class Bosh::AwsCloud::AvailabilityZoneSelector

Attributes

region[RW]

Public Class Methods

new(region, default_name) click to toggle source
# File lib/cloud/aws/availability_zone_selector.rb, line 5
def initialize(region, default_name)
  @region = region
  @default = default_name
end

Public Instance Methods

common_availability_zone(volume_az_names, resource_pool_az_name, vpc_subnet_az_name) click to toggle source
# File lib/cloud/aws/availability_zone_selector.rb, line 10
def common_availability_zone(volume_az_names, resource_pool_az_name, vpc_subnet_az_name)
  zone_names = (volume_az_names + [resource_pool_az_name, vpc_subnet_az_name]).compact.uniq
  if zone_names.size > 1
    volume_az_error_string = ", and volume in #{volume_az_names.join(', ')}" unless volume_az_names.empty?
    raise Bosh::Clouds::CloudError, "can't use multiple availability zones: subnet in #{vpc_subnet_az_name}, VM in #{resource_pool_az_name}#{volume_az_error_string}"
  end

  zone_names.first || @default
end
select_availability_zone(instance_id) click to toggle source
# File lib/cloud/aws/availability_zone_selector.rb, line 20
def select_availability_zone(instance_id)
  if instance_id
    region.instances[instance_id].availability_zone
  elsif @default
    @default
  else
    random_availability_zone
  end
end

Private Instance Methods

random_availability_zone() click to toggle source
# File lib/cloud/aws/availability_zone_selector.rb, line 32
def random_availability_zone
  zones = []
  region.availability_zones.each { |zone| zones << zone.name }
  zones[Random.rand(zones.size)]
end