Ash Tewari

aks

Kusto Queries on AKS Clusters

tewari

Kusto query language can be used to get insights into Azure Kubernetes Service (AKS) clusters. Container insights collects data from AKS clusters and forwards it to Log Analytics workspace, if enabled for a cluster. This data is available for querying in the Azure Monitor. Here is an example of how you can query the pods not in running state in specific namespaces.  The following query includes the name of the AKS cluster and renders the output as a stacked bar chart. You can include multiple AKS clusters in the scope in which this query is executed by clicking on [Select scope] hyperlink. Create an Azure Dashboard panel with this output by clicking on [Pin to dashboard] button. You can also […]

AKS – Adding SSH Keys to VMSS Nodes

tewari

You can connect to Azure Kubernetes Service (AKS) nodes using ssh. It is documented here: Connect with SSH to Azure Kubernetes Service (AKS) cluster nodes for maintenance or troubleshooting. I needed to access nodes on the System node pool for collecting some logs recently, but the process documented above was not working for me. It turns out that there were two different issues, both related to adding your SSH keys to the nodes in a virtual machine scale set (VMSS). This is the az cli command that adds the ssh keys to the VMSS: I was running this command from powershell on a windows host. So, the first modification I needed was to escape the double quotes by doubling them. […]

AKS Supported Kubernetes Versions

tewari

Azure Kubernetes Service (AKS) supports specific versions of Kubernetes.It is necessary to regularly monitor the release of new versions and upgrade your AKS clusters to supported versions in order to remain in compliance with AKS Kubernetes Version Support Policy. AKS announces the planned date of a new minor version release and corresponding old version deprecation via AKS Release notes at least 30 days prior to removal. An email notification is sent to the subscription administrators with the planned version removal dates. You get 30 days from version removal to upgrade to a supported minor version release. Patch versions can be released anytime and you get 30 days from the removal date to upgrade to a supported patch version. You should […]