Add a collectd/web-service role for monitoring site latency.

roles/collectd/web-service/tasks/main.yml

@@ -0,0 +1,14 @@
+---
+
+- name: Copy in /usr/local/bin/web-service-collectd
+  template: >
+    src=web-service-collectd.py
+    dest="/usr/local/bin/web-service-collectd-{{ site }}"
+    mode=0755
+  notify: restart collectd
+
+- name: Copy in /etc/collectd.d/web-service.conf
+  template: >
+    src=web-service.conf
+    dest=/etc/collectd.d/{{ site }}.conf
+  notify: restart collectd

roles/collectd/web-service/templates/web-service-collectd.py

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+#!/usr/bin/env python
+""" monitor website request times for collectd """
+
+import time
+import urllib
+
+
+hostname = socket.gethostname()  # Use FQDN, I guess..
+
+
+def get_loadtime(url):
+    start = time.time()
+    _ = urllib.urlopen(url)
+    return time.time() - start
+
+
+if __name__ == '__main__':
+    site = "{{ site }}"
+    url = "{{ url }}"
+    interval = int("{{ interval }}")
+
+    try:
+        loadtime = get_loadtime(url)
+        timestamp = int(time.time())
+        print "PUTVAL %s/%s/delay-%s interval=%i %i:%i" % (
+            hostname, 'web', site, interval, timestamp, loadtime)
+        sleep(interval)
+    except KeyboardInterrupt:
+        pass

roles/collectd/web-service/templates/web-service.conf

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+LoadPlugin exec
+<Plugin exec>
+    Exec "collectd" "/usr/local/bin/web-service-collectd-{{ site }}"
+</Plugin>