Enable kolla-ansible to use a custom metrics files with Cloudkitty

Cloudkitty has a default (built-in the container) metrics.yml file
 in the /etc/cloudkitty/metrics.yml files. We would like to be able
 to overwrite/customize these metrics configurations via kolla-ansible.
 Cloudkitty is able to use a custom metric file via "metrics_conf".
 Therefore, we are enabling this configuration via Kolla-ansible.

Change-Id: Id9019298482c040be05f540e71dacfdf0bd77469
Signed-off-by: Rafael Weingärtner <rafael@apache.org>

ansible/roles/cloudkitty/defaults/main.yml

@@ -90,3 +90,4 @@ cloudkitty_git_repository: "{{ kolla_dev_repos_git }}/{{ project_name }}"
 cloudkitty_dev_repos_pull: "{{ kolla_dev_repos_pull }}"
 cloudkitty_dev_mode: "{{ kolla_dev_mode }}"
 cloudkitty_source_version: "{{ kolla_source_version }}"
+cloudkitty_custom_metrics_yaml_file: "metrics.yml"

ansible/roles/cloudkitty/tasks/config.yml

@@ -29,6 +29,28 @@
   when:
     - cloudkitty_policy.results
 
+- name: Check if custom {{ cloudkitty_custom_metrics_yaml_file }} exists
+  local_action: stat path="{{ node_custom_config }}/cloudkitty/{{ cloudkitty_custom_metrics_yaml_file }}"
+  register: cloudkitty_custom_metrics_file
+
+- name: Copying {{ cloudkitty_custom_metrics_yaml_file }} if it exists
+  copy:
+    src: "{{ node_custom_config }}/cloudkitty/{{ cloudkitty_custom_metrics_yaml_file }}"
+    dest: "{{ node_config_directory }}/{{ item.key }}/{{ cloudkitty_custom_metrics_yaml_file }}"
+    mode: "0660"
+  become: true
+  when:
+    - cloudkitty_custom_metrics_file.stat.exists
+    - inventory_hostname in groups[item.value.group]
+    - item.value.enabled | bool
+  with_dict: "{{ cloudkitty_services }}"
+  notify:
+    - "Restart {{ item.key }} container"
+
+- name: Are we using {{ cloudkitty_custom_metrics_yaml_file }}?
+  set_fact:
+    cloudkitty_custom_metrics_used: "{{ cloudkitty_custom_metrics_file.stat.exists }}"
+
 - name: Copying over config.json files for services
   template:
     src: "{{ item.key }}.json.j2"

ansible/roles/cloudkitty/templates/cloudkitty-api.json.j2

@@ -20,6 +20,12 @@
             "dest": "/etc/cloudkitty/{{ cloudkitty_policy_file }}",
             "owner": "cloudkitty",
             "perm": "0600"
+        }{% endif %}{% if cloudkitty_custom_metrics_used %},
+        {
+            "source": "{{ container_config_directory }}/{{ cloudkitty_custom_metrics_yaml_file }}",
+            "dest": "/etc/cloudkitty/{{ cloudkitty_custom_metrics_yaml_file }}",
+            "owner": "cloudkitty",
+            "perm": "0600"
         }{% endif %}
     ],
     "permissions": [

ansible/roles/cloudkitty/templates/cloudkitty-processor.json.j2

@@ -12,6 +12,12 @@
             "dest": "/etc/cloudkitty/{{ cloudkitty_policy_file }}",
             "owner": "cloudkitty",
             "perm": "0600"
+        }{% endif %}{% if cloudkitty_custom_metrics_used %},
+        {
+            "source": "{{ container_config_directory }}/{{ cloudkitty_custom_metrics_yaml_file }}",
+            "dest": "/etc/cloudkitty/{{ cloudkitty_custom_metrics_yaml_file }}",
+            "owner": "cloudkitty",
+            "perm": "0600"
         }{% endif %}
     ],
     "permissions": [

ansible/roles/cloudkitty/templates/cloudkitty.conf.j2

@@ -39,6 +39,9 @@ policy_file = {{ cloudkitty_policy_file }}
 [collect]
 collector = {{ cloudkitty_collector_backend }}
 services = compute,image{% if enable_cinder | bool %},volume{% endif %},network.bw.out,network.bw.in,network.floating
+{% if cloudkitty_custom_metrics_used %}
+metrics_conf = /etc/cloudkitty/{{ cloudkitty_custom_metrics_yaml_file }}
+{% endif %}
 
 [keystone_fetcher]
 keystone_version = 3