Collectd Installation

Install : 

# apt-get install collectd

Configuration :

# vi /etc/collectd/collectd.conf

Hostname "XXX"
BaseDir "/var/lib/collectd"
PIDFile "/var/run/collectd.pid"
PluginDir "/usr/local/lib/collectd"
TypesDB "/usr/local/share/collectd/types.db"

Interval 10

# 停用 rrdtool
# LoadPlugin rrdtool

# 啓用輸出到 graphite

LoadPlugin write_graphite

Host "localhost"
Port "2003"
Protocol "tcp"
LogSendErrors true
Prefix "collectd."
StoreRates true
AlwaysAppendDS false
EscapeCharacter "_"

# /etc/init.d/collectd restart

References :
How To Configure Collectd to Gather System Metrics for Graphite on Ubuntu 14.04 | DigitalOcean