chore(charts): add custom controller environment variables support

Author: duanhongyi

charts/controller/templates/controller-deployment.yaml

@@ -128,14 +128,16 @@ spec:
               secretKeyRef:
                 name: database-creds
                 key: password
-          - name: RESERVED_NAMES
-            value: "drycc, drycc-builder, drycc-monitor-grafana"
           - name: WORKFLOW_NAMESPACE
             valueFrom:
               fieldRef:
                 fieldPath: metadata.namespace
           - name: DRYCC_NSQD_ADDRS
             value: "{{range $i := until $nsqdNodeCount}}drycc-nsqd-{{$i}}.drycc-nsqd.{{ $.Release.Namespace }}.svc.cluster.local:{{$.Values.nsqd.tcp_port}}{{if lt (add 1 $i) $nsqdNodeCount}},{{end}}{{end}}"
+          {{- range $key, $value := .Values.environment }}
+          - name: {{ $key }}
+            value: {{ $value | quote }}
+          {{- end }}
           volumeMounts:
             - mountPath: /etc/slugrunner
               name: slugrunner-config

charts/controller/values.yaml

@@ -19,6 +19,12 @@ k8s_api_verify_tls: "true"
 # Set storageClassName, It is used for application mount.
 app_storage_class: ""
 
+# Any custom controller environment variables
+# can be specified as key-value pairs under environment
+# this is usually a non required setting.
+environment:
+  RESERVED_NAMES: "drycc, drycc-builder, drycc-monitor-grafana"
+
 nsqd:
   replicas: 1
   tcp_port: 4150