We evaluated infoblox and after some tinkering we got to work as designed, it took us a little while since we have an HA vRA environment. We found limitations only being able to tie one domain to the registration when allocating to a single ip network. Our requirement is mixing different OS's on a network, which were in different DNS domains. We'll continue to monitor, I think Infoblox is doing some good work, they have a rich API and as the plugin matures, we'll look again.
We ended up using vRA for IPAM and script to register / deregister DNS records for now. We did use event broker two different subscriptions, two workflows and a script on powershell host. I probably could make it streamlined, but the way we used it, our biz needs were met. Sounds like a good blog article 
might need to do that.
PS - our DNS infra is Microsoft. The powershell cmdlets for dns made it easy.
for summary
- One event broker subscription tied to Requested running the add to DNS workflow, you'll need to fit conditions on the event subscription so your vm runs this script
- One event broker subscription tied to the Destroy option running the remove workflow. you'll need to fit conditions on the event subscription so your vm runs this script
- A script on the powershell host both workflows calls
- Add properties to add debugging information to each workflow on the blueprint to retrieve necessary data for the script. I used a property group. Here is an article https://extendingclouds.com/vrealize-automation-7-custom-email-notifications-with-the-event-broker/
- Grant necessary perms on the DNS zone (Microsoft) to add / remove records
Hope this helps.
https://www.viktorious.nl/2016/10/12/automated-dns-registration-with-vra/ is a example.