Basic collectd-based server monitoring. Sends stats to Graphite.
Collectd metrics:
- CPU used/free/idle/etc
- Free disk (via the .dockerinit filesystem)
- Load average
- Memory used/free/etc
HOST_NAME- Will be sent to Graphite
- Required
GRAPHITE_HOST- Graphite IP or hostname
- Required
GRAPHITE_PORT- Graphite port
- Optional, defaults to 2003
GRAPHITE_PREFIX- Graphite prefix
- Optional, defaults to collectd.