Collect devstack config files in post.

Co-Authored-By: yong sheng gong <gong.yongsheng@99cloud.net>
Co-Authored-By: Dean Troyer <dtroyer@gmail.com>
Co-Authored-By: Andrea Frittoli <andrea.frittoli@gmail.com>

Change-Id: Id9ad3be4be25e699f77d6b5a252f046ce8234f45
diff --git a/playbooks/post.yaml b/playbooks/post.yaml
index 6f5126f..95c3669 100644
--- a/playbooks/post.yaml
+++ b/playbooks/post.yaml
@@ -1,4 +1,14 @@
 - hosts: all
+  become: True
+  vars:
+    devstack_conf_dir: "{{ devstack_base_dir|default('/opt/stack') }}/devstack/"
+    stage_dir: "{{ devstack_base_dir|default('/opt/stack') }}"
   roles:
     - export-devstack-journal
+    - role: stage-output
+      zuul_copy_output:
+        { '{{ devstack_conf_dir }}/local.conf': 'logs',
+          '{{ devstack_conf_dir }}/.stackenv': 'logs' }
+      extensions_to_txt:
+        - conf
     - fetch-devstack-log-dir