Move grafana precheck into its own role

Change-Id: Ic2ad2b38d7e1c988f9dca9dc0d377cfee7b89504
Partially-implements: blueprint condition-pre-check

ansible/roles/grafana/tasks/precheck.yml

 ---
+- name: Get container facts
+  kolla_container_facts:
+    name:
+      - grafana
+  register: container_facts
+
+- name: Checking free port for Grafana server
+  wait_for:
+    host: "{{ hostvars[inventory_hostname]['ansible_' + api_interface]['ipv4']['address'] }}"
+    port: "{{ grafana_server_port }}"
+    connect_timeout: 1
+    state: stopped
+  when:
+    - container_facts['grafana'] is not defined
+    - inventory_hostname in groups['grafana']

ansible/roles/haproxy/tasks/precheck.yml

@@ -124,6 +124,17 @@
     - "{{ 'gnocchi_api' not in haproxy_stat }}"
     - inventory_hostname in groups['haproxy']
 
+- name: Checking free port for Grafana server HAProxy
+  wait_for:
+    host: "{{ kolla_internal_vip_address }}"
+    port: "{{ grafana_server_port }}"
+    connect_timeout: 1
+    state: stopped
+  when:
+    - enable_grafana | bool
+    - "{{ 'grafana_server' not in haproxy_stat }}"
+    - inventory_hostname in groups['haproxy']
+
 - name: Checking free port for Heat API HAProxy
   wait_for:
     host: "{{ kolla_internal_vip_address }}"

ansible/roles/prechecks/tasks/port_checks.yml

@@ -540,26 +540,6 @@
     - enable_ceph_rgw | bool
     - inventory_hostname in groups['haproxy']
 
-- name: Checking free port for Grafana server
-  wait_for:
-    host: "{{ hostvars[inventory_hostname]['ansible_' + api_interface]['ipv4']['address'] }}"
-    port: "{{ grafana_server_port }}"
-    connect_timeout: 1
-    state: stopped
-  when:
-    - enable_grafana | bool
-    - inventory_hostname in groups['grafana']
-
-- name: Checking free port for Grafana server HAProxy
-  wait_for:
-    host: "{{ kolla_internal_vip_address }}"
-    port: "{{ grafana_server_port }}"
-    connect_timeout: 1
-    state: stopped
-  when:
-    - enable_grafana | bool
-    - inventory_hostname in groups['haproxy']
-
 - name: Checking free port for Searchlight API
   wait_for:
     host: "{{ hostvars[inventory_hostname]['ansible_' + api_interface]['ipv4']['address'] }}"