Project Gardener implements the automated management and operation of Kubernetes clusters as a service. Its main principle is to leverage Kubernetes concepts for all of its tasks.
Recently, most of the vendor specific logic has been developed in-tree. However, the project has grown to a size where it is very hard to extend, maintain, and test. With GEP-1 we have proposed how the architecture can be changed in a way to support external controllers that contain their very own vendor specifics. This way, we can keep Gardener core clean and independent.
This controller implements Gardener's extension contract for the shoot-networking-problemdetector extension.
An example for a ControllerRegistration resource that can be used to register this controller to Gardener can be found here.
Please find more information regarding the extensibility concepts and a detailed proposal here.
Currently there is nothing to specify in the extension spec.
Example extension resource:
apiVersion: extensions.gardener.cloud/v1alpha1
kind: Extension
metadata:
name: extension-shoot-networking-problemdetector
namespace: shoot--project--abc
spec:When an extension resource is reconciled, the extension controller will create two daemonsets nwpd-agent-pod-net and nwpd-agent-node-net deploying
the "network problem detector agent".
These daemon sets perform and collect various checks between all nodes of the Kubernetes cluster, to its Kube API server and/or external endpoints.
Checks are performed using TCP connections, PING (ICMP) or mDNS (UDP).
More details about the network problem detector agent can be found in its repository gardener/network-problem-detector.
Please note, this extension controller relies on the Gardener-Resource-Manager to deploy k8s resources to seed and shoot clusters.
You can run the controller locally on your machine by executing make start.
We are using Go modules for Golang package dependency management and Ginkgo/Gomega for testing.
Feedback and contributions are always welcome. Please report bugs or suggestions as GitHub issues or join our Slack channel #gardener (please invite yourself to the Kubernetes workspace here).
Please find further resources about out project here: