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XenitAB
Set KubeletDiskType to Temporary to be able to use all disks on azure vm:s
Azure got a preview feature of being able to set the kubelet disk type to temporary. This configures the kubelet to use the temporary disk that is available on all azure vm:s. This disk is bigger in general compared to many OS disk or ephemeral disks that is included in azure vm:s.
For example we can see that a Standard_D4a_v4 https://docs.microsoft.com/en-us/azure/virtual-machines/dav4-dasv4-series#dav4-series got 100 GiB of SSD temp storage.
It would be great to store all logs and container images on this disk.
https://github.com/Azure/azure-rest-api-specs/blob/5582a35deb1bfa4aa22bac8f1d51b7934ead94ac/specification/containerservice/resource-manager/Microsoft.ContainerService/stable/2021-02-01/managedClusters.json#L3846-L3857
Sadly terraform currently don't support kubelet_disk_type
We should do some research and see for how long this feature have been in preview and depending on that it might be worth to try to implement it in the azurerm provider.
Upstream issue created: https://github.com/hashicorp/terraform-provider-azurerm/issues/15449
The PR is now merged and the feature was released in 2.97 :). I will start to look in to this during next week.
https://github.com/Azure/AKS/releases/tag/2022-04-03
Custom node config for AKS is now generally available.
https://docs.microsoft.com/azure/aks/custom-node-configuration