Description of problem:
Customer is facing timeout hits while creating subnets in a network with a large amount of subnets already created.
Version-Release number of selected component (if applicable):
Red Hat OpenStack Platform release 16.2.2
How reproducible:
everytime
Steps to Reproduce:
1. Create a shared provider network on a VLAN
2. Create a large subnet pool (e.g. /15)
3. Create subnets from the subnet pool in a loop and capture the time it takes to create as the total count increases
Actual results:
Every subnet takes more time than the previous to be created
Expected results:
subnet creation takes the correct amount of time without hitting the haproxy timeout.
Additional info:
For step 3, when there are a few subnets it should create/delete quite quickly (less than 10s). However they have seen that it can take around 2-3 minutes to create/delete a subnet on this network when we have ~1100 subnets, which exceeds the default HA proxy timeout of 2m. Currently they have a 5m timeout, but since they need to create ~4000 subnets on this network they will probably have to increase this timeout even further.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory (Release of components for Red Hat OpenStack Platform 16.2.4), and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHBA-2022:8794