In this blog, we will show you the steps to edit and delete the replication controller in the Kubernetes environment.
REQUIREMENTS
- 2 Node Cluster ( 1 Master VM with 2 Nodes)
- Kubernetes Components
INFRASTRUCTURE OVERVIEW
- We have already installed and configured the 2 Node cluster in our demo environment.
- Please check the URL https://blog.assistanz.com/cloud-computing/steps-to-install-kubernetes-cluster-manually-using-centos-7/ for more information.
REPLICATION CONTROLLER OVERVIEW
- We have already created a replication controller in our environment.
- Currently, there are four PODs available in this replication controller. It created pods on both nodes randomly.
EDITING REPLICATION CONTROLLER
- Use the below command to edit the replication controller.
Syntax: kubectl edit rc <replication controller name>
Example: kubectl edit rc rep-pod
- It opens in the default text editor.
- We are editing the total number of replicas from 4 to 6.
- Save and close the file.
- After few minutes, we can see two new pods are in running status.
- We can also scale down the PODS by editing the replication controller.
- Now we can see the excess POD’s are terminating.
DELETING THE REPLICATION CONTROLLER
- Use the below command to delete a replication controller.
Syntax: kubectl delete rc <replication controller name>
Example: kubectl delete rc rep-pod
- Replication controller deleted successfully.
- Also, there are no pods are available related to the replication controller.
DELETING REPLICATION CONTROLLER WITHOUT DELETING THE PODS
- Use the below command to delete the replication controller without deleting the pods.
Syntax: kubectl delete rc <replication controller name> --cascade=false
Example: kubectl delete rc rep-pod --cascade=false
- Command executed successfully.
- You can see the POD’s are available after deleting the replication controller.
EXTERNAL LINKS
https://kubernetes.io/docs/concepts/workloads/controllers/replicationcontroller/
VIDEO
Thanks for reading this blog. We hope it was useful for you to learn about the steps to Edit and Delete the Replication controller.
