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An Azure Kubernetes Service (AKS) cluster needs to be periodically updated to ensure security and compatibility with the latest features. There are two components of an AKS cluster that are necessary to maintain:
For Linux nodes, node image security patches and hotfixes may be performed without your initiation as unattended updates. These updates are automatically applied, but AKS doesn't automatically reboot your Linux nodes to complete the update process. You're required to use a tool like kured or node image upgrade to reboot the nodes and complete the cycle.
The following table summarizes the details of updating each component:
Component name | Frequency of upgrade | Planned Maintenance supported | Supported operation methods | Documentation link |
---|---|---|---|---|
Cluster Kubernetes version (minor) upgrade | Roughly every three months | Yes | Automatic, Manual | Upgrade an AKS cluster |
Cluster Kubernetes version upgrade to supported patch version | Approximately weekly. To determine the latest applicable version in your region, see the AKS release tracker | Yes | Automatic, Manual | Upgrade an AKS cluster |
Node image version upgrade | Linux: weekly Windows: monthly |
Yes | Automatic, Manual | AKS node image upgrade |
Security patches and hot fixes for node images | As-necessary | AKS node security patches |
An important practice that you should include as part of your upgrade process is remembering to follow commonly used deployment and testing patterns. Testing an upgrade in a development or test environment before deployment in production is an important step to ensure application functionality and compatibility with the target environment. It can help you identify and fix any errors, bugs, or issues that might affect the performance, security, or usability of the application or underlying infrastructure.
Automatic upgrades can be performed through auto upgrade channels or via GitHub Actions.
Planned maintenance allows you to schedule weekly maintenance windows that will update your control plane and your kube-system pods, helping to minimize workload impact.
To find details and solutions to specific issues, view the following troubleshooting guides:
For more information what cluster operations may trigger specific upgrade events, upgrade best practices, and other considerations, see the AKS operator's guide on patching.
Обратна връзка за Azure Kubernetes Service
Azure Kubernetes Service е проект с отворен код. Изберете връзка, за да предоставите обратна връзка:
Събитие
Създаване на интелигентни приложения
17.03, 21 ч. - 21.03, 10 ч.
Присъединете се към поредицата срещи, за да изградите мащабируеми AI решения, базирани на реални случаи на употреба с колеги разработчици и експерти.
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Модул
Apply cluster upgrades and security patches with Azure Kubernetes Service - Training
Apply the latest version upgrades and patches to your Azure Kubernetes Service clusters.
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Microsoft Certified: Azure Administrator Associate - Certifications
Demonstrate key skills to configure, manage, secure, and administer key professional functions in Microsoft Azure.