add node exporters to hypervisor hosts

ansible/inventory/group_vars/main.yml

@@ -0,0 +1 @@
+node_exporter_version: 1.6.1

ansible/prometheus.yml

@@ -0,0 +1,6 @@
+---
+- name: Setup prometheus
+  hosts: hypervisors
+
+  roles:
+    - role: geerlingguy.node_exporter

ansible/requirements.yml

@@ -1,3 +1,5 @@
+---
+roles:
 - name: setup_apt
   src: https://github.com/sunscrapers/ansible-role-apt.git
   scm: git
@@ -13,3 +15,4 @@
 - name: postgresql_database
   src: https://git.kun.is/home/ansible-role-postgresql-database
   scm: git
+- name: geerlingguy.node_exporter