Update the vmotion/vsan IP address in SDDC manager after changes made to VMK on Vcenter server for ESXi host

Products

• VMware SDDC Manager

Issue/Introduction

After updating a VMkernel IP address for vMotion or vSAN within vCenter, the changed IP is not automatically reflected in the SDDC Manager inventory. This can lead to inconsistencies between the physical environment and the SDDC Manager database. The following guidance is intended to help you manually update the SDDC Postgres database to ensure it aligns with the changes made in vCenter.

Environment

SDDC Manager 5.2

Cause

Because these modifications were performed outside of SDDC Manager, the IP changes will not be reflected in the SDDC Postgres database. If IP addresses have been updated on the ESXi hosts from the Workload Domain (WLD) vCenter, those updates must also be carried out on the SDDC database to maintain environment consistency. These records must be manually updated to ensure future tasks remain functional.

Resolution

The resolution requires updating database tables. Please contact Broadcom support  for assistance as there are some internal steps that are needed to be executed.

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The steps provided in the workaround involve changes to the SDDC Manager database. Incorrectly executed commands, commands with incorrect data have the potential to cause irreparable damage to the VCF Environment. Please do not proceed without taking a snapshot of the SDDC Manager VM, and ideally a full file based backup of the SDDC Manager.

Before making any IP related changes :

Carry out a Test vmkping commands to this host being updated from an existing host already setup in the cluster :

• vmkping -I vmk0  <host management ip>
• vmkping -I vmkx  <Host vMotion IP>
• vmkping -I vmky  <host vSAN IP>

Vmk0 is normally Management, You will need to identified and confirmed for the customers environment for vMotions and vSAN vmk assignments to carry out these tests

Once tests have been confirmed and working you can then go ahead and follow the next steps in order to change the IP addresses from vCenter UI and also from the SDDC DB

vCenter changes:

• • Connect to the vCenter in question with your web Browser
  • Locate the host being worked on (one at a time)
  • Click on Configure > Vmkernal Adapters and select the 3 dots next to the vMotion or vSAN adapter
  • Click edit
  • Update the IPv4 setting for the host
  • Click OK to save changes
  • Once the changes have been made
  • Test again with a vmkping -I vmkx <vMotion/vSAN_ip_address>

 

Additional Information

• Snapshot of the SDDC manager is required before this work is done
• Checks must be done before hand to make sure the existing network Pool has spare IPs free. (for vMotion or vSAN- depending on situation)
  • If not this must be extended or updated :
    • Add or Remove a Network Pool IP Address Range
• All work must be done:
  • one host at a time 
  • one IP change at a time
• Test with vmkping -I vmkY x.x.y.Z after each change of IP address