Can't boot over uefi pxe on new HPE ProLiant DL380 Gen10 Plus Server

[Manu3lll]

Hi together,

I'm trying to setup a diskless Rhel 8 HPE Server. The boot images are provided over pxe over uefi. All boot images are built with Ansible automation language (Redhat). 

When I'm trying to boot over pxe and select my menu entry, I'm getting the following error message (Unfortunately I don't have permissions to upload pictures):

error: ../../grub-core/loader/-386/efi/linux/.c:119:cant' allocate initrd.
Press any key to continue...

After pressing continue the boot progress continues, but after a view seconds a kernel panic appears:

2.0219551 Kernel panic- not syncing: UFS: Unable to mount root fs on unknown-Block(0,07
2.0219571 CPU: 4 PID: 1 Comm: swapper/0 Not tointed 4.10.0-740.cl0.x06 64 #1
2.021956] Harduare name: HPE ProLiant DL380 Gen10 Plus/Proliant DL360 Gen10 Plus, BIOS 016 01/13/2022
2.0375321 tsc: Refined 13C clocksource calibration: 0591.522 M lz 
2.010969] Call Trace:
2.0409731 dump_slack+0x5c/0xB0
2.0109751 panicrOxc7/0x209
2.040977] mount block root+Ox2be/0x2e2
2.0409001 ? do_early_param+0x91/0x91
2.0109611 prepare_namespace+0x135/0x16b
2.0409021 kernel_init frecable+0xtle/0x220
2.0109841 ? rest_initroxad/Oxaa
2.0409051 kernel init+Oxa/Oxf6
2.0109861 ret, fron_ fork+0xlf/0x10
2.0410651 Kernel Offset: 0x25c00000 from Oxffffff81000000 Crelocation range: Oxffff((f(B0000000-Oxffffft
2.2506721 -I end Kernel panic noz syncing: UFS: Unable to mount ront fs on unknnun-block(0,0) 

Environment:

• DHCP and TFTP server on a ubuntu server

What I have already done:

• Updated the HPE Firmware and ILO Version
• Tested the diskless initramfs image inside a VMware virtual machine -> vm booted fast and completly into the system
• Tested the diskless initramfs image on an older Intel Bare Metal Server -> server booted completly into the system
• Unfortunately when I'm trying to boot over legacy the server don't request a dhcp address.

I would be very happy if someone can help me solving these problems. Thank you for your help.

Best regards

Manuel 

[support_s]

System recommended content:

1. Advisory: (Revision) HPE ProLiant ML10 Gen9 Servers - The Operating System (OS) Will Fail to Boot And The System Will Continuously Loop in PXE Boot After the System ROM is Upgraded to Version 2016.08.03 (Dated August 5th 2016)

2. HPE ProLiant DL380 Gen10 Plus Server User Guide

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[sudhirsingh · Accepted solution]

@Manu3lll

Enable PXE boot for the desired network interface first before changing the boot mode to Legacy.

Try to reduce the size of the image, likely due to bigger size its unable load/allocate.

Refer following third party article , this might be useful

https://bugzilla.redhat.com/show_bug.cgi?id=1572126