Class: Bosh::Director::ResourcePoolUpdater

Inherits:
Object
  • Object
show all
Defined in:
lib/bosh/director/resource_pool_updater.rb

Instance Method Summary collapse

Constructor Details

#initialize(resource_pool) ⇒ ResourcePoolUpdater

Returns a new instance of ResourcePoolUpdater.



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# File 'lib/bosh/director/resource_pool_updater.rb', line 3

def initialize(resource_pool)
  @resource_pool = resource_pool
  @cloud = Config.cloud
  @logger = Config.logger
  @event_log = Config.event_log
end

Instance Method Details

#bound_missing_vm_count ⇒ Object 



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# File 'lib/bosh/director/resource_pool_updater.rb', line 163

def bound_missing_vm_count
  counter = 0
  @resource_pool.vms.each do |vm|
    next if vm.model
    next if vm.bound_instance.nil?
    counter += 1
  end
  counter
end

#create_bound_missing_vms(thread_pool) ⇒ Object

Creates missing VMs that have bound instances (as opposed to missing resource pool VMs)



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# File 'lib/bosh/director/resource_pool_updater.rb', line 43

def create_bound_missing_vms(thread_pool)
  create_missing_vms(thread_pool) { |vm| !vm.bound_instance.nil? }
end

#create_missing_vm(vm) ⇒ Object 



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# File 'lib/bosh/director/resource_pool_updater.rb', line 47

def create_missing_vm(vm)
  deployment = @resource_pool.deployment_plan.model
  stemcell = @resource_pool.stemcell.model

  vm_model = VmCreator.new.create(deployment, stemcell, @resource_pool.cloud_properties,
                            vm.network_settings, nil, @resource_pool.env)

  agent = AgentClient.with_defaults(vm_model.agent_id)
  agent.wait_until_ready

  update_state(agent, vm_model, vm)

  vm.model = vm_model
  vm.current_state = agent.get_state
rescue Exception => e
  @logger.info("Cleaning up the created VM due to an error: #{e}")
  begin
    @cloud.delete_vm(vm_model.cid) if vm_model && vm_model.cid
    vm_model.destroy if vm_model && vm_model.id
  rescue Exception
    @logger.info("Could not cleanup VM: #{vm_model.cid}") if vm_model
  end
  raise e
end

#create_missing_vms(thread_pool) {|VirtualMachine| ... } ⇒ Object

Creates VMs that are considered missing from the deployment

Parameters:

  • thread_pool (ThreadPool) —

    Thread pool that will be used to parallelize the operation

Yields:

  • (VirtualMachine) —

    filter for which missing VMs to create



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# File 'lib/bosh/director/resource_pool_updater.rb', line 16

def create_missing_vms(thread_pool)
  counter = 0
  vms_to_process = []

  @resource_pool.vms.each do |vm|
    next if vm.model
    if !block_given? || yield(vm)
      counter += 1
      vms_to_process << vm
    end
  end

  @logger.info("Creating #{counter} missing VMs")
  vms_to_process.each_with_index do |vm, index|
    thread_pool.process do
      @event_log.track("#{@resource_pool.name}/#{index}") do
        with_thread_name("create_missing_vm(#{@resource_pool.name}, #{index}/#{counter})") do
          @logger.info("Creating missing VM")
          create_missing_vm(vm)
        end
      end
    end
  end
end

#delete_extra_vms(thread_pool) ⇒ Object

Deletes extra VMs in a resource pool

Parameters:

  • thread_pool —

    Thread pool used to parallelize delete operations



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# File 'lib/bosh/director/resource_pool_updater.rb', line 85

def delete_extra_vms(thread_pool)
  count = @resource_pool.extra_vm_count
  @logger.info("Deleting #{count} extra VMs")

  count.times do
    vm = @resource_pool.idle_vms.shift
    vm_cid = vm.model.cid

    thread_pool.process do
      @event_log.track("#{@resource_pool.name}/#{vm_cid}") do
        @logger.info("Deleting extra VM: #{vm_cid}")
        @cloud.delete_vm(vm_cid)
        vm.model.destroy
      end
    end
  end
end

#delete_outdated_idle_vms(thread_pool) ⇒ Object 



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# File 'lib/bosh/director/resource_pool_updater.rb', line 103

def delete_outdated_idle_vms(thread_pool)
  count = outdated_idle_vm_count
  index = 0
  index_lock = Mutex.new

  @logger.info("Deleting #{count} outdated idle VMs")

  @resource_pool.idle_vms.each do |vm|
    next unless vm.model && vm.changed?
    vm_cid = vm.model.cid

    thread_pool.process do
      @event_log.track("#{@resource_pool.name}/#{vm_cid}") do
        index_lock.synchronize { index += 1 }

        with_thread_name("delete_outdated_vm(#{@resource_pool.name}, #{index - 1}/#{count})") do
          @logger.info("Deleting outdated VM: #{vm_cid}")
          @cloud.delete_vm(vm_cid)
          vm_model = vm.model
          vm.clean_vm
          vm_model.destroy
        end
      end
    end
  end
end

#extra_vm_count ⇒ Object 



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# File 'lib/bosh/director/resource_pool_updater.rb', line 142

def extra_vm_count
  @resource_pool.extra_vm_count
end

#generate_agent_id ⇒ Object 



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# File 'lib/bosh/director/resource_pool_updater.rb', line 138

def generate_agent_id
  SecureRandom.uuid
end

#missing_vm_count ⇒ Object 



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# File 'lib/bosh/director/resource_pool_updater.rb', line 154

def missing_vm_count
  counter = 0
  @resource_pool.vms.each do |vm|
    next if vm.model
    counter += 1
  end
  counter
end

#outdated_idle_vm_count ⇒ Object 



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# File 'lib/bosh/director/resource_pool_updater.rb', line 146

def outdated_idle_vm_count
  counter = 0
  @resource_pool.idle_vms.each do |vm|
    counter += 1 if vm.model && vm.changed?
  end
  counter
end

#reserve_networks ⇒ Object

Attempts to allocate a dynamic IP address for all idle VMs (unless they already have one). This allows us to fail earlier in case any of resource pools is not big enough to accommodate those VMs.



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# File 'lib/bosh/director/resource_pool_updater.rb', line 134

def reserve_networks
  @resource_pool.reserve_dynamic_networks
end

#update_state(agent, vm_model, vm) ⇒ Object 



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# File 'lib/bosh/director/resource_pool_updater.rb', line 72

def update_state(agent, vm_model, vm)
  state = {
      "deployment" => @resource_pool.deployment_plan.name,
      "resource_pool" => @resource_pool.spec,
      "networks" => vm.network_settings
  }

  vm_model.update(:apply_spec => state)
  agent.apply(state)
end