GlusterFS: Allow for configuration of node selector

Signed-off-by: Jose A. Rivera <jarrpa@redhat.com>

roles/openshift_storage_glusterfs/files/v3.6/glusterfs-template.yml

@@ -28,8 +28,7 @@ objects:
         labels:
           glusterfs-node: pod
       spec:
-        nodeSelector:
-          storagenode: glusterfs
+        nodeSelector: "${{NODE_LABELS}}"
         hostNetwork: true
         containers:
         - name: glusterfs
@@ -120,6 +119,10 @@ objects:
         dnsPolicy: ClusterFirst
         securityContext: {}
 parameters:
+- name: NODE_LABELS
+  displayName: Daemonset Node Labels
+  description: Labels which define the daemonset node selector.
+  value: '{ "storagenode": "glusterfs" }'
 - name: IMAGE_NAME
   displayName: GlusterFS container name
   required: True

roles/openshift_storage_glusterfs/tasks/glusterfs_deploy.yml

@@ -89,6 +89,7 @@
     params:
       IMAGE_NAME: "{{ glusterfs_image }}"
       IMAGE_VERSION: "{{ glusterfs_version }}"
+      NODE_LABELS: "{{ glusterfs_nodeselector }}"
 
 - name: Wait for GlusterFS pods
   oc_obj: