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

#planObject (readonly, protected)

Returns the value of attribute plan.



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# File 'lib/osctld/auto_start/plan.rb', line 146

def plan
  @plan
end

#poolObject (readonly)

Returns the value of attribute pool.



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

def pool
  @pool
end

#rebootObject (readonly, protected)

Returns the value of attribute reboot.



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# File 'lib/osctld/auto_start/plan.rb', line 146

def reboot
  @reboot
end

#stateObject (readonly, protected)

Returns the value of attribute state.



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# File 'lib/osctld/auto_start/plan.rb', line 146

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

#clearObject



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# File 'lib/osctld/auto_start/plan.rb', line 128

def clear
  plan.clear
end

#clear_ct(ct) ⇒ Object



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# File 'lib/osctld/auto_start/plan.rb', line 123

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 194

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 148

def do_try_start_ct(ct, attempts: 5, cooldown: 5, start_opts: {})
  attempts.times do |i|
    return 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)
      return 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

      return
    end

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

    if stop?
      log(:warn, ct, "Unable to start the container, giving up to stop")
      return
    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 74

def enqueue(ct, priority: 10, start_opts: {})
  plan << (
    ContinuousExecutor::Command.new(id: ct.id, priority: 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 115

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

#prestart_delay(ct) ⇒ Object (protected)



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# File 'lib/osctld/auto_start/plan.rb', line 188

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

#queueObject



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# File 'lib/osctld/auto_start/plan.rb', line 141

def queue
  plan.queue
end

#request_reboot(ct) ⇒ Object



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# File 'lib/osctld/auto_start/plan.rb', line 111

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

#resize(new_size) ⇒ Object



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# File 'lib/osctld/auto_start/plan.rb', line 132

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, pool,
    "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

  # Preschedule the containers
  if CpuScheduler.use?
    cts.reject do |ct|
      ct.running?
    end.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
  plan << (cts.map do |ct|
    ContinuousExecutor::Command.new(
      id: ct.id,
      priority: 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 90

def start_ct(ct, priority: 10, start_opts: {}, client_handler: nil)
  plan.execute(
    ContinuousExecutor::Command.new(id: ct.id, priority: 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

#stopObject



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# File 'lib/osctld/auto_start/plan.rb', line 136

def stop
  @stop = true
  plan.stop
end

#stop?Boolean (protected)

Returns:

  • (Boolean)


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# File 'lib/osctld/auto_start/plan.rb', line 199

def stop?
  @stop
end

#stop_ct(ct) ⇒ Object



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# File 'lib/osctld/auto_start/plan.rb', line 119

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