Fix grafana data source registration

Make data source creation more dynamic to support a variable number of data
source of different types

Only create data sources actually deployed by kolla

Change-Id: I26a2d3c71b178562b906623ab77eaff673c81dce

ansible/roles/grafana/defaults/main.yml

@@ -23,16 +23,17 @@ grafana_database_address: "{{ kolla_internal_fqdn }}:{{ database_port }}"
 ####################
 # Datasource
 ####################
-grafana_data_source:
-  isDefault: yes
-  database: "telegraf"
-  user: admin
-  password: "{{ grafana_admin_password }}"
-  name: "telegraf"
-  type: "influxdb"
-  url: "{{ internal_protocol }}://{{ api_interface_address }}:{{ influxdb_http_port }}"
-  access: "proxy"
-  basicAuth: false
+grafana_data_sources:
+  influxdb:
+    enabled: "{{ enable_influxdb | bool }}"
+    data:
+      isDefault: yes
+      database: "telegraf"
+      name: "telegraf"
+      type: "influxdb"
+      url: "{{ internal_protocol }}://{{ api_interface_address }}:{{ influxdb_http_port }}"
+      access: "proxy"
+      basicAuth: false
 
 ##########
 # Grafana

ansible/roles/grafana/tasks/post_config.yml

@@ -10,20 +10,21 @@
   run_once: true
   connection: local
 
-- name: Enable influxdb datasource
+- name: Enable grafana datasources
   uri:
     url: "{{ internal_protocol }}://{{ kolla_internal_vip_address }}:{{ grafana_server_port }}/api/datasources"
     method: POST
     user: admin
     password: "{{ grafana_admin_password }}"
-    body: "{{ grafana_data_source | to_json }}"
+    body: "{{ item.value.data | to_json }}"
     body_format: json
     force_basic_auth: yes
     status_code: 200, 409
   register: response
   run_once: True
   connection: local
-  when: grafana_data_source is defined
   changed_when: response.status == 200
   failed_when: response.status not in [200, 409] or
                response.status == 409 and ("Data source with same name already exists" not in response.json.message|default(""))
+  with_dict: "{{ grafana_data_sources }}"
+  when: item.value.enabled | bool