Merge pull request tinkerbell#136 from jacobweinstock/nginx-annotations

Add nginx service annotations:

## Description

<!--- Please describe what this PR is going to change -->
Allows customization for things like load balancer.

## Why is this needed

<!--- Link to issue you have raised -->

Fixes: tinkerbell#62 

## How Has This Been Tested?
<!--- Please describe in detail how you tested your changes. -->
<!--- Include details of your testing environment, and the tests you ran to -->
<!--- see how your change affects other areas of the code, etc. -->


## How are existing users impacted? What migration steps/scripts do we need?

<!--- Fixes a bug, unblocks installation, removes a component of the stack etc -->
<!--- Requires a DB migration script, etc. -->


## Checklist:

I have:

- [ ] updated the documentation and/or roadmap (if required)
- [ ] added unit or e2e tests
- [ ] provided instructions on how to upgrade

tinkerbell/stack/templates/nginx.yaml

@@ -169,6 +169,10 @@ metadata:
     app: {{ .Values.stack.name }}
   name: {{ .Values.stack.name }}
   namespace: {{ .Release.Namespace | quote }}
+  annotations:
+    {{- with .Values.stack.service.annotations }}
+    {{- toYaml . | nindent 4 }}
+    {{- end }}
 spec:
   type: {{ .Values.stack.service.type }}
   {{- if eq .Values.stack.service.type "LoadBalancer" }}

tinkerbell/stack/values.yaml

@@ -4,6 +4,7 @@ stack:
   service:
     enabled: true
     type: LoadBalancer
+    annotations: {}
   selector:
     app: tink-stack
   nodeSelector: {}