LXC configuration + useful hooks
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lxc-config/hooks/lib/lxc/rdns.rb

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module Lxc
class RdnsZone
def initialize(data, addr_field, subnet)
@data = data
@addr_field = addr_field
@subnet = NetAddr::CIDR.create(subnet)
end
attr_reader :data
def [](key)
(data["zone"] || {})[key]
end
def pointers(&blk)
@data["network"].each do |name, host|
ip = host[@addr_field]
next unless ip
arpa = NetAddr::CIDR.create(ip).arpa
next unless arpa.end_with?(@subnet.arpa)
host_part = arpa[0, arpa.size - @subnet.arpa.size - 1]
# only allowed characters in FQDN
name = name.gsub(/[^a-zA-Z0-9\-]/, "-")
yield name, host_part
end
end
def name
@subnet.arpa.gsub(/\.$/, "")
end
def write_zone_file(path)
zone_template = Template.new(CONFIG_ROOT.join("hooks/templates/rdns-zone.erb"))
domain = data["zone"]["dn42-domain"]
zone_template.write(path.join("zones", name),
zone: self,
data: data,
domain: domain)
end
end
end