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module Orchestration::DHCP
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extend ActiveSupport::Concern
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included do
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after_validation :dhcp_conflict_detected?, :queue_dhcp
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before_destroy :queue_dhcp_destroy
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validate :ip_belongs_to_subnet?
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register_rebuild(:rebuild_dhcp, N_('DHCP'))
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end
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def dhcp?
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# host.managed? and managed? should always come first so that orchestration doesn't
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# even get tested for such objects
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(host.nil? || host.managed?) && managed? && hostname.present? && ip_available? && mac_available? &&
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!subnet.nil? && subnet.dhcp? && SETTINGS[:unattended] && (!provision? || operatingsystem.present?)
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end
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def dhcp_record
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return unless dhcp? or @dhcp_record
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@dhcp_record ||= (provision? && jumpstart?) ? Net::DHCP::SparcRecord.new(dhcp_attrs) : Net::DHCP::Record.new(dhcp_attrs)
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end
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def rebuild_dhcp
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if dhcp?
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del_dhcp_safe
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begin
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set_dhcp
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rescue => e
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Foreman::Logging.exception "Failed to rebuild DHCP record for #{name}, #{ip}", e, :level => :error
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false
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end
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else
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logger.info "DHCP not supported for #{name}, #{ip}, skipping orchestration rebuild"
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true
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end
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end
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protected
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def del_dhcp_safe
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if dhcp_record
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begin
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del_dhcp
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rescue => e
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Foreman::Logging.exception "Proxy failed to delete DHCP record for #{name}, #{ip}", e, :level => :error
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end
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end
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end
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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_dhcp_conflicts
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dhcp_record.conflicts.each{|conflict| conflict.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_dhcp_conflicts
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dhcp_record.conflicts.each{|conflict| conflict.destroy}
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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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# first try to ask our TFTP server for its boot server
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bs = tftp.bootServer
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# if that failed, trying to guess out tftp next server based on the smart proxy hostname
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bs ||= URI.parse(subnet.tftp.url).host
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# now convert it into an ip address (see http://theforeman.org/issues/show/1381)
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ip = to_ip_address(bs) if bs.present?
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return ip unless ip.nil?
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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: %s") % e, e
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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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raise ::Foreman::Exception.new(N_("DHCP not supported for this NIC")) unless dhcp?
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dhcp_attr = {
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:name => name,
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:hostname => hostname,
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:ip => ip,
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:mac => mac,
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:proxy => subnet.dhcp_proxy,
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:network => subnet.network,
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}
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if provision?
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dhcp_attr.merge!({:filename => operatingsystem.boot_filename(self), :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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end
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dhcp_attr
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end
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def queue_dhcp
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return unless (dhcp? or (old and old.dhcp?)) and orchestration_errors?
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queue_remove_dhcp_conflicts
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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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logger.debug "Scheduling new DHCP reservations for #{self}"
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queue.create(:name => _("Create DHCP Settings for %s") % self, :priority => 10,
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:action => [self, :set_dhcp]) if dhcp?
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end
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def queue_dhcp_update
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if dhcp_update_required?
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logger.debug("Detected a changed required for DHCP record")
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queue.create(:name => _("Remove DHCP Settings for %s") % old, :priority => 5,
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:action => [old, :del_dhcp]) if old.dhcp?
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queue.create(:name => _("Create DHCP Settings for %s") % self, :priority => 9,
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:action => [self, :set_dhcp]) if dhcp?
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end
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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, or 'rebuild' action is triggered and DHCP record on the smart proxy is not present/identical.
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return true if ((old.ip != ip) or (old.hostname != hostname) or (old.mac != mac) or (old.subnet != subnet) or
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(!old.build? and build? and !dhcp_record.valid?))
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# Handle jumpstart
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#TODO, abstract this way once interfaces are fully used
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if self.is_a?(Host::Base) and 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 queue_dhcp_destroy
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return unless dhcp? and errors.empty?
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queue.create(:name => _("Remove DHCP Settings for %s") % self, :priority => 5,
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:action => [self, :del_dhcp])
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true
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end
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def queue_remove_dhcp_conflicts
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return unless (dhcp? and overwrite?)
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logger.debug "Scheduling DHCP conflicts removal"
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queue.create(:name => _("DHCP conflicts removal for %s") % self, :priority => 5,
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:action => [self, :del_dhcp_conflicts]) if dhcp_record and dhcp_record.conflicting?
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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 dhcp_conflict_detected?
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# we can't do any dhcp based validations when our MAC address is defined afterwards (e.g. in vm creation)
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return false if mac.blank? or hostname.blank?
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return false unless dhcp?
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if dhcp_record and dhcp_record.conflicting? and (not overwrite?)
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failure(_("DHCP records %s already exists") % dhcp_record.conflicts.to_sentence, nil, :conflict)
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return true
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end
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false
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end
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end
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