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Daniel Hilst
279207cf0a
A compute node that boots the legacy Genesis image on el10 x86_64 never acquires an address. Its serial console reports "/usr/bin/doxcat: line 293: dhclient: command not found" and then "It seems to be taking a while to acquire an IPv4 address". The DHCP server side is sound: Kea leases the address and the node never asks for it. AlmaLinux 10 and EPEL 10 package no ISC dhcp-client. dracut_install reports a missing binary and returns, so module-setup.sh named dhclient, the build kept going and the image shipped without a client. doxcat then named dhclient at six call sites with no alternative. doxcat now chooses its client at run time. genesis_dhcp_command() returns the command line for one interface and one address family, and genesis_start_dhcp() runs it and reports when the image carries none. The ISC client keeps its command line where a release packages it, so el8 and el9 are unchanged. Where it is absent, dhcpcd stands in: AlmaLinux 10 baseos packages it at 236 KB, and it carries its own resolv.conf, hostname and ntp hooks, so it needs no dhclient-script. dhcpcd on a single interface exits when its 30 second timeout expires and de-configures the interface as it goes, so it is asked for -t 0 and -p. The dracut module installs whichever client the build root carries, together with the hooks dhcpcd runs on every lease. The spec build-requires dhcpcd from rhel 10 on, and verify-genesis-payload now requires usr/sbin/dhcpcd there, so an image that ships with no client fails the build instead of reaching a node. genesis_dhcp_client.t drives both routines with the clients shadowed by recording stubs. It fails on the parent commit, and deleting the dhcpcd branch turns five of its assertions red. Signed-off-by: Daniel Hilst <392820+dhilst@users.noreply.github.com> (cherry picked from commit b9329998c80383bb0397d16a558f66a6bb9db399)