Merge pull request #78662 from seanmck/aks-ri-faq

Clarifying Azure reservation discounting for AKS agent nodes

Author: PRMerger7

articles/aks/concepts-clusters-workloads.md

@@ -6,7 +6,7 @@ author: iainfoulds
 
 ms.service: container-service
 ms.topic: conceptual
-ms.date: 05/17/2019
+ms.date: 06/03/2019
 ms.author: iainfou
 ---
 
@@ -66,7 +66,7 @@ To run your applications and supporting services, you need a Kubernetes *node*.
 
 The Azure VM size for your nodes defines how many CPUs, how much memory, and the size and type of storage available (such as high-performance SSD or regular HDD). If you anticipate a need for applications that require large amounts of CPU and memory or high-performance storage, plan the node size accordingly. You can also scale up the number of nodes in your AKS cluster to meet demand.
 
-In AKS, the VM image for the nodes in your cluster is currently based on Ubuntu Linux or Windows Server 2019. When you create an AKS cluster or scale up the number of nodes, the Azure platform creates the requested number of VMs and configures them. There's no manual configuration for you to perform.
+In AKS, the VM image for the nodes in your cluster is currently based on Ubuntu Linux or Windows Server 2019. When you create an AKS cluster or scale up the number of nodes, the Azure platform creates the requested number of VMs and configures them. There's no manual configuration for you to perform. Agent nodes are billed as standard virtual machines, so any discounts you have on the VM size you're using (including [Azure reservations][reservation-discounts]) are automatically applied.
 
 If you need to use a different host OS, container runtime, or include custom packages, you can deploy your own Kubernetes cluster using [aks-engine][aks-engine]. The upstream `aks-engine` releases features and provides configuration options before they are officially supported in AKS clusters. For example, if you wish to use a container runtime other than Moby, you can use `aks-engine` to configure and deploy a Kubernetes cluster that meets your current needs.
 
@@ -266,3 +266,4 @@ This article covers some of the core Kubernetes components and how they apply to
 [operator-best-practices-scheduler]: operator-best-practices-scheduler.md
 [use-multiple-node-pools]: use-multiple-node-pools.md
 [operator-best-practices-advanced-scheduler]: operator-best-practices-advanced-scheduler.md
+[reservation-discounts]: ../billing/billing-save-compute-costs-reservations.md

articles/aks/faq.md

@@ -7,7 +7,7 @@ manager: jeconnoc
 
 ms.service: container-service
 ms.topic: article
-ms.date: 05/06/2019
+ms.date: 06/03/2019
 ms.author: iainfou
 ---
 
@@ -127,6 +127,10 @@ pods by using this formula: ((maxPods or (maxPods * vm_count)) > managed add-on
 
 Users can't override the minimum `maxPods` validation.
 
+## Can I apply Azure reservation discounts to my AKS agent nodes?
+
+AKS agent nodes are billed as standard Azure virtual machines, so if you've purchased [Azure reservations][reservation-discounts] for the VM size that you are using in AKS, those discounts are automatically applied.
+
 <!-- LINKS - internal -->
 
 [aks-regions]: ./quotas-skus-regions.md#region-availability
@@ -143,6 +147,7 @@ Users can't override the minimum `maxPods` validation.
 [nodepool-upgrade]: use-multiple-node-pools.md#upgrade-a-node-pool
 [aks-windows-cli]: windows-container-cli.md
 [aks-windows-limitations]: windows-node-limitations.md
+[reservation-discounts]: ../billing/billing-save-compute-costs-reservations.md
 
 <!-- LINKS - external -->