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Azure Kubernetes Service (AKS) makes it simple to deploy a managed Kubernetes cluster in Azure. AKS reduces the complexity and operational overhead of managing Kubernetes by offloading much of that responsibility to Azure. As a hosted Kubernetes service, Azure handles critical tasks like health monitoring and maintenance for you. In addition, the service is free, you only pay for the agent nodes within your clusters, not for the masters.
From here I will do a step-by-step Upgrade of a Microsoft Azure Kubernetes Cluster to a newer version and set Azure Monitor alert rule active for the future to get an Alert notification when a colleague is upgrading the AKS Services.
Here you see all the newer versions of Kubernetes.
Upgrading to version 1.11.1 of Kubernetes.
IMPORTANT NOTE :
When upgrading an AKS cluster, Kubernetes minor versions cannot be skipped. For example, upgrades between 1.8.x -> 1.9.x or 1.9.x -> 1.10.x are allowed, however 1.8 -> 1.10 is not. To upgrade, from 1.8 -> 1.10, you need to upgrade first from 1.8 -> 1.9 and then another do another upgrade from 1.9 -> 1.10
KubeCluster Activity Log
At the green arrow on this picture you can download the activities into CSV file. At the Red arrow you see the User ID who initiated the Upgrade of the Kubernetes Cluster. This is important information for Azure Alert monitoring.
10 minutes later Kubernetes Cluster is Upgraded to version 1.11.1
Upgrade is done.
We now do a minor Upgrade of Kubernetes from version 1.11.1 to 1.11.2 to get the newest version on Azure.
Click on 1.11.2 version and hit Save.
Microsoft Azure Monitoring Alerts
When you click on the second activity of the Upgrade you see at arrow 2 that you can add an Activity Log Alert by Azure monitoring.
Creating Rule Alerts.
Define Alert condition is already set. We want an Alert notification on Upgrading KubeCluster.
Define Alert details, must be set.
Define Action Group, must be set to create the Alert Rule.
2. Define the Alert Details.
3. Define Action Group : Click on + New Action Group
Click on OK
Created Action Group name AKSAdmins
An action group is a collection of notification preferences defined by the user. Azure Monitor and Service Health alerts are configured to use a specific action group when the alert is triggered. Various alerts may use the same action group or different action groups depending on the user’s requirements.
From here you can Create the Alert Rule and make it Active.
Azure Monitor Alerts with one rule Enabled.
Here is our Active KubeCluster Alert Rule.
Now we will get a notification when a Colleague is Upgrading our KubeCluster in the Future 😉
KubeCluster is now running the latest available version of Kubernetes.
Kubernetes Cluster nodes are Healthy and running version 1.11.2
Here you see in the Kubernetes Dashboard the Node version of Kubernetes.
For Developers and DevOps it’s Great to work with Microsoft Visual Studio Code and the Azure Kubernetes Services (AKS) to work in a CI/CD Pipeline, to create continuous business applications in the Cloud.
Here is my Azure KubeCluster running in Visual Studio Code 🙂
And at last, most important thing is that my Application is running on my Azure Kubernetes Cluster for the Business My Test Site.
Hope this blogpost is useful for you and your business to manage your AKS Cluster in the Microsoft Cloud.
More information About Azure Kubernetes Service (AKS) :
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Azure Kubernetes Service (AKS) makes it simple to deploy a managed Kubernetes cluster in Azure. AKS reduces the complexity and operational overhead of managing Kubernetes by offloading much of that responsibility to Azure. As a hosted Kubernetes service, Azure handles critical tasks like health monitoring and maintenance for you. In addition, the service is free, you only pay for the agent nodes within your clusters, not for the masters.
When you have a Web App like Joomla CMS running on Microsoft Azure Kubernetes Services (AKS) and you need more capacity or performance, you can really easy Scale-Up and Scale-Down when needed. It is easy to scale an AKS cluster to a different number of nodes. Select the desired number of nodes and run the az aks scale command. When scaling down, nodes will be carefully cordoned and drained to minimize disruption to running applications. When scaling up, the az command waits until nodes are marked Ready by the Kubernetes cluster.
Scaling your Azure Kubernetes Cluster (AKS)
In the following step-by-step guide I’m scaling my AKS Cluster from 2 nodes to 4 node Kubernetes Cluster :
Here you can scale your Cluster to the right Size Click on Save to execute.
One AKS Cluster can Scale-Up to 100 vCPU’s and 350 GB of Memory 😉
It’s updating now my 2 Node AKS Cluster to 4 Nodes.
( wait a couple of minutes )
When you open the Kubernetes Dashboard you see the load on the 4 Nodes.
When you don’t need a 4 Node Cluster performance and/or capacity any more because of the workload, you can scale your Cluster back to 2 Node Cluster for example.
Scaling down to 2 Node AKS Cluster.
Back to 2 Node Azure Kubernetes Cluster.
Just Refresh in Visual Studio Code
2 Node Cluster Again.
And my Joomla CMS Web App is running on 2 Node AKS Cluster.
This was Scaling your Microsoft Azure Kubernetes Cluster (AKS), the Next step-by-step guide I’m Upgrading my Azure Kubernetes Cluster (AKS) to a New version.
Upgrading your Azure Kubernetes Cluster (AKS)
My Current version of AKS is 1.10.5
I’m Upgrading to Kubernetes version 1.10.6
Click on Save to Execute.
After +/- 10 minutes my AKS Cluster was Up-to-Date.
with kubectl version you see the Changes in Visual Studio Code (VSC)
And of course you get notified by the Azure Portal when your Upgrade is Done 🙂
When you have your Microsoft Azure Kubernetes Cluster (AKS) createdand running in the Cloud you want to run some pods (Containers) for your Business Solution. In the Next steps I created a Joomla CMS Web App on my Kubernetes Cluster in Microsoft Azure by playing with some tooling.
First I installed Chocolateyvia Powershell in the Administrator modus :
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Azure Kubernetes Service (AKS) makes it simple to deploy a managed Kubernetes cluster in Azure. AKS reduces the complexity and operational overhead of managing Kubernetes by offloading much of that responsibility to Azure. As a hosted Kubernetes service, Azure handles critical tasks like health monitoring and maintenance for you. In addition, the service is free, you only pay for the agent nodes within your clusters, not for the masters.
Here you see the steps from the Azure Portal to Create your Azure Kubernetes Cluster :
Fill in the Basics and Click on Authentication tab
Here you have your SPN and you can manage RBAC.
go to Networking TAB.
Network Settings, keep http application routing on yes.
Click on Monitoring TAB.
Azure Monitoring settings.
Review + Create will Validate your Configuration.
Click on Create.
It’s Deploying the Azure Kubernetes Cluster.
Here you find the Overview of your AKS Cluster in the Azure Portal.
Your Microsoft Azure Kubernetes Cluster is now running by Default with Azure monitoring enabled, and I like to have it in Microsoft Visual Studio Code.
