IPv6: dhcp/provisioner: make ipv6 aware

If the admin network is IPv6 setup the ISC DHCPD server to configure
and use the IPv6 daemon. For this use a seperate set of ipv6 files
to list hosts and subnets as ipv6 hosts and subnets will fail if
v4 dhcp tries to load them.

Also make sure tftp is listening on both IPv4 and v6.

To make this all happen the Network class in the Barclamp::Inventory
library now tracks the ip_version of the network. Which is used to
make decisions through the DHCP and provisioner cookbooks.

To support backwards compatibilty with ipv4 config naming in the
DHCP barclamp a DhcpHelper was added to return config names in
an IPv4 or IPv6 way. The same pattern was used throughout the
barclamp in the early versions of this patch so it's been
refectered to the helper.

Finally, when dealing with some IPv6 addresses in URIs the address
needs to be wrapped. As such the network barclamp has grown a
NetworkHelper module to start gathering network related helper
method's, it's first is a wrap_ip function. Which will wrap an
address if it happens to an IPv6 address. This makes this available
to us anywhere in crowbar, so long as the network barclamp has been
applied, and as a core barclamp to crowbar, should be always.

Author: matthewoliver

chef/cookbooks/barclamp/libraries/barclamp_library.rb

@@ -92,6 +92,7 @@ class Network
         attr_reader :vlan, :use_vlan
         attr_reader :add_bridge, :add_ovs_bridge, :bridge_name
         attr_reader :conduit
+        attr_reader :ip_version
 
         def initialize(node, net, data)
           @node = node
@@ -112,6 +113,13 @@ def initialize(node, net, data)
           # let's resolve this only if needed
           @interface = nil
           @interface_list = nil
+
+          require "ipaddr"
+          @ip_version = if IPAddr.new(@subnet).ipv6?
+            "6"
+          else
+            "4"
+          end
         end
 
         def interface

chef/cookbooks/dhcp/attributes/default.rb

@@ -1,6 +1,6 @@
 
 default[:dhcp][:interfaces] = ["eth0"]
-default[:dhcp][:options] = [
+default[:dhcp][:options][:v4] = [
     "ddns-update-style none",
     "allow booting",
     "option option-128 code 128 = string",
@@ -10,4 +10,16 @@
     "option dhcp-client-debug code 226 = unsigned integer 16",
     "option dhcp-client-debug 0"
 ]
+default[:dhcp][:options][:v6] = [
+    "ddns-update-style none",
+    "allow booting",
+    "option option-128 code 128 = string",
+    "option option-129 code 129 = text",
+    "option dhcp-client-state code 225 = unsigned integer 16",
+    "option dhcp-client-state 0",
+    "option dhcp-client-debug code 226 = unsigned integer 16",
+    "option dhcp-client-debug 0",
+    "option dhcp6.bootfile-url code 59 = string",
+    "option dhcp6.client-arch-type code 61 = array of unsigned integer 16"
+]
 

chef/cookbooks/dhcp/libraries/helpers.rb

@@ -0,0 +1,9 @@
+module DhcpHelper
+  def self.config_filename(base, ip_version, extension = ".conf")
+    if ip_version == "4"
+      "#{base}#{extension}"
+    else
+      "#{base}#{ip_version}#{extension}"
+    end
+  end
+end

chef/cookbooks/dhcp/providers/host.rb

@@ -24,7 +24,9 @@
       hostname: new_resource.hostname,
       macaddress: new_resource.macaddress,
       ipaddress: new_resource.ipaddress,
-      options: new_resource.options
+      options: new_resource.options,
+      prefix: new_resource.prefix,
+      ip_version: new_resource.ip_version
     )
     owner "root"
     group "root"
@@ -35,7 +37,7 @@
   end
   utils_line "include \"#{filename}\";" do
     action :add
-    file "/etc/dhcp3/hosts.d/host_list.conf"
+    file "/etc/dhcp3/hosts.d/#{DhcpHelper.config_filename("host_list", new_resource.ip_version)}"
     if node[:provisioner][:enable_pxe]
       notifies :restart, resources(service: "dhcp3-server"), :delayed
     end
@@ -54,11 +56,13 @@
     end
     new_resource.updated_by_last_action(true)
   end
-  utils_line "include \"#{filename}\";" do
-    action :remove
-    file "/etc/dhcp3/hosts.d/host_list.conf"
-    if node[:provisioner][:enable_pxe]
-      notifies :restart, resources(service: "dhcp3-server"), :delayed
+  ["host_list.conf", "host_list6.conf"].each do |host_list|
+    utils_line "include \"#{filename}\";" do
+      action :remove
+      file "/etc/dhcp3/hosts.d/#{host_list}"
+      if node[:provisioner][:enable_pxe]
+        notifies :restart, resources(service: "dhcp3-server"), :delayed
+      end
     end
   end
 end

chef/cookbooks/dhcp/providers/subnet.rb

@@ -14,10 +14,11 @@
 #
 
 action :add do
+  subnet_template = DhcpHelper.config_filename("subnet", new_resource.ip_version, ".conf.erb")
   filename = "/etc/dhcp3/subnets.d/#{new_resource.subnet}.conf"
   template filename do
     cookbook "dhcp"
-    source "subnet.conf.erb"
+    source subnet_template
     variables(
       network: new_resource.network,
       options: new_resource.options,
@@ -31,9 +32,10 @@
       notifies :restart, resources(service: "dhcp3-server"), :delayed
     end
   end
+  subnet_file = DhcpHelper.config_filename("subnet_list", new_resource.ip_version)
   utils_line "include \"#{filename}\";" do
     action :add
-    file "/etc/dhcp3/subnets.d/subnet_list.conf"
+    file "/etc/dhcp3/subnets.d/#{subnet_file}"
     if node[:provisioner][:enable_pxe]
       notifies :restart, resources(service: "dhcp3-server"), :delayed
     end
@@ -52,11 +54,13 @@
     end
     new_resource.updated_by_last_action(true)
   end
-  utils_line "include \"#{filename}\";" do
-    action :remove
-    file "/etc/dhcp3/subnets.d/subnet_list.conf"
-    if node[:provisioner][:enable_pxe]
-      notifies :restart, resources(service: "dhcp3-server"), :delayed
+  ["subnet_list.conf", "subnet_list6.conf"].each do |subnet_list|
+    utils_line "include \"#{filename}\";" do
+      action :remove
+      file "/etc/dhcp3/subnets.d/#{subnet_list}"
+      if node[:provisioner][:enable_pxe]
+        notifies :restart, resources(service: "dhcp3-server"), :delayed
+      end
     end
   end
 end

chef/cookbooks/dhcp/recipes/default.rb

@@ -33,17 +33,25 @@
 directory "/etc/dhcp3/subnets.d"
 directory "/etc/dhcp3/hosts.d"
 
-file "/etc/dhcp3/groups.d/group_list.conf" do
+# This needs to be evaled.
+admin_network = Chef::Recipe::Barclamp::Inventory.get_network_by_type(node, "admin")
+address = admin_network.address
+intfs = [admin_network.interface]
+
+group_list = DhcpHelper.config_filename("group_list", admin_network.ip_version)
+file "/etc/dhcp3/groups.d/#{group_list}" do
   owner "root"
   group "root"
   mode 0644
 end
-file "/etc/dhcp3/subnets.d/subnet_list.conf" do
+subnet_list = DhcpHelper.config_filename("subnet_list", admin_network.ip_version)
+file "/etc/dhcp3/subnets.d/#{subnet_list}" do
   owner "root"
   group "root"
   mode 0644
 end
-file "/etc/dhcp3/hosts.d/host_list.conf" do
+host_list = DhcpHelper.config_filename("host_list", admin_network.ip_version)
+file "/etc/dhcp3/hosts.d/#{host_list}" do
   owner "root"
   group "root"
   mode 0644
@@ -59,22 +67,20 @@
   not_if "test -f /etc/dhcp3/omapi.key"
 end
 
-# This needs to be evaled.
-intfs = [Chef::Recipe::Barclamp::Inventory.get_network_by_type(node, "admin").interface]
-address = Chef::Recipe::Barclamp::Inventory.get_network_by_type(node, "admin").address
 
-d_opts = node[:dhcp][:options]
+d_opts = node[:dhcp][:options]["v#{admin_network.ip_version}"]
+dhcpd_conf = DhcpHelper.config_filename("dhcpd", admin_network.ip_version)
 
 case node[:platform_family]
 when "debian"
   case node[:lsb][:codename]
   when "natty","oneiric","precise"
-    template "/etc/dhcp/dhcpd.conf" do
+    template "/etc/dhcp/#{dhcpd_conf}" do
       owner "root"
       group "root"
       mode 0644
       source "dhcpd.conf.erb"
-      variables(options: d_opts)
+      variables(options: d_opts, ip_version: admin_network.ip_version)
       if node[:provisioner][:enable_pxe]
         notifies :restart, "service[dhcp3-server]"
       end
@@ -90,12 +96,12 @@
       end
     end
   else
-    template "/etc/dhcp3/dhcpd.conf" do
+    template "/etc/dhcp3/#{dhcpd_conf}" do
       owner "root"
       group "root"
       mode 0644
       source "dhcpd.conf.erb"
-      variables(options: d_opts)
+      variables(options: d_opts, ip_version: admin_network.ip_version)
       if node[:provisioner][:enable_pxe]
         notifies :restart, "service[dhcp3-server]"
       end
@@ -115,17 +121,17 @@
 
   dhcp_config_file = case
     when node[:platform_version].to_f >= 6
-      "/etc/dhcp/dhcpd.conf"
+      "/etc/dhcp/#{dhcpd_conf}"
     else
-      "/etc/dhcpd.conf"
+      "/etc/#{dhcpd_conf}"
     end
 
   template dhcp_config_file do
     owner "root"
     group "root"
     mode 0644
     source "dhcpd.conf.erb"
-    variables(options: d_opts)
+    variables(options: d_opts, ip_version: admin_network.ip_version)
     if node[:provisioner][:enable_pxe]
       notifies :restart, "service[dhcp3-server]"
     end
@@ -143,12 +149,12 @@
   end
 
 when "suse"
-  template "/etc/dhcpd.conf" do
+  template "/etc/#{dhcpd_conf}" do
     owner "root"
     group "root"
     mode 0644
     source "dhcpd.conf.erb"
-    variables(options: d_opts)
+    variables(options: d_opts, ip_version: admin_network.ip_version)
     if node[:provisioner][:enable_pxe]
       notifies :restart, "service[dhcp3-server]"
     end
@@ -168,7 +174,7 @@
 
 service "dhcp3-server" do
   if %w(suse rhel).include?(node[:platform_family])
-    service_name "dhcpd"
+    service_name DhcpHelper.config_filename("dhcpd", admin_network.ip_version, "")
   elsif node[:platform] == "ubuntu"
     case node[:lsb][:codename]
     when "maverick"

chef/cookbooks/dhcp/resources/host.rb

@@ -19,6 +19,8 @@
 attribute :hostname, kind_of: String
 attribute :macaddress, kind_of: String
 attribute :ipaddress, kind_of: String
+attribute :prefix, kind_of: String
+attribute :ip_version, kind_of: String, default: "4"
 attribute :group, kind_of: String
 attribute :options, kind_of: Array, default: []
 

chef/cookbooks/dhcp/resources/subnet.rb

@@ -20,4 +20,5 @@
 attribute :pools, kind_of: Array, default: ["dhcp"]
 attribute :pool_options, kind_of: Hash, default: { "dhcp" => ["allow unknown-hosts"] }
 attribute :options, kind_of: Array, default: []
+attribute :ip_version, kind_of: String, default: "4"
 

chef/cookbooks/dhcp/templates/default/dhcpd.conf.erb

@@ -21,6 +21,12 @@ log-facility local7;
 # Fix for https://bugzilla.opensuse.org/show_bug.cgi?id=961536
 always-reply-rfc1048 true;
 
+<% if @ip_version == "6"  -%>
+include "/etc/dhcp3/groups.d/group_list6.conf";
+include "/etc/dhcp3/subnets.d/subnet_list6.conf";
+include "/etc/dhcp3/hosts.d/host_list6.conf";
+<% else -%>
 include "/etc/dhcp3/groups.d/group_list.conf";
 include "/etc/dhcp3/subnets.d/subnet_list.conf";
 include "/etc/dhcp3/hosts.d/host_list.conf";
+<% end -%>

chef/cookbooks/dhcp/templates/default/host.conf.erb

@@ -2,7 +2,12 @@ host <%= @name %> {
   option host-name "<%= @hostname %>";
   hardware ethernet <%= @macaddress %>;
 <% if @ipaddress -%> 
+<%   if @ip_version == "6" -%>
+  fixed-address6 <%= @ipaddress %>;
+  fixed-prefix6 <%= @prefix %>;
+<%   else -%>
   fixed-address <%= @ipaddress %>;
+<%   end -%>
 <% else -%>
   deny booting;
 <% end -%>