21-Practice-Test-CoreDNS-in-Kubernetes

Practice Test CoreDNS in Kubernetes

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Solution

1. Check the Solution

   CoreDNS
   

2. Check the Solution

   2
   

3. Check the Solution

   10.96.0.10
   

4. Check the Solution

   /etc/coredns/Corefile
   
   OR
   
   kubectl -n kube-system describe deployments.apps coredns | grep -A2 Args | grep Corefile
   

5. Check the Solution

   Configured as a ConfigMapObject
   

6. Check the Solution

   CoreDNS
   

7. Check the Solution

   coredns
   

8. Check the Solution

   cluster.local
   

9. Check the Solution

   Ok
   

10. Check the Solution

    web-service
    

11. Check the Solution

    web-serivce.default.pod
    

12. Check the Solution

    web-service.payroll
    

13. Check the Solution

    web-service.payroll.svc.cluster
    

14. Check the Solution

    kubectl edit deploy webapp
    
    Search for DB_Host and Change the DB_Host from mysql to mysql.payroll
    
    spec:
      containers:
      - env:
        - name: DB_Host
          value: mysql.payroll
    

15. Check the Solution

    kubectl exec -it hr -- nslookup mysql.payroll > /root/nslookup.out