feat(charts): add resource requests to chart

This change allows router resource requests to be specified in addition
to the existing limits templates, allowing for easy use with
a horizontal pod autoscaler.

Author: bookshelfdave

charts/router/templates/router-deployment.yaml

@@ -32,16 +32,28 @@ spec:
       - name: deis-router
         image: quay.io/{{.Values.org}}/router:{{.Values.docker_tag}}
         imagePullPolicy: {{.Values.pull_policy}}
-{{- if or (.Values.limits_cpu) (.Values.limits_memory)}}
+{{- if or (.Values.limits_cpu) (.Values.limits_memory) (.Values.requests_cpu) (.Values.requests_memory)}}
         resources:
+{{- if or (.Values.limits_cpu) (.Values.limits_memory)}}
           limits:
 {{- if (.Values.limits_cpu) }}
             cpu: {{.Values.limits_cpu}}
 {{- end}}
 {{- if (.Values.limits_memory) }}
             memory: {{.Values.limits_memory}}
 {{- end}}
+{{- end}} {{/* end limits section */}}
+{{- if or (.Values.requests_cpu) (.Values.requests_memory)}}
+          requests:
+{{- if (.Values.requests_cpu) }}
+            cpu: {{.Values.requests_cpu}}
+{{- end}}
+{{- if (.Values.requests_memory) }}
+            memory: {{.Values.requests_memory}}
 {{- end}}
+{{- end}} {{/* end requests section */}}
+{{- end}} {{/* end resources section */}}
+
         env:
         - name: POD_NAMESPACE
           valueFrom:

charts/router/values.yaml

@@ -5,6 +5,8 @@ platform_domain: ""
 dhparam: ""
 # limits_cpu: "100m"
 # limits_memory: "50Mi"
+# requests_cpu: "100m"
+# requests_memory: "50Mi"
 
 # Any custom router annotations(https://github.com/deis/router#annotations)
 # which need to be applied can be specified as key-value pairs under "deployment_annotations"