If you've any previous installation of Velero in the AKS cluster, you need to delete it before installing Backup Extension. Install Backup Extension on the AKS clusters following the required FQDN/application rules. Learn how to allow MCR access from the firewall. If you enable a firewall on the AKS cluster, the extension installation process might fail due to access issues on the Registry. The Backup Extension during installation fetches Container Images stored in Microsoft Container Registry (MCR). The support for User Identity based AKS clusters is currently not available. Only Managed System Identity based AKS clusters are supported by AKS backup. Learn more to register the resource provider. To enable Trusted Access between a Backup vault and an AKS cluster, you must register the TrustedAccessPreview feature flag on Microsoft.ContainerService at the subscription level. The Backup vault is assigned a pre-defined role Microsoft.DataProtection/backupVaults/backup-operator in the AKS cluster, allowing it to only perform specific backup operations. The managed identity must have the appropriate Kubernetes permissions assigned via an Azure resource role.įor AKS backup, the Backup vault accesses your AKS clusters via Trusted Access to configure backups and restores. Your Azure resources access AKS clusters through the AKS regional gateway using system-assigned managed identity authentication. ![]() The Trusted Access feature allows you to access AKS clusters with different configurations, which aren't limited to private clusters, clusters with local accounts disabled, Microsoft Entra ID clusters, and authorized IP range clusters. Without using Microsoft Entra application, this feature enables you to give explicit consent to your system-assigned identity of allowed resources to access your AKS clusters using an Azure resource RoleBinding. The AKS Trusted Access feature enables you to bypass the private endpoint restriction. Many Azure services depend on clusterAdmin kubeconfig and the publicly accessible kube-apiserver endpoint to access AKS clusters. Learn how to manage the operation to install Backup Extension using Azure CLI. Because they are core platform components, there is no workaround available to remove them once installed in the cluster. ![]() So, the COGS impact of these components is very low. The backup extension also relies on these for installation and upgrades.īoth of these core components are deployed with aggressive hard limits on CPU and memory, with CPU less than 0.5% of a core and memory limit ranging from 50-200 MB. These provide capabilities to deploy 1P and 3P extensions. Learn how to register the resource provider.Įxtension agent and extension operator are the core platform components in AKS, which are installed when an extension of any type is installed for the first time in an AKS cluster. You can also use the Azure CLI commands to manage the installation and other operations on the Backup Extension.īefore you install an extension in an AKS cluster, you must register the Microsoft.KubernetesConfiguration resource provider at the subscription level. You need to install Backup Extension on both the source cluster to be backed up and the target cluster where the restore will happen.īackup Extension can be installed in the cluster from the AKS portal blade on the Backup tab under Settings. ![]() To access this blob container, the Extension Identity requires Storage Account Contributor role on the storage account that has the container. During the extension installation, it also creates a User-assigned Managed Identity (Extension Identity) in the Node Pool resource group.īackup Extension uses a blob container (provided in input during installation) as a default location for backup storage. It's installed with cluster wide scope that allows the extension to access all the cluster resources. The extension enables backup and restore capabilities for the containerized workloads and persistent volumes used by the workloads running in AKS clusters.īackup Extension is installed in its own namespace dataprotection-microsoft by default. Based on the least privileged security model, a Backup vault must have Trusted Access enabled to communicate with the AKS cluster. ![]() Backup vault communicates with the cluster via this Backup Extension to perform backup and restore operations. This article describes the prerequisites for Azure Kubernetes Service (AKS) backup.Īzure Backup now allows you to back up AKS clusters (cluster resources and persistent volumes attached to the cluster) using a backup extension, which must be installed in the cluster.
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