Traffic is sent to Avi primary pool when marked down by min_servers_up in a pool group.

Products

• VMware Avi Load Balancer

Issue/Introduction

Application traffic continues to be routed towards the primary pool if marked down by min_servers_up feature.

Example:

Pool Group with pools A and B:

Pool A - (Primary) priority set to 2

- 2 Pool Members — min_servers_up 2 - pool is marked Down 

-- server-A - Down

-- server-B - Up

Pool B - (Secondary) priority set to 1

- 2 Pool Members — min_servers_up 2 – pool is marked Up

-- server-A - Up

-- server-B - Up

The pool A is properly marked down by the feature min_servers_up, but traffic is still routed to Pool A and not B.

 

Environment

All Avi versions.

Cause

The is a day one issue that affects pool groups using the min_servers_up feature to mark a pool down.

Resolution

Upgrade to the fix Avi versions or patch versions.

AV-228171: The Service Engine may incorrectly select a server from a high-priority pool, although the pool is marked Down, from a pool group with min_servers_up configured.

Fix Version(s): 22.1.7-2p5, 30.2.2-2p3, 30.2.3, 31.1.1-2p1