IvanHunters
dffe259d95
## What this PR does **Problem.** `ovn-controller` runs inside the `ovs-ovn` DaemonSet's single `openvswitch` container, sharing one CPU limit with `ovsdb-server` and `ovs-vswitchd`. The container CPU limit was `2` cores and the request `10m`. For three latency-sensitive daemons on a busy cluster that ceiling is tight: under a burst of pod creation (a large install with many concurrent HelmReleases) `ovn-controller` is CPU-bound while programming OpenFlow for newly created logical ports, and a `10m` request leaves it almost no guaranteed share under node CPU contention. **Change.** Raise the `ovs-ovn` container CPU limit from `2` to `4` cores and the request from `10m` to `100m`, so the co-located daemons have headroom under burst and `ovn-controller` keeps a guaranteed scheduling share under contention. Memory is unchanged — the change is scoped to CPU. **Scope — hardening, not a proven fix.** This change started from a hypothesis that CPU throttling was lengthening flow-programming and causing transient host→pod unreachability (`connection refused` from a pod's own node) during burst installs. A live trace of a captured occurrence of that symptom showed **zero** `ovs-ovn` CPU throttling in the failure window, so the throttle ceiling was **not** the cause of that failure. This PR therefore lands as a cheap, safe, well-bounded headroom improvement on a ceiling that is genuinely tight for three co-located daemons — not as a fix for the unreachability flake, whose root cause is separate and still open. **Test.** `helm template` confirms the rendered `ovs-ovn` DaemonSet now sets `requests.cpu: 100m` and `limits.cpu: 4` (with `ephemeral-storage: 1Gi` inherited from the subchart default). A new helm-unittest regression guard pins the raised limit and request. ### Screenshots No UI changes. ### Release note ```release-note fix(kube-ovn): raise the ovs-ovn container CPU limit to 4 cores (request to 100m) so the co-located ovn-controller/ovsdb-server/ovs-vswitchd daemons have CPU headroom under burst installs ```
Cozystack
Cozystack is a free platform and framework for building clouds.
Cozystack is a CNCF Sandbox Level Project that was originally built and sponsored by Ænix.
With Cozystack, you can transform a bunch of servers into an intelligent system with a simple REST API for spawning Kubernetes clusters, Database-as-a-Service, virtual machines, load balancers, HTTP caching services, and other services with ease.
Use Cozystack to build your own cloud or provide a cost-effective development environment.
Use-Cases
-
Using Cozystack to build a public cloud
You can use Cozystack as a backend for a public cloud -
Using Cozystack to build a private cloud
You can use Cozystack as a platform to build a private cloud powered by Infrastructure-as-Code approach -
Using Cozystack as a Kubernetes distribution
You can use Cozystack as a Kubernetes distribution for Bare Metal
Documentation
The documentation is located on the cozystack.io website.
Read the Getting Started section for a quick start.
If you encounter any difficulties, start with the troubleshooting guide and work your way through the process that we've outlined.
Versioning
Versioning adheres to the Semantic Versioning principles.
A full list of the available releases is available in the GitHub repository's Release section.
Contributions
Contributions are highly appreciated and very welcomed!
In case of bugs, please check if the issue has already been opened by checking the GitHub Issues section. If it isn't, you can open a new one. A detailed report will help us replicate it, assess it, and work on a fix.
You can express your intention to on the fix on your own. Commits are used to generate the changelog, and their author will be referenced in it.
If you have a concrete feature request, open an issue. For a cross-cutting or architectural change, open a design proposal in the community repo. For questions or early ideas, use GitHub Discussions. See CONTRIBUTING.md for the full routing.
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License
Cozystack is licensed under Apache 2.0.
The code is provided as-is with no warranties.
Commercial Support
A list of companies providing commercial support for this project can be found on official site.