A simple and dirty parser for Heroku Logplex. Not well tested.

hlog

#!/usr/bin/env ruby
# -*- encoding: utf-8 -*-

require 'terminal-table'
require 'json'

#
# USAGE: `ruby log.rb [HEROKU_APP_NAME]`
#

app = ARGV[0]
rows = `heroku logs -a #{app} -s heroku -n 200`.split("\n")
$log = Array.new

rows.each do |row|
  title = row.split(" ")[0..1].join(" ")
  next unless title.include?("heroku[web") # We only want logplex entries for web dynos for now.
  hash = Hash[:title, title]
  words = row.split(" ")[2..-1]
  words.each do |word|
    split_word = word.split("=")
    hash.merge!(split_word[0] => split_word[1])
  end
  $log << hash
end

def get_range(array)
  range = array.max - array.min
  range.round(2)
end

def get_avg(array)
  avg = array.inject{ |sum, el| sum + el }.to_f / array.size
  avg.round(2)
end

def memories
  memories = Array.new
  $log.each do |entry|
    next unless entry["sample#memory_total"]
    memories << entry["sample#memory_total"][0..-3].to_f
  end
  memories
end

def load_average
  avgs = Hash.new
  $log.each do |entry|
    next unless entry["sample#load_avg_1m"]
    avgs.merge!("1m" => entry["sample#load_avg_1m"])
    avgs.merge!("5m" => entry["sample#load_avg_5m"])
    avgs.merge!("15m" => entry["sample#load_avg_15m"])
  end
  avgs
end

rows = []
rows << ['Memory', memories[-1]]
rows << ['Average Memory', get_avg(memories)]
rows << ['Memory Range', get_range(memories)]
rows << ['Load Avg 1m', load_average["1m"]]
rows << ['Load Avg 5m', load_average["5m"]]
rows << ['Load Avg 15m', load_average["15m"]]
rows << ['Data Points', $log.length]
table = Terminal::Table.new(rows: rows, title: app)

puts table

log.rb

require 'terminal-table'
require 'json'

#
# USAGE: `ruby log.rb [HEROKU_APP_NAME]`
#

app = ARGV[0]
rows = `heroku logs -a #{app}`.split("\n")
LOG = Array.new

rows.each do |row|
  title = row.split(" ")[0..1].join(" ")
  next unless title.include?("heroku[web") # We only want logplex entries for web dynos for now.
  hash = Hash[:title, title]
  words = row.split(" ")[2..-1]
  words.each do |word|
    split_word = word.split("=")
    hash.merge!(split_word[0] => split_word[1])
  end
  LOG << hash
end

def get_range(array)
  range = array.max - array.min
  range.round(2)
end

def get_avg(array)
  avg = array.inject{ |sum, el| sum + el }.to_f / array.size
  avg.round(2)
end

def memories
  memories = Array.new
  LOG.each do |entry|
    next unless entry["sample#memory_total"]
    memories << entry["sample#memory_total"][0..-3].to_f
  end
  memories
end

def load_average
  avgs = Hash.new
  LOG.each do |entry|
    next unless entry["sample#load_avg_1m"]
    avgs.merge!("1m" => entry["sample#load_avg_1m"])
    avgs.merge!("5m" => entry["sample#load_avg_5m"])
    avgs.merge!("15m" => entry["sample#load_avg_15m"])
  end
  avgs
end

rows = []
rows << ['Average Memory', get_avg(memories)]
rows << ['Memory Range', get_range(memories)]
rows << ['Load Avg 1m', load_average["1m"]]
rows << ['Load Avg 5m', load_average["5m"]]
rows << ['Load Avg 15m', load_average["15m"]]
rows << ['Data Points', LOG.length]
table = Terminal::Table.new(rows: rows, title: app)

puts table