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2020-07-27 06:50:20 -0500 answered a question kolla-ansible multiple external vlans provider network configuration

Hello I didn't find that it's documented, but neutron_bridge_name and neutron_external_interface are treated as list and are processed iteratively.

Just add to:

/etc/ansible/kolla-ansible/group_vars/network for example: neutron_bridge_name: br-ex1, br-ex2 neutron_external_interface: eth3, eth4

Kolla will add bridge mappings automatically like that:

[ovs] bridge_mappings = physnet1:br-ex1,physnet2: br-ex2

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2017-12-20 07:12:58 -0500 asked a question Instance is not booting with GPU passthrough

Hi I'm trying configure gpu passthrough with Tesla K40 on Openstack Ocata. Configuration of nova.conf: [pci] alias = { "vendor_id":"10de", "product_id":"1023", "device_type":"type-PCI", "name":"tesla_k40m" } passthrough_whitelist={"vendor_id":"10de","product_id":"1023"}

intel_iommu is enabled.

Flavor: +----------------------------+--------------------------------------+ | Field | Value | +----------------------------+--------------------------------------+ | OS-FLV-DISABLED:disabled | False | | OS-FLV-EXT-DATA:ephemeral | 0 | | access_project_ids | 00fef844a8ac47a698b63d6b4acdaaea | | disk | 40 | | id | g8-8 | | name | g.8VCPU_8GB | | os-flavor-access:is_public | False | | properties | pci_passthrough:alias='tesla_k40m:1' | | ram | 8192 | | rxtx_factor | 1.0 | | swap | | | vcpus | 8 | +----------------------------+--------------------------------------+

Creating and spawning instance is successfull, but virtualmachine stucks on "Booting from hard disk" on console. No log output of instance. Nothing in nova-compute and libvirt logs. This is virsh xml config of hard disk and pci:

<devices> <emulator>/usr/bin/kvm-spice</emulator> <disk type="file" device="disk"> <driver name="qemu" type="qcow2" cache="none"/> <source file="/var/lib/nova/instances/9907ddca-c340-4cc9-87fe-78396be83bab/disk"/> <backingstore type="file" index="1"> <format type="raw"/> <source file="/var/lib/nova/instances/_base/409c47b8208c854c1a44941de4b1004b1ed2e936"/> <backingstore/> </backingstore> <target dev="vda" bus="virtio"/> <alias name="virtio-disk0"/>

</disk> ... <hostdev mode="subsystem" type="pci" managed="yes"> <driver name="vfio"/> <source>
</source> <alias name="hostdev0"/>
</hostdev>

Seems that pci device is attached successfully.

How to diagnose this issue?