26 lines
1.4 KiB
YAML
26 lines
1.4 KiB
YAML
---
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features:
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- |
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In this release SR-IOV live migration support is added to the libvirt
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virt driver for Neutron interfaces. Neutron SR-IOV interfaces can be
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grouped into two categories, direct mode interfaces and indirect.
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Direct mode SR-IOV interfaces are directly attached to the guest and
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exposed to the guest OS. Indirect mode SR-IOV interfaces have a software
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interface such as a macvtap between the guest and the SR-IOV device.
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This feature enables transparent live migration for instances with
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indirect mode SR-IOV devices. As there is no generic way to copy
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hardware state during a live migration, direct mode migration is not
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transparent to the guest. For direct mode interfaces, we mimic the
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workflow already in place for suspend and resume. For instance with
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SR-IOV devices, we detach the direct mode interfaces before migration
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and re-attach them after the migration. As a result, instances
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with direct mode SR-IOV port will lose network connectivity during a
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migration unless a bond with a live migratable interface is created
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within the guest.
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upgrade:
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The Libvirt SR-IOV migration feature intoduced in this release requires
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both the source and destination node to support the feature. As a result
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it will be automatically disabled until the conductor and compute nodes
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have been upgraded.
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