azuredisk CSI driver for Kubernetes

WARNING: This driver is in ALPHA currently. Do NOT use this driver in a production environment in its current state.

About

This driver allows Kubernetes to use azure disk volume, csi plugin name: disk.csi.azure.com

Project Status

Status: Alpha

Container Images & CSI Compatibility:

Azure Disk CSI Driver Version	Image	v0.3.0	v1.0.0
v0.1.0-alpha	mcr.microsoft.com/k8s/csi/azuredisk-csi:v0.1.0-alpha	yes	no
v0.2.0-alpha	mcr.microsoft.com/k8s/csi/azuredisk-csi:v0.2.0-alpha	no	yes
master branch	mcr.microsoft.com/k8s/csi/azuredisk-csi:latest	no	yes

Kubernetes Compatibility

Azure Disk CSI Driver\Kubernetes Version	1.12	1.13+
v0.1.0-alpha	yes	yes
v0.2.0-alpha	no	yes
master branch	no	yes

Driver parameters

Please refer to disk.csi.azure.com driver parameters

storage class disk.csi.azure.com parameters are compatible with built-in azuredisk plugin

Prerequisite

• The driver initialization depends on a Cloud provider config file, usually it's /etc/kubernetes/azure.json on all k8s nodes deployed by AKS or aks-engine, here is an azure.json example

Install azuredisk CSI driver on a Kubernetes cluster

Please refer to install azuredisk csi driver

E2E Usage example

1. create a pod with csi azuredisk driver mount on linux

Option#1: Azuredisk Dynamic Provisioning

• Create an azuredisk CSI storage class

kubectl create -f https://raw.githubusercontent.com/kubernetes-sigs/azuredisk-csi-driver/master/deploy/example/storageclass-azuredisk-csi.yaml

• Create an azuredisk CSI PVC

kubectl create -f https://raw.githubusercontent.com/kubernetes-sigs/azuredisk-csi-driver/master/deploy/example/pvc-azuredisk-csi.yaml

Option#2: Azuredisk Static Provisioning(use an existing azure disk)

• Create an azuredisk CSI PV, download pv-azuredisk-csi.yaml file and edit diskName, diskURI in volumeAttributes

wget https://raw.githubusercontent.com/kubernetes-sigs/azuredisk-csi-driver/master/deploy/example/pv-azuredisk-csi.yaml
vi pv-azuredisk-csi.yaml
kubectl create -f pv-azuredisk-csi.yaml

• Create an azuredisk CSI PVC which would be bound to the above PV

kubectl create -f https://raw.githubusercontent.com/kubernetes-sigs/azuredisk-csi-driver/master/deploy/example/pvc-azuredisk-csi-static.yaml

2. validate PVC status and create an nginx pod

• make sure pvc is created and in Bound status finally

watch kubectl describe pvc pvc-azuredisk

• create a pod with azuredisk CSI PVC

kubectl create -f https://raw.githubusercontent.com/kubernetes-sigs/azuredisk-csi-driver/master/deploy/example/nginx-pod-azuredisk.yaml

3. enter the pod container to do validation

• watch the status of pod until its Status changed from Pending to Running and then enter the pod container

$ watch kubectl describe po nginx-azuredisk
$ kubectl exec -it nginx-azuredisk -- bash
Filesystem      Size  Used Avail Use% Mounted on
overlay          30G   15G   15G  52% /
...
/devhost/sdc        9.8G   37M  9.8G   1% /mnt/azuredisk
...

In the above example, there is a /mnt/azuredisk directory mounted as disk filesystem.

Kubernetes Development

Please refer to development guide

Links

• Kubernetes CSI Documentation
• Analysis of the CSI Spec
• CSI Drivers
• Container Storage Interface (CSI) Specification