class Bipbip::Plugin::SystemdUnit

Public Instance Methods

metrics_schema() click to toggle source
# File lib/bipbip/plugin/systemd_unit.rb, line 7
def metrics_schema
  [
    { name: 'all_units_active', type: 'gauge', unit: 'Boolean' },
    { name: 'any_unit_failed', type: 'gauge', unit: 'Boolean' },
    { name: 'any_unit_stopped', type: 'gauge', unit: 'Boolean' }
  ]
end
monitor() click to toggle source
# File lib/bipbip/plugin/systemd_unit.rb, line 15
def monitor
  main_unit = config['unit_name']
  failed_units = []
  stopped_units = []
  status_list = unit_dependencies(main_unit).map do |unit|
    is_active = unit_is_active(unit)
    is_failed = unit_is_failed(unit)
    is_stopped = !is_active && !is_failed

    failed_units.push(unit) if is_failed
    stopped_units.push(unit) if is_stopped
    {
      name: unit,
      is_active: is_active,
      is_failed: is_failed,
      is_stopped: is_stopped
    }
  end

  log(Logger::WARN, "#{main_unit} unit failed: #{failed_units.join(', ')}") unless failed_units.empty?
  log(Logger::WARN, "#{main_unit} unit stopped: #{stopped_units.join(', ')}") unless stopped_units.empty?

  {
    'all_units_active' => (status_list.all? { |status| status[:is_active] } ? 1 : 0),
    'any_unit_failed' => (status_list.any? { |status| status[:is_failed] } ? 1 : 0),
    'any_unit_stopped' => (status_list.any? { |status| status[:is_stopped] } ? 1 : 0)
  }
end
unit_dependencies(main_unit) click to toggle source

@param [String] main_unit @return [Array<String>]

# File lib/bipbip/plugin/systemd_unit.rb, line 46
def unit_dependencies(main_unit)
  result = Komenda.run(['systemctl', 'list-dependencies', '--plain', '--full', main_unit], fail_on_fail: true)
  result.stdout.force_encoding('utf-8').lines.map do |line|
    line.strip.gsub(/^[●*]\s+/, '')
  end
end
unit_is_active(unit) click to toggle source

@param [String] unit @return [TrueClass, FalseClass]

# File lib/bipbip/plugin/systemd_unit.rb, line 55
def unit_is_active(unit)
  Komenda.run(['systemctl', 'is-active', unit]).success?
end
unit_is_failed(unit) click to toggle source

@param [String] unit @return [TrueClass, FalseClass]

# File lib/bipbip/plugin/systemd_unit.rb, line 61
def unit_is_failed(unit)
  Komenda.run(['systemctl', 'is-failed', unit]).success?
end