Add GCS to helm chart (#1428)

* Add GCS to helm chart

* base64 encode serviceAccount in the chart

* Standardize GCP Service Account references

* pipe storage.gcp.serviceAccount to quote

charts/athens-proxy/templates/deployment.yaml

@@ -95,6 +95,15 @@ spec:
         - name: AWS_SESSION_TOKEN
           value: {{ .Values.storage.s3.session_token | quote }}
         {{- end }}
+        {{- else if eq .Values.storage.type "gcp"}}
+        - name: GOOGLE_CLOUD_PROJECT
+          value: {{ .Values.storage.gcp.projectID | quote }}
+        - name: ATHENS_STORAGE_GCP_BUCKET
+          value: {{ .Values.storage.gcp.bucket | quote }}
+        {{- if .Values.storage.gcp.serviceAccount }}
+        - name: ATHENS_STORAGE_GCP_SERVICE_ACCOUNT
+          value: {{ .Values.storage.gcp.serviceAccount | b64enc | quote }}
+        {{- end }}
         {{- else if eq .Values.storage.type "minio" }}
         {{- if .Values.storage.minio.endpoint }}
         - name: ATHENS_MINIO_ENDPOINT

charts/athens-proxy/values.yaml

@@ -64,6 +64,16 @@ storage:
     accessKey: ""
     secretKey: ""
     bucket: ""
+  gcp:
+  # For more information, see:
+  # https://docs.gomods.io/install/install-on-kubernetes/#google-cloud-storage
+    # you must set gcp projectID and bucket when running 'helm install'
+    projectID: ""
+    bucket: ""
+    # set serviceAccount to a key which has read/write access to the GCS bucket.
+    # If you are running Athens inside GCP, you will most likely not need this
+    # as GCP figures out internal authentication between products for you.
+    serviceAccount: ""
 
 # Extra environment variables to be passed
 # You can add any new ones at the bottom