enable_service ironic ir-api ir-cond source $DEST/ironic/devstack/common_settings # NOTE(vsaienko) mtu calculation has been changed recently to 1450 # https://github.com/openstack/neutron/commit/51a697 # and caused https://bugs.launchpad.net/ironic/+bug/1631875 # Get the smallest local MTU local_mtu=$(ip link show | sed -ne 's/.*mtu \([0-9]\+\).*/\1/p' | sort -n | head -1) # 50 bytes is overhead for vxlan (which is greater than GRE # allowing us to use either overlay option with this MTU. PUBLIC_BRIDGE_MTU=${OVERRIDE_PUBLIC_BRIDGE_MTU:-$((local_mtu - 50))}