Added a node_exporter role initially built for...

peregrine.

roles/node_exporter/tasks/main.yml

@@ -0,0 +1,36 @@
+---
+- file:
+    path: /usr/local/prometheus
+    state: directory
+    mode: 0755
+
+- name: Install node exporter
+  copy:
+    src: "{{ playbook_dir }}/promtools/results/node_exporter"
+    dest: /usr/local/prometheus/node_exporter
+    mode: 0755
+
+- name: Install service files.
+  template:
+    src: templates/node-exporter.service
+    dest: /etc/systemd/system/node-exporter.service
+    mode: 644
+    owner: root
+    group: root
+  tags:
+      - service-files
+
+- name: install service files
+  command: systemctl daemon-reload
+
+- name: enable service at boot
+  systemd:
+    name: node-exporter
+    enabled: yes
+
+- name: make sure servcies are started.
+  systemd:
+    name: node-exporter.service
+    state: restarted
+  tags:
+      - start-service

roles/node_exporter/templates/node-exporter.service

@@ -0,0 +1,16 @@
+[Unit]
+Description=prometheus node exporter
+
+[Service]
+TimeoutStartSec=0
+Restart=always
+ExecStart=/usr/local/prometheus/node_exporter \
+ --collector.filesystem.ignored-mount-points "^/(sys|proc|dev|host|etc)($|/)" \
+{% if 'login' in role_names %}
+    --collector.filesystem.ignored-fs-types="^(sys|proc|auto|cgroup|devpts|ns|au|fuse\.lxc|mqueue|overlay)(fs|)$$"
+{% else %}
+    --collector.filesystem.ignored-fs-types="^(sys|proc|auto|cgroup|devpts|ns|au|fuse\.lxc|mqueue|overlay|lustre)(fs|)$$"
+{% endif %}
+
+[Install]
+WantedBy=multi-user.target