Michal 7b5331ddcd fix(migration): the backup has no WAN by design; stop failing it for that ...

The cutover succeeded on vyos001 -- gateway live, bond0.53 holding
87.192.101.48 with the cloned MAC, kea serving, clients routing out through NAT.
vyos002 then ran the same script and was judged unhealthy, because the mandatory
checks are "default route exists / internet reachable / DNS resolves" and the
backup deliberately holds its WAN interfaces DOWN. Its config was correct; the
check did not apply to it. Confirmed by hand before the timer could revert a
good config.

This is the third instance of one mistake: asserting a condition that is not
true of the box being checked. First requiring every WAN when one suffices, now
requiring a WAN on the box that is configured not to have one.

A delta containing `interfaces ... disable` for the WAN now identifies the
backup, and the WAN-dependent checks are skipped with a note. kea and the DNS
forwarder remain mandatory on both -- those are what the backup must actually
be able to do.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DMVzWZgiKW2wquf5z8S1yH

2026-08-18 01:48:48 +01:00

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