What is the difference between a Kubernetes Controller and a …
Dec 17, 2017 · I don't understand what you mean with "general purpose" and "specific purpose" here. An Operator is a controller. It's just that when the controller adds new k8s objects to store configuration for a component like prometheus or memcached, they use the term Operator. A controller normally just watches and reacts to native k8s objects. –
When exactly do I set an ownerReference's controller field to true?
Jun 28, 2018 · As you mentioned, if controller: true, the reference points to the managing controller, in other words, the owner. And also, it is the instruction for Garbage Collector's behavior related to the object and its owner. If controller: false, Garbage Collector manages the object as an object without an owner, for example, allows to delete it freely.
How to write a k8s controller that watches and reconciles arbitrary ...
May 26, 2023 · However, I was wondering whether I could use the controller-runtime for this. I have already built k8s controllers using the controller-runtime and like the general look & feel, although I mostly copy-pasted the stuff together from other projects and don't have a deep understanding on how the controller-runtime actually works.
How to trigger a Kubernetes controller reconciler for an arbitrary ...
May 3, 2021 · Example: To respond to cluster scaling events (e.g. the deletion or addition of Nodes), a Controller would watch Nodes and map the watch events to keys of objects managed by the controller. My challenge is how to map the Deployment to the depending VerticalScaler(s), since this information is not present on the Deployment.
go/k8s: controller-runtime upgrade, fake client lacks functionality
Nov 15, 2023 · I am attempting to upgrade controller-runtime from version 0.13.0 to 0.16.3, which has introduced several issues with tests due to breaking changes. I have managed to resolve most of them, but ther...
Controller pattern in k8s operators? - Stack Overflow
Aug 3, 2021 · The controller pattern has been summarized in these 3 sentences: A controller tracks at least one Kubernetes resource type. These objects have a spec field that represents the desired state. The controller(s) for that resource are responsible for making the current state come closer to that desired state.
How to reload nginx ingress controller - Stack Overflow
Dec 12, 2021 · The actual reload is done by the controller itself when it notices a change in the resources associated with the controller. You may restart pods (or exec nginx -s reload in each) to force the update, but from my experience there was no such requirement.
K8s controller update status and condition - Stack Overflow
Jun 2, 2023 · Im having k8s controller which needs to install some resources and update the status and condition accordantly. The flow in the reconcile is like following: Install the resource and don’t wait; Call to the function checkAvailability and update the status accordantly if ready/ pending install/ error; I’ve two main questions:
how to delete a ingress controller on kubernetes?
Jan 26, 2022 · get the namespace which your ingress controller installed in; kubectl get ns for example : ingress-nginx. 2- remove all resources in this namespace. kubectl delete all --all -n ingress-nginx if your ingress controller is not installed in a dedicated namespace so you will have to remove resources one by one .
List all controllers running in Kubernetes - Stack Overflow
Sep 13, 2018 · Not sure if there is a way to list controllers in k8s. every resource/object in k8s is controlled by a controller (control loop) with spec fields as values for desired state. if you have deployed a controller outside control plane (built-in controllers) then what i …