[Bug 1785859] Re: [REGRESSION] ppc64el grub in bionic may be auto-generating MAC address instead of using the assigned to the VM.
Julian Andres Klode
1785859 at bugs.launchpad.net
Thu Aug 23 11:17:51 UTC 2018
This is the culprit:
https://git.savannah.gnu.org/cgit/grub.git/commit/grub-
core/net?id=9585647a25b65f98db6bd22c569b34795512f046
Removing the parser for bootpath gets rid of the broken additional
interface. I expect that checking the return value of
grub_ieee1275_get_property() when querying the mac also fixes it, and
will investigate that shortly (as it seems the bootpath contains IP
addresses, but not MAC addresses).
** Changed in: grub2 (Ubuntu)
Status: Triaged => In Progress
** Changed in: grub2 (Ubuntu)
Assignee: (unassigned) => Julian Andres Klode (juliank)
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https://bugs.launchpad.net/bugs/1785859
Title:
[REGRESSION] ppc64el grub in bionic may be auto-generating MAC address
instead of using the assigned to the VM.
Status in maas-images:
Fix Released
Status in grub2 package in Ubuntu:
In Progress
Bug description:
In MAAS, we use grub-mkimage to create a bootloader for VM's to PXE
boot of MAAS by a grub bootloader that we provide over the network.
(we call this bootppc64.bin).
This bootloader is created with the following grub configuration:
grub_config: |
# MAAS GRUB2 pre-loader configuration file
# Load based on MAC address first.
configfile (pxe)/grub/grub.cfg-${net_default_mac}
# Failed to load based on MAC address.
# Load arm64 by default, UEFI only supported by 64-bit
configfile (pxe)/grub/grub.cfg-default-arm64
When we use bionic bootloader, we see the following output in the
console:
"Booting under MAAS direction... [ grub.cfg-default-ppc 642B 100%
57.16B/s ]"
And in rackd.log we see:
2018-08-07 17:37:21 provisioningserver.rackdservices.tftp: [info] bootppc64.bin requested by 10.245.136.136
2018-08-07 17:37:24 provisioningserver.rackdservices.tftp: [info] /grub/grub.cfg-80:1c:b0:c0:7d:c5 requested by 10.245.136.136
2018-08-07 17:37:24 provisioningserver.rackdservices.tftp: [info] /grub/grub.cfg-default-ppc64el requested by 10.245.136.136
2018-08-07 17:37:24 provisioningserver.rackdservices.tftp: [info] ubuntu/ppc64el/ga-18.04/bionic/daily/boot-kernel requested by 10.245.136.136
This means that the VM attempted to PXE boot with MAC address
"80:1c:b0:c0:7d:c5", but the VM itself has a different MAC address
"52:54:00:7f:83:62"
<interface type='network'>
<mac address='52:54:00:7f:83:62'/>
<source network='maas'/>
<model type='virtio'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
</interface>
If we are to switch the bootloader to the one created with xenial as a base, we see correct behavior.
"Booting under MAAS direction... [ grub.cfg-52:54:00:7f 640B 100%
0.62B/s ] "
And the result is that grub has used to correct MAC address for the
PXE process.
2018-08-07 17:07:45 provisioningserver.rackdservices.tftp: [info] bootppc64.bin requested by 10.245.136.136
2018-08-07 17:07:46 provisioningserver.rackdservices.tftp: [info] /grub/grub.cfg-52:54:00:7f:83:62 requested by 10.245.136.136
2018-08-07 17:07:47 provisioningserver.rackdservices.tftp: [info] ubuntu/ppc64el/generic/bionic/daily/boot-kernel requested by 10.245.136.136
2018-08-07 17:08:17 provisioningserver.rackdservices.tftp: [info] ubuntu/ppc64el/generic/bionic/daily/boot-initrd requested by 10.245.136.136
It would seem as the firmware in bionic is automatically generating a new MAC address.
Bionic console log
-------------------------------------------------------------------------------
Using default console: /vdevice/vty at 30000000
Welcome to Open Firmware
Copyright (c) 2004, 2017 IBM Corporation All rights reserved.
This program and the accompanying materials are made available
under the terms of the BSD License available at
http://www.opensource.org/licenses/bsd-license.php
Trying to load: from: /pci at 800000020000000/ethernet at 4 ...
Initializing NIC
Reading MAC address from device: 52:54:00:7f:83:62
Requesting information via DHCP: done
Using IPv4 address: 10.245.136.136
Requesting file "bootppc64.bin" via TFTP from 10.245.136.6
Receiving data: 1665 KBytes
TFTP: Received bootppc64.bin (1665 KBytes)
Successfully loaded
Booting under MAAS direction... [ grub.cfg-default-ppc 642B 100% 57.16B/s ]
OF stdout device is: /vdevice/vty at 30000000initrd 55.89MiB 100% 647.54KiB/s ]
Preparing to boot Linux version 4.15.0-30-generic (buildd at bos02-ppc64el-011) (gcc version 7.3.0 (Ubuntu 7
.3.0-16ubuntu3)) #32-Ubuntu SMP Thu Jul 26 17:43:11 UTC 2018 (Ubuntu 4.15.0-30.32-generic 4.15.18)
Detected machine type: 0000000000000101
command line: BOOT_IMAGE=ubuntu/ppc64el/ga-18.04/bionic/daily/boot-kernel nomodeset ro root=squash:http:/
/10.245.136.6:5248/images/ubuntu/ppc64el/ga-18.04/bionic/daily/squashfs ip=::::maas-enlist:BOOTIF ip6=off
overlayroot=tmpfs overlayroot_cfgdisk=disabled cc:{datasource_list: [MAAS]}end_cc cloud-config-url=http:
//10-245-136-0--21.maas-internal:5248/MAAS/metadata/latest/enlist-preseed/?op=get_enlist_preseed apparmor
=0 log_host=10.245.136.6 log_port=514 BOOTIF=01-80:1c:b0:c0:7d:c5
Xenial console log
--------------------------------------------------------------------
Using default console: /vdevice/vty at 30000000 [1032/2975]
Welcome to Open Firmware
Copyright (c) 2004, 2017 IBM Corporation All rights reserved.
This program and the accompanying materials are made available
under the terms of the BSD License available at
http://www.opensource.org/licenses/bsd-license.php
Trying to load: from: /pci at 800000020000000/ethernet at 4 ...
Initializing NIC
Reading MAC address from device: 52:54:00:7f:83:62
Requesting information via DHCP: done
Using IPv4 address: 10.245.136.136
Requesting file "bootppc64.bin" via TFTP from 10.245.136.6
Receiving data: 1714 KBytes
TFTP: Received bootppc64.bin (1714 KBytes)
Successfully loaded
Booting under MAAS direction... [ grub.cfg-52:54:00:7f 640B 100% 0.62B/s ]
OF stdout device is: /vdevice/vty at 30000000initrd 55.89MiB 100% 958.95KiB/s ]
Preparing to boot Linux version 4.15.0-30-generic (buildd at bos02-ppc64el-011) (gcc version 7.3.0 (Ubuntu $
.3.0-16ubuntu3)) #32-Ubuntu SMP Thu Jul 26 17:43:11 UTC 2018 (Ubuntu 4.15.0-30.32-generic 4.15.18)
Detected machine type: 0000000000000101
command line: BOOT_IMAGE=ubuntu/ppc64el/generic/bionic/daily/boot-kernel nomodeset ro root=squash:http:/$
10.245.136.6:5248/images/ubuntu/ppc64el/generic/bionic/daily/squashfs ip=::::fast-cow:BOOTIF ip6=off ove$
layroot=tmpfs overlayroot_cfgdisk=disabled cc:{datasource_list: [MAAS]}end_cc cloud-config-url=http://10$
245-136-0--21.maas-internal:5248/MAAS/metadata/latest/by-id/4ysp63/?op=get_preseed apparmor=0 log_host=1$
.245.136.6 log_port=514 rootdelay=60 BOOTIF=01-52:54:00:7f:83:62
Max number of cores passed to firmware: 2048 (NR_CPUS = 2048)
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