Netbox plugin: XO tries to create an already existing IP address

r10n_fumo

Hello,

I believe there is an issue with Netbox synchronization plugin. In short, Xen Orchestra does not appear to check if an address of a newly-created VM is already in Netbox and blindly tries to create it. This makes the whole IP address creation step fail for all other VMs even during subsequent synchronizations.

Steps to reproduce the issue:

Create an address in Netbox
Create a VM in XO with the address from the previous step
Run synchronization
You will see a "400 Bad Request" error with a message stating that "Duplicate IP address found in global table"
Xen Orchestra creates your VM with an interface in Netbox, but fails to create and assign the IP address.

I think there are two ways to fix the issue: You could either make XO "adopt" the address when it has to be assigned to a VM, or you could delete the address and create it again. I Think the latter makes more sense as that would strip away all attributes (i.e. tags) which could no longer be correct after the address is assigned to a virtual machine.

I am using a source-built version of XO.

Netbox version: 4.2.7
Xen Orchestra commit: 3c54363

Thanks

olivierlambert

Hi,

It was never meant to be a 2 ways synchronization plugin. Making it 2 ways considerably raise the complexity of such plugin (because we would need to make configuration for decision on when to take it one way and the other, and each use case is different).

I would say: you shouldn't have any IP that's already in Netbox from other source in the IP range that's used for your VMs.