Collect dstat on overcloud nodes

Start dstat on overcloud before tempest runs.

Closes-Bug: #1674382

Change-Id: Ifd4bea27b2c5f31b30580c098024ba55c8abda51

playbooks/baremetal-full-overcloud-validate.yml

@@ -1,5 +1,12 @@
 ---
 # Execute sanity checks agsinst the overcloud deployment
+- name: setup dstat performance monitoring
+  hosts: overcloud
+  tags:
+    - overcloud-validate
+  roles:
+    - { role: validate-perf, when: validate_performance|bool }
+
 - name: Sanity check the overcloud services
   hosts: undercloud
   tags:

playbooks/multinode-validate.yml

@@ -1,4 +1,11 @@
 ---
+- name: setup dstat performance monitoring
+  hosts: overcloud
+  tags:
+    - overcloud-validate
+  roles:
+    - { role: validate-perf, when: validate_performance|bool }
+
 # Validate the deployment
 - name:  validate the overcloud
   hosts: undercloud

playbooks/quickstart-extras-validate.yml

@@ -1,4 +1,11 @@
 # Validate the deployment
+- name: setup dstat performance monitoring
+  hosts: overcloud
+  tags:
+    - overcloud-validate
+  roles:
+    - { role: validate-perf, when: validate_performance|bool }
+
 - name:  validate the overcloud
   hosts: undercloud
   tags:

roles/extras-common/defaults/main.yml

@@ -33,3 +33,6 @@ undercloud_rpm_dependencies: >-
 # If `test_ping` is `true`, run a simple ping test to validate the
 # overcloud.
 test_ping: true
+
+# install and execute dstat across nodes
+validate_performance: true

roles/undercloud-deploy/tasks/install-undercloud.yml

@@ -1,20 +1,6 @@
-- name: Prepare directory with extra logs
+- name: Run dstat on the undercloud prior to undercloud install
-  file: dest=/var/log/extra state=directory
+  include_role:
-  become: true
+    name: validate-perf
-
-- name: Install dstat if it is not present
-  yum:
-    name: dstat
-    state: present
-  become: true
-
-- name: Run dstat for collecting metrics during 2 hours
-  command: >
-    dstat -tcmndrylpg --nocolor --output /var/log/extra/dstat-csv.log 1 7200 \
-    >/dev/null
-  async: 7200
-  poll: 0
-  become: true
   when: step_install_undercloud|bool
 
 - name: Install the undercloud

roles/validate-perf/defaults/main.yml

@@ -0,0 +1,4 @@
+dstat_log_name: dstat-csv.log
+dstat_options: tcmndrylpg
+dstat_delay: 1
+dstat_count: 7200

roles/validate-perf/meta/main.yml

@@ -0,0 +1,2 @@
+dependencies:
+  - extras-common

roles/validate-perf/tasks/main.yml

@@ -0,0 +1,27 @@
+---
+- name: install the latest version of dstat on overcloud
+  package:
+    name: dstat
+    state: present
+  become: true
+
+- name: ensure /var/log/extra exists
+  file:
+    path: /var/log/extra
+    state: directory
+    mode: 0755
+  become: true
+
+- name: Run dstat for collecting metrics on overcloud
+  command: >-
+    dstat
+    -{{ dstat_options }}
+    --nocolor
+    --output /var/log/extra/{{ dstat_log_name }}
+    {{ dstat_delay }}
+    {{ dstat_count }}
+    > /dev/null
+  async: 7200
+  poll: 0
+  become: true
+  changed_when: false