ingress-nginx: Performance degradation when upgrading from 0.21.0 to 0.23.0
Is this a BUG REPORT or FEATURE REQUEST? (choose one): Bug report NGINX Ingress controller version: 0.23.0
Kubernetes version (use kubectl version):
1.11.7
Environment:
- Cloud provider or hardware configuration: AWS
- OS (e.g. from /etc/os-release): Container Linux by CoreOS 2023.4.0 (Rhyolite)
- Kernel (e.g.
uname -a): 4.19.23-coreos-r1 - Install tools: ?
- Others: ?
What happened: After upgrading from v0.21.0 to v0.23.0, I noticed an impact on performance both in memory and CPU.
What you expected to happen: I expected performance to remain more or less the same or become better.
How to reproduce it (as minimally and precisely as possible): I just upgraded the image in my k8s manifest and update the nginx.tmpl
Anything else we need to know: I attached an image of my nginx grafana dashboard, its easy to see when the upgrade happened.
About this issue
- Original URL
- State: closed
- Created 5 years ago
- Reactions: 1
- Comments: 16 (9 by maintainers)
Sorry for not responding, the issue was resolved a couple of days ago. The problem was that we had 2 ingresses that use dynamic certificates and were not configured correctly. This caused the nginx-ingress pods to constantly reload the config, but no warning or error was printed to the log. Another important issue is that these object were also miss-configured in 0.21.0 and 0.22.0 but there was no constant reloading there.