PowerFlex: How to Modify DNS Entries

• Modifying the DNS entries in the embedded operating system

Modify or update the DNS entries in the embedded operating system.

1. SSH to the embedded operating system running on the SDS.
2. Go to the file path: 

   sudo vi /etc/sysconfig/network/config

3. Add or modify the line:
   • NETCONFIG_DNS_STATIC_SEARCHLIST=xxx.com, where xxx.com is the domain name
   • NETCONFIG_DNS_STATIC_SERVERS=x.x.x.x y.y.y.y, where x.x.x.x y.y.y.y is the DNS server IP address
4. Press Esc and type :wq to save the file.
5. Type sudo netconfig update -f to refresh and update the configuration.

• Modifying DNS entries in the management virtual machines

Modify or update the DNS entries in the management virtual machines.

1. SSH to each of the management virtual machines nodes.
2. To view the existing entries of the DNS, type: 

   sudo cat /etc/sysconfig/network/config | grep -i NETCONFIG_DNS_STATIC

3. To add or update the DNS entries:
   1. Go to the file path, type: 

      sudo vi /etc/sysconfig/network/config

   2. Add or modify the line:
      • NETCONFIG_DNS_STATIC_SEARCHLIST=xxx.com, where xxx.com is the domain name
      • NETCONFIG_DNS_STATIC_SERVERS=x.x.x.x y.y.y.y, where x.x.x.x y.y.y.y is the DNS server IP address
   3. Press Esc and type :wq to save the file.
   4. Type sudo netconfig update -f to refresh and update the configuration.
4. Update the coredns pods on all the management virtual machines after making the DNS entry change for the pods in internal resolutions.Type the following command to view the pod names.

   kubectl get pods -n kube-system | grep rke2-coredns-rke2-coredns

5. To restart the coredns pods, delete them by typing

   kubectl delete pods <pod-name> -n kube-system

    

   The pods will recreate themselves after deletion.

• Modifying the DNS entries in VMware vCenter

Modify the VMware vCenter DNS using VAMI.

1. Log in to VMware vCenter VAMI: https://vcenter_ip_or_FQFN:5480.
2. Go to the Networking section and in Network Settings, click Edit.
3. From Edit Network Settings, select Network Adapter and click Next
4. In Edit Settings, expand the Hostname and DNS field, make the changes, and click Next.
5. In SSO credentials, enter the administrator credentials, for example, administrator@vsphere.local.
6. In Ready to Complete, review the changes, accept the acknowledgment, and click Finish.
7. A window appears with the message Network update in progress. When complete, the window displays Network update succeeded, click Close.

• Modifying the DNS entries in the VMware ESXi host

1. Log in to the VMware ESXi host: https://ESXi_host_ip.
2. Click Networking > TCP/IP Stacks. Select Default TCP/IP stack and click Edit Settings.
3. Under Basic DNS Configuration, select Manually configure the settings for this TCP/IP stack.
4. Add or update the DNS IP addresses in the Primary DNS server and Secondary DNS server fields. In the Search domain field, add the domain name and click Save.

Similar Article: PowerFlex 4.X: How To Update DNS Servers

Dell PowerFlex 4.5.x and PowerFlex Manager 4.8.x Software Administration Guide