31 lines
1.3 KiB
Plaintext
31 lines
1.3 KiB
Plaintext
enable_service ironic ir-api ir-cond
|
|
|
|
source $DEST/ironic/devstack/common_settings
|
|
|
|
# Set a default, so we can overwrite it if we need to.
|
|
PUBLIC_BRIDGE_MTU=${PUBLIC_BRIDGE_MTU:-1500}
|
|
|
|
# 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)
|
|
|
|
# At some point, devstack started pre-populating a public bridge mtu,
|
|
# which is fine, but that also got set and used in neutron as the MTU,
|
|
# which is fine, but if our MTU is lower, then that can create headaches,
|
|
# unless we *need* it lower for specific multinode testing.
|
|
# so if the calculated local_mtu *is* higher, then we are wrong, and trust
|
|
# a prepopulated variable (1500-40-30=1430 bytes)
|
|
if [ $local_mtu -gt $PUBLIC_BRIDGE_MTU ]; then
|
|
local_mtu=$PUBLIC_BRIDGE_MTU
|
|
fi
|
|
|
|
# 50 bytes is overhead for vxlan (which is greater than GRE
|
|
# allowing us to use either overlay option with this MTU.
|
|
# However, if traffic is flowing over IPv6 tunnels, then
|
|
# The overhead is essentially another 100 bytes. In order to
|
|
# handle both cases, lets go ahead and drop the maximum by
|
|
# 100 bytes.
|
|
PUBLIC_BRIDGE_MTU=${OVERRIDE_PUBLIC_BRIDGE_MTU:-$((local_mtu - 100))}
|