DHCP timeout when creating instances for specific tenants

Eric K. Miller emiller at genesishosting.com
Wed Dec 4 22:47:54 UTC 2019

Hi Grant,


Are you sure this is a DHCP timeout and not a DNS resolution issue?  I ask because we have seen a strange DNS issue occur that can cause something similar.


Are the VMs being assigned an IP after they finally boot?


Eric K. Miller

Genesis Hosting Solutions, LLC

Try our Genesis Public Cloud - powered by OpenStack!

https://genesishosting.com/ <https://genesishosting.com/> 




From: Grant Morley [mailto:grant at civo.com] 
Sent: Wednesday, December 04, 2019 11:00 AM
To: openstack-operators at lists.openstack.org
Cc: Ian Banks
Subject: DHCP timeout when creating instances for specific tenants


Hi all,

I wonder if anyone can help shed any light on an odd issue we are seeing with only a couple of specific tenants. Basically if they launch an instance they are taking about 5 minutes to launch rather than our usual 30 second or so launch.

We are seeing the following on the instance logs:


Weirdly it only seems to be happening for 1 or 2 new tenants. I have tested this on our personal account and a few other customers have tested and their instances launch really quickly as expected. 

Is there anything specific during the tenant creation that can cause this issue? Or are there any logs in nova / neutron I should be looking out for that might shed some light? 

I haven't seen anything that is obvious. Any help would be much appreciated as we are a little stumped at the moment.

Many thanks,




Grant Morley 

Cloud Lead, Civo Ltd

www.civo.com <https://www.civo.com/>  | Signup for an account! <https://www.civo.com/signup> 

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