ECS: Problems in finding VDC -or StoragePool related information - VDC Error: No VDC Found

When listing the VDC topology using xDoctor, it reports 'VDC Error: No VDC Found':

admin@lab-ecs01-n01:~> sudo xdoctor --top --vdc

ECS
|
|- CLOUD - ID:[77071b835bb4e0e7c85a1e55e1cxxxxx]
   |
   |- Local VDC - ID:[Unknown] Name:[Unknown]
   |- Local SP  - ID:[d714b08e-1a06-3483-a4ad-fc54f8xxxxx] Name:[LAB-CRK-SP01]
   |  |
   |  |- Local RACK - Name:[red] Master:[169.254.1.1] PSNT:[CKM001.....] SWID:[ELM.....]
   |  |  |
   |  |  |- Node  1, [   provo], NAN.IP:[    169.254.1.1], Public.IP:[  10.x.x.100]
   |  |  |- Node  2, [   sandy], NAN.IP:[    169.254.1.2], Public.IP:[  10.x.x.101]
   |  |  |- Node  3, [    orem], NAN.IP:[    169.254.1.3], Public.IP:[  10.x.x.102]
   |  |  |- Node  4, [   ogden], NAN.IP:[    169.254.1.4], Public.IP:[  10.x.x.103]
   |  |  |- Node  5, [  layton], NAN.IP:[    169.254.1.5], Public.IP:[  10.x.x.104]

Error: Problems in finding VDC -or StoragePool related information ...
VDC Error: No VDC Found.

Cause 1:
This would indicate a new install and no VDC is configured yet:

admin@lab-ecs01-n01:~> /opt/emc/xdoctor/tools/ee_scripts/svc_tools/svc_vdc list -detail
svc_vdc v1.0.20 (svc_tools v1.6.8)                 Started 2020-01-12 10:49:10

Name: Unknown
  Local VDC:                  True

  Serial #:                   CKM001.....
  ECS Release:                3.3.0.1 GA
  Object Version:             3.3.0.1-109311.635bd4c
  VDC ID:                     Unknown
  Short form VDC ID:          Unknown
  TSO Status:                 Healthy

  Storage pools (cos):
  LAB-CRK-SP01                urn:storageos:VirtualArray:d714b08e-1a06-3483-a4ad-fc54f8xxxxx

    managementEndPoints       interVdcCmdEndPoints      interVdcEndPoints

Cause 2:
If this is an installed VDC, xDoctor can have issues with creating the model file which the topology command (and other functions) use.

Resolution for Cause 1:
Confirm if this is a new install by connecting to the ECS user interface and verify if a Virtual Data Center (VDC) has been configured:


If this is the case, 'VDC Error: No VDC Found' on the VDC topology using xDoctor is expected.

Resolution for Cause 2:
If this is an installed VDC, we need to clear out some of the cache files and recreate them successfully.

Here the model_cache.xml file was not being populated.

# cd /usr/local/xdoctor

# cat config/model_cache.xml
<model cloud="88183b946cc5f0e8c96b2e66e1c74a7e" id="ECS" name="Elastic Cloud Storage" ts="1680862358"><error>
    <code>10001</code>
    <description>An error occurred while encoding/decoding of tokens</description>
    <details>Unable to decode token.</details>
    <retryable>false</retryable>
</error><error>
    <code>10001</code>
    <description>An error occurred while encoding/decoding of tokens</description>
    <details>Unable to decode token.</details>
    <retryable>false</retryable>
</error><error>
    <code>10001</code>
    <description>An error occurred while encoding/decoding of tokens</description>
    <details>Unable to decode token.</details>
    <retryable>false</retryable>
</error></model>emc@belbchecs01:/usr/local/xdoctor> sudo rm config/model_cache.xml

If the case, removing the model_cache.xml and the xDoctor token cache file will resolve the issue:

# sudo rm config/model_cache.xml
# sudo rm .rest_token
# cat config/model_cache.xml

Verify listing the VDC topology using xDoctor works:

# sudo xdoctor --top
# sudo xdoctor --top --vdc
# sudo xdoctor --top --details