Kubernetes Gardener

Bootstrapping Gardener

To set up your own Gardener, see thedocumentationor have a look at thelandscape-setup-templateproject. To learn more about this open source project, read theblog on kubernetes.io.

Install and configure kubectl

• If you already have kubectl CLI, run kubectl version —short to checkthe version. You need v1.10 or newer. If your kubectl is older, follow thenext step to install a newer version.

• Install the kubectl CLI.

Access Gardener

• Create a project in the Gardener dashboard. This will essentially create aKubernetes namespace with the name garden-<my-project>.

• Configure access to your Gardener projectusing a kubeconfig. If you are not the Gardener Administrator already, youcan create a technical user in the Gardener dashboard: go to the “Members”section and add a service account. You can then download the kubeconfig foryour project. You can skip this step if you create your cluster using theuser interface; it is only needed for programmatic access, make sure you setexport KUBECONFIG=garden-my-project.yaml in your shell.

Creating a Kubernetes cluster

You can create your cluster using kubectl cli by providing a clusterspecification yaml file. You can find an example for GCPhere.Make sure the namespace matches that of your project. Then just apply theprepared so-called “shoot” cluster CRD with kubectl:

$ kubectl apply --filename my-cluster.yaml

The easier alternative is to create the cluster following the cluster creationwizard in the Gardener dashboard:

Configure kubectl for your cluster

You can now download the kubeconfig for your freshly created cluster in theGardener dashboard or via cli as follows:

$ kubectl --namespace shoot--my-project--my-cluster get secret kubecfg --output jsonpath={.data.kubeconfig} | base64 --decode > my-cluster.yaml

This kubeconfig file has full administrators access to you cluster. For the restof this guide be sure you have export KUBECONFIG=my-cluster.yaml set.

Cleaning up

Use the Gardener dashboard to delete your cluster, or execute the following withkubectl pointing to your garden-my-project.yaml kubeconfig:

$ kubectl --kubeconfig garden-my-project.yaml --namespace garden--my-project annotate shoot my-cluster confirmation.garden.sapcloud.io/deletion=true
$ kubectl --kubeconfig garden-my-project.yaml --namespace garden--my-project delete shoot my-cluster