Add telegraf role

And enable it for ceph nodes.

roles/telegraf/tasks/main.yml

@@ -0,0 +1,11 @@
+- name: Get influxdb info
+  set_fact:
+    influxdb_info: '{{ lookup("passwordstore", "vm/"~influxdb_host, returnall=true, missing="empty") | from_yaml }}'
+
+- name: Create influxdb token for this host
+  include_tasks: token.yml
+  when: 'not ansible_check_mode and "influxdb_token" not in password'
+
+- name: Install telegraf on Debian
+  include_tasks: debian.yml
+  when: ansible_os_family == "Debian"