Check if Gnocchi api processes is > 1.

This does check if gnocchi is in the httpd configuration
directory (which should indicate if gnocchi is installed
on the system, though it may still not be setup to be
running)

Change-Id: I8eacbe66769758e1667165b0629d7051cf98ad9d

ansible/check/group_vars/controller.yml

@@ -9,6 +9,7 @@ nova_vif_timeout: 300
 netdev_max_backlog: 100000
 keystone_threads: 6
 keystone_processes: 2
+gnocchi_api_processes: 2
 
 checks :
     bz1095811 :
@@ -96,3 +97,8 @@ checks :
         description: "Overcloud deployed with keystone as single process leads to abysmal performance"
         severity: "Critical"
         impact: "Not tuning the workers properly can cause degraded performance"
+    bz1372821:
+        url: "https://bugzilla.redhat.com/show_bug.cgi?id=1372821"
+        description: "Gnocchi API processes tuned to 1 process"
+        severity: "Suggestion"
+        impact: "Not tuning the workers properly can cause degraded performance"

ansible/check/roles/gnocchi/tasks/main.yml

@@ -0,0 +1,15 @@
+---
+#
+# Gnocchi tasks for performance checks
+#
+
+- name: Get httpd configuration files
+  shell: 'ls /etc/httpd/conf.d/'
+  register: httpd_confd_files
+
+- name: Gnocchi API httpd process count
+  shell: egrep -o "processes=[0-9]+" /etc/httpd/conf.d/*gnocchi_wsgi.conf | egrep -o "[0-9]+"
+  register: bz1372821
+  failed_when: bz1372821.stdout|int < gnocchi_api_processes and 'gnocchi' in httpd_confd_files.stdout
+  when: (inventory_hostname in groups.controller)
+  ignore_errors: True

ansible/check/site.yml

@@ -33,6 +33,7 @@
   - neutron
   - nova
   - glance
+  - gnocchi
 
 - hosts: compute
   name: Checking Compute Nodes for common Performance Issues