Neutron error while launching instance (rocky - ubuntu 18)

asked 2018-12-01 06:51:59 -0500

star5 gravatar image

I am having issues setting up neutron.

Infrastructure details:

Operating System : Ubuntu 18.04.1 LTS

1 x controller and 1 x compute

Openstack installation : Rocky

Guide following: (

Each node has 2 NICs:-

NIC 1 (eth0) - (gateway:

NIC 2 (eth1) (Has internet connection) - (gateway:

ifconfig output -

Openstack network : ( (Option2: Self-Service Network)

I have followed the instructions to the exact thing in the documentation few times.

Error while launching a new instance:

Error: Failed to perform requested operation on instance "node11", the instance has an error status: Please try again later [Error: Build of instance bb5703a2-2bfe-42a9-9e69-7bb1a8e8cfd5 aborted: Failed to allocate the network(s), not rescheduling.].

Configs files of controller:

neutron config:

/etc/neutron/plugins/ml2/linuxbridge_agent.ini :

/etc/neutron/plugins/ml2/ml2_conf.ini :

/etc/neutron/l3_agent.ini :

Logs of controller:

Neutron server log:

Linuxbridge Agent log :

Logs of compute node:

nova-compute.log :


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@Bernd Bausch : Any take on the issue ?

star5 gravatar imagestar5 ( 2018-12-03 23:31:06 -0500 )edit

Too many log files, too little time.

Have you found any error messages in your logs?

Bernd Bausch gravatar imageBernd Bausch ( 2018-12-05 01:19:41 -0500 )edit

what does "ip netns" return? Do you see qrouters or only qdhcp entries?

JoeMiMue gravatar imageJoeMiMue ( 2019-01-10 05:47:00 -0500 )edit