Can we run sonobuoy to be k8s conformance on a Rancher cluster

Question

We setup a rancher cluster with 3 nodes for testing and I would like to apply for k8s conformance using this rancher cluster. However, while running sonobuoy it returns error

ERRO[0000] could not create sonobuoy client: failed to get rest config: invalid configuration: no configuration has been provided 

It seems like Rancher does not have any kubernates binaries built-in (Kubectl, kubeadm etc). May I know if it is possible to be k8s conformance on a rancher cluster?

Answer 1

You should have kubeernetes cluster kubeconfig localy where you are running sonobuoy.

from Rancher documentation: How to Manage Kubernetes With Kubectl:

RKE:

When you create a Kubernetes cluster with RKE, RKE creates a kube_config_rancher-cluster.yml file in the local directory that contains credentials to connect to your new cluster with tools like kubectl.

You can copy this file to $HOME/.kube/config or, if you are working with multiple Kubernetes clusters

Rancher-Managed Kubernetes Clusters:

Within Rancher, you can download a kubeconfig file through the web UI and use it to connect to your Kubernetes environment with kubectl.

From the Rancher UI, click on the cluster you would like to connect to via kubectl. On the top right-hand side of the page, click the Kubeconfig File button: Click on the button for a detailed look at your config file as well as directions to place in ~/.kube/config.

Upon copying your configuration to ~/.kube/config, you will be able to run kubectl commands without having to specify the –-kube-config file location:

Check First launch with sonobuoy requests for a configuration - maybe it will be useful for you.

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Also, look here - just for you: Conformance tests for Rancher 2.x Kubernetes

Run Conformance Test

1. Once you Rancher Kubernetes cluster is active, Fetch it's kubeconfig.yml file and save it locally.

2. Download a sonobuoy binary release of the CLI, or build it yourself by running:

   $ go get -u -v github.com/heptio/sonobuoy

3. Configure your kubeconfig file by running:

   $ export KUBECONFIG="/path/to/your/cluster/kubeconfig.yml"

4. Run sonobuoy:

   $ sonobuoy run

5. Watch the logs:

   $ sonobuoy logs

6. Check the status:

   $ sonobuoy status

7. Once the status commands shows the run as completed, you can download the results tar.gz file:

   $ sonobuoy retrieve