Add telegraf role

And enable it for ceph nodes.

roles/telegraf/tasks/debian.yml

@@ -0,0 +1,31 @@
+- name: Add influxdb repository
+  deb822_repository:
+    name: influxdata
+    uris: https://repos.influxdata.com/debian
+    suites: stable
+    components: main
+    architectures: amd64
+    signed_by: https://repos.influxdata.com/influxdata-archive.key
+  notify: update package cache
+
+- meta: flush_handlers
+
+- name: Install telegraf
+  package:
+    name: telegraf
+
+- name: Configure telegraf
+  when: not ansible_check_mode
+  template:
+    dest: /etc/telegraf/telegraf.d/output.conf
+    src: output.conf.j2
+    owner: telegraf
+    group: telegraf
+    mode: 0640
+  notify: restart telegraf
+
+- name: Enable telegraf
+  service:
+    name: telegraf
+    enabled: true
+    state: started