GlusterFS: Allow option to use or ignore default node selectors

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

roles/openshift_storage_glusterfs/README.md

@@ -76,10 +76,11 @@ GlusterFS cluster into a new or existing OpenShift cluster:
 | Name                                             | Default value           | Description                             |
 |--------------------------------------------------|-------------------------|-----------------------------------------|
 | openshift_storage_glusterfs_timeout              | 300                     | Seconds to wait for pods to become ready
-| openshift_storage_glusterfs_namespace            | 'glusterfs'             | Namespace in which to create GlusterFS resources
+| openshift_storage_glusterfs_namespace            | 'glusterfs'             | Namespace/project in which to create GlusterFS resources
 | openshift_storage_glusterfs_is_native            | True                    | GlusterFS should be containerized
 | openshift_storage_glusterfs_name                 | 'storage'               | A name to identify the GlusterFS cluster, which will be used in resource names
 | openshift_storage_glusterfs_nodeselector         | 'glusterfs=storage-host'| Selector to determine which nodes will host GlusterFS pods in native mode. **NOTE:** The label value is taken from the cluster name
+| openshift_storage_glusterfs_use_default_selector | False                   | Whether to use a default node selector for the GlusterFS namespace/project. If False, the namespace/project will have no restricting node selector. If True, uses pre-existing or default (e.g. osm_default_node_selector) node selectors. **NOTE:** If True, nodes which will host GlusterFS pods must already have the additional labels.
 | openshift_storage_glusterfs_storageclass         | True                    | Automatically create a StorageClass for each GlusterFS cluster
 | openshift_storage_glusterfs_image                | 'gluster/gluster-centos'| Container image to use for GlusterFS pods, enterprise default is 'rhgs3/rhgs-server-rhel7'
 | openshift_storage_glusterfs_version              | 'latest'                | Container image version to use for GlusterFS pods

roles/openshift_storage_glusterfs/defaults/main.yml

@@ -3,6 +3,7 @@ openshift_storage_glusterfs_timeout: 300
 openshift_storage_glusterfs_is_native: True
 openshift_storage_glusterfs_name: 'storage'
 openshift_storage_glusterfs_nodeselector: "glusterfs={{ openshift_storage_glusterfs_name }}-host"
+openshift_storage_glusterfs_use_default_selector: False
 openshift_storage_glusterfs_storageclass: True
 openshift_storage_glusterfs_image: "{{ 'rhgs3/rhgs-server-rhel7' | quote if deployment_type == 'openshift-enterprise' else 'gluster/gluster-centos' | quote }}"
 openshift_storage_glusterfs_version: 'latest'
@@ -31,6 +32,7 @@ openshift_storage_glusterfs_registry_namespace: "{{ openshift.hosted.registry.na
 openshift_storage_glusterfs_registry_is_native: "{{ openshift_storage_glusterfs_is_native }}"
 openshift_storage_glusterfs_registry_name: 'registry'
 openshift_storage_glusterfs_registry_nodeselector: "glusterfs={{ openshift_storage_glusterfs_registry_name }}-host"
+openshift_storage_glusterfs_registry_use_default_selector: "{{ openshift_storage_glusterfs_use_default_selector }}"
 openshift_storage_glusterfs_registry_storageclass: False
 openshift_storage_glusterfs_registry_image: "{{ openshift_storage_glusterfs_image }}"
 openshift_storage_glusterfs_registry_version: "{{ openshift_storage_glusterfs_version }}"

roles/openshift_storage_glusterfs/tasks/glusterfs_common.yml

@@ -15,6 +15,7 @@
   oc_project:
     state: present
     name: "{{ glusterfs_namespace }}"
+    node_selector: "{% if glusterfs_use_default_selector %}{{ omit }}{% endif %}"
   when: glusterfs_is_native or glusterfs_heketi_is_native or glusterfs_storageclass
 
 - name: Delete pre-existing heketi resources

roles/openshift_storage_glusterfs/tasks/glusterfs_config.yml

@@ -5,6 +5,7 @@
     glusterfs_is_native: "{{ openshift_storage_glusterfs_is_native | bool }}"
     glusterfs_name: "{{ openshift_storage_glusterfs_name }}"
     glusterfs_nodeselector: "{{ openshift_storage_glusterfs_nodeselector | default(['storagenode', openshift_storage_glusterfs_name] | join('=')) | map_from_pairs }}"
+    glusterfs_use_default_selector: "{{ openshift_storage_glusterfs_use_default_selector }}"
     glusterfs_storageclass: "{{ openshift_storage_glusterfs_storageclass }}"
     glusterfs_image: "{{ openshift_storage_glusterfs_image }}"
     glusterfs_version: "{{ openshift_storage_glusterfs_version }}"

roles/openshift_storage_glusterfs/tasks/glusterfs_registry.yml

@@ -5,6 +5,7 @@
     glusterfs_is_native: "{{ openshift_storage_glusterfs_registry_is_native | bool }}"
     glusterfs_name: "{{ openshift_storage_glusterfs_registry_name }}"
     glusterfs_nodeselector: "{{ openshift_storage_glusterfs_registry_nodeselector | default(['storagenode', openshift_storage_glusterfs_registry_name] | join('=')) | map_from_pairs }}"
+    glusterfs_use_default_selector: "{{ openshift_storage_glusterfs_registry_use_default_selector }}"
     glusterfs_storageclass: "{{ openshift_storage_glusterfs_registry_storageclass }}"
     glusterfs_image: "{{ openshift_storage_glusterfs_registry_image }}"
     glusterfs_version: "{{ openshift_storage_glusterfs_registry_version }}"