[FEATURE]: Allow to install 2 PowerFlex on a stretched cluster using the CSM Operator or the Helm chart

[coulof]

Describe the solution you'd like
We have the following architecture

We need to be able to install the CSI driver using the CSM Operator or the Helm chart.

Describe alternatives you've considered
A non-tested workaround is to start from the helm chart and tweak it like this:

1. make sure the controller Pods can talk to the PowerFlex appliances on the two sites
2. in the values.yaml the nodeAffinity for the node to go onto the Datacenter A : https://github.com/dell/helm-charts/blob/main/charts/csi-vxflexos/values.yaml#L215
3. generate the yaml helm install --dry-run...
4. using kustomize or manually :

• Duplicate the DaemonSet section : https://github.com/dell/helm-charts/blob/main/charts/csi-vxflexos/templates/node.yaml#L61
• Rename them to identify DC-A vs DC-B
• In the initContainers section replace the MDM secret reference by the value of the relevant MDM_IP
• For the DC-B DaemonSet update the nodeSelector to go on according nodes : https://github.com/dell/helm-charts/blob/main/charts/csi-vxflexos/templates/node.yaml#L86
• run the helm install... 🤞

Additional context
This is a customer request please consider adding it to the roadmap

[csmbot]

@coulof: Thank you for submitting this issue!

The issue is currently awaiting triage. Please make sure you have given us as much context as possible.

If the maintainers determine this is a relevant issue, they will remove the needs-triage label and respond appropriately.

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[coulof]

The support matrix indicated the multi-array is supported : https://dell.github.io/csm-docs/docs/csidriver/#csi-driver-capabilities albeit it doesn't work in case of non equal access from the nodes to the backend storage.

Therefore changing the type to bug.

[tdawe]

Our multi-array support will connect to all storage arrays listed in the Secret. There isn't an option to deploy multiple DaemonSets selectively across the nodes in the cluster. Spoke with @sharmilarama and will convert this to a Feature. cc: @anandrajak1