Class: Riemann::Tools::Proc

Inherits:
Object
  • Object
show all
Includes:
Riemann::Tools
Defined in:
lib/riemann/tools/proc.rb

Constant Summary

Constants included from Riemann::Tools

VERSION

Instance Attribute Summary

Attributes included from Riemann::Tools

#argv

Instance Method Summary collapse

Methods included from Riemann::Tools

#attributes, #endpoint_name, included, #options, #report, #riemann, #run

Constructor Details

#initialize ⇒ Proc

Returns a new instance of Proc.



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# File 'lib/riemann/tools/proc.rb', line 15

def initialize
  super

  @limits = { critical: { min: opts[:proc_min_critical], max: opts[:proc_max_critical] } }

  abort 'FATAL: specify a process regular expression, see --help for usage' unless opts[:proc_regex]

  ostype = `uname -s`.chomp.downcase
  puts "WARNING: OS '#{ostype}' not explicitly supported. Falling back to Linux" unless ostype == 'linux'
  @check = method :linux_proc
end

Instance Method Details

#alert(service, state, metric, description) ⇒ Object 



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# File 'lib/riemann/tools/proc.rb', line 27

def alert(service, state, metric, description)
  report(
    service: service.to_s,
    state: state.to_s,
    metric: metric.to_f,
    description: description,
  )
end

#linux_proc ⇒ Object 



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# File 'lib/riemann/tools/proc.rb', line 36

def linux_proc
  process = opts[:proc_regex]
  found = `ps axo pid=,rss=,vsize=,state=,cputime=,lstart=,command= | grep '#{process}' | grep -v grep | grep -v riemann-proc`
  running = found.count("\n")
  if (running > @limits[:critical][:max]) || (running < @limits[:critical][:min])
    alert "proc count/#{process}", :critical, running, "process #{process} is running #{running} instances.\n"
  else
    alert "proc count/#{process}", :ok, running, "process #{process} is running #{running} instances.\n"
  end
  # Iterate on all the lines and create an entry for the following metrics:
  #
  # process/<pid>-<start-time>/rss
  # process/<pid>-<start-time>/vsize
  # process/<pid>-<start-time>/running
  # process/<pid>-<start-time>/cputime
  #
  # description should contain the command itself.
  # value should be either process RSS, VSIZE, or 1 if running
  # state is always unknown for the moment
  #
  ps_regex = /([0-9]+) +([0-9]+) +([0-9]+) +([A-Z]) +([0-9:.]+) +[A-Za-z]{3} +([A-Za-z]{3} {1,2}[0-9]+ [0-9:]+ [0-9]+) +(.*)/
  found.each_line do |line|
    m = ps_regex.match(line)
    next if m.nil?

    pid, rss, vsize, state, cputime, start, command = m.captures
    start_s = DateTime.parse(start, 'Mmm DD HH:MM:ss YYYY').to_time.to_i
    cputime_s = DateTime.parse(cputime, '%H:%M:%S')
    cputime_seconds = (cputime_s.hour * 3600) + (cputime_s.minute * 60) + cputime_s.second
    running = 0
    case state[0]
    when 'R'
      state_s = 'ok'
      running = 1
    when 'S'
      state_s = 'ok'
    when 'I'
      state_s = 'warning'
    when 'T', 'U', 'Z'
      state_s = 'critical'
    else
      state_s = 'unknown'
    end
    report(
      service: "proc #{pid}-#{start_s}/rss",
      state: state_s.to_s,
      metric: rss.to_f,
      description: command,
    )
    report(
      service: "proc #{pid}-#{start_s}/vsize",
      state: state_s.to_s,
      metric: vsize.to_f,
      description: command,
    )
    report(
      service: "proc #{pid}-#{start_s}/running",
      state: state_s.to_s,
      metric: running.to_f,
      description: command,
    )
    report(
      service: "proc #{pid}-#{start_s}/cputime",
      state: state_s.to_s,
      metric: cputime_seconds,
      description: command,
    )
  end
end

#tick ⇒ Object 



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# File 'lib/riemann/tools/proc.rb', line 106

def tick
  @check.call
end