chart: allow setting deployment resource requests/limits (#1246)

* chart: allow setting deployment resource requests/limits

Signed-off-by: Geoff Baskwill <me@geoffbaskwill.ca>

* docs: add resources section to Helm chart docs

Signed-off-by: Geoff Baskwill <me@geoffbaskwill.ca>

* chart: bump chart version

Signed-off-by: Geoff Baskwill <me@geoffbaskwill.ca>

charts/athens-proxy/Chart.yaml

@@ -1,5 +1,5 @@
 name: athens-proxy
-version: 0.2.13
+version: 0.2.14
 appVersion: 0.4.0
 description: The proxy server for Go modules
 icon: https://raw.githubusercontent.com/gomods/athens/master/docs/static/banner.png

charts/athens-proxy/templates/deployment.yaml

@@ -170,6 +170,10 @@ spec:
         - name: ssh-keys
           mountPath: /ssh-keys
         {{- end }}
+      {{- with .Values.resources }}
+        resources:
+{{ toYaml . | indent 10 }}
+      {{- end }}
       volumes:
       - name: storage-volume
       {{- if .Values.storage.disk.persistence.enabled }}

charts/athens-proxy/values.yaml

@@ -114,3 +114,11 @@ nodeSelector: {}
 tolerations: []
 
 affinity: {}
+
+resources: {}
+#  limits:
+#    cpu: 100m
+#    memory: 64Mi
+#  requests:
+#    cpu: 100m
+#    memory: 64Mi

docs/content/install/install-on-kubernetes.md

@@ -104,6 +104,20 @@ By default, the chart will install Athens with a replica count of 1. To change t
 helm install gomods/athens-proxy -n athens --namespace athens --set replicaCount=3
 ```
 
+### Resources
+
+By default, the chart will install Athens without specific resource requests or limits. To change this, change the `resources` value:
+
+```console
+helm install gomods/athens-proxy -n athens --namespace athens \
+  --set resources.requests.cpu=100m \
+  --set resources.requests.memory=64Mi \
+  --set resources.limits.cpu=100m \
+  --set resources.limits.memory=64Mi
+```
+
+For more information, see [Managing Compute Resources for Containers](https://kubernetes.io/docs/concepts/configuration/manage-compute-resources-container/) in the Kubernetes documentation.
+
 ### Give Athens access to private repositories via Github Token (Optional)
 
 1. Create a token at https://github.com/settings/tokens