Add influxdb server for metrics

ansible/roles/forrest/tasks/grafana.yml

@@ -1,4 +1,4 @@
-- name: Create install directory
+- name: Create grafana install directory
   file:
     path: /opt/grafana
     state: directory
@@ -6,9 +6,9 @@
     mode: "{{ docker_compose_directory_mask }}"
   become: true
 
-- name: Install compose file
+- name: Install grafana compose file
   template:
-    src: files/docker-compose.yml
+    src: files/docker-compose-grafana.yml
     dest: /opt/grafana/docker-compose.yml
     mode: "{{ docker_compose_file_mask }}"
     owner: "{{ docker_user.name }}"