If your Kubernetes Azure AKS cluster is old enough, especially in development environments, it will definitely run out of disk space, because AKS will store all container images (and in DEV environments they're changing quite often) on the disk.

I wasn't able to find, how often AKS engine is executing some clean operation (but it does, absolutely). However, in my case, space usage reached those already critical 80% and continued to grow. Here's how can run cleaning manually.

My customer require that we have supported versions of software installed, and I'm forced to upgrade Kubernetes as well according to the support policy of Kubernetes releases in Azure.

Last Kubernetes 1.24+ upgrade was not very clean - Nginx-ingress controller failed, and all our applications stopped responding.