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** Changed in: nova
Status: Incomplete => Invalid
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https://bugs.launchpad.net/bugs/1400574
Title:
Create VMs sometimes failure when use mellonax nic as SR-IOV
Status in OpenStack Compute (nova):
Invalid
Bug description:
SYMPTOM:
I used the mellonax nic as SR-IOV, then create VMs has a problem (some can
create success,some failed) ,and the traffic is also affected (the VLAN of
some VMs is error).
CAUSE:
Due to the particularity of mellonax nic, a PCI number corresponding to the
two physical net ports, so lead to that nova side only scan to one net port
from the PCI , and doesn't perceive another one.
In my environment, eth0 has three available VF resources, eth1 has
four available VF resources.
the comment of nova-compute.conf:
pci_passthrough_whitelist={"devname":"eth1","physical_network":"sriov_net2","bandwidths":"0"}
pci_passthrough_whitelist={"devname":"eth0","physical_network":"sriov_net","bandwidths":"10000"}
Even if the whitelist is correctly configured, Nova from whitelist is
still unable to get VF resources information network port, Nova side
only scan by PCI , when scanned a corresponding PCI net port, does not
scan a network the rest of the ports, causing direct plane in the net
export under the network not VF resources,so create a virtual machine
failed in the through plane.And the net port that has been scanned
occupies the VF resources of another net port,this will result in
front of a portion of the virtual machine settings VLAN error.
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