Add rabbitmq-limits role

This patch adds the rabbitmq-limits role created from
validations/rabbitmq-limits.yaml.

Change-Id: If81d39e238e55d82ac19a6a9240df087e77e6825
Depends-on: I7541bfd244acaf1d00d18b3eef031dbadfe4dd4a
Implements: blueprint validation-framework
Signed-off-by: Gael Chamoulaud <gchamoul@redhat.com>

playbooks/rabbitmq-limits.yaml

@@ -0,0 +1,12 @@
+---
+- hosts: Controller
+  vars:
+    metadata:
+      name: Rabbitmq limits
+      description: >
+        Make sure the rabbitmq file descriptor limits are set to reasonable values.
+      groups:
+        - post-deployment
+    min_fd_limit: 16384
+  roles:
+    - rabbitmq-limits

roles/rabbitmq-limits/defaults/main.yml

@@ -0,0 +1,2 @@
+---
+min_fd_limit: 16384

roles/rabbitmq-limits/meta/main.yml

@@ -0,0 +1,28 @@
+galaxy_info:
+  author: TripleO Validations Team
+  company: Red Hat
+  license: Apache
+  min_ansible_version: 2.4
+
+  platforms:
+  - name: CentOS
+    versions:
+    - 7
+  - name: RHEL
+    versions:
+    - 7
+
+  categories:
+    - cloud
+    - baremetal
+    - system
+
+  galaxy_tags: []
+    # List tags for your role here, one per line. A tag is a keyword that describes
+    # and categorizes the role. Users find roles by searching for tags. Be sure to
+    # remove the '[]' above, if you add tags to this list.
+    #
+    # NOTE: A tag is limited to a single word comprised of alphanumeric characters.
+    #       Maximum 20 tags per role.
+
+dependencies: []

roles/rabbitmq-limits/tasks/main.yml

@@ -0,0 +1,18 @@
+---
+- name: Set container_cli fact from the inventory
+  set_fact:
+    container_cli: "{{ hostvars[inventory_hostname].container_cli }}"
+
+- name: Get file_descriptors total_limit
+  become: true
+  register: actual_fd_limit
+  shell: >
+    "{{ container_cli }}" exec $("{{ container_cli }}" ps -q --filter "name=rabbitmq" | head -1)
+    rabbitmqctl eval 'proplists:get_value(max_fds, erlang:system_info(check_io)).'
+  changed_when: false
+
+- name: Verify the actual limit exceeds the minimal value
+  fail:
+    msg: >-
+      {{ actual_fd_limit.stdout }} must be greater than or equal to {{ min_fd_limit }}
+  failed_when: "actual_fd_limit.stdout|int < min_fd_limit"

roles/rabbitmq-limits/vars/main.yml

@@ -0,0 +1,7 @@
+---
+metadata:
+  name: Rabbitmq limits
+  description: >
+    Make sure the rabbitmq file descriptor limits are set to reasonable values.
+  groups:
+    - post-deployment