After deploying a cluster of dynamic nodes with external storage, you must follow KB 000185917 to call primary storage provision API "rest/vxm/v1/system/primary-storage" to set up VxRail cluster primary storage and enable VxRail Day 2 operations.
The API call may hit 504 gateway time-out error.
During performing the primary storage provision API, virtual machines like VxRail manager and internal vCenter migrate to the external storage.
In some limited network environments, the VM migration task may take an extended time and cause the API call timeout.
After triggering the primary storage provision API, a virtual machine relocation task is started, you can monitor the task from vCenter UI.
After the task is successfully completed, follow KB 000185917 to call the primary storage provision API again.
Before VxRail 8.0.210, the primary storage provision API timeout value is 10 minutes.
From VxRail 8.0.210, the primary storage provision API timeout value is increased to 60 minutes to mitigate the possible timeout issue.