DNS/NTP configuration workflow in SDDC Manager fails on vRealize components

Products

• VMware Cloud Foundation

Issue/Introduction

Symptoms:
While trying to make DNS/NTP configuration changes the workflows fails. The rollback of existing configuration on the vRealize suite products is not supported thus leaving the affected products in an inconsistent state.

Environment

VMware Cloud Foundation 3.7.x

Resolution

The following information provides manual guidance on how to recover from DNS/ NTP configuration failures of vRealize products.

vRealize Log Insight (vRLI):

• For DNS, please use the following instructions.
• For NTP, please use the following instructions.

VRealize Operations Manager (vROps):

• For DNS, please use the following KB article https://kb.vmware.com/s/article/2115840.
• For NTP, please use the steps below:

1. Log in to vRealize Operations Manager by using the operations interface.
2. On the main navigation bar, click Administration.
3. In the left pane of vRealize Operations Manager, expand Management and click Cluster Management.
4. Select Network Time Protocol Settings from the Actions menu.
5. In Global Network Time Protocol Settings dialog box, enter NTP Server Address.

vRealize Lifecycle Manager (vRSLCM):

• For DNS, use the same steps in vROps KB https://kb.vmware.com/s/article/2115840 to similarly modify the vRSLCM vApp properties.

• For NTP, please use the steps below:

1. Connect to the vRealize Suite Lifecycle Manager appliance through SSH with the root user.
2. Configure the NTP source for the vRealize Suite Lifecycle Manager appliance.
3. Open /etc/systemd/timesync.conf in vi editor:

vi /etc/systemd/timesyncd.conf

4. Look for the line similar to below change the entry to the correct NTP server:

NTP=ntp.sfo01.domain.local

5. Restart systemd-timesyncd service:

systemctl restart systemd-timesyncd

6. Type timedatectl status to verify the state of the service.

vRealize Automation (vRA):

• For DNS in a Linux appliance, please use the steps below:

1. Navigate to the Appliance Management Interface page and login:

https://vracafe1.domain.local:5480 

2. Open Network-> Address-> Change DNS servers and provide the correct DNS information.
3. Click Save Settings.

 

• For NTP in a Linux appliance, please use the steps below:

1. Navigate to the Appliance Management Interface page and login:

https://vracafe1.domain.local:5480 

2. Open Admin-> Time settings and provide the correct NTP information.
3. Click Save Settings.

 

• For a Windows vRA VM, please use Microsoft recommendations for changing NTP and DNS on Windows Servers.