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module Orchestration::DNS
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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 :dns_conflict_detected?, :queue_dns
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before_destroy :queue_dns_destroy
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end
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end
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module InstanceMethods
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def dns?
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!domain.nil? and !domain.proxy.nil? and managed?
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end
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def reverse_dns?
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!subnet.nil? and !subnet.dns_proxy.nil? and managed? and capabilities.include?(:build)
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end
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def dns_a_record
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return unless dns? or @dns_a_record
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@dns_a_record ||= Net::DNS::ARecord.new dns_record_attrs
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end
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def dns_ptr_record
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return unless reverse_dns? or @dns_ptr_record
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@dns_ptr_record ||= Net::DNS::PTRRecord.new reverse_dns_record_attrs
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end
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protected
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def set_dns_a_record
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dns_a_record.create
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end
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def set_conflicting_dns_a_record
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dns_a_record.conflicts.each { |c| c.create }
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end
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def set_dns_ptr_record
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dns_ptr_record.create
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end
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def set_conflicting_dns_ptr_record
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dns_ptr_record.conflicts.each { |c| c.create }
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end
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def del_dns_a_record
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dns_a_record.destroy
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end
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def del_conflicting_dns_a_record
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dns_a_record.conflicts.each { |c| c.destroy }
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end
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def del_dns_ptr_record
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dns_ptr_record.destroy
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end
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def del_conflicting_dns_ptr_record
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dns_ptr_record.conflicts.each { |c| c.destroy }
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end
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private
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def dns_record_attrs
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{ :hostname => name, :ip => ip, :resolver => domain.resolver, :proxy => domain.proxy }
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end
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def reverse_dns_record_attrs
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{ :hostname => name, :ip => ip, :proxy => subnet.dns_proxy }
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end
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def queue_dns
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return unless (dns? or reverse_dns?) and errors.empty?
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queue_remove_dns_conflicts if overwrite?
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new_record? ? queue_dns_create : queue_dns_update
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end
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def queue_dns_create
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logger.debug "Scheduling new DNS entries"
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queue.create(:name => "Create DNS record for #{self}", :priority => 10,
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:action => [self, :set_dns_a_record])
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queue.create(:name => "Create Reverse DNS record for #{self}", :priority => 10,
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:action => [self, :set_dns_ptr_record]) if reverse_dns?
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end
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def queue_dns_update
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if old.ip != ip or old.name != name
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queue.create(:name => "Remove DNS record for #{old}", :priority => 9,
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:action => [old, :del_dns_a_record]) if old.dns?
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queue.create(:name => "Remove Reverse DNS record for #{old}", :priority => 9,
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:action => [old, :del_dns_ptr_record]) if old.reverse_dns?
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queue_dns_create
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end
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end
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def queue_dns_destroy
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return unless errors.empty?
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queue.create(:name => "Remove DNS record for #{self}", :priority => 1,
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:action => [self, :del_dns_a_record]) if dns?
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queue.create(:name => "Remove Reverse DNS record for #{self}", :priority => 1,
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:action => [self, :del_dns_ptr_record]) if reverse_dns?
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end
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def queue_remove_dns_conflicts
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return unless errors.empty?
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return unless overwrite?
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logger.debug "Scheduling DNS conflict removal"
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queue.create(:name => "Remove conflicting DNS record for #{self}", :priority => 0,
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:action => [self, :del_conflicting_dns_a_record]) if dns? and dns_a_record and dns_a_record.conflicting?
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queue.create(:name => "Remove conflicting Reverse DNS record for #{self}", :priority => 0,
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:action => [self, :del_conflicting_dns_ptr_record]) if reverse_dns? and dns_ptr_record and dns_ptr_record.conflicting?
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end
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def dns_conflict_detected?
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return false if ip.blank? or name.blank?
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# can't validate anything if dont have an ip-address yet
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return false unless require_ip_validation?
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# we should only alert on conflicts if overwrite mode is off
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return false if overwrite?
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status = true
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status = failure("DNS A Record #{dns_a_record.conflicts[0]} already exists", nil, :conflict) if dns? and dns_a_record and dns_a_record.conflicting?
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status &= failure("DNS PTR Record #{dns_ptr_record.conflicts[0]} already exists", nil, :conflict) if reverse_dns? and dns_ptr_record and dns_ptr_record.conflicting?
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status
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end
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end
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end
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