First of all, is your PPC CLIENT big or little endian? I see it is
trying to load little endian which is I believe less common to have.

Anyway, let's rule out Foreman completely, can you setup DHCP and TFTP
using our official documentation? Including generating tftpboot
directory structure via grub2-mknetdir, make sure to use the target
platform with correct endian, then scp the files onto TFTP server,
setup DHCP and try then:

https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Installation_Guide/chap-installation-server-setup.html#sect-network-boot-setup-ppc-grub2

The  filename should be set correctly to
"boot/grub2/powerpc-ieee1275/core.elf" now. Does it load from correct
paths now?

I have built the core.elf from RHEL 7.4, can you try that as well?
http://people.redhat.com/~lzapleta/test/grub2-ppc-test.tar.xz

Let's find out that first.




On Fri, Sep 1, 2017 at 10:51 AM, Daniele Gregori (E4)
<[email protected]> wrote:
> Hi Lukas,
>    The system composed by Foreman (tftp) server and Power PC client is centos 
> 7.
> I take the Foreman bootloader and move the grubppc64le.efi to the 
> /var/lib/tftpboot/grub2 directory with the same result, from 
> /var/log/messages:
>
> Sep  1 09:26:54 srv-install dhcpd: DHCPDISCOVER from 70:e2:84:14:1c:13 via 
> eno16780032
> Sep  1 09:26:54 srv-install dhcpd: DHCPOFFER on 172.16.2.207 to 
> 70:e2:84:14:1c:13 via eno16780032
> Sep  1 09:26:54 srv-install dhcpd: Dynamic and static leases present for 
> 172.16.2.207.
> Sep  1 09:26:54 srv-install dhcpd: Remove host declaration davide13.e4srv or 
> remove 172.16.2.207
> Sep  1 09:26:54 srv-install dhcpd: from the dynamic address pool for 
> 172.16.2.0/24
> Sep  1 09:26:54 srv-install dhcpd: DHCPREQUEST for 172.16.2.207 (172.16.2.2) 
> from 70:e2:84:14:1c:13 via eno16780032
> Sep  1 09:26:54 srv-install dhcpd: DHCPACK on 172.16.2.207 to 
> 70:e2:84:14:1c:13 via eno16780032
> Sep  1 09:26:54 srv-install in.tftpd[18238]: RRQ from 172.16.2.207 filename 
> /grub2/pxelinux.cfg/01-70-e2-84-14-1c-13
> Sep  1 09:26:54 srv-install in.tftpd[18238]: sending NAK (1, File not found) 
> to 172.16.2.207
> Sep  1 09:26:54 srv-install in.tftpd[18239]: RRQ from 172.16.2.207 filename 
> /grub2/pxelinux.cfg/AC1002CF
> Sep  1 09:26:54 srv-install in.tftpd[18239]: sending NAK (1, File not found) 
> to 172.16.2.207
> Sep  1 09:26:54 srv-install in.tftpd[18240]: RRQ from 172.16.2.207 filename 
> /grub2/pxelinux.cfg/AC1002C
> Sep  1 09:26:54 srv-install in.tftpd[18240]: sending NAK (1, File not found) 
> to 172.16.2.207
> Sep  1 09:26:54 srv-install in.tftpd[18241]: RRQ from 172.16.2.207 filename 
> /grub2/pxelinux.cfg/AC1002
> Sep  1 09:26:54 srv-install in.tftpd[18241]: sending NAK (1, File not found) 
> to 172.16.2.207
> Sep  1 09:26:54 srv-install in.tftpd[18242]: RRQ from 172.16.2.207 filename 
> /grub2/pxelinux.cfg/AC100
> Sep  1 09:26:54 srv-install in.tftpd[18242]: sending NAK (1, File not found) 
> to 172.16.2.207
> Sep  1 09:26:54 srv-install in.tftpd[18243]: RRQ from 172.16.2.207 filename 
> /grub2/pxelinux.cfg/AC10
> Sep  1 09:26:54 srv-install in.tftpd[18243]: sending NAK (1, File not found) 
> to 172.16.2.207
> Sep  1 09:26:54 srv-install in.tftpd[18244]: RRQ from 172.16.2.207 filename 
> /grub2/pxelinux.cfg/AC1
> Sep  1 09:26:54 srv-install in.tftpd[18244]: sending NAK (1, File not found) 
> to 172.16.2.207
> Sep  1 09:26:54 srv-install in.tftpd[18245]: RRQ from 172.16.2.207 filename 
> /grub2/pxelinux.cfg/AC
> Sep  1 09:26:54 srv-install in.tftpd[18245]: sending NAK (1, File not found) 
> to 172.16.2.207
> Sep  1 09:26:54 srv-install in.tftpd[18246]: RRQ from 172.16.2.207 filename 
> /grub2/pxelinux.cfg/A
> Sep  1 09:26:54 srv-install in.tftpd[18246]: sending NAK (1, File not found) 
> to 172.16.2.207
> Sep  1 09:26:54 srv-install in.tftpd[18247]: RRQ from 172.16.2.207 filename 
> /grub2/pxelinux.cfg/default
> Sep  1 09:26:54 srv-install in.tftpd[18247]: sending NAK (1, File not found) 
> to 172.16.2.207
>
> I don’t understand who set the file: /grub2/pxelinux.cfg/01-70-e2-84-14-1c-13.
> I tried also to do:
>
> cp grub.cfg-01-54-ab-3a-71-3f-d6 pxelinux.cfg/AC1002CF
>
> then the messages wrote:
>
> Sep  1 10:43:05 srv-install dhcpd: DHCPRELEASE of 172.16.2.207 from 
> 70:e2:84:14:1c:13 via eno16780032 (not found)
> Sep  1 10:43:06 srv-install dhcpd: DHCPDISCOVER from 70:e2:84:14:1c:13 via 
> eno16780032
> Sep  1 10:43:06 srv-install dhcpd: DHCPOFFER on 172.16.2.207 to 
> 70:e2:84:14:1c:13 via eno16780032
> Sep  1 10:43:06 srv-install dhcpd: Dynamic and static leases present for 
> 172.16.2.207.
> Sep  1 10:43:06 srv-install dhcpd: Remove host declaration davide13.e4srv or 
> remove 172.16.2.207
> Sep  1 10:43:06 srv-install dhcpd: from the dynamic address pool for 
> 172.16.2.0/24
> Sep  1 10:43:06 srv-install dhcpd: DHCPREQUEST for 172.16.2.207 (172.16.2.2) 
> from 70:e2:84:14:1c:13 via eno16780032
> Sep  1 10:43:06 srv-install dhcpd: DHCPACK on 172.16.2.207 to 
> 70:e2:84:14:1c:13 via eno16780032
> Sep  1 10:43:06 srv-install in.tftpd[17038]: RRQ from 172.16.2.207 filename 
> /grub2/pxelinux.cfg/01-70-e2-84-14-1c-13
> Sep  1 10:43:27 srv-install dhcpd: DHCPDISCOVER from a4:bf:01:05:fe:87 
> (DCMIA4BF0105FE85) via 172.17.0.1
> Sep  1 10:43:30 srv-install in.tftpd[17050]: RRQ from 172.16.2.207 filename 
> /grub2/grubppc64le.efi
> Sep  1 10:43:30 srv-install dhcpd: none: host unknown.
> Sep  1 10:44:32 srv-install dhcpd: none: host unknown.
> Sep  1 10:44:38 srv-install dhcpd: DHCPRELEASE of 172.16.2.207 from 
> 70:e2:84:14:1c:13 via eno16780032 (not found)
>
> Without more info.
>
> From the client side I receive the messages:
>
> booting netboot enP5p7s0f0 (grub2/grubppc64le.efi).
> Error: kexec load failed
>
> There is something that escapes me.
> Can I improve the debug with more informations?
> Hints?
>
> Thanks
>
> Daniele
>
>
>
>
> On 01/09/2017, 09:00, "[email protected] on behalf of Lukas 
> Zapletal" <[email protected] on behalf of [email protected]> wrote:
>
>     Is this non-Red Hat OS? I mean the system that serves the DHCP/TFTP?
>
>     > [root@srv-install grub2]# ln -s /var/lib/tftpboot/core.elf   
> grubppc64le.efi
>
>     TFTP runs in chroot, never do absolute symlinks, only relative. Not
>     sure if this is same for non-RH OS tho.
>
>     > Aug 31 17:47:54 srv-install in.tftpd[3851]: RRQ from 172.16.2.207 
> filename /grub2/pxelinux.cfg/01-70-e2-84-14-1c-13
>
>     This is weird, the path should be /grub2.
>
>     Where this core.elf comes from? Can you try grubppc64le.efi from
>     foreman-bootloaders package? We don't yet have debian packages, you
>     can just unpack upstream tarball here:
>
>     http://downloads.theforeman.org/foreman-bootloaders/
>
>     If that fails, try to build core.elf. yourself with grub2-mkimage:
>
>     https://www.theforeman.org/2016/09/new-post.html
>
>     LZ
>
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-- 
Later,
  Lukas @lzap Zapletal

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