Support extra environment variables in the Chart (e.g. for HTTP Proxy)

[outscale-age]

Is your feature request related to a problem? Please describe.

I would like to use osc-bsu-csi-driver behind an HTTP proxy. A possible way to do this is to pass environment variables like https_proxy to the BSU CSI Driver containers. However, this is not supported today, and forces me to work around by patching the Chart.

Describe the solution you'd like in detail

Two enhancements could be done:

• A generic way of overriding environment variables on the BSU CSI Driver (see extraEnv suggestion below).
• Documenting the required environment variables to run the BSU CSI Driver behind a Proxy (https_proxy, no_proxy).

Additional context

Helm charts typically have knobs like extraEnv in the values.yaml to set static extra environment variables in the Deployments, StatefulSets, etc.

Some variables could contain secrets, and therefore often an extraSecretEnv is also offered, which manages a dedicated secret and its presentation.

Example overrides in a chart: https://github.com/hashicorp/vault-helm/blob/main/values.yaml#L511

[ghost]

@outscale-age
HTTP Proxy is now included in osc-bsu-csi charts