This is part 3 of a multi-part series explaining "everything you need to know about node pools in Azure Kubernetes Services AKS" in plain english using animations. For part 1 click here https://youtu.be/aGT3UtZoiA0 and part 2 please click here - https://youtu.be/45UxnRj11_g
In this video we will talk about:
- The different patching and upgrade options for nodepool - Kubernetes Version upgrade and NodeImage upgrade
- The upgrade process using cordon and drain methodology
- Auto upgrade channels and options for AKS
Commands from the video
Command to list the kubernetes version and the available kubernetes version upgrades on control plane
az aks get-upgrades \
--resource-group ResourceGroupName --name AKSClusterName --output table
Command to list the kubernetes version for all the nodes in your nodepools
az aks nodepool list \
--resource-group ResourceGroupName --cluster-name AKSClusterName \
--query "[].{Name:name,k8version:orchestratorVersion}" --output table
Upgrade kubernetes version on all nodes at once
In order to upgrade all nodes at once - we run the following command, this will upgrade all control plane and worker nodes at once to the desired kubernetes version
az aks upgrade \
--resource-group ResourceGroupName --name AKSClusterName \
--no-wait \
--kubernetes-version KubernetesVersion
Upgrade kubernetes version on control plane alone
If we only want to upgrade the kubernetes version for control plane alone - we run the same command but with the --control-plane-only switch
az aks upgrade \
--resource-group ResourceGroupName --name AKSClusterName \
--control-plane-only --no-wait \
--kubernetes-version KubernetesVersion
Upgrade Kubernetes version on specific node pools
If we need to upgrade the kubernetes version on only specific node pools we can run the following command by specifiying the nodepoolname and the kubernetes version
az aks nodepool upgrade \
--resource-group ResourceGroupName --cluster-name AKSClusterName --name NodePoolName \
--no-wait --kubernetes-version KubernetesVersion
Nodepool image upgrade
Running the following command lists all the current nodeimage versions of the nodepool
az aks nodepool list \
--resource-group ResourceGroupName --cluster-name AKSClusterName \
--query "[].{Name:name,NodeImageVersion:nodeImageVersion}" --output table
the following command to list the available latest nodeimage version for us
az aks nodepool get-upgrades \
--resource-group ResourceGroupName --cluster-name AKSClusterName \
--nodepool-name NodePoolName --output table
Upgrade nodeimage version for specific nodepool
In order to upgrade the nodeimage vefsion for a specific nodepool we run the following command :
az aks nodepool upgrade \
--resource-group myResourceGroup \
--cluster-name myAKSCluster \
--name mynodepool \
--node-image-only
az aks nodepool show \
--resource-group myResourceGroup \
--cluster-name myAKSCluster \
--name mynodepool
Upgrade nodeimage version for all nodepools at once
az aks upgrade \
--resource-group myResourceGroup \
--name myAKSCluster \
--node-image-only
Remember If you don’t run the nodeimage switch remember the whole cluster including the kubernetes version of the control plane is also upgraded.
az aks show \
--resource-group myResourceGroup \
--name myAKSCluster
azure #aks #nodepools #kubernetes #upgrade #cordon #drain #explained #plainenglish
For more simplified video tutorials on Azure and Kubernetes - check out www.azuremonk.com/video
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