Reconcile NGINX custom template

What does this MR do?

Reconcile NGINX custom template

Reconcile custom template introduced in gitlab-org/charts/gitlab!4523.

Changelog: added

Relates: gitlab-org/charts/gitlab#2262

Test Plan

1. Build an Operator image which has gitlab-org/charts/gitlab!4523

   FROM registry.gitlab.com/gitlab-org/cloud-native/gitlab-operator:cb-nginx-custom-tpl
   # Copy local build of https://gitlab.com/gitlab-org/charts/gitlab/-/merge_requests/4523
   COPY gitlab-9.3.2.tgz /charts/

2. Load the image into your cluster or a registry

3. Deploy the Operator

4. Create a GitLab CR, matching the chart version you used in step 1

   apiVersion: apps.gitlab.com/v1beta1
   kind: GitLab
   metadata:
     name: gitlab
   spec:
     chart:
       values:
         certmanager-issuer:
           email: <redac>
       version: 9.3.2

5. Confirm the ConfigMap is created by the Operator and NGINX in healthy.

   $ kubectl get cm -n gitlab-system | grep nginx-tpl
   gitlab-nginx-tpl                          1      15s

6. NGINX Ingress behavior with the custom template is tested in gitlab-org/charts/gitlab!4523

Checklist

See Definition of done.

For anything in this list which will not be completed, please provide a reason in the MR discussion.

Required

• Merge Request Title and Description are up to date, accurate, and descriptive
• MR targeting the appropriate branch
• MR has a green pipeline on GitLab.com
• When ready for review, MR is labeled "~workflow::ready for review" per the Distribution MR workflow

Expected (please provide an explanation if not completing)

• Test plan indicating conditions for success has been posted and passes
• Documentation created/updated
• Tests added
• Integration tests added to GitLab QA
• Equivalent MR/issue for omnibus-gitlab opened
• Validate potential values for new configuration settings. Formats such as integer 10, duration 10s, URI scheme://user:passwd@host:port may require quotation or other special handling when rendered in a template and written to a configuration file.

Related issues