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This controller operates on the
OperatingSystemConfig resource in the
extensions.gardener.cloud/v1alpha1 API group. It manages those objects that are requesting Ubuntu OS configuration (
.spec.type=ubuntu). An experimental support for Ubuntu Pro is added (
--- apiVersion: extensions.gardener.cloud/v1alpha1 kind: OperatingSystemConfig metadata: name: pool-01-original namespace: default spec: type: ubuntu units: ... files: ...
Please find a concrete example in the
After reconciliation the resulting data will be stored in a secret within the same namespace (as the config itself might contain confidential data). The name of the secret will be written into the resource’s
... status: ... cloudConfig: secretRef: name: osc-result-pool-01-original namespace: default command: /usr/bin/env bash <path> units: - docker-monitor.service - kubelet-monitor.service - kubelet.service
The secret has one data key
cloud_config that stores the generation.
An example for a
ControllerRegistration resource that can be used to register this controller to Gardener can be found here.
This controller is implemented using the
oscommon library for operating system configuration controllers.
Please find more information regarding the extensibility concepts and a detailed proposal here.
How to start using or developing this extension controller locally
You can run the controller locally on your machine by executing
make start. Please make sure to have the kubeconfig to the cluster you want to connect to ready in the
Static code checks and tests can be executed by running
make verify. We are using Go modules for Golang package dependency management and Ginkgo/Gomega for testing.
Feedback and Support
Please find further resources about out project here:
- Our landing page gardener.cloud
- “Gardener, the Kubernetes Botanist” blog on kubernetes.io
- “Gardener Project Update” blog on kubernetes.io
- Gardener Extensions Golang library
- GEP-1 (Gardener Enhancement Proposal) on extensibility
- Extensibility API documentation
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