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How does a CVO cluster use NTP?

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Applies to

  • Cloud Volumes ONTAP (CVO)
  • Network Time Protocol (NTP)

Answer

The NTP services for a CVO cluster are done in the back end by the cloud provider, then provided through the respective networking that is provided to the VM instances.  Their settings and methodology are not directly visible to the CVO cluster.
 
Additional details:

Q1)  How do we know what the NTP servers are, i.e. NIST, etc.?
A1)   What is actually being used for the source of the NTP is defined by the cloud provider.  Only the respective provider can reveal the actual servers being used.
 
Q2)  Is it recommended to set an NTP server on a Cloud Volumes ONTAP system, like with an on-prem cluster?
A2)  NTP servers are already configured by default for all new Cloud Volumes ONTAP deployments in AWS and Google Cloud. For Microsoft Azure deployments, as well as existing deployments, it is recommended to configure the NTP server manually. This is to ensure reliable time synchronisation and avoid potential service disruptions.
 
Q3)  Is there a way to add an additional NTP server using NetApp Console?
A3)  Only if you are creating a CIFS server and want an external time server.  Referencing  the  Cloud Volumes ONTAP documentation: 

  • Step 4, b. Protocol section; then select CIFS.  You have to use your configured AD DNS. 
  • If a source other than the configured AD DNS is desired, then this can be done using the Netapp Console API (see the ‘Setup NTP server’ for the respective cloud provider).

Additional Information

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