Carbon-C-Relay

Carbon-C-Relay provides an efficient way to aggregate, filter, and forward metrics to Hosted Graphite, particularly for systems within a private network.

Carbon-C-Relay is a lightweight, high-performance proxy that acts as an intermediary between metric sources and Hosted Graphite. It is commonly used for pre-aggregation and securely forwarding metrics from private networks to external destinations. You can locate the latest releases/assets HERE, and see configuration syntax HERE. Below is a basic sample configuration and setup:

Installation (Linux):

sudo apt install -y carbon-c-relay

Modify your configuration file with the following (generally located at: /etc/carbon-c-relay.conf):

rewrite ^([a-zA-Z0-9_\.\-]*)
  into <HG-API-KEY>.\1
  ;

cluster hg
  forward
    carbon.hostedgraphite.com:2003
  ;

# Forward internal relay system metrics with the carbon.relays prefix
match ^carbon\.relays\..*
  send to hg
  stop
  ;

match *
  send to hg
  stop
  ;

Restart the service and check status:

sudo systemctl restart carbon-c-relay
sudo systemctl status carbon-c-relay

Now, any metrics sent to localhost:2003 will be collected and forwarded by the Carbon-C-Relay service. Additionally, internal relay performance metrics (carbon.relays.*) will be automatically forwarded to your Hosted Graphite account.

Carbon-C-Relay Example Dashboard