510f87a033
Temporary make metal3-integration non-voting until we merge the fix for regression https://review.opendev.org/c/openstack/ironic/+/928885. Change-Id: If8f9907df62019b3cf6d6df7d83d5ff421f6be65
34 lines
1.4 KiB
Plaintext
34 lines
1.4 KiB
Plaintext
enable_service ironic ir-api ir-cond
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source $DEST/ironic/devstack/common_settings
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# Set a default, so we can overwrite it if we need to.
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PUBLIC_BRIDGE_MTU=${PUBLIC_BRIDGE_MTU:-1500}
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# NOTE(vsaienko) mtu calculation has been changed recently to 1450
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# https://github.com/openstack/neutron/commit/51a697
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# and caused https://bugs.launchpad.net/ironic/+bug/1631875
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# Get the smallest local MTU
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local_mtu=$(ip link show | sed -ne 's/.*mtu \([0-9]\+\).*/\1/p' | sort -n | head -1)
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# At some point, devstack started pre-populating a public bridge mtu,
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# which is fine, but that also got set and used in neutron as the MTU,
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# which is fine, but if our MTU is lower, then that can create headaches,
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# unless we *need* it lower for specific multinode testing.
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# so if the calculated local_mtu *is* higher, then we are wrong, and trust
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# a prepopulated variable (1500-40-30=1430 bytes)
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if [ $local_mtu -gt $PUBLIC_BRIDGE_MTU ]; then
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local_mtu=$PUBLIC_BRIDGE_MTU
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fi
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# 50 bytes is overhead for vxlan (which is greater than GRE
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# allowing us to use either overlay option with this MTU).
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# However, if traffic is flowing over IPv6 tunnels, then
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# The overhead is essentially another 78 bytes. In order to
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# handle both cases, lets go ahead and drop the maximum by
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# 78 bytes, while not going below 1280 to make IPv6 work at all.
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PUBLIC_BRIDGE_MTU=${OVERRIDE_PUBLIC_BRIDGE_MTU:-$((local_mtu - 78))}
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if [ $PUBLIC_BRIDGE_MTU -lt 1280 ]; then
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PUBLIC_BRIDGE_MTU=1280
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fi
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