add prometheus node exporters and agent

ansible/roles/prometheus_agent/tasks/main.yml

@@ -0,0 +1,21 @@
+- name: Create prometheus directory
+  file:
+    path: /root/prometheus
+    state: directory
+
+- name: Copy prometheus config
+  copy:
+    src: "{{ role_path }}/prometheus.yml"
+    dest: /root/prometheus/prometheus.yml
+
+- name: Copy prometheus systemd unit
+  copy:
+    src: "{{ role_path }}/container-prometheus.service"
+    dest: /etc/systemd/system/container-prometheus.service
+  notify: systemd daemon reload
+
+- name: Enable prometheus systemd unit
+  systemd:
+    name: container-prometheus.service
+    enabled: true
+    state: started