Upgrade VAST CSI Driver

Steps to Upgrade VAST CSI Driver

Choose your upgrade path:

To upgrade from 2.6.3 or later to 2.7.x:
- Follow the procedure for upgrading a Helm-based deployment.
To upgrade from 2.3.x, 2.4.x, 2.5.x, 2.6.1, 2.6.2 to 2.7.x:
1. Delete all storage classes created via Helm in versions prior to 2.6.3 and recreate them via Helm so that the driver applies the secretName and secretNamespace settings to them (introduced in 2.6.3).
2. Follow the procedure for upgrading a Helm-based deployment.

Containers referencing VAST CSI Driver will run with the new version of VAST CSI Driver the next time they are created.

Use the following procedure if both old and new release of VAST CSI Driver are deployed using a Helm chart.

Refresh Helm repository information to see which VAST CSI Driver versions are available for deployment:
```
helm repo update
```
Update the VAST CSI Driver's Helm chart configuration file (values.yaml) to specify the target release of VAST CSI Driver:
```
image:
  csiVastPlugin:
    repository: <repo>
    tag: <new release>
    imagePullPolicy: IfNotPresent
```
- <repo> is the name of the VAST CSI Driver Helm repository.
- <new release> is the VAST CSI Driver release to be upgraded to.
For example:
```
image:
  csiVastPlugin:
    repository: vastdataorg/csi
    tag: v2.7.0
    imagePullPolicy: IfNotPresent
```
Run Helm upgrade:
```
helm upgrade <old release> <repo>/vastcsi -f <filename>.yaml
```
Where:
- <old release> is the VAST CSI Driver release to be upgraded from.
- <repo> is the name of the VAST CSI Driver Helm repository.
- vastcsi is the name of the VAST CSI Driver Helm chart.
- <filename>.yaml is the Helm chart configuration file.
For example:
```
helm upgrade csi-driver vastcsi/vastcsi -f values.yaml
```
Verify the status of the new VAST CSI Driver chart release:
```
helm ls
```