Helm chart: SecurityContext configurable

[Gianluca755]

• Tests written and linted ℹ︎
• Documentation written ℹ︎
• Commit history is tidy ℹ︎

The above links are broken!

What this does

Resolve #1518.

[jonnyowenpowell]

Thanks for the contribution!

We would like to retain compatibility with the current securityContext.fsGroup value. As such, could I ask that the PR be updated to use and give precedence to that value, when it is set, as follows:

{{- with .Values.podSecurityContext }}
securityContext:
{{- $fsGroupOverride := dict }}
{{- if hasKey $.Values.securityContext "fsGroup" }}
{{- $fsGroupOverride = dict "fsGroup" (int $.Values.securityContext.fsGroup) }}
{{- end }}
{{- merge $fsGroupOverride . | toYaml | nindent 8 }}
{{- else }}
{{- if .Values.securityContext.fsGroup }}
securityContext:
  fsGroup: {{ int .Values.securityContext.fsGroup }}
{{- end }}
{{- end }}

[Gianluca755]

@jonnyowenpowell like this?

[jonnyowenpowell]

LGTM 👍

[jonnyowenpowell]

I've cherry-picked and raised this separately in the PR linked above to avoid back-and-forth on non-functional issues like targeting the staging branch and having commit messages pass linting.

Thanks very much for the contribution 🙏

I'll update here when it's deployed.

[jonnyowenpowell]

This has been deployed with this release: #1525.