up or down past a certain number of machines. Nowadays, almost every cloud provider has a way of\u00a0 scaling Kubernetes Clusters automatically.<\/span><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"hf-elementor-layout elementor-element elementor-element-0f256d4 elementor-widget elementor-widget-image\" data-id=\"0f256d4\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.20.0 - 20-03-2024 *\/\n.elementor-widget-image{text-align:center}.elementor-widget-image a{display:inline-block}.elementor-widget-image a img[src$=\".svg\"]{width:48px}.elementor-widget-image img{vertical-align:middle;display:inline-block}<\/style>\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" width=\"3757\" height=\"2500\" src=\"https:\/\/cloudification.io\/wp-content\/uploads\/2022\/11\/Blog-image-23.png\" class=\"attachment-full size-full wp-image-6271\" alt=\"\" srcset=\"https:\/\/cloudification.io\/wp-content\/uploads\/2022\/11\/Blog-image-23.png 3757w, https:\/\/cloudification.io\/wp-content\/uploads\/2022\/11\/Blog-image-23-300x200.png 300w, https:\/\/cloudification.io\/wp-content\/uploads\/2022\/11\/Blog-image-23-1024x681.png 1024w, https:\/\/cloudification.io\/wp-content\/uploads\/2022\/11\/Blog-image-23-768x511.png 768w, https:\/\/cloudification.io\/wp-content\/uploads\/2022\/11\/Blog-image-23-1536x1022.png 1536w, https:\/\/cloudification.io\/wp-content\/uploads\/2022\/11\/Blog-image-23-2048x1363.png 2048w\" sizes=\"100vw\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-db53bdb elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"db53bdb\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-fd49025 layouts-column-align-inherit layouts-section-position-none\" data-id=\"fd49025\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"hf-elementor-layout elementor-element elementor-element-413a4ca elementor-widget elementor-widget-spacer\" data-id=\"413a4ca\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"hf-elementor-layout elementor-element elementor-element-39557c3 elementor-widget elementor-widget-text-editor\" data-id=\"39557c3\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">However, cluster autoscalers do have some limitations such as:<\/span><\/p><ul><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">It does not take actual CPU\/GPU\/Memory usage into account, rather just resource requests and limits.<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Downtime or latency in services can occur given that scaling up is not immediate.<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Scaling down is not guaranteed.<\/span><\/li><\/ul><p><span style=\"font-weight: 400;\">Here is where Karpenter enters the picture. Karpenter was developed by AWS Labs with the objective to overcome these limitations. Let\u2019s learn more about it.<\/span><\/p><p>You can check out our <a title=\"Kubernetes Autoscaling\" href=\"https:\/\/cloudification.io\/cloud-blog\/kubernetes-autoscaling-autoscaler-types\/\" target=\"_blank\" rel=\"noopener\">article about Kubernetes Autoscalers<\/a> for a more detailed description.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-0adad63 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"0adad63\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-7bec464 layouts-column-align-inherit layouts-section-position-none\" data-id=\"7bec464\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"hf-elementor-layout elementor-element elementor-element-8d5be3c elementor-widget elementor-widget-spacer\" data-id=\"8d5be3c\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"hf-elementor-layout elementor-element elementor-element-b7acf78 elementor-widget elementor-widget-heading\" data-id=\"b7acf78\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">What is Karpenter?\n<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-4df5621 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"4df5621\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-c8ea1a3 layouts-column-align-inherit layouts-section-position-none\" data-id=\"c8ea1a3\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"hf-elementor-layout elementor-element elementor-element-925c462 elementor-widget elementor-widget-text-editor\" data-id=\"925c462\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Karpenter is an open-source and vendor neutral cluster autoscaling tool. It is a flexible, high-performance service that is meant to run inside of Kubernetes clusters.<\/span><\/p><p><span style=\"font-weight: 400;\">It automatically provides compute resources as needed in order to handle cluster&#8217;s applications, for instance it can provide new nodes in response to unschedulable pods by observing events within the Kubernetes cluster, and then sending commands to the underlying cloud provider.<\/span><\/p><p><span style=\"font-weight: 400;\">Without Karpenter, Kubernetes users would need to dynamically adjust the compute capacity of their clusters to support applications using Amazon EC2 Auto Scaling groups and the Kubernetes Cluster Autoscaler, which can be challenging and restrictive.<\/span><\/p><p><span style=\"font-weight: 400;\">The ability to launch right-sized compute resources automatically in response to changing application load, helps improve availability of the application and the efficiency of the clusters. Furthermore, Karpenter provides just-in-time compute resources and will soon be able to automatically optimize a cluster\u2019s compute resource footprint in order to reduce costs and improve performance.<\/span><\/p><p><span style=\"font-weight: 400;\">Karpenter is designed to let you take full advantage of the cloud with fast and simple compute provisioning for Kubernetes clusters.<\/span><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-cac2c2b elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"cac2c2b\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-4a5301d layouts-column-align-inherit layouts-section-position-none\" data-id=\"4a5301d\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"hf-elementor-layout elementor-element elementor-element-41ee16e elementor-widget elementor-widget-spacer\" data-id=\"41ee16e\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"hf-elementor-layout elementor-element elementor-element-cde84c9 elementor-widget elementor-widget-heading\" data-id=\"cde84c9\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">How does it work?\n<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-d48aca8 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"d48aca8\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-afa4e1e layouts-column-align-inherit layouts-section-position-none\" data-id=\"afa4e1e\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"hf-elementor-layout elementor-element elementor-element-7890080 elementor-widget elementor-widget-text-editor\" data-id=\"7890080\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Karpenter observes events within the Kubernetes cluster and then sends commands to the underlying cloud provider\u2019s compute service.<\/span><\/p><p><span style=\"font-weight: 400;\">When Karpenter is installed, it observes the Pod specifications of unschedulable Pods, calculates the aggregate resource requests and makes decisions to launch and terminate nodes to reduce scheduling latencies and infrastructure cost.\u00a0<\/span><\/p><p><span style=\"font-weight: 400;\">Karpenter has a Custom Resource Definition (CRD) called Provisioner. The Provisioner specifies the node provisioning configuration including instance size\/type, topology <\/span><i><span style=\"font-weight: 400;\">(e.g. availability zone)<\/span><\/i><span style=\"font-weight: 400;\">, architecture <\/span><i><span style=\"font-weight: 400;\">(e.g. arm64, amd64)<\/span><\/i><span style=\"font-weight: 400;\">, and lifecycle type <\/span><i><span style=\"font-weight: 400;\">(e.g. spot, on-demand, preemptible)<\/span><\/i><span style=\"font-weight: 400;\">.<\/span><\/p><p><span style=\"font-weight: 400;\">In order to keep the nodes up to date with the latest AMI or if a node is no longer needed, Karpenter can deprovision it.\u00a0<\/span><\/p><p><span style=\"font-weight: 400;\">There are two events that trigger finalization: node expiry config <\/span><i><span style=\"font-weight: 400;\">(ttlSecondsUntilExpired)<\/span><\/i><span style=\"font-weight: 400;\"> or when the last workload running on Karpenter provisioned node is terminated. These events will cordon the nodes, drain the Pods, terminate the underlying compute resource, and delete the node object.<\/span><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"hf-elementor-layout elementor-element elementor-element-1df4d3b elementor-widget elementor-widget-spacer\" data-id=\"1df4d3b\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-10c2ca9 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"10c2ca9\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-d7fc37c layouts-column-align-inherit layouts-section-position-none\" data-id=\"d7fc37c\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"hf-elementor-layout elementor-element elementor-element-c352a60 elementor-widget elementor-widget-text-editor\" data-id=\"c352a60\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><b>Here is an overview of Karpenter\u2019s functions:<\/b><\/p><ul><li style=\"font-weight: 400;\" aria-level=\"1\"><b><i>Watching<\/i><\/b><b> &#8211;<\/b> <span style=\"font-weight: 400;\">looks for pods that the Kubernetes scheduler has marked as unschedulable<br \/><\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><b><i>Evaluating<\/i><\/b><b> &#8211; <\/b><span style=\"font-weight: 400;\">direct provision of Just-in-time capacity of the node. (Groupless Node Autoscaling). <\/span><span style=\"font-weight: 400;\">Scheduling constraints (resource requests, nodeselectors, affinities, tolerations, and topology spread constraints) requested by the pods<br \/><\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><b><i>Provisioning<\/i><\/b><span style=\"font-weight: 400;\"> nodes that meet the requirements of the pods<br \/><\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><b><i>Scheduling<\/i><\/b><span style=\"font-weight: 400;\">\u00a0 pods to run on the new nodes<br \/><\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><b><i>Removing<\/i><\/b> <span style=\"font-weight: 400;\">\u00a0nodes that are no longer used<\/span><\/li><\/ul>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"hf-elementor-layout elementor-element elementor-element-85e6170 elementor-widget elementor-widget-image\" data-id=\"85e6170\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<img width=\"2142\" height=\"1204\" src=\"https:\/\/cloudification.io\/wp-content\/uploads\/2022\/11\/karpenter-overview.png\" class=\"attachment-full size-full wp-image-6267\" alt=\"\" srcset=\"https:\/\/cloudification.io\/wp-content\/uploads\/2022\/11\/karpenter-overview.png 2142w, https:\/\/cloudification.io\/wp-content\/uploads\/2022\/11\/karpenter-overview-300x169.png 300w, https:\/\/cloudification.io\/wp-content\/uploads\/2022\/11\/karpenter-overview-1024x576.png 1024w, https:\/\/cloudification.io\/wp-content\/uploads\/2022\/11\/karpenter-overview-768x432.png 768w, https:\/\/cloudification.io\/wp-content\/uploads\/2022\/11\/karpenter-overview-1536x863.png 1536w, https:\/\/cloudification.io\/wp-content\/uploads\/2022\/11\/karpenter-overview-2048x1151.png 2048w\" sizes=\"100vw\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-4d59f81 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"4d59f81\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-09a5bd8 layouts-column-align-inherit layouts-section-position-none\" data-id=\"09a5bd8\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"hf-elementor-layout elementor-element elementor-element-f83ad77 elementor-widget elementor-widget-spacer\" data-id=\"f83ad77\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"hf-elementor-layout elementor-element elementor-element-005cf68 elementor-widget elementor-widget-heading\" data-id=\"005cf68\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">What makes Karpenter great?\n<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-dd6ab3d elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"dd6ab3d\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-979be20 layouts-column-align-inherit layouts-section-position-none\" data-id=\"979be20\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"hf-elementor-layout elementor-element elementor-element-182cbaa elementor-widget elementor-widget-text-editor\" data-id=\"182cbaa\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Karpenter<\/span><b> improves application availability<\/b><span style=\"font-weight: 400;\"> by responding quickly and automatically to changes in application load, scheduling, and resource requirements. This allows new workloads to be placed onto a variety of available compute resource capacity.<\/span><\/p><p><span style=\"font-weight: 400;\">Infrastructure <\/span><b>costs are reduced<\/b><span style=\"font-weight: 400;\"> by looking for under-utilized nodes and removing them, also by replacing expensive nodes with cheaper alternatives, and by consolidating workloads onto more efficient compute resources.<\/span><\/p><p><span style=\"font-weight: 400;\">Karpenter also manages to <\/span><b>minimize operational overhead<\/b><span style=\"font-weight: 400;\"> with a set of opinionated defaults in a single, declarative Provisioner resource which can easily be customized. For this, there is no additional configuration required.<\/span><\/p><p>\u00a0<\/p><p><span style=\"font-weight: 400;\">Karpenter has two control loops that maximize the availability and efficiency of the cluster.<\/span><\/p><ul><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>Allocator<\/strong> \u2014 ensures fast scheduling of pending pods on nodes. Allocator acts as a fast-acting controller.<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>Reallocator<\/strong> \u2014 when excess node capacity is reallocated as pods are evicted then reallocator comes in Picture. The Reallocator is a slow-acting cost-sensitive controller that ensures that excess node capacity is reallocated as pods are evicted.\u00a0<\/span><\/li><\/ul>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-39676d6 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"39676d6\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-457287e layouts-column-align-inherit layouts-section-position-none\" data-id=\"457287e\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"hf-elementor-layout elementor-element elementor-element-677ec03 elementor-widget elementor-widget-spacer\" data-id=\"677ec03\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"hf-elementor-layout elementor-element elementor-element-92a84d6 elementor-widget elementor-widget-heading\" data-id=\"92a84d6\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Conclusion<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-3d12919 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"3d12919\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-41890e3 layouts-column-align-inherit layouts-section-position-none\" data-id=\"41890e3\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"hf-elementor-layout elementor-element elementor-element-52886a5 elementor-widget elementor-widget-text-editor\" data-id=\"52886a5\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"flex-1 overflow-hidden\"><div class=\"react-scroll-to-bottom--css-gbfog-79elbk h-full dark:bg-gray-800\"><div class=\"react-scroll-to-bottom--css-gbfog-1n7m0yu\"><div class=\"flex flex-col text-sm dark:bg-gray-800\"><div class=\"group w-full text-gray-800 dark:text-gray-100 border-b border-black\/10 dark:border-gray-900\/50 bg-gray-50 dark:bg-[#444654]\"><div class=\"flex p-4 gap-4 text-base md:gap-6 md:max-w-2xl lg:max-w-[38rem] xl:max-w-3xl md:py-6 lg:px-0 m-auto\"><div class=\"relative flex w-[calc(100%-50px)] flex-col gap-1 md:gap-3 lg:w-[calc(100%-115px)]\"><div class=\"flex flex-grow flex-col gap-3\"><div class=\"min-h-[20px] flex items-start overflow-x-auto whitespace-pre-wrap break-words flex-col gap-4\"><div class=\"markdown prose w-full break-words dark:prose-invert light\"><p>Karpenter emerges as one of the newest cluster autoscalers, addressing the limitations faced by traditional Kubernetes autoscalers.<\/p><p>It enhances application availability, improves cluster efficiency and is able to launch right-sized compute resources and optimize a cluster&#8217;s compute resource footprint.<\/p><p>It proves to be a great tool for organizations that are looking to optimize their Kubernetes clusters in AWS environment, allowing to scale with ease and agility while reaping the benefits of cost-efficiency and enhanced application performance.<\/p><p>If you&#8217;re looking to unlock the full potential of Karpenter and further Kubernetes tools, our team is here to help. <a href=\"https:\/\/cloudification.io\/contact\/\">Contact us<\/a> today to explore how we can assist you.<\/p><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"hf-elementor-layout elementor-element elementor-element-b8d2f15 elementor-widget elementor-widget-spacer\" data-id=\"b8d2f15\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>What makes this cluster autoscaler so great? Find out in this post!!<\/p>\n","protected":false},"author":3,"featured_media":6265,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_eb_attr":""},"categories":[35,38,33,34],"tags":[28],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/cloudification.io\/wp-json\/wp\/v2\/posts\/6262"}],"collection":[{"href":"https:\/\/cloudification.io\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cloudification.io\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cloudification.io\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/cloudification.io\/wp-json\/wp\/v2\/comments?post=6262"}],"version-history":[{"count":28,"href":"https:\/\/cloudification.io\/wp-json\/wp\/v2\/posts\/6262\/revisions"}],"predecessor-version":[{"id":8365,"href":"https:\/\/cloudification.io\/wp-json\/wp\/v2\/posts\/6262\/revisions\/8365"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cloudification.io\/wp-json\/wp\/v2\/media\/6265"}],"wp:attachment":[{"href":"https:\/\/cloudification.io\/wp-json\/wp\/v2\/media?parent=6262"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cloudification.io\/wp-json\/wp\/v2\/categories?post=6262"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cloudification.io\/wp-json\/wp\/v2\/tags?post=6262"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}