graphite-api

Description

GraphiteAPI provides a way for interacting with Graphite's Carbon Daemon using the GraphiteAPI::Client, that implements Graphite's plaintext protocol.

Package Content

• Includes a simple client for ruby.
• Utilities like scheduling and caching.

Key Features

• Reanimation mode - support cases which the same keys (same timestamps as well) can be received simultaneously and asynchronously from multiple input sources, in these cases GraphiteAPI will "reanimate" old records (records that were already sent to Graphite server), and will send the sum of the reanimated record value + the value of the record that was just received to the graphite server; this new summed record should override the key with the new value on Graphite database.
• non-blocking I/O ( EventMachine aware ).
• Thread-Safe client.

Status

Installation

Install stable version

gem install graphite-api

Client Usage

Creating a new UDP client

require 'graphite-api'

options = {
  # Required: valid URI {udp,tcp}://host:port/?timeout=seconds
  graphite: "udp://graphite.example.com:2003",

  # Optional: add example.prefix to each key
  prefix: ["example","prefix"],

  # Optional: results are aggregated in 60 seconds slices ( default is 60 )
  slice: 60,

  # Optional: send to graphite every 60 seconds ( default is 0 - direct send )
  interval: 60,

  # Optional: set the max age in seconds for records reanimation ( default is 12 hours )
  cache: 4 * 60 * 60,

  # Optional: The default aggregation method for multiple reports in the same slice (default is :sum).
  # Possible options: :sum, :avg, :replace
  default_aggregation_method: :avg
}

client = GraphiteAPI.new options

TCP Client

client = GraphiteAPI.new graphite: "tcp://graphite.example.com:2003"

TCP Client with 30 seconds timeout

client = GraphiteAPI.new graphite: "tcp://graphite.example.com:2003?timeout=30"

TCP Client with custom aggregation method

client = GraphiteAPI.new graphite: "tcp://graphite.example.com:2003", default_aggregation_method: :avg

Adding simple metrics

require 'graphite-api'

client = GraphiteAPI.new( graphite: 'tcp://graphite:2003' )

client.metrics "webServer.web01.loadAvg" => 10.7
# => webServer.web01.loadAvg 10.7 time.now.to_i

client.metrics(
  "webServer.web01.loadAvg"  => 10.7,
  "webServer.web01.memUsage" => 40
)
# => webServer.web01.loadAvg  10.7 1326067060
# => webServer.web01.memUsage 40 1326067060

Adding metrics with timestamp

require 'graphite-api'

client = GraphiteAPI.new( graphite: 'udp://graphite:2003' )

client.metrics({
  "webServer.web01.loadAvg"  => 10.7,
  "webServer.web01.memUsage" => 40
},Time.at(1326067060))
# => webServer.web01.loadAvg  10.7 1326067060
# => webServer.web01.memUsage 40 1326067060

Adding metrics with custom aggregation method

require 'graphite-api'

client = GraphiteAPI.new( graphite: 'udp://graphite:2003' )

client.metrics({
  "webServer.web01.loadAvg"  => 10,
  "webServer.web01.memUsage" => 40
},Time.at(1326067060), :avg)
client.metrics({
  "webServer.web01.loadAvg"  => 20,
  "webServer.web01.memUsage" => 50
},Time.at(1326067060), :avg)
# => webServer.web01.loadAvg  15 1326067060
# => webServer.web01.memUsage 45 1326067060

Verifying connectivity

require 'graphite-api'

client = GraphiteAPI.new graphite: 'udp://UNKNOWN-HOST:1234'
client.check!

# SocketError: udp://UNKNOWN-HOST:1234: getaddrinfo: nodename nor servname provided, or not known

Increment records

require 'graphite-api'

client = GraphiteAPI.new( graphite: 'tcp://graphite:2003' )

client.increment("jobs_in_queue", "num_errors")
# => jobs_in_queue 1 Time.now.to_i
# => num_errors 1 Time.now.to_i

client.increment("jobs_in_queue", "num_errors", by: 999)
# => jobs_in_queue 999 Time.now.to_i
# => num_errors 999 Time.now.to_i

client.increment("jobs_in_queue", "num_errors", by: 20, time: Time.at(123456))
# => jobs_in_queue 20 123456
# => num_errors 20 123456

Built-in timers support

require 'graphite-api'

client = GraphiteAPI.new( graphite: 'tcp://graphite:2003' )

# lets send the metric every 120 seconds
client.every(120) do |c|
  c.metrics("webServer.web01.uptime" => `uptime`.split.first.to_i)
end

Built-in extension for time declarations stuff, like 2.minutes, 3.hours etc...

require 'graphite-api'
require 'graphite-api/core_ext/numeric'

client = GraphiteAPI.new( graphite: 'udp://graphite:2003' )

client.every 10.seconds do |c|
  c.metrics("webServer.web01.uptime" => `uptime`.split.first.to_i)
end

client.every 52.minutes do |c|
  c.metrics("just.fake" => 12)
end

Stopping the client loop

require 'graphite-api'

client = GraphiteAPI.new( graphite: 'tcp://graphite:2003' )

# Lets send the metric every 2 minutes.
client.every(2.minutes) do |c|
  c.metrics("webServer.web01.uptime" => `uptime`.split.first.to_i)
end

sleep 2.minutes # Client will send one message.

client.pause
sleep 6.minutes # Client will not send any messages.

client.resume
sleep 4.minutes # Client will send 2 messages.

client.cancel
client.resume
sleep 6.minutes # After cancel, client will not send any more messages.

Make your own custom metrics daemons, using client#join

require 'graphite-api'
require 'graphite-api/core_ext/numeric'

client = GraphiteAPI.new( graphite: 'udp://graphite:2003' )

client.every 26.minutes do |c|
  c.metrics("webServer.shuki.stats" => 10)
  c.metrics("webServer.shuki.x" => 97)
  c.metrics("webServer.shuki.y" => 121)
end

client.join # wait for ever...

Logger

# Provide an external logger
require 'graphite-api'
require 'logger'

GraphiteAPI::Logger.logger = ::Logger.new(STDOUT)
GraphiteAPI::Logger.logger.level = ::Logger::DEBUG

# Or use the built-in one
GraphiteAPI::Logger.init level: :debug, dev: 'logger.out' # or STDOUT | STDERR

Bugs

If you find a bug, feel free to report it @ our issues tracker on github.

License

It is free software, and may be redistributed under the terms specified in LICENSE.

Warranty

This software is provided “as is” and without any express or implied warranties, including, without limitation, the implied warranties of merchantability and fitness for a particular purpose.