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Daniel Hilst
3a5cbef630
The Ubuntu netboot image inherited the build host's /etc/hostname --
genimage's chroot shares the build host's UTS namespace, so /etc/hostname
ended up as the MN's name and every diskless node booted as that name
instead of its own ("hostname poisoning"). xCAT keys on IP/MAC so
provisioning still succeeds, but the node's local identity (hostname,
prompt, syslog) is wrong and N nodes share one name. The image also
shipped no netplan, so systemd-networkd-wait-online failed. In
compute.postinstall, clear /etc/hostname so each node takes its name at
boot from DHCP (udhcpc option host-name) / xCAT, and drop in a DHCP
netplan (optional, dhcp-identifier mac) so systemd-networkd configures the
boot NIC. Ubuntu-only.
Signed-off-by: Daniel Hilst <392820+dhilst@users.noreply.github.com>