Three Kubernetes endpoint-identity tests read the real kernel hostname
and panicked when it is an IP literal (e.g. macOS without a static
HostName, where DHCP/reverse-DNS sets the kernel hostname to an address
like 192.168.1.11).
Add a cfg(test) override seam (force_kernel_hostname_for_test, mirroring
the existing force_local_host_resolution_timeout_for_test pattern) and
route the production read through kernel_hostname_for_endpoint_identity()
so the tests inject deterministic hostnames instead of depending on the
host environment. Production behavior is unchanged.
唐小鸭
88756ea8e1