Gitlab agent for Kubernetes - kube context wrong cluster name

Infrastructure as Code & Cloud Native
1

Hi all,
I have a Omnibus Gitlab CE 14.10.5 running with docker compose on premise
It works fine, I enabled KAS
On my Gitlab I create a project “setup_gitlab_agent” with a file .gitlab/agents/testagent/config.yaml

observability:
    logging:
        level: debug
ci_access:
    projects:
    - id: jack.chuong/setup_gitlab_agent

Go to Infrastructure → Kubernetes clusters → Agent → Connect a cluster (agent) → choose “testagent” above .
I connect to my k8s cluster on premise and install Gitlab agent

kubectl create ns gitlab-agent
helm upgrade --install gitlab-agent gitlab/gitlab-agent \
    --namespace gitlab-agent \
    --set config.token=****** \
    --set config.kasAddress=ws://gitlab.mydomain.com/-/kubernetes-agent/ \
    --set image.tag=v14.10.0

testagent Connection status : Connected

In my project “setup_gitlab_agent” , I create .gitlab-ci.yml

stages:
  - deploy
 
 deploy:
  stage: deploy
  image:
    name: bitnami/kubectl:latest
    entrypoint: [""]
  script:
    - kubectl config get-contexts
    - kubectl config use-context jack.chuong/setup_gitlab_agent:testagent
    - kubectl get pods
  when: manual

I run pipeline and get error

$ kubectl config get-contexts
CURRENT   NAME                                       CLUSTER   AUTHINFO   NAMESPACE
          jack.chuong/setup_gitlab_agent:testagent   gitlab    agent:6    
kubectl config use-context jack.chuong/setup_gitlab_agent:testagent
Switched to context "jack.chuong/setup_gitlab_agent:testagent".
ubectl get pods
E0328 08:24:34.174016      48 memcache.go:265] couldn't get current server API group list: the server has asked for the client to provide credentials

The cluster name “gitlab” in kube context is wrong , it should be “kubernetes” - my kubernetes cluster name.

I tried to edit .gitlab-ci.yml

 stages:
  - deploy
 
 deploy:
  stage: deploy
  image:
    name: bitnami/kubectl:latest
    entrypoint: [""]
  script:
    - kubectl config get-contexts
    - kubectl config set-context jack.chuong/setup_gitlab_agent:testagent --cluster=kubernetes --namespace=default --server="https://k8s.mydomain.com:6443"
    - kubectl config get-contexts
    - kubectl config use-context jack.chuong/setup_gitlab_agent:testagent
    - kubectl config view
    - kubectl get pods
  when: manual

This is pipeline error output

kubectl config get-contexts
CURRENT   NAME                                       CLUSTER   AUTHINFO   NAMESPACE
          jack.chuong/setup_gitlab_agent:testagent   gitlab    agent:6    
kubectl config set-context jack.chuong/setup_gitlab_agent:testagent --cluster=kubernetes --namespace=default --server="https://k8s.mydomain.com:6443"
Context "jack.chuong/setup_gitlab_agent:testagent" modified.
kubectl config get-contexts
CURRENT   NAME                                       CLUSTER      AUTHINFO   NAMESPACE
          jack.chuong/setup_gitlab_agent:testagent   kubernetes   agent:6    default
kubectl config use-context jack.chuong/setup_gitlab_agent:testagent
Switched to context "jack.chuong/setup_gitlab_agent:testagent".
kubectl config view
apiVersion: v1
clusters:
- cluster:
    server: http://gitlab.mydomain.com/-/kubernetes-agent/k8s-proxy/
  name: gitlab
contexts:
- context:
    cluster: kubernetes
    namespace: default
    user: agent:6
  name: jack.chuong/setup_gitlab_agent:testagent
current-context: jack.chuong/setup_gitlab_agent:testagent
kind: Config
preferences: {}
users:
- name: agent:6
  user:
    token: REDACTED
kubectl get pods
E0328 09:10:08.542297      65 memcache.go:265] couldn't get current server API group list: Get "http://localhost:8080/api?timeout=32s": dial tcp 127.0.0.1:8080: connect: connection refused

I did something wrong ? Please give me some advice, thank you very much.

2

I found the solution : Gitlab must be hosted from https and also agent should be directed to wss address. kubectl does not send authorization header if target is http