Exemplo kubernetes deploy (pelo gitlab)

.gitlab-ci.yml

deploy_dev:
  stage: deploy
  dependencies:
    - test
  environment:
    name: Development
  image: alpine
  script:
    # Environment variables
    - export DOMAIN=$(echo "$CI_ENVIRONMENT_URL" | sed -e 's|^https://||;s|/.*$||')
    - export NAMESPACE=$(echo "$DOMAIN" | sed -e 's|[.]|-|g')
    # Install kubectl
    - apk add --no-cache curl
    - curl -LO $K8S_STABLE_VERSION_URL
    - chmod +x ./kubectl
    - mv ./kubectl /usr/local/bin/kubectl
    # Setup cluster config
    - mkdir ~/.kube
    - echo $NP_KUBE_CONFIG |
      base64 -d - |
      sed -e 's|###NAMESPACE###|'"$NAMESPACE"'|g' > ~/.kube/config
    # Test kubectl connection to the cluster
    - kubectl cluster-info
    # Create gitlab registry secret
    - kubectl create secret docker-registry gitlab-registry
      --docker-server=$CI_REGISTRY
      --docker-username=$CI_DEPLOY_USER
      --docker-password=$CI_DEPLOY_PASSWORD
      --docker-email=$GITLAB_USER_EMAIL
      -o yaml
      --dry-run | kubectl apply -f -
    # Deploy the app
    - sed '
      s|###NAME###|'"$CI_PROJECT_NAME"'|g;
      s|###CONTAINER_IMAGE###|'"$IMAGE:$VERSION"'|;
      s|###LOAD_BALANCER_IP###|'"$DEVELOPMENT_LOAD_BALANCER_IP"'|;
      s|###DATABASE_CONNECTION###|'"$DEVELOPMENT_DB_CONNECTION"'|;
      s|###DATABASE_NAME###|'"$DEVELOPMENT_DB_NAME"'|;
      s|###FILESYSTEM_CONNECTION###|'"$DEVELOPMENT_FS_CONNECTION"'|;
      s|###FILESYSTEM_LOGS###|'"$DEVELOPMENT_FS_LOGS"'|;
      ' k8s-deploy-dev.yml > kubernetes.yml
    - kubectl apply -f kubernetes.yml
    - rm kubernetes.yml

K8S_STABLE_VERSION_URL: https://storage.googleapis.com/kubernetes-release/release/v1.10.4/bin/linux/amd64/kubectl

Thank you mate! You're a star!