I may have found a workaround/fix for this. I noticed that
/etc/grub.d/30-os_prober has a GRUB_DISABLE_OS_PROBER variable that will
skip probing for other OSes on the machine, so I added
GRUB_DISABLE_OS_PROBER=true to the kernel options and the installer
proceeded to completion on a machine that was consistently hanging at
66%/osprober. I'm using foreman for the provisioning so my pxegrub2
template looks like this now:
menuentry '<%= template_name %>_uefi' {
linuxefi <%= @kernel %> auto=true netcfg/choose_interface=<%=
@host.primary_interface.identifier %>np0 url=<%= foreman_url('provision')%>
ramdisk_size=10800 root=/dev/rd/0 rw auto hostname=<%= @host.name %>
GRUB_DISABLE_OS_PROBER=true <%= options %>
initrdefi <%= @initrd %>
}
As soon as I added this option, the install completed. Have only tested
it on this single box, will update again if this doesn't fix it on
future machines.
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https://bugs.launchpad.net/bugs/1854839
Title:
Fresh Bionic install hangs forever at 66% waiting for os-prober
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