vCenter, vCloud Director, VMware

SYSTEM_REFRESH_VIMSERVER – Could not register vCloud Director as an extension to vCenter Server

This post has been moved to https://www.funkycloudmedina.com

While trying to troubleshoot another problem, we tried Refreshing vCloud to vCenter which includes registering/updating the extension. This is when we hit a beauty we’d never seen before:

vimserver refresh

Alright, calm down. Probably something with the network, right? And  if it’s not the network then it’s probably DNS. Right? Wrong.

I dug around in the vCenter MOB and found the vCloud Director extension. As expected it already had a “vCloud Director-1” named extension. What I found odd was the last heartbeat time was back in 2013. Interestingly enough the last version recorded was also v5.1.2. I say interestingly because we are running v8.10.1 for SP.

Jumping into our test environment, I performed a Refresh of our test vCloud instance to vCenter and lo and behold it happened there too! I couldn’t find anything in the vCloud logs reporting the why behind this failure, but I needed to get this running and quick, too.

Knowing that the vCloud DB stores its own references to the vCenter MOB, and that vCloud would try to register itself as vCloud Director-1 again, I theorised that we could remove the existing extension and perform another Refresh without causing any issues.

So, that’s what I did right in the test environment. It went without a hitch. Rolled the same change out in production and it went beautifully.

If you’re getting this error, I’d suggest taking a backup of your vCenter server/DB and removing the existing vCloud Director extension.

Removing the extension (from KB1025360):

  1. In a web browser, navigate to http://vCenter_Server_name_or_IP/mob.
    Where vCenter_Server_name_or_IP/mob is the name of your vCenter Server or its IP address.
  2. Click Content.
  3. Click ExtensionManager.
  4. Select and copy the name of the plug-in you want to remove from the list of values under Properties. For a list of default plug-ins, see the Additional Information section of this article.
  5. Click UnregisterExtension. A new window appears.
  6. Paste the key of the plug-in and click Invoke Method. This removes the plug-in and results in void.
  7. Close the window.
  8. Refresh the Managed Object Type:ManagedObjectReference:ExtensionManager window to verify that the plug-in is removed successfully

Now go back to vCloud and perform a Refresh against your vCenter server. You should be back in action now!

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vCloud Director, VMware

‘java.lang.NullPointerException’ received when modifying objects in vCloud Director

This post has been moved to https://www.funkycloudmedina.com

Problem

Roughly 2 weeks ago one of our vCloud Director tenants reported an error when attempting to increase a disk on their VM. They were told to contact their cloud administrator (yay). When we tried to perform the increase, we received an error we’d never seen before: “java.lang.NullPointerException”.

javanull

Here is what we checked:

  1. Confirm the tenant Org vDC has the appropriate resources available (this was an ‘Allocation’ style vDC).
  2. Check the status of vCloud to vCenter connection and perform a vCenter Reconnect followed by a Refresh. This actually exposed another issue written about here.
  3. Check Log Insight for entries similar to this. We found the entries, but even after viewing the log in context we couldn’t find a cause or correlated action.
  4. We tested the same changes against other Org vDCs. We found that newly created test Org vDCs were fine and unaffected by whatever the root issue was. Only some of our existing Org vDCs experienced these issues.
  5. We found that it wasn’t limited to disk changes. Performing any action on infrastructure within these affected Org vDCs resulted in the same error.

We spent longer than we should’ve trawling through the vCloud logs, and ended up logging an SR with VMware.

After going through the intricate details of what we were experiencing and the testing we’d performed, VMware requested a copy of our vCloud databases and a list of affected VMs, vApps and Org vDCs.

It was a nail biting few days, but eventually our assigned tech got back to us and found the cause of this error. There was a stale resgroup-id record in the org_prov_vdc table. Let me explain…

Cause

There are 3 tables in the vCloud Director database that track Org vDC entities and their corresponding Org vDC resource pool and the parent vCenter resource pool. These 3 are supposed to be kept up to date/in sync by vCD:

  • vrp – this tracks Org vDC resource pool names in vCenter that correspond to Org vDCs. It also tracks the resource model (allocated, PAYG) and any compute resource settings that are applied to the resource pool.
  • vrp_rp – stores the vrp_id from the vrp table, along with the sub_rp_moref value for that vrp.
  • org_prov_vdc – stores data related more to the Org vDC entity itself (name, description, network pools, VM folder Moref IDs, resource pool Moref IDs etc)

Notice the bolded resource pool Moref IDs” comment above. This is important, as this value should be the same as what’s stored in the sub_rp_moref column in the vrp_rp table.

Disclaimer: all of the steps below were performed with VMware support.

You can find out if a particular Org vDC has a stale record in the org_prov_vdc table by performing the following queries against your vCloud Director database:

SELECT id FROM vrp WHERE name LIKE '%My Org vDC Name%'

This will return the vrp ID for your Org vDC. Replace the bold ID in the following query with the ID you received in the last step:

SELECT sub_rp_moref FROM vrp_rp WHERE vrp_id = 0x31JSD81AA0923NAFV801234UASD2BF76

Note; this ID has been changed to protect the innocent. Yours will differ.

From the above SELECT query, you’ll get a resource group ID similar to this:

resgroup-6000

Run this query to find out what the current value is in org_prov_vdc table. Make sure to change the Org vDC name inside the percent signs.

SELECT sub_rp_moref FROM org_prov_vdc WHERE name LIKE '%My Org vDC Name%'

If the values from the vrp_rp table and the org_prov_vdc table do not match, then you’ve got a stale moref in the org_prov_vdc table.

Fix

To fix this stale record take the resgroup ID, and the Org vDC name and run the following query:

UPDATE org_prov_vdc SET sub_rp_moref = 'resgroup-6000' where name = 'My Org vDC Name'

All done. You should now be able to make changes to your vCloud objects.

If you’d like to find all Org vDCs with stale moref IDs in the database, I’ve written a small query that can do that for you:

SELECT vrp.name as vrpNAME, org_prov_vdc.name as orgprovNAME, vrp_rp.sub_rp_moref as correctMOREF, org_prov_vdc.sub_rp_moref as staleMOREF
FROM vrp
 JOIN org_prov_vdc
 ON vrp.name LIKE '%' + org_prov_vdc.name + '%'
 JOIN vrp_rp
 ON vrp_rp.vrp_id = vrp.id
 
WHERE vrp_rp.sub_rp_moref != org_prov_vdc.sub_rp_moref

 

The root cause for all of this has not been found. I’m hoping VMware support can provide us with a little more information so I can update this post.