Add role to build the stackviz report

Add a role to build the stackviz report and include it in the
tempest post play.

Change-Id: I085460fc7a4fe6baee2d85c8ab3ea3a2128ea54d
diff --git a/playbooks/post-tempest.yaml b/playbooks/post-tempest.yaml
index 01784f1..820e4f6 100644
--- a/playbooks/post-tempest.yaml
+++ b/playbooks/post-tempest.yaml
@@ -8,13 +8,15 @@
     - role: process-test-results
       test_results_dir: '{{ logs_root }}/tempest'
       tox_envdir: tempest
+    - role: process-stackviz
     - role: stage-output
       zuul_copy_output:
         { '{{ logs_root }}/tempest/etc/tempest.conf': 'logs',
           '{{ logs_root }}/tempest/etc/accounts.yaml': 'logs',
           '{{ logs_root }}/tempest/tempest.log': 'logs',
           '{{ stage_dir }}/{{ test_results_stage_name }}.subunit': 'logs',
-          '{{ stage_dir }}/{{ test_results_stage_name }}.html': 'logs' }
+          '{{ stage_dir }}/{{ test_results_stage_name }}.html': 'logs',
+          '{{ stage_dir }}/stackviz': 'logs' }
       extensions_to_txt:
         - conf
         - log
diff --git a/roles/process-stackviz/README.rst b/roles/process-stackviz/README.rst
new file mode 100644
index 0000000..b05326d
--- /dev/null
+++ b/roles/process-stackviz/README.rst
@@ -0,0 +1,22 @@
+Generate stackviz report.
+
+Generate stackviz report using subunit and dstat data, using
+the stackviz archive embedded in test images.
+
+**Role Variables**
+
+.. zuul:rolevar:: devstack_base_dir
+   :default: /opt/stack
+
+   The devstack base directory.
+
+.. zuul:rolevar:: stage_dir
+   :default: /opt/stack/logs
+
+   The stage directory where the input data can be found and
+   the output will be produced.
+
+.. zuul:rolevar:: test_results_stage_name
+   :default: test_results
+
+   The name of the subunit file to be used as input.
diff --git a/roles/process-stackviz/defaults/main.yaml b/roles/process-stackviz/defaults/main.yaml
new file mode 100644
index 0000000..b1eb8d9
--- /dev/null
+++ b/roles/process-stackviz/defaults/main.yaml
@@ -0,0 +1,3 @@
+devstack_base_dir: /opt/stack
+stage_dir: /opt/stack/
+test_results_stage_name: test_results
diff --git a/roles/process-stackviz/tasks/main.yaml b/roles/process-stackviz/tasks/main.yaml
new file mode 100644
index 0000000..09de606
--- /dev/null
+++ b/roles/process-stackviz/tasks/main.yaml
@@ -0,0 +1,63 @@
+- name: Check if stackviz archive exists
+  stat:
+    path: "/opt/cache/files/stackviz-latest.tar.gz"
+  register: stackviz_archive
+
+- debug:
+    msg: "Stackviz archive could not be found in /opt/cache/files/stackviz-latest.tar.gz"
+  when: not stackviz_archive.stat.exists
+
+- name: Check if subunit data exists
+  stat:
+    path: "{{ stage_dir }}/{{ test_results_stage_name }}.subunit"
+  register: subunit_input
+
+- debug:
+    msg: "Subunit file could not be found at {{ stage_dir }}/{{ test_results_stage_name }}.subunit"
+  when: not subunit_input.stat.exists
+
+- name: Install stackviz
+  pip:
+    name: "file://{{ stackviz_archive.stat.path }}"
+    virtualenv: /tmp/stackviz
+    extra_args: -U
+  when:
+    - stackviz_archive.stat.exists
+    - subunit_input.stat.exists
+
+- name: Deploy stackviz static html+js
+  command: cp -pR /tmp/stackviz/share/stackviz-html {{ stage_dir }}/stackviz
+  when:
+    - stackviz_archive.stat.exists
+    - subunit_input.stat.exists
+
+- name: Check if dstat data exists
+  stat:
+    path: "{{ devstack_base_dir }}/logs/dstat-csv.log"
+  register: dstat_input
+  when:
+    - stackviz_archive.stat.exists
+    - subunit_input.stat.exists
+
+- name: Run stackviz with dstat
+  shell: |
+    cat {{ subunit_input.stat.path }} | \
+      /tmp/stackviz/bin/stackviz-export \
+        --dstat "{{ devstack_base_dir }}/logs/dstat-csv.log" \
+        --env --stdin \
+        {{ stage_dir }}/stackviz/data
+  when:
+    - stackviz_archive.stat.exists
+    - subunit_input.stat.exists
+    - dstat_input.stat.exists
+
+- name: Run stackviz without dstat
+  shell: |
+    cat {{ subunit_input.stat.path }} | \
+      /tmp/stackviz/bin/stackviz-export \
+        --env --stdin \
+        {{ stage_dir }}/stackviz/data
+  when:
+    - stackviz_archive.stat.exists
+    - subunit_input.stat.exists
+    - not dstat_input.stat.exists