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https://github.com/gardener/gardener-extension-networking-calico

Gardener extension controller for the Calico CNI network plugin.
https://github.com/gardener/gardener-extension-networking-calico

calico cni extension gardener kubernetes networking

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Gardener extension controller for the Calico CNI network plugin.

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README 

        
# [Gardener Extension for Calico Networking](https://gardener.cloud)



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This controller operates on the [`Network`](https://github.com/gardener/gardener/blob/master/docs/proposals/03-networking-extensibility.md#gardener-network-extension) resource in the `extensions.gardener.cloud/v1alpha1` API group. It manages those objects that are requesting [Calico Networking](https://www.projectcalico.org/) configuration (`.spec.type=calico`):



```yaml

---

apiVersion: extensions.gardener.cloud/v1alpha1

kind: Network

metadata:

  name: calico-network

  namespace: shoot--core--test-01

spec:

  type: calico

  clusterCIDR: 192.168.0.0/24

  serviceCIDR:  10.96.0.0/24

  providerConfig:

    apiVersion: calico.networking.extensions.gardener.cloud/v1alpha1

    kind: NetworkConfig

    overlay:

      enabled: false

```



Please find [a concrete example](example/20-network.yaml) in the `example` folder. All the `Calico` specific configuration

should be configured in the `providerConfig` section. If additional configuration is required, it should be added to

the `networking-calico` chart in `controllers/networking-calico/charts/internal/calico/values.yaml` and corresponding code

parts should be adapted (for example in `controllers/networking-calico/pkg/charts/utils.go`).



Once the network resource is applied, the `networking-calico` controller would then create all the necessary `managed-resources` which should be picked

up by the [gardener-resource-manager](https://github.com/gardener/gardener-resource-manager) which will then apply all the

network extensions resources to the shoot cluster.



Finally after successful reconciliation an output similar to the one below should be expected.



```yaml

  status:

    lastOperation:

      description: Successfully reconciled network

      lastUpdateTime: "..."

      progress: 100

      state: Succeeded

      type: Reconcile

    observedGeneration: 1

    providerStatus:

      apiVersion: calico.networking.extensions.gardener.cloud/v1alpha1

      kind: NetworkStatus

```



## Compatibility



The following table lists known compatibility issues of this extension controller with other Gardener components.



| Calico Extension | Gardener | Action | Notes |

| ------------- | -------- | ------ |  --- |

| `>= v1.30.0` | `< v1.63.0` | Please first update Gardener components to `>= v1.63.0`. | Without the mentioned minimum Gardener version, Calico `Pod`s are not only scheduled to dedicated system component nodes in the shoot cluster.

----



## 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` pointed to the cluster you want to connect to.

Static code checks and tests can be executed by running `make verify`. We are using Go modules for Golang package dependency management and [Ginkgo](https://github.com/onsi/ginkgo)/[Gomega](https://github.com/onsi/gomega) for testing.



## Feedback and Support



Feedback and contributions are always welcome. Please report bugs or suggestions as [GitHub issues](https://github.com/gardener/gardener-extension-networking-calico/issues) or join our [Slack channel #gardener](https://kubernetes.slack.com/messages/gardener) (please invite yourself to the Kubernetes workspace [here](http://slack.k8s.io)).



## Learn more!



Please find further resources about out project here:



* [Our landing page gardener.cloud](https://gardener.cloud/)

* ["Gardener, the Kubernetes Botanist" blog on kubernetes.io](https://kubernetes.io/blog/2018/05/17/gardener/)

* ["Gardener Project Update" blog on kubernetes.io](https://kubernetes.io/blog/2019/12/02/gardener-project-update/)

* [Gardener Extensions Golang library](https://godoc.org/github.com/gardener/gardener/extensions/pkg)

* [GEP-1 (Gardener Enhancement Proposal) on extensibility](https://github.com/gardener/gardener/blob/master/docs/proposals/01-extensibility.md)

* [Extensibility API documentation](https://github.com/gardener/gardener/tree/master/docs/extensions)