README
¶
This Gardener Extension Provider is a work in progress. Code may still break at any time. Use at your own risk.
Gardener Extension for Hetzner Cloud provider
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 Hetzner cloud provider.
The latest release's 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.
Supported Kubernetes versions
This extension controller supports the following Kubernetes versions:
| Version | Support |
|---|---|
| Kubernetes 1.23 | 1.23.0+ |
| Kubernetes 1.22 | 1.22.0+ |
| Kubernetes 1.21 | 1.21.0+ |
| Kubernetes 1.20 | 1.20.0+ |
| Kubernetes 1.19 | 1.19.0+ |
| Kubernetes 1.18 | 1.18.0+ |
| Kubernetes 1.17 | 1.17.0+ |
| Kubernetes 1.16 | 1.16.0+ |
| Kubernetes 1.15 | 1.15.0+ |
Please take a look here to see which versions are supported by Gardener in general.
How to start using or developing this extension controller locally
You can run the controller locally on your machine by executing make start.
Static code checks and tests can be executed by running VERIFY=true make all. We are using Go modules for Golang package dependency management and Ginkgo/Gomega for testing.
Feedback and Support
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).
Learn more!
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
- GEP-1 (Gardener Enhancement Proposal) on extensibility
- GEP-4 (New
core.gardener.cloud/v1beta1API) - Extensibility API documentation
- Gardener Extensions Golang library
- Gardener API Reference
Directories
¶
| Path | Synopsis |
|---|---|
|
gardener-extension-provider-hcloud
Package chart enables go:generate support for generating the correct controller registration.
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Package chart enables go:generate support for generating the correct controller registration. |
|
cmd
|
|
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gardener-extension-admission-hcloud
Package main provides the application's entry point
|
Package main provides the application's entry point |
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gardener-extension-provider-hcloud
Package main provides the application's entry point
|
Package main provides the application's entry point |
|
pkg
|
|
|
cmd/admission
Package admission provides admission webhook configuration structures used for command execution
|
Package admission provides admission webhook configuration structures used for command execution |
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cmd/controller
Package controller provides Kubernetes controller configuration structures used for command execution
|
Package controller provides Kubernetes controller configuration structures used for command execution |
|
controller/controlplane
Package controlplane contains functions used at the controlplane controller
|
Package controlplane contains functions used at the controlplane controller |
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controller/healthcheck
Package healthcheck contains functions used for cluster validation
|
Package healthcheck contains functions used for cluster validation |
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controller/infrastructure
Package infrastructure contains functions used at the infrastructure controller
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Package infrastructure contains functions used at the infrastructure controller |
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controller/infrastructure/ensurer
Package ensurer provides functions used to ensure infrastructure changes to be applied
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Package ensurer provides functions used to ensure infrastructure changes to be applied |
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controller/worker
Package worker contains functions used at the worker controller
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Package worker contains functions used at the worker controller |
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controller/worker/ensurer
Package ensurer provides functions used to ensure worker changes to be applied
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Package ensurer provides functions used to ensure worker changes to be applied |
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hcloud
Package hcloud provides types and functions used for HCloud interaction
|
Package hcloud provides types and functions used for HCloud interaction |
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hcloud/apis
Package apis is the main package for HCloud specific APIs
|
Package apis is the main package for HCloud specific APIs |
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hcloud/apis/config
Package config provides hcloud.provider.extensions.config.gardener.cloud
|
Package config provides hcloud.provider.extensions.config.gardener.cloud |
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hcloud/apis/config/install
Package install provides functions used for registration of hcloud.provider.extensions.config.gardener.cloud
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Package install provides functions used for registration of hcloud.provider.extensions.config.gardener.cloud |
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hcloud/apis/config/loader
Package loader contains functions used for reading hcloud.provider.extensions.config.gardener.cloud
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Package loader contains functions used for reading hcloud.provider.extensions.config.gardener.cloud |
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hcloud/apis/config/v1alpha1
Package v1alpha1 provides hcloud.provider.extensions.config.gardener.cloud/v1alpha1
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Package v1alpha1 provides hcloud.provider.extensions.config.gardener.cloud/v1alpha1 |
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hcloud/apis/controller
Package controller provides functions to access controller specifications
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Package controller provides functions to access controller specifications |
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hcloud/apis/install
Package install provides functions used for registration of hcloud.provider.extensions.gardener.cloud
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Package install provides functions used for registration of hcloud.provider.extensions.gardener.cloud |
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hcloud/apis/mock
Package mock provides all methods required to simulate a HCloud provider environment
|
Package mock provides all methods required to simulate a HCloud provider environment |
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hcloud/apis/transcoder
Package transcoder is used for API related object transformations
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Package transcoder is used for API related object transformations |
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hcloud/apis/v1alpha1
Package v1alpha1 contains the HCloud provider API resources.
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Package v1alpha1 contains the HCloud provider API resources. |
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hcloud/apis/validation
Package validation contains functions to validate controller specifications
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Package validation contains functions to validate controller specifications |
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webhook/controlplane
Package controlplane contains functions used to provide /controlplane
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Package controlplane contains functions used to provide /controlplane |