When MAIN's broadcast port changes and the API has no port of its own,
ClusterEndpoint::recordChange() runs before the ports are applied: it
bumps cluster_policy_ver (agents refetch the policy within a heartbeat)
and keeps the old port for 7 days (migration 038). The policy lists it
after the new URLs; MAIN's nginx gets bin/nginx/conf/cluster_legacy.conf
from the set_port handler, one server block per kept port serving
/cluster/v1/ and 404 for everything else (included by glob). cron:cluster
drops expired ports, bumps the policy and re-applies MAIN's ports.
nginx -t passes with and without the file; a run confirmed only
/cluster/v1/ reaches PHP on the old port.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DcNdxHieZuUh3EnMUKt7zf
