Label all nodes for fluentd

Need to come back to this and figure out the right thing to do here. I think we
should make the node selector flag for fluentd immutable and then have the user
specify a selector with which to apply the label.

roles/openshift_hosted_logging/README.md

@@ -17,7 +17,8 @@
 - openshift_hosted_logging_elasticsearch_pvc_dynamic: Set to `true` to have created PersistentVolumeClaims annotated such that their backing storage can be dynamically provisioned (if that is available for your cluster).
 - openshift_hosted_logging_elasticsearch_storage_group: Number of a supplemental group ID for access to Elasticsearch storage volumes; backing volumes should allow access by this group ID (defaults to 65534).
 - openshift_hosted_logging_elasticsearch_nodeselector: Specify the nodeSelector that Elasticsearch should be use (label=value)
-- openshift_hosted_logging_fluentd_nodeselector: The nodeSelector to use for the Fluentd DaemonSet. Defaults to "logging-infra-fluentd=true".
+- openshift_hosted_logging_fluentd_nodeselector: The nodeSelector used to determine which nodes to apply the `openshift_hosted_logging_fluentd_nodeselector_label` label to.
+- openshift_hosted_logging_fluentd_nodeselector_label: The label applied to nodes included in the Fluentd DaemonSet. Defaults to "logging-infra-fluentd=true".
 - openshift_hosted_logging_kibana_nodeselector: Specify the nodeSelector that Kibana should be use (label=value)
 - openshift_hosted_logging_curator_nodeselector: Specify the nodeSelector that Curator should be use (label=value)
 - openshift_hosted_logging_enable_ops_cluster: If "true", configure a second ES cluster and Kibana for ops logs.

roles/openshift_hosted_logging/tasks/deploy_logging.yaml

@@ -138,7 +138,7 @@
     delay: 10
 
   - name: "Deploy fluentd by labeling the node"
-    shell:  "{{ openshift.common.client_binary }} --config={{ mktemp.stdout }}/admin.kubeconfig label node {{ openshift_hostname }} {{ openshift_hosted_logging_fluentd_nodeselector if openshift_hosted_logging_fluentd_nodeselector is defined else 'logging-infra-fluentd=true' }}"
+    shell:  "{{ openshift.common.client_binary }} --config={{ mktemp.stdout }}/admin.kubeconfig label node --overwrite=true {{ '-l openshift_hosted_logging_fluentd_nodeselector' if openshift_hosted_logging_fluentd_nodeselector is defined else '--all' }} {{ openshift_hosted_logging_fluentd_nodeselector_label if openshift_hosted_logging_fluentd_nodeselector_label is defined else 'logging-infra-fluentd=true' }}"
 
   - name: "Wait for fluentd to be running"
     shell:  "{{ openshift.common.client_binary }} --config={{ mktemp.stdout }}/admin.kubeconfig get pods -l component=fluentd | grep Running"

roles/openshift_hosted_logging/vars/main.yaml

@@ -19,7 +19,7 @@ es_ops_pvcd_cmap_param: "{{ '--from-literal es-ops-pvc-dynamic=' ~ openshift_hos
 es_sg_cmap_param: "{{ '--from-literal storage-group=' ~ openshift_hosted_logging_elasticsearch_storage_group | string | quote if openshift_hosted_logging_elasticsearch_storage_group is defined else '' }}"
 es_ns_cmap_param: "{{ '--from-literal es-nodeselector=' ~ openshift_hosted_logging_elasticsearch_nodeselector | quote if openshift_hosted_logging_elasticsearch_nodeselector is defined else '' }}"
 es_ops_ns_cmap_param: "{{ '--from-literal es-ops-nodeselector=' ~ openshift_hosted_logging_elasticsearch_ops_nodeselector | quote if openshift_hosted_logging_elasticsearch_ops_nodeselector is defined else '' }}"
-fd_ns_cmap_param: "{{ '--from-literal fluentd-nodeselector=' ~ openshift_hosted_logging_fluentd_nodeselector | quote if openshift_hosted_logging_fluentd_nodeselector is defined else 'logging-infra-fluentd=true' }}"
+fd_ns_cmap_param: "{{ '--from-literal fluentd-nodeselector=' ~ openshift_hosted_logging_fluentd_nodeselector_label | quote if openshift_hosted_logging_fluentd_nodeselector_label is defined else 'logging-infra-fluentd=true' }}"
 kb_ns_cmap_param: "{{ '--from-literal kibana-nodeselector=' ~ openshift_hosted_logging_kibana_nodeselector | quote if openshift_hosted_logging_kibana_nodeselector is defined else '' }}"
 kb_ops_ns_cmap_param: "{{ '--from-literal kibana-ops-nodeselector=' ~ openshift_hosted_logging_kibana_ops_nodeselector | quote if openshift_hosted_logging_kibana_ops_nodeselector is defined else '' }}"
 cr_ns_cmap_param: "{{ '--from-literal curator-nodeselector=' ~ openshift_hosted_logging_curator_nodeselector | quote if openshift_hosted_logging_curator_nodeselector is defined else '' }}"