Continuous Deployment

To improve deployment in Kubernetes, you can add Spinnaker.

You can quickly deploy this tools in Virtual machine using below instructions.
https://www.mirantis.com/blog/how-to-deploy-spinnaker-on-kubernetes-a-quick-and-dirty-guide/

After that integrate kubernetes,jenkins,gitlab and other tools with spinnaker.
Create a pipeline from spinnaker and check the magic :)