openstack/tripleo-heat-templates
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Add NeutronGlobalPhysnetMtu to neutron-base.yaml

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This adds an option to configure the global_physnet_mtu in
neutron.conf. This controls the base MTU for the physical network
which is used as a basis for the new auto calculated overlay network
MTU's.

For flat and VLAN tenant networks there has been a subtle breakage
in TripleO in that users of those network types may now need to
manually set NeutronGlobalPhysnetMtu to something less than the
physical network to imitate the previous behavior of the
now removed NeutronTenantMtu setting (removed in git
2a64b67cef74fff86ce6b56b15431b859515844d). Previously users of
say a vlan tenant network in TripleO would automatically get
the tenant network set to 1400.

Change-Id: I25c2435feb373e11e4fc3a2821db0c96211468e0
This commit is contained in:
Dan Prince 2016-08-26 22:16:39 -04:00
parent d67627b418
commit 825c42dcd9
1 changed files with 10 additions and 0 deletions
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10
puppet/services/neutron-base.yaml
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@ -48,6 +48,15 @@ parameters:
description: > description: >
Remove configuration that is not generated by TripleO. Setting Remove configuration that is not generated by TripleO. Setting
to false may result in configuration remnants after updates/upgrades. to false may result in configuration remnants after updates/upgrades.
NeutronGlobalPhysnetMtu:
type: number
default: 1500
description: |
MTU of the underlying physical network. Neutron uses this value to
calculate MTU for all virtual network components. For flat and VLAN
networks, neutron uses this value without modification. For overlay
networks such as VXLAN, neutron automatically subtracts the overlay
protocol overhead from this value.
ServiceNetMap: ServiceNetMap:
default: {} default: {}
description: Mapping of service_name -> network name. Typically set description: Mapping of service_name -> network name. Typically set
@ -87,3 +96,4 @@ outputs:
neutron::host: '"%{::fqdn}"' #NOTE: extra quoting is needed neutron::host: '"%{::fqdn}"' #NOTE: extra quoting is needed
neutron::db::database_db_max_retries: -1 neutron::db::database_db_max_retries: -1
neutron::db::database_max_retries: -1 neutron::db::database_max_retries: -1
neutron::global_physnet_mtu: {get_param: NeutronGlobalPhysnetMtu}