How to Deploy from Gitlab-ci to multiple kubernetes namespaces?

Question

I have two variable containing my namespaces names:

$KUBE_NAMESPACE_DEV ="stellacenter-dev"
$KUBE_NAMESPACE_STAGE "stellacenter-stage-uat" 

Now I want to modify the following .gitlab-ci.yaml configuration to include the namespace logic:

deploy_dev:
  stage: deploy
  image: stellacenter/aws-helm-kubectl
  before_script:
    - aws configure set aws_access_key_id ${DEV_AWS_ACCESS_KEY_ID}
    - aws configure set aws_secret_access_key ${DEV_AWS_SECRET_ACCESS_KEY}
    - aws configure set region ${DEV_AWS_DEFAULT_REGION}
  script:
    - sed -i "s/<VERSION>/${CI_COMMIT_SHORT_SHA}/g" provider-service.yml     
    - mkdir -p  $HOME/.kube
    - cp $KUBE_CONFIG_DEV $HOME/.kube/config
    - chown $(id -u):$(id -g) $HOME/.kube/config 
    - export KUBECONFIG=$HOME/.kube/config
    - kubectl apply -f ./provider-service.yml 
  only:
    - developer  

Provide-service.yml file

apiVersion: apps/v1
kind: Deployment
metadata:
  name: provider-app
  namespace: "stellacenter-dev" or "stellacenter-stage-uat" 
  labels:
    app: provider-app
spec:
  replicas: 1
  selector:
    matchLabels:
      app : provider-app
  template:
    metadata:
      labels:
        app: provider-app
    spec:
      containers:
      - name: provider-app
        image: registry.gitlab.com/stella-center/backend-services/provider-service:<VERSION>
        imagePullPolicy: Always
        ports:
          - containerPort: 8092
      imagePullSecrets:
        - name:  gitlab-registry-token-auth

---

apiVersion: v1
kind: Service
metadata:
  name:  provider-service
  namespace: "stellacenter-dev" "stellacenter-stage-uat" 
spec:
  type: NodePort
  selector:
    app:  provider-app
  ports:
  - port:  8092
    targetPort:  8092

I don't know how to integrate the variables and the values correctly . I'm facing the error while I run pipeline.Kindly help me to sort it out.

Answer 1

You can remove the namespace: NAMESPACE from the manifest, and apply the resource in a namespace using the commandline.

- kubectl apply -f ./provider-service.yml -n ${KUBE_NAMESPACE_DEV}
- kubectl apply -f ./provider-service.yml -n ${KUBE_NAMESPACE_STAGE}