<s>[INST] This is part of an online discussion.  A question was asked on how to move zero-cost contracts to a new openstack environment.  These contracts are referred to as "metered instances" which take into account underlying usage of things like compute power.  

Someone made the following response:  "We've got a tool called "contract_reconciler" that can help with that. It does a great job of re-associating the metered instances, but its a bit of a manual process".

Another person responded with the following:  "We evaluated contract_reconciler and it just didn't work for us. They were recommending to just delete the old environment and rebuild from scratch".

Now it's my turn to provide a response.  

Here is my response.  

"I actually have had success with contract_reconciler for the specific scenario of moving metered instances to a new openstack environment.  Given that it is a manual process, having clear and concise documentation and a keen eye for detail are essential.  While it does take some time and effort to migrate the instances, it is definitely worth the investment to preserve the historical usage data.

I also thought the rebuild from scratch approach was a bit drastic.  I can see how that might be feasible in very small environments, but for larger environments, it seems like a huge undertaking that would be prone to errors and inconsistencies.  Plus, you'd likely end up with duplicate or incorrect data being reported.

I'd be more than happy to walk through how we set up contract_reconciler and provide some tips and tricks that we learned along the way if anyone is interested."

Here's a question: What are the two approaches discussed for moving metered instances to a new openstack environment?[/INST]