If you're sending data to Graphite from Ruby, GraphiteMetric will help you get it in the right format. For now, it only supports the plaintext protocol, but pickle should be relatively easy to add. Contributions are welcome.

If you're loading data from graphite-web, you can use the raw protocol and apply a few transformations before consuming it.

At GoSquared, we're using graphite extensively. Some services use it directly via TCP, others via UDP (direct or via aggregators such as statsd). When metrics delivery is critical, we push them into our RabbitMQ cluster. Carbon agent supports AMQP natively.

USAGE

GraphiteMetric::Plaintext

From values

graphite_metric = GraphiteMetric::Plaintext.new("visitors", 2)

graphite_metric.key
=> "visitors"

graphite_metric.value
=> 2

graphite_metric.timestamp
=> 1331043095

graphite_metric.to_s
=> "visitors 2 1331043095"

"#{graphite_metric}"
=> "visitors 2 1331043095"

From hash

gmp = GraphiteMetric::Plaintext.from_hash(
  :key       => "visitors",
  :value     => 2,
  :timestamp => Time.now.to_i
)

"#{gmp}"
=> "visitors 2 1331039853"

From array (of hashes)

gmps = GraphiteMetric::Plaintext.from_array([
  {
    :key       => "visitors",
    :value     => 1,
    :timestamp => Time.now.to_i
  },
  {
    :key   => "visitors",
    :value => 5
  }
]

gmps.map(&:to_s)
["visitors 1 1331039914", "visitors 5 1331043514"]

GraphiteMetric::Raw

It supports single as well as multiple raw metrics (multiple targets). For simplicity, all examples will use single metrics:

gmr = GraphiteMetric::Raw.new("my.metric,1336559725,1336559845,60|34.999,35.10,33.0")

gmr.metrics
=> [{:key=>"my.metric", :timestamp=>1336559725, :value=>34.999},
 {:key=>"my.metric", :timestamp=>1336559785, :value=>35.1},
 {:key=>"my.metric", :timestamp=>1336559845, :value=>33.0}]

Round all values

gmr.round
=> #<GraphiteMetric::Raw:0x00000104054fb0
 @metrics=
  [{:key=>"my.metric", :timestamp=>1336559725, :value=>35},
   {:key=>"my.metric", :timestamp=>1336559785, :value=>35},
   {:key=>"my.metric", :timestamp=>1336559845, :value=>33}],
 @raw="my.metric,1336559725,1336559845,60|34.999,35.10,33.0\n">

Timeshift timestamps

Graphite 0.9.9 didn't support positive timeShifts. Until 0.9.10 is released:

gmr.timeshift(3600)
=> #<GraphiteMetric::Raw:0x00000104054fb0
 @metrics=
  [{:key=>"my.metric", :timestamp=>1336563325, :value=>35},
   {:key=>"my.metric", :timestamp=>1336563385, :value=>35},
   {:key=>"my.metric", :timestamp=>1336563445, :value=>33}],
 @raw="my.metric,1336559725,1336559845,60|34.999,35.10,33.0\n">

Group metrics by key

gmr.grouped_metrics
=> {"my.metric"=>
  [{:timestamp=>1336563325, :value=>35},
   {:timestamp=>1336563385, :value=>35},
   {:timestamp=>1336563445, :value=>33}]}

Reset metrics

Both timeshifting and rounding modify the internal @metrics. If you need to reset them back to their original state:

gmr.populate_from_raw
=> #<GraphiteMetric::Raw:0x00000101fc0ab0
 @metrics=
  [{:key=>"my.metric", :timestamp=>1336559725, :value=>34.999},
   {:key=>"my.metric", :timestamp=>1336559785, :value=>35.1},
   {:key=>"my.metric", :timestamp=>1336559845, :value=>33.0}],
 @raw="my.metric,1336559725,1336559845,60|34.999,35.10,33.0\n">

Ruby 1.8

All our development and production systems run 1.9. We have no intention of making this 1.8 compatible.

LICENSE

(The MIT license)

Copyright (c) Gerhard Lazu

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.