Class: OsCtld::AutoStart::Plan

Inherits:
Object
  • Object
show all
Includes:
OsCtl::Lib::Utils::Log
Defined in:
lib/osctld/auto_start/plan.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(pool) ⇒ Plan

Returns a new instance of Plan.



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# File 'lib/osctld/auto_start/plan.rb', line 10

def initialize(pool)
  @pool = pool
  @plan = ContinuousExecutor.new(pool.parallel_start)
  @state = AutoStart::State.load(pool)
  @reboot = AutoStart::Reboot.load(pool)
  @stop = false
  @nproc = Etc.nprocessors
end

Instance Attribute Details

#plan ⇒ Object (readonly, protected)

Returns the value of attribute plan.



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# File 'lib/osctld/auto_start/plan.rb', line 208

def plan
  @plan
end

#pool ⇒ Object (readonly)

Returns the value of attribute pool.



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# File 'lib/osctld/auto_start/plan.rb', line 8

def pool
  @pool
end

#reboot ⇒ Object (readonly, protected)

Returns the value of attribute reboot.



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# File 'lib/osctld/auto_start/plan.rb', line 208

def reboot
  @reboot
end

#state ⇒ Object (readonly, protected)

Returns the value of attribute state.



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# File 'lib/osctld/auto_start/plan.rb', line 208

def state
  @state
end

Instance Method Details

#assets(add) ⇒ Object 



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# File 'lib/osctld/auto_start/plan.rb', line 19

def assets(add)
  state.assets(add)
  reboot.assets(add)
end

#clear ⇒ Object 



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# File 'lib/osctld/auto_start/plan.rb', line 181

def clear
  plan.clear
end

#clear_ct(ct) ⇒ Object 



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# File 'lib/osctld/auto_start/plan.rb', line 176

def clear_ct(ct)
  state.clear(ct)
  reboot.clear(ct)
end

#delay_after_start? ⇒ Boolean (protected)

Returns:

  • (Boolean) 


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# File 'lib/osctld/auto_start/plan.rb', line 256

def delay_after_start?
  lavg = OsCtl::Lib::LoadAvg.new
  lavg.avg[1] >= @nproc
end

#do_try_start_ct(ct, attempts: 5, cooldown: 5, start_opts: {}) ⇒ Object (protected) 



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# File 'lib/osctld/auto_start/plan.rb', line 210

def do_try_start_ct(ct, attempts: 5, cooldown: 5, start_opts: {})
  attempts.times do |i|
    break if stop?

    ret = Commands::Container::Start.run(**start_opts.merge(
      pool: ct.pool.name,
      id: ct.id,
      wait: 'infinity'
    ))

    if ret[:status]
      state.set_started(ct)
      break if stop?

      if delay_after_start?
        log(:info, ct, "Autostart delay for #{ct.autostart.delay} seconds")
        sleep(ct.autostart.delay)
      else
        log(:info, ct, 'Skipping autostart delay thanks to low system load average')
      end

      break
    end

    if i + 1 == attempts
      log(:warn, ct, 'All attempts to start the container have failed')
      break
    end

    if stop?
      log(:warn, ct, 'Unable to start the container, giving up to stop')
      break
    else
      pause = cooldown + (i * cooldown)
      log(:warn, ct, "Unable to start the container, retrying in #{pause} seconds")
      sleep(pause)
    end
  end
end

#enqueue(ct, priority: 10, start_opts: {}) ⇒ Object 



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# File 'lib/osctld/auto_start/plan.rb', line 127

def enqueue(ct, priority: 10, start_opts: {})
  plan << (
    ContinuousExecutor::Command.new(id: ct.id, priority:) do |cmd|
      cur_ct = DB::Containers.find(cmd.id, pool)
      next if cur_ct.nil? || cur_ct.running?

      prestart_delay(cur_ct)
      log(:info, ct, 'Starting enqueued container')
      do_try_start_ct(
        cur_ct,
        start_opts: start_opts.merge(queue: false)
      )
    end
  )
end

#fulfil_reboot(ct) ⇒ Object 



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# File 'lib/osctld/auto_start/plan.rb', line 168

def fulfil_reboot(ct)
  reboot.clear(ct)
end

#log_type ⇒ Object 



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# File 'lib/osctld/auto_start/plan.rb', line 202

def log_type
  "#{pool.name}:auto-start"
end

#prestart_delay(ct) ⇒ Object (protected) 



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# File 'lib/osctld/auto_start/plan.rb', line 250

def prestart_delay(ct)
  delay = rand(0.0..3.0)
  log(:info, ct, "Delaying auto-start by #{delay.round(2)}s")
  sleep(delay)
end

#queue ⇒ Object 



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# File 'lib/osctld/auto_start/plan.rb', line 198

def queue
  plan.queue
end

#request_reboot(ct) ⇒ Object 



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# File 'lib/osctld/auto_start/plan.rb', line 164

def request_reboot(ct)
  reboot.add(ct)
end

#resize(new_size) ⇒ Object 



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# File 'lib/osctld/auto_start/plan.rb', line 185

def resize(new_size)
  plan.resize(new_size)
end

#start(force: false) ⇒ Object 



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# File 'lib/osctld/auto_start/plan.rb', line 24

def start(force: false)
  @stop = false

  log(
    :info,
    "Auto-starting containers, #{pool.parallel_start} containers at a time"
  )

  # Select containers for autostart
  cts = DB::Containers.get.select do |ct|
    next(false) if ct.pool != pool
    next(true) if reboot.include?(ct) && ct.can_start?
    next(true) if ct.autostart && ct.can_start? && (force || !state.is_started?(ct))

    next(false)
  end

  log(:info, "#{cts.size} containers to start")

  # Preschedule the containers
  if CpuScheduler.use?
    cts.reject(&:running?).sort do |a, b|
      b.hints.cpu_daily.usage_us <=> a.hints.cpu_daily.usage_us
    end.each do |ct|
      CpuScheduler.preschedule_ct(ct)
    end
  end

  # Start the containers
  #
  # If the CPU scheduler is in use, we want to start containers from the
  # first CPU package first. {CpuScheduler.preschedule_ct} already put
  # prioritized containers to the first package.
  start_cts =
    if CpuScheduler.use_sequential_start_stop?
      log(:info, 'Using sequential auto-start')

      cts.sort do |a, b|
        a_package = CpuScheduler.get_preschedule_package_id(a)
        b_package = CpuScheduler.get_preschedule_package_id(b)

        # Start containers with a CPU package first
        if a_package && !b_package
          -1
        elsif !a_package && b_package
          1

        # Neither container has CPU package, sort by start priority
        elsif !a_package && !b_package
          a.autostart <=> b.autostart

        # Same CPU package, sort by start priority
        elsif a_package == b_package # rubocop:disable Lint/DuplicateBranch
          a.autostart <=> b.autostart

        # Sort by CPU package, lower package first
        else
          a_package <=> b_package
        end
      end.each_with_index
    else
      log(:info, 'Using priority auto-start')
      cts
    end

  debug = Daemon.get.config.debug?

  if debug
    counter = 1 # we cannot use i, because it is used only for sequential auto-start
    total = start_cts.size
  end

  plan << (start_cts.map do |ct, i|
    if debug
      log(
        :debug,
        "[#{counter.to_s.rjust(4)}/#{total}] #{ct.id} priority=#{ct.autostart.priority} cpu-package=#{CpuScheduler.get_preschedule_package_id(ct) || '-'}"
      )
      counter += 1
    end

    ContinuousExecutor::Command.new(
      id: ct.id,
      priority: i || ct.autostart.priority
    ) do |cmd|
      cur_ct = DB::Containers.find(cmd.id, pool)

      if cur_ct.nil? || !cur_ct.can_start?
        CpuScheduler.cancel_preschedule_ct(ct)
        next
      elsif cur_ct.running?
        CpuScheduler.cancel_preschedule_ct(ct)
        state.set_started(cur_ct)
        next
      end

      prestart_delay(cur_ct)
      log(:info, cur_ct, 'Auto-starting container')
      do_try_start_ct(cur_ct)
    end
  end)
end

#start_ct(ct, priority: 10, start_opts: {}, client_handler: nil) ⇒ Object 



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# File 'lib/osctld/auto_start/plan.rb', line 143

def start_ct(ct, priority: 10, start_opts: {}, client_handler: nil)
  plan.execute(
    ContinuousExecutor::Command.new(id: ct.id, priority:) do |cmd|
      cur_ct = DB::Containers.find(cmd.id, pool)
      next if cur_ct.nil? || cur_ct.running?

      prestart_delay(cur_ct)
      log(:info, ct, 'Starting enqueued container')
      Commands::Container::Start.run(
        **start_opts.merge(
          pool: cur_ct.pool.name,
          id: cur_ct.id,
          queue: false,
          internal: { handler: client_handler }
        )
      )
    end,
    timeout: start_opts ? (start_opts[:wait] || Container::DEFAULT_START_TIMEOUT) : nil
  )
end

#started? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/osctld/auto_start/plan.rb', line 194

def started?
  !@stop
end

#stop ⇒ Object 



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# File 'lib/osctld/auto_start/plan.rb', line 189

def stop
  @stop = true
  plan.stop
end

#stop? ⇒ Boolean (protected)

Returns:

  • (Boolean) 


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# File 'lib/osctld/auto_start/plan.rb', line 261

def stop?
  @stop
end

#stop_ct(ct) ⇒ Object 



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# File 'lib/osctld/auto_start/plan.rb', line 172

def stop_ct(ct)
  plan.remove(ct.id)
end