class Riemann::Tools::Fd

Public Class Methods

new() click to toggle source
Calls superclass method Riemann::Tools::new
# File lib/riemann/tools/fd.rb, line 18
def initialize
  super

  @limits = {
    fd: { critical: opts[:fd_sys_critical], warning: opts[:fd_sys_warning] },
    process: { critical: opts[:fd_proc_critical], warning: opts[:fd_proc_warning] },
  }
  ostype = `uname -s`.chomp.downcase
  case ostype
  when 'freebsd'
    @fd = method :freebsd_fd
  else
    puts "WARNING: OS '#{ostype}' not explicitly supported. Falling back to Linux" unless ostype == 'linux'
    @fd = method :linux_fd
  end
end

Public Instance Methods

alert(service, state, metric, description) click to toggle source
# File lib/riemann/tools/fd.rb, line 35
def alert(service, state, metric, description)
  report(
    service: service.to_s,
    state: state.to_s,
    metric: metric.to_f,
    description: description,
  )
end
freebsd_fd() click to toggle source
# File lib/riemann/tools/fd.rb, line 44
def freebsd_fd
  sys_used = Integer(`sysctl -n kern.openfiles`)
  if sys_used > @limits[:fd][:critical]
    alert 'fd sys', :critical, sys_used, "system is using #{sys_used} fds"
  elsif sys_used > @limits[:fd][:warning]
    alert 'fd sys', :warning, sys_used, "system is using #{sys_used} fds"
  else
    alert 'fd sys', :ok, sys_used, "system is using #{sys_used} fds"
  end
end
linux_fd() click to toggle source
# File lib/riemann/tools/fd.rb, line 55
def linux_fd
  sys_used = Integer(`lsof | wc -l`)
  if sys_used > @limits[:fd][:critical]
    alert 'fd sys', :critical, sys_used, "system is using #{sys_used} fds"
  elsif sys_used > @limits[:fd][:warning]
    alert 'fd sys', :warning, sys_used, "system is using #{sys_used} fds"
  else
    alert 'fd sys', :ok, sys_used, "system is using #{sys_used} fds"
  end

  opts[:processes]&.each do |process|
    used = Integer(`lsof -p #{process} | wc -l`)
    name, _pid = `ps axo comm,pid | grep -w #{process}`.split
    if used > @limits[:process][:critical]
      alert "fd #{name} #{process}", :critical, used, "process #{name} #{process} is using #{used} fds"
    elsif used > @limits[:process][:warning]
      alert "fd #{name} #{process}", :warning, used, "process #{name} #{process} is using #{used} fds"
    else
      alert "fd #{name} #{process}", :ok, used, "process #{name} #{process} is using #{used} fds"
    end
  end
end
tick() click to toggle source
# File lib/riemann/tools/fd.rb, line 78
def tick
  @fd.call
end