How do I configure my Kubernetes cluster to work with Gitlab CI?

Question

I'm learning how to use Kubernetes and Gitlab CI/CD so I installed a Gitlab agent into my Kubernetes cluster by following the documentation. I wrote a simple hello world pipeline to see if it works

image: "docker.io/ubuntu"

stages:
  - build

build-contabo:
  stage: build
  script:
    - echo "hello world"

But the pipeline won't run and complains about missing configuration:

Running with gitlab-runner 14.6.0 (5316d4ac)
  on vmi769777 NWjdRisx
Preparing the "kubernetes" executor 00:09
WARNING: Namespace is empty, therefore assuming 'default'.
Using Kubernetes namespace: default
ERROR: Preparation failed: getting Kubernetes config: invalid configuration: no configuration has been provided, try setting KUBERNETES_MASTER environment variable

I read on how to configure an agent, but could not find anything addressed this error. I also deployed a hello world kubernetes deployment to check if my cluster does not work, but it ran successfully.

How can I provide configurations so that my pipeline runs? And is this a problem with the Kubernetes Cluster or the Gitlab configuration?

Answer 1

Have you tried setting KUBE_CONFIG_PATH? I was getting the same error, but export KUBE_CONFIG_PATH=/path/to/kubeconfig seems to fix the issue.