Kubernetes Troubleshooting

Question : One of the Nautilus DevOps team members was working on to update an existing Kubernetes template. Somehow, he made some mistakes in the template and it is failing while applying. We need to fix this as soon as possible, so take a look into it and make sure you are able to apply it without any issues. Also, do not remove any component from the template like pods/deployments/volumes etc.

/home/thor/mysql_deployment.yml is the template that needs to be fixed.

Note: The kubectl utility on jump_host has been configured to work with the kubernetes cluster.

Please Note :-  Perform the below commands based on your question server,  user name & other details that might differ. So please read the task carefully before executing it. 

All the Best 👍

Solution:  

1. Check existing running Pods  & Services 

thor@jump_host ~$ kubectl get all NAME                 TYPE        CLUSTER-IP   EXTERNAL-IP   PORT(S)   AGE service/kubernetes   ClusterIP   10.96.0.1    <none>        443/TCP   54m thor@jump_host ~$

2. Secrets is by default created in lab 

thor@jump_host ~$ kubectl get secrets NAME                  TYPE                                  DATA   AGE default-token-6mkjk   kubernetes.io/service-account-token   3      55m mysql-db-url          Opaque                                1      2m36s mysql-root-pass       Opaque                                1      2m37s mysql-user-pass       Opaque                                2      2m36s thor@jump_host ~$

3. To identify the issue in template , split in to each kind and troubleshoot further 

thor@jump_host ~$ cp mysql_deployment.yml pv.yml thor@jump_host ~$ cp mysql_deployment.yml pvc.yml thor@jump_host ~$ cp mysql_deployment.yml service.yml thor@jump_host ~$ cp mysql_deployment.yml deploy.yml thor@jump_host ~$

4. Create a YAML  file with all the parameters, Kindly do the changes as per task

you can copy from GitLab    https://gitlab.com/nb-tech-support/devops.git

    ( Refer Below Video for more clarity )

5.  Click on Finish & Confirm to complete the task successfully

Happy Learning!!!!

Apart from this if you need more clarity,  I have made a  tutorial video on this, please go through and share your comments. Like and share the knowledge