Mariner-Ubuntu parity in AKS docs

Author: schaffererin

articles/aks/concepts-security.md

@@ -42,8 +42,8 @@ You can control access to the API server using Kubernetes role-based access cont
 
 ## Node security
 
-AKS nodes are Azure virtual machines (VMs) that you manage and maintain. 
-* Linux nodes run an optimized Ubuntu distribution using the `containerd` or Docker container runtime. 
+AKS nodes are Azure virtual machines (VMs) that you manage and maintain.
+* Linux nodes run optimized versions of Ubuntu or CBL-Mariner.
 * Windows Server nodes run an optimized Windows Server 2019 release using the `containerd` or Docker container runtime.
 
 When an AKS cluster is created or scaled up, the nodes are automatically deployed with the latest OS security updates and configurations.

articles/aks/howto-deploy-java-liberty-app.md

@@ -31,7 +31,7 @@ This article uses the Azure Marketplace offer for Open/WebSphere Liberty to acce
 
 * This article requires at least version 2.31.0 of Azure CLI. If using Azure Cloud Shell, the latest version is already installed.
 * If running the commands in this guide locally (instead of Azure Cloud Shell):
-  * Prepare a local machine with Unix-like operating system installed (for example, Ubuntu, macOS, Windows Subsystem for Linux).
+  * Prepare a local machine with Unix-like operating system installed (for example, Ubuntu, CBL-Mariner, macOS, Windows Subsystem for Linux).
   * Install a Java SE implementation (for example, [Eclipse Open J9](https://www.eclipse.org/openj9/)).
   * Install [Maven](https://maven.apache.org/download.cgi) 3.5.0 or higher.
   * Install [Docker](https://docs.docker.com/get-docker/) for your OS.

articles/aks/node-updates-kured.md

@@ -27,7 +27,7 @@ You need the Azure CLI version 2.0.59 or later installed and configured. Run `az
 
 ## Understand the AKS node update experience
 
-In an AKS cluster, your Kubernetes nodes run as Azure virtual machines (VMs). These Linux-based VMs use an Ubuntu image, with the OS configured to automatically check for updates every day. If security or kernel updates are available, they are automatically downloaded and installed.
+In an AKS cluster, your Kubernetes nodes run as Azure virtual machines (VMs). These Linux-based VMs use an Ubuntu or CBL-Mariner image, with the OS configured to automatically check for updates every day. If security or kernel updates are available, they are automatically downloaded and installed.
 
 ![AKS node update and reboot process with kured](media/node-updates-kured/node-reboot-process.png)