## Kubernetes

Cockpit has a dashboard that interacts with a Kubernetes cluster or an Openshift v3 cluster. This functionality is in the Cockpit kubernetes package.

The dashboard can either be deployed on kubernetes as a container in a pod or used via a normal authenticated Cockpit session. Cockpit communicates with Kubernetes via its REST API.

## Used in a standard Cockpit session

When the Kubernetes dashboard is used in a standard Cockpit login session, usually some form of authentication is necessary to access the Kubernetes REST API. Like the `kubectl` and `oc` commands, Cockpit uses the authentication and server information in the `~/.kube/config` file for the logged in user.

If a user is able to use `kubectl` successfully when at their shell terminal, then that same user will able to use Kubernetes dashboard when logged into Cockpit:

    $ kubectl get pods
    NAME                      READY     STATUS    RESTARTS   AGE
    docker-registry-1-l4pyh   1/1       Running   10         23d
    ...

When running Openshift one can use the `oc login` command to configure the `~/.kube/config` file correctly. This in turn allows Cockpit to use that login information.

## Used as a Kubernetes Pod

The Kubernetes dashboard can be deployed as a pod on Kubernetes requiring users to log in using the standard standard authentication configured for access to its API.

    $ wget https://raw.githubusercontent.com/cockpit-project/cockpit/master/containers/kubernetes-cockpit.json
    $ kubectl create -f kubernetes-cockpit.json

This pod can be used on kubernetes that is configured with basic authentication. By default the pod tries to access the kubernetes API securely and expects that the kubernetes API server has been deployed with a CA, certificate files and service account key. In order to change this behavior, edit the `kubernetes-cockpit.json` and change the `KUBE_INSECURE` environment variable to `true`.

You can retrieve the address where you can access the dashboard via:

    $ kubectl get service kubernetes-cockpit

## Used as an Openshift Pod

The Kubernetes dashboard can be deployed as a pod on Openshift, and use Openshift OAuth authentication. Running software on Openshift requires forethought, planning and configuration. In particular, in order to run the admin interface as a pod you need to first decide the host name that it will be accessible at. This is the host name part of its URL.

Next use the following commands to deploy the registry pod and service. You'll need to have admin access to the Openshift cluster, as an OAuth client needs to be created. Replace the `XXX` with the host name you want to make the registry accessible at. In addition replace `YYY` with the host name of the Openshift API server.

    $ wget https://raw.githubusercontent.com/cockpit-project/cockpit/master/containers/openshift-cockpit.template
    $ oc process -f openshift-cockpit.template -p COCKPIT_KUBE_URL=https://XXX -p OPENSHIFT_OAUTH_PROVIDER_URL=https://YYY:8443 | oc create -f -

You can retrieve the address where you can access the dashboard via:

    $ oc get service openshift-cockpit