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

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Practice Test CoreDNS in Kubernetes

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