Added a node_exporter role initially built for...

peregrine.

node_exporter.yml

@@ -0,0 +1,5 @@
+---
+- hosts: all
+  become: True
+  roles:
+     - node_exporter

promtools/Dockerfile

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+FROM golang:1.9-stretch
+
+MAINTAINER Egon Rijpkema <e.m.a.rijpkema@rug.nl>
+
+RUN mkdir /results
+
+RUN go get github.com/prometheus/node_exporter && \
+    cd ${GOPATH-$HOME/go}/src/github.com/prometheus/node_exporter && \
+    make && \
+    cp node_exporter /results
+
+RUN go get github.com/robustperception/pushprox/proxy && \
+    cd ${GOPATH-$HOME/go}/src/github.com/robustperception/pushprox/proxy && \
+    go build && \
+    cp /go/bin/proxy /results
+
+RUN go get github.com/robustperception/pushprox/client && \
+    cd ${GOPATH-$HOME/go}/src/github.com/robustperception/pushprox/client && \
+    go build && \
+    cp /go/bin/client /results
+
+CMD /go/bin/proxy

promtools/addport.py

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+#!/usr/bin/env python3
+'''
+Pushprox:  does not include the port number in its targets json
+on the /clients endpoint. while Prometheus does seem to need it.
+
+for more info see: https://github.com/RobustPerception/PushProx
+'''
+
+import json
+from urllib import request
+
+url = 'http://knyft.hpc.rug.nl:6060/clients'
+outfile = 'targets.json'
+
+data = json.loads(request.urlopen(url).read().decode('utf-8'))
+
+targets = []
+
+for node in data:
+    for target in node['targets']:
+        if target[-5:] != '9100':
+            target = '{}:9100'.format(target)
+            targets.append(target)
+
+with open(outfile, 'w') as handle:
+    handle.write(json.dumps(
+        [{
+        "targets" : targets,
+        "labels": {
+            "env": "peregrine",
+            "job": "node"
+            }
+        }]
+        ,indent=4 ))

promtools/build.sh

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+#!/bin/bash -ex
+
+mkdir -p results
+docker build . -t promtools
+docker run -d --name promtools --rm promtools sleep 3
+docker cp promtools:/results .

roles/node_exporter/tasks/main.yml

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+---
+- 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

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+[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