[ClusterLabs] Warning; EL6 kernel 2.6.32-754.28.1 breaks bonding!

[Hayden,Robert]

> -----Original Message-----
> From: Users <users-bounces at clusterlabs.org> On Behalf Of Digimer
> Sent: Monday, April 27, 2020 5:12 PM
> To: Cluster Labs - Users <users at clusterlabs.org>
> Subject: [ClusterLabs] Warning; EL6 kernel 2.6.32-754.28.1 breaks bonding!
>
> I've confirmed that active-passive bonding is very broken on the latest
> EL6 kernel, 2.6.32-754.28.1. It works fine on 2.6.32-754.27.1 though.
>
> I've opened up an RHBZ (#1828604), but it's auto-set to private. Copy of
> the bug is in CentOS #17292
> (https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbug
> s.centos.org%2Fview.php%3Fid%3D17292&data=02%7C01%7Crhayden
> %40cerner.com%7C7e1191ac963a4ac80cea08d7eaf81a8b%7Cfbc493a80d2444
> 54a815f4ca58e8c09d%7C0%7C0%7C637236223640212327&sdata=hVfkw
> 7ovswop3QLqcoindEL8BB3zJF%2FEHlHWlWe8WbE%3D&reserved=0)
>
> In short, if you use bonding and have EL6 nodes, do not upgrade to .28,
> and if you are already on .28, downgrade to .27.

Following up.   For all of us with clusters still using Linux 6.10 with active/backup bonding, the wait is over with the release of .30.2 kernel.

For Red Hat Enterprise Linux systems, see RHSA-2020:2430
For Oracle Linux systems, see ELSA-2020-2430

We have tested this on HPE hardware with network switch port disablement.  Looks like the correction works.

Robert

>
> Howto:
>
> # yum install kernel-2.6.32-754.27.1.el6.x86_64
> kernel-devel-2.6.32-754.27.1.el6.x86_64
> kernel-headers-2.6.32-754.27.1.el6.x86_64
>
> Edit '/boot/grub/grub.conf' (or '/boot/efi/EFI/redhat/grub.conf') and
> change 'default=X' to the .27.1 kernel entry, reboot. After reboot,
> remove .28.1;
>
> --
> Digimer
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