Mellanox ethernet driver is not auto loaded

[Evgeny Kozhemyakin]

Fuel: 6.1
OS: CentOS
mlx4_core: 2.2
kernel: 2.6.32-504

On nodes with CentOS provisioned loading Mellanox core driver (mlx4_core)
does not cause loading Mellanox ethernet driver (mlx4_en).

Bootstrap and Ubuntu are OK. They supplied with another mlx4 version.

One of possible workarounds is
echo "install mlx4_core /sbin/modprobe --ignore-install mlx4_core && /sbin/modprobe mlx4_en" > /etc/modprobe.d/mlx.conf

[Evgeny Kozhemyakin (ekozhemyakin)]

Ooops. Sorry, I've fogotten to mention, the issue is not related to mellanox plugin.
It's just about CentOS supplied with MOS.

[Matthew Mosesohn (raytrac3r)]

This is possibly related to IBP and preparing the modprobe conf during provisioning

[Andrey Danin (gcon-monolake)]

Found the corresponded bug https://bugs.launchpad.net/maas/+bug/1115710

There is Mellanox plugin for 6.1 which provides an ability to just install OFED drivers but not enable Mellanox-specific functions. So, I'd recommend to use the plugin instead of manual workarounds.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/6.1
Review: https://review.openstack.org/238075

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/6.1
Review: https://review.openstack.org/238243

[Maksim Malchuk (mmalchuk)]

For QA, how-to check this fix:
1. provision nodes, and check each node.
2. deploy cluster with centos nodes, than check again on each node.
3. deploy cluster with classic (anaconda/kickstart) method, then check again on each node.

steps to check:
1. modprobe mlx4_core
2. lsmod | grep mlx

lsmod should show mlx4_en module loaded together with mlx4_core

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/7.0
Review: https://review.openstack.org/241142

[OpenStack Infra (hudson-openstack)]

Change abandoned by Maksim Malchuk (<email address hidden>) on branch: stable/6.1
Review: https://review.openstack.org/238075

[Maksim Malchuk (mmalchuk)]

Fix proposed to branch: stable/6.1
Review: https://review.openstack.org/#/c/238243/

[Sergii Golovatiuk (sgolovatiuk)]

The bug is invalid for master branch as we still have Centos 6.5 bootstrap. However I think there should be some note or update in CentOS 7 feature.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/247765

[OpenStack Infra (hudson-openstack)]

Change abandoned by Maksim Malchuk (<email address hidden>) on branch: master
Review: https://review.openstack.org/247765
Reason: https://review.openstack.org/#/c/248115/

[OpenStack Infra (hudson-openstack)]

Change abandoned by Maksim Malchuk (<email address hidden>) on branch: stable/7.0
Review: https://review.openstack.org/241142
Reason: https://review.openstack.org/#/c/248115/

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/238243
Committed: https://git.openstack.org/cgit/openstack/fuel-main/commit/?id=bc1b52fbf0703b3a84239b699378c064ae0a4d3c
Submitter: Jenkins
Branch: stable/6.1

commit bc1b52fbf0703b3a84239b699378c064ae0a4d3c
Author: Maksim Malchuk <email address hidden>
Date: Wed Oct 21 23:42:09 2015 +0300

    Mellanox ethernet driver (mlx4_en) autoloading together with core driver

    Mellanox ethernet driver (mlx4_en) should be loaded together together with
    core driver (mlx4_core).

    This fix for default CentOS provision image taken from the libmlx4 package.

    Change-Id: Ic1c26ff610fc657d05a854e81cf3681f3eeb0c45
    Closes-Bug: #1501309