In this blog, We will show you the Steps to create a Replication Controller using YAML in Kubernetes Environment.
- 2 Node Cluster ( 1 Master VM with 2 Nodes)
- Kubernetes Components
- We have already installed and configured the 2 Node cluster in our demo environment.
- Please check the URL https://www.assistanz.com/steps-to-install-kubernetes-cluster-manually-using-centos-7/ for more information
REPLICATION CONTROLLER CREATION
- Log in to the kubernetes master server through putty.
- Create a YAML file using the default editor.
- Add the below coding and save it.
- name: rep-cont
- Execute the below command to create a replication controller using YAML file.
Syntax: kubectl apply -f <filename with extension>
Example: kubectl apply -f rc.yml
- Command executed successfully.
- All the PODs will be in creating status.
- After few seconds, all the PODs are in running status.
VERIFYING REPLICATION CONTROLLER
- Use the below command to view the list of replication controllers.
kubectl get rc
Note: rc is the short-hand of replication controller
- Describe command will use to view the detailed information about the replication controller.
Syntax: kubectl describe rc <replication controller name>
Example: kubectl describe rc rep-pod
DELETING THE REPLICATION POD
- Currently, there are four POD’s available in our demo replication controller.
- Let’s delete a POD and see how kubernetes reacts.
- Kubernetes will start creating a new POD automatically. Kubernetes will keep on checking the desired state. When the desired state fails, kubernetes takes own action to restore the state.
- After few seconds, the new POD is in running status and replaced the old one.
Thanks for reading this blog. We hope it was useful for you learn about creating a replication controller using YAML file in the kubernetes environment.