Add the default_ipv6_subnet_pool config option

This config option will allow an admin to set the default subnet-pool
to be used for automatic subnet CIDR allocation in the case of subnet-create
being called without a CIDR or subnet-pool ID.

This also paves the way for enabling IPv6 Prefix Delegation in PD-capable
environments.

DocImpact
Change-Id: Ifdd6e5267e4e5d32e72478ca4ac7e255eb3346ff
Partially-Implements: blueprint subnet-allocation

diff --git a/etc/neutron.conf b/etc/neutron.conf
index 95d2e5561bbf5b024dd9d8e7c38e96cc271ca6b5..5772e3f27d0b2af1e39977a2ffeb0f523b0208ff 100644 (file)
--- a/etc/neutron.conf
+++ b/etc/neutron.conf
@@ -146,6 +146,12 @@ lock_path = $state_path/lock
 # Maximum number of routes per router
 # max_routes = 30
 
+# Default Subnet Pool to be used for IPv6 subnet-allocation.
+# Specifies by UUID the pool to be used in case of subnet-create being
+# called without CIDR or subnet-pool ID. Set to "prefix_delegation"
+# to enable IPv6 Prefix Delegation in a PD-capable environment.
+# default_ipv6_subnet_pool =
+
 # =========== items for MTU selection and advertisement =============
 # Advertise MTU.  If True, effort is made to advertise MTU
 # settings to VMs via network methods (ie. DHCP and RA MTU options)

diff --git a/neutron/common/config.py b/neutron/common/config.py
index 96c304e8957119dd9be1dae497266a397ae065f6..3a17e042d50afa66a91964a8b1280c197f62e66d 100644 (file)
--- a/neutron/common/config.py
+++ b/neutron/common/config.py
@@ -71,6 +71,9 @@ core_opts = [
                help=_("Maximum number of host routes per subnet")),
     cfg.IntOpt('max_fixed_ips_per_port', default=5,
                help=_("Maximum number of fixed ips per port")),
+    cfg.IntOpt('default_ipv6_subnet_pool', default=None,
+               help=_("Default subnet-pool to be used for automatic subnet "
+                      "CIDR allocation")),
     cfg.IntOpt('dhcp_lease_duration', default=86400,
                deprecated_name='dhcp_lease_time',
                help=_("DHCP lease duration (in seconds). Use -1 to tell "

diff --git a/neutron/common/constants.py b/neutron/common/constants.py
index f9f5a9a3742e9cea01d185a85d6bb1aea0461ac3..185c6d0d6b77fdce6f628784dc6a181b8fbae42c 100644 (file)
--- a/neutron/common/constants.py
+++ b/neutron/common/constants.py
@@ -141,6 +141,10 @@ IPV6_MODES = [DHCPV6_STATEFUL, DHCPV6_STATELESS, IPV6_SLAAC]
 
 IPV6_LLA_PREFIX = 'fe80::/64'
 
+# Human-readable ID to which default_ipv6_subnet_pool should be set to
+# indicate that IPv6 Prefix Delegation should be used to allocate subnet CIDRs
+IPV6_PD_POOL_ID = 'prefix_delegation'
+
 # Linux interface max length
 DEVICE_NAME_MAX_LEN = 15