script.example

#!/usr/bin/env ruby

# Copyright © 2009 Johan Kiviniemi
#
# Permission to use, copy, modify, and/or distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

$LOAD_PATH << File.dirname(__FILE__) + '/lib'

begin
  require 'rubygems'
rescue LoadError
  # Ignore.
end

require 'active_support'

require 'rrd/graph'

Dir.chdir File.dirname(__FILE__)

root = "/var/lib/collectd/rrd"

w = 1520
h = 200
line = 2

period = 1.week.to_f

E = RRD::Graph::Expr
#RRD::Logger.instance.level = Logger::DEBUG

RRD::Graph.new w, h, "HDD temperature", "img/hdd-temp.png", "°C", period do |g|
  [
    ["alku sda   ", "heh.fi/hddtemp/temperature-8-0.rrd:value:MAX"],
    ["alku sdb   ", "heh.fi/hddtemp/temperature-8-16.rrd:value:MAX"],
    ["luotain sda", "luotain/hddtemp/temperature-8-0.rrd:value:MAX"],
  ].each do |label, path|
    temp   = E.read "#{root}/#{path}"
    smooth = temp.trend period/48.0

    g.line   line, smooth, label
    g.gprint temp
  end
end

RRD::Graph.new w, h, "Free diskspace", "img/df.png", "B", period do |g|
  [
    ["alku /       ", "heh.fi/df/df-root.rrd:free:MIN"],
    ["alku /home   ", "heh.fi/df/df-home.rrd:free:MIN"],
    ["luotain /    ", "luotain/df/df-root.rrd:free:MIN"],
  ].each do |label, path|
    df = E.read "#{root}/#{path}"

    g.line   line, df, label
    g.gprint df
  end
end

RRD::Graph.new w, h, "Free RAM", "img/mem.png", "B", period do |g|
  [
    ["alku   ", "heh.fi/memory/memory-%s.rrd:value:AVERAGE"],
    ["luotain", "luotain/memory/memory-%s.rrd:value:AVERAGE"],
  ].each do |label, path|
    free     = E.read "#{root}/#{path % 'free'}"
    cached   = E.read "#{root}/#{path % 'cached'}"
    buffered = E.read "#{root}/#{path % 'buffered'}"

    sum = free + cached + buffered

    g.line   line, sum, label
    g.gprint sum
  end
end

RRD::Graph.new w, h, "CPU usage", "img/cpu.png", "%", period do |g|
  [
    ["alku   ", "heh.fi/cpu-0/cpu-idle.rrd:value:AVERAGE"],
    ["luotain", "luotain/cpu-0/cpu-idle.rrd:value:AVERAGE"],
  ].each do |label, path|
    idle    = E.read "#{root}/#{path}"
    working = E.new(100) - idle
    smooth  = working.trend period/144.0

    g.line   line, smooth, label
    g.gprint working
  end
end

RRD::Graph.new w, h, "Time offset", "img/time-offset.png", "s", period do |g|
  [
    ["alku – gw     ", "heh.fi/ntpd/time_offset-10.0.0.1.rrd:seconds:AVERAGE"],
  ].each do |label, path|
    offset = E.read "#{root}/#{path}"
    smooth = offset.trend period/24.0
    abs    = offset.ge(0).if_ offset, E.new(0)-offset

    g.line   line, smooth, label
    g.gprint abs
  end
end

RRD::Graph.new w, h, "Latency", "img/latency.png", "s", period do |g|
  [
    ["alku – dslam", "heh.fi/ping/ping-83.145.237.254.rrd:ping:AVERAGE"],
    ["alku – SONG ", "heh.fi/ping/ping-ntp1.tdc.fi.rrd:ping:AVERAGE"],
  ].each do |label, path|
    ms     = E.read "#{root}/#{path}"
    s      = ms/1000
    smooth = s.trend period/48.0

    g.line   line, smooth, label
    g.gprint s
  end
end

RRD::Graph.new w, h, "Uptime", "img/uptime.png", "day", 1.year.to_f do |g|
  [
    ["alku   ", "heh.fi/exec-uptime/uptime.rrd:seconds:MAX"],
    ["luotain", "luotain/exec-uptime/uptime.rrd:seconds:MAX"],
  ].each do |label, path|
    s    = E.read "#{root}/#{path}"
    days = s/86400.0

    g.line   line, days, label
    g.gprint days
  end
end