Flintlock is failing with Firecracker v1.5.0

[richardcase]

What happened:

When using the latest version of flintlock with Firecracker v1.5.0 its failing to properly start a VM.

Seeing errors like this in the flintlock logs:

2025/11/27 19:12:08 ERROR: Failed to extract ServerMetadata from context
...
time="2025-11-27T19:15:51+01:00" level=error msg="microvm reconciliation for default/972334c2-7f9f-4241-82c6-3e9c61036ced/01KAY9QA4KW1AN7Y72JGA6YKJT failed 11 times" action=reconcile controller=microvm

What did you expect to happen:

I expect the VM to start without errors.

How to reproduce it:

Anything else you would like to add:
[Miscellaneous information that will assist in solving the issue.]

Environment:

• flintlock version:
• containerd version:
• OS (e.g. from /etc/os-release):

[richardcase]

@andreineamtu has done some great investigation on this. It turns out that in later version of Firecracker network-interfaces in the config file has become network_interfaces.

This is the firecracker change: firecracker-microvm/firecracker#5030