openQA: try to make NFS mount changes more robust

On client end, restart mount unit (with daemon-reload) if mount
file changes. On server end, run exportfs -r if export config
file changes.

Signed-off-by: Adam Williamson <awilliam@redhat.com>

roles/openqa/server/tasks/main.yml

@@ -213,12 +213,17 @@
 
 - name: Create exports file
   template: src=exports.j2 dest=/etc/exports.d/openqa.exports owner=root group=root mode=0644
+  register: exportsfile
   tags:
   - config
 
 - name: Enable and start NFS server
   service: name=nfs-server enabled=yes state=started
 
+- name: Refresh exports
+  command: exportfs -r
+  when: exportsfile is changed
+
 - name: Set up Apache config
   template: src=openqa.conf.httpd.j2 dest=/etc/httpd/conf.d/openqa.conf owner=root group=root mode=0644
   notify:

roles/openqa/worker/tasks/nfs-client.yml

@@ -14,6 +14,7 @@
 
 - name: Create mount unit
   template: src=var-lib-openqa-share.mount.j2 dest=/etc/systemd/system/var-lib-openqa-share.mount owner=root group=root mode=0644
+  register: sharemount
   tags:
   - config
 
@@ -22,3 +23,7 @@
   with_items:
   - var-lib-openqa-share.mount
   - remote-fs.target
+
+- name: Restart mount if unit changed
+  systemd: name=var-lib-openqa-share.mount state=started daemon_reload=yes
+  when: sharemount is changed