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Change MTU logic to allow for lower MTUs automatically

Change-Id: I40d357e716b589585493824cfd963fd5f579bd81
changes/98/683798/2
Julia Kreger 2 years ago
parent
commit
cf074202e5
  1. 6
      devstack/settings
  2. 2
      zuul.d/ironic-jobs.yaml

6
devstack/settings

@ -9,4 +9,8 @@ source $DEST/ironic/devstack/common_settings
local_mtu=$(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))}
# 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))}

2
zuul.d/ironic-jobs.yaml

@ -30,7 +30,6 @@
DEFAULT_INSTANCE_TYPE: baremetal
FORCE_CONFIG_DRIVE: True
INSTALL_TEMPEST: False # Don't install a tempest package globaly
OVERRIDE_PUBLIC_BRIDGE_MTU: 1350
TEMPEST_PLUGINS: "{{ ansible_user_dir }}/src/opendev.org/openstack/ironic-tempest-plugin"
VIRT_DRIVER: ironic
BUILD_TIMEOUT: 720
@ -391,7 +390,6 @@
IRONIC_VM_LOG_DIR: '{{ devstack_base_dir }}/ironic-bm-logs'
IRONIC_VM_SPECS_RAM: 384
IRONIC_VM_SPECS_DISK: 4
OVERRIDE_PUBLIC_BRIDGE_MTU: 1350
OVS_BRIDGE_MAPPINGS: 'mynetwork:brbm,public:br-infra'
OVS_PHYSICAL_BRIDGE: brbm
PHYSICAL_NETWORK: mynetwork

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