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21-Practice-Test-CoreDNS-in-Kubernetes.md

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Practice Test CoreDNS in Kubernetes

  • Take me to Lab

Solution

  1. Check the Solution

    Details 
    CoreDNS

  2. Check the Solution

    Details 
    2

  3. Check the Solution

    Details 
    10.96.0.10

  4. Check the Solution

    Details 
    /etc/coredns/Corefile

OR

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

  5. Check the Solution

    Details 
    Configured as a ConfigMapObject

  6. Check the Solution

    Details 
    CoreDNS

  7. Check the Solution

    Details 
    coredns

  8. Check the Solution

    Details 
    cluster.local

  9. Check the Solution

    Details 
    Ok

  10. Check the Solution

    Details 
    web-service

  11. Check the Solution

    Details 
    web-serivce.default.pod

  12. Check the Solution

    Details 
    web-service.payroll

  13. Check the Solution

    Details 
    web-service.payroll.svc.cluster

  14. Check the Solution

    Details 
    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

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