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module Orchestration::DHCP
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def self.included(base)
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base.send :include, InstanceMethods
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base.class_eval do
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after_validation :queue_dhcp
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before_destroy :queue_dhcp_destroy
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validate :ip_belongs_to_subnet?, :valid_jumpstart_model
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end
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end
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module InstanceMethods
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def dhcp?
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!subnet.nil? and subnet.dhcp? and errors.empty?
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end
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def sp_dhcp?
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!sp_subnet.nil? and sp_subnet.dhcp? and errors.empty?
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end
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def dhcp_record
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return unless dhcp?
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@dhcp_record ||= jumpstart? ? Net::DHCP::SparcRecord.new(dhcp_attrs) : Net::DHCP::Record.new(dhcp_attrs)
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end
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def sp_dhcp_record
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return unless sp_dhcp?
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@sp_dhcp_record ||= Net::DHCP::Record.new sp_dhcp_attrs
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end
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protected
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def set_dhcp
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dhcp_record.create
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end
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def set_sp_dhcp
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sp_dhcp_record.create
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end
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def del_dhcp
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dhcp_record.destroy
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end
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def del_sp_dhcp
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sp_dhcp_record.destroy
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end
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private
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# returns a hash of dhcp record settings
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def dhcp_attrs
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return unless dhcp?
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dhcp_attr = { :name => name, :filename => operatingsystem.boot_filename(self),
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:ip => ip, :mac => mac, :hostname => name, :proxy => proxy_for_host,
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:network => subnet.network, :nextServer => boot_server }
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if jumpstart?
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jumpstart_arguments = os.jumpstart_params self, model.vendor_class
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dhcp_attr.merge! jumpstart_arguments unless jumpstart_arguments.empty?
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end
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dhcp_attr
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end
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# returns a hash of service processor / ilo dhcp record settings
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def sp_dhcp_attrs
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return unless sp_dhcp?
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{ :name => sp_name, :ip => sp_ip, :mac => sp_mac, :proxy => proxy_for_sp, :network => sp_subnet.network }
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end
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# where are we booting from
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def boot_server
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# if we don't manage tftp at all, we dont create a next-server entry.
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return unless tftp?
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bs = tftp.bootServer
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if bs.blank?
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# trying to guess out tftp next server based on the smart proxy hostname
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bs = URI.parse(subnet.tftp.url).host if respond_to?(:tftp?) and tftp?
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end
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return bs unless bs.blank?
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failure "Unable to determine the host's boot server. The DHCP smart proxy failed to provide this information and this subnet is not provided with TFTP services."
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rescue => e
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failure "failed to detect boot server: #{e}"
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end
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def queue_dhcp
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return unless dhcp? and errors.empty?
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new_record? ? queue_dhcp_create : queue_dhcp_update
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end
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def queue_dhcp_create
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queue.create(:name => "DHCP Settings for #{self}", :priority => 10,
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:action => [self, :set_dhcp])
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queue.create(:name => "DHCP Settings for #{sp_name}", :priority => 15,
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:action => [self, :set_sp_dhcp]) if sp_dhcp?
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end
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def queue_dhcp_update
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queue.create(:name => "DHCP Settings for #{old}", :priority => 5,
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:action => [old, :del_dhcp]) if old.dhcp? and dhcp_update_required?
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queue.create(:name => "DHCP Settings for #{old.sp_name}", :priority => 5,
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:action => [old, :del_sp_dhcp]) if old.sp_dhcp? and sp_dhcp_update_required?
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queue_dhcp_create if dhcp_update_required?
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end
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# do we need to update our dhcp reservations
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def dhcp_update_required?
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# IP Address / name changed
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return true if (old.ip != ip) or (old.name != name) or (old.mac != mac)
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# Handle jumpstart
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if jumpstart?
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if !old.build? or (old.medium != medium or old.arch != arch) or
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(os and old.os and (old.os.name != os.name or old.os != os))
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return true
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end
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end
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false
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end
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def sp_dhcp_update_required?
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return true if old.sp_valid? and ((old.sp_name != sp_name) or (old.sp_mac != sp_mac) or (old.sp_ip != sp_ip))
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false
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end
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def queue_dhcp_destroy
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return unless dhcp? and errors.empty?
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queue.create(:name => "DHCP Settings for #{self}", :priority => 5,
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:action => [self, :del_dhcp])
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queue.create(:name => "DHCP Settings for #{sp_name}", :priority => 5,
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:action => [self, :del_sp_dhcp]) if sp_valid?
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true
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end
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def ip_belongs_to_subnet?
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return if subnet.nil? or ip.nil?
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return unless dhcp?
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unless subnet.contains? ip
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errors.add :ip, "Does not match selected Subnet"
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return false
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end
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rescue
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# probably an invalid ip / subnet were entered
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# we let other validations handle that
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end
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def valid_jumpstart_model
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return unless jumpstart?
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errors.add :model, "Has an unknown vendor class" if model.vendor_class.empty?
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false
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end
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def proxy_for_host
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subnet.dhcp_proxy
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end
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def proxy_for_sp
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sp_subnet.dhcp_proxy
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end
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end
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end
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