Ganglia to Graphite

Getting Ganglia data into Graphite is easy.

New Data

This assumes that you will keep ganglia running, and you can just poll it. I use this script to do it for me.

The lazy install:

wget https://github.com/ganglia/ganglia_contrib/raw/master/graphite_integration/ganglia_graphite.rb -O /usr/local/bin/ganglia_graphite.rb
chmod +x /usr/local/bin/ganglia_graphite.rb
echo "* * * * * /usr/local/bin/ganglia_graphite.rb" > /etc/cron.d/ganglia_graphite.rb
#Don't forget to install ruby?

Feel free to edit that script to adjust your namespace. I personally junk the "cluster" name and just use "servers"

Historic Data

You are lucky! Graphite can just read the RRD's that Ganglia Outputs. Check this out:

# I put my servers in a folder called, servers. Change as you need:
mkdir -p /opt/graphite/storage/rrd/servers
cd /opt/graphite/storage/rrd/servers
 
# Grab your RRD's from your ganglia server:
rsync -aPv root@ganglia-host:/var/lib/ganglia/rrds/CLUSTER/ .
 
# Graphite uses the "." as a namespace separator, I prefer keep my tree more flat with the number of servers I have
# A rename can do that for you.
rename  's/\./_/g' *

# there is no step 3? Seriously, you just drop the rrds in the rrd folder and give it a good name.