Validation to check ulimits on controller

Change-Id: If653cc97e28c84a55c214eb6d2580b0b7e48acbc
Co-Authored-By: John Browning <jecbrowning@gmail.com>

validations/controller-ulimits.yaml

@@ -0,0 +1,38 @@
+---
+- hosts: controller
+  vars:
+    metadata:
+      name: Check controller ulimits
+      description: >
+        This will check the ulimits of each controller.
+      groups:
+      - post-deployment
+    nofiles_min: 2048
+    nproc_min: 2048
+
+  tasks:
+  - name: Get nofiles limit
+    become: true
+    # NOTE: `ulimit` is a shell builtin so we have to invoke it like this:
+    command: sh -c "ulimit -n"
+    register: nofilesval
+    changed_when: False
+  - name: Check nofiles limit
+    fail:
+      msg: >
+        nofiles is set to {{ nofilesval.stdout }}.  It should be at least
+        {{ nofiles_min }} or higher, depending on available resources.
+    failed_when: "{{ nofilesval.stdout|int }} < {{ nofiles_min }}"
+
+  - name: Get nproc limit
+    become: true
+    # NOTE: `ulimit` is a shell builtin so we have to invoke it like this:
+    command: sh -c "ulimit -u"
+    register: nprocval
+    changed_when: False
+  - name: Check nproc limit
+    fail:
+      msg: >
+        nproc is set to {{ nprocval.stdout }}.  It should be at least
+        {{ nproc_min }} or higher, depending on available resources.
+    failed_when: "{{ nprocval.stdout|int }} < {{ nproc_min }}"