Class: NewrelicSphinx::Agent

Inherits:
Object
  • Object
show all
Defined in:
lib/newrelic_sphinx/agent.rb

Instance Method Summary collapse

Constructor Details

#initialize(configuration = {}) ⇒ Agent

Returns a new instance of Agent.



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# File 'lib/newrelic_sphinx/agent.rb', line 31

def initialize(configuration = {})
  # If you use localhost, MySQL insists on a socket connection, but Sphinx
  # requires a TCP connection. Using 127.0.0.1 fixes that.
  address = configuration[:host] || '127.0.0.1'
  address = '127.0.0.1' if address == 'localhost'

  options = {
    :host      => address,
    :port      => configuration[:port] || 9306,
    :username  => "root",
    :reconnect => true
  }

  @verbose = !! configuration[:verbose]
  @client = Mysql2::Client.new(options)
  @license_key = configuration[:license_key]
  @host = configuration[:hostname] || `hostname`
  @endpoint = configuration[:endpoint] || "https://platform-api.newrelic.com/platform/v1/metrics"
  @frequenzy = configuration[:frequenzy] || 20
  @component_name = 'Sphinx Stats'
  @component_guid = 'com.github.troelskn.Sphinx'
  @version = '0.0.1'
  @metrics = []
  @metrics << Metric.new("avg_query_wall", "avg/Avg Query Wall Time", "milisecond", :plain)
  @metrics << Metric.new("queries", "general/Queries", "Queries/second", :incremental)
  @metrics << Metric.new("connections", "general/Connections", "connections/second", :incremental)
  @metrics << Metric.new("maxed_out", "error/Maxed out connections", "connections/second", :incremental)
  @metrics << Metric.new("command_search", "commands/Command search", "command/second", :incremental)
  @metrics << Metric.new("command_excerpt", "commands/Command excerpt", "command/second", :incremental)
  @metrics << Metric.new("command_update", "commands/Command update", "command/second", :incremental)
  @metrics << Metric.new("command_keywords", "commands/Command keywords", "command/second", :incremental)
  @metrics << Metric.new("command_persist", "commands/Command persist", "command/second", :incremental)
  @metrics << Metric.new("command_flushattrs", "commands/Command flushattrs", "command/second", :incremental)
end

Instance Method Details

#build_metrics ⇒ Object 



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# File 'lib/newrelic_sphinx/agent.rb', line 143

def build_metrics
  update_metrics
  struct = {}
  @metrics.each do |m|
    raise "Missing metric #{m.name}" if m.value.nil?
    if m.incremental?
      struct["Component/#{m.name}[#{m.units}]"] = m.value - m.last_value
    else
      struct["Component/#{m.name}[#{m.units}]"] = m.value
    end
  end
  struct
end

#execute ⇒ Object 



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# File 'lib/newrelic_sphinx/agent.rb', line 75

def execute
  puts "*** execute" if @verbose
  send_stats(build_metrics) if since_last > @frequenzy
end

#run ⇒ Object 



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# File 'lib/newrelic_sphinx/agent.rb', line 66

def run
  update_metrics
  @last = Time.now
  while true
    execute
    sleep 1
  end
end

#send_stats(metrics) ⇒ Object 



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# File 'lib/newrelic_sphinx/agent.rb', line 84

def send_stats(metrics)
  puts "*** send_stats" if @verbose
  data = {
    'agent' => {
      'host' => @host,
      'version' => @version,
    },
    'components' => [
      {
        'name' => @component_name,
        'guid' => @component_guid,
        'duration' => since_last.round,
        'metrics' => metrics
      }
    ]
  }
  uri = URI.parse(@endpoint)
  request = Net::HTTP::Post.new(uri.request_uri)
  request.body = JSON.pretty_generate(data)
  request["Content-Type"] = "application/json"
  request["Accept"] = "application/json"
  request["X-License-Key"] = @license_key
  http = Net::HTTP.new(uri.hostname, uri.port)
  if uri.scheme == 'https'
    http.use_ssl = true
    http.verify_mode = OpenSSL::SSL::VERIFY_NONE
  end
  http.set_debug_output $stderr if @verbose
  response = http.start do |http|
    http.request(request)
  end
  update_state if response.kind_of? Net::HTTPSuccess
end

#since_last ⇒ Object 



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# File 'lib/newrelic_sphinx/agent.rb', line 80

def since_last
  Time.now - @last
end

#update_metrics ⇒ Object 



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# File 'lib/newrelic_sphinx/agent.rb', line 125

def update_metrics
  data_source = {}
  @client.query("show status").each do |row|
    key = row.values[0]
    value = row.values[1]
    if value == "OFF"
      data_source[key] = nil
    elsif value =~ /^\d+$/
      data_source[key] = value.to_i
    else
      data_source[key] = value.to_f
    end
  end
  @metrics.each do |m|
    m.value = data_source[m.key]
  end
end

#update_state ⇒ Object 



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# File 'lib/newrelic_sphinx/agent.rb', line 118

def update_state
  @last = Time.now
  @metrics.each do |m|
    m.memorize if m.incremental?
  end
end