Change in vdsm[master]: Set sysctl to allow iSCSI multipath with multiple NICs in th...

danken at redhat.com danken at redhat.com
Mon Jan 12 17:12:32 UTC 2015


Dan Kenigsberg has submitted this change and it was merged.

Change subject: Set sysctl to allow iSCSI multipath with multiple NICs in the same subnet
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Set sysctl to allow iSCSI multipath with multiple NICs in the same subnet

When two or more interfaces are in the same subnet, the default OS
behaviour won't allow the independent traffic between local NICs and
iSCSI targets.

These sysctl tweaks are needed to have iSCSI multipath working in
such topology:

  eth1 (192.168.25.200) --|
                          |-- iSCSI Target (192.168.25.10)
  eth2 (192.168.25.201) --|

For the ARP flux problem, where the machine may respond to ARP requests
from both Ethernet interfaces, we are setting "arp_ignore=1" and
"arp_announce=2"

To allow multiple iSCSI connections in a multiple NIC per subnet
configuration, reverse path filtering must be loosened with
"rp_filter=2" for the interfaces.

Change-Id: Ibf93d49317c76aece764e53e58e0ff28868f16b0
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1112861
Signed-off-by: Amador Pahim <apahim at redhat.com>
Reviewed-on: http://gerrit.ovirt.org/31529
Reviewed-by: Federico Simoncelli <fsimonce at redhat.com>
Reviewed-by: Yaniv Bronhaim <ybronhei at redhat.com>
---
M vdsm/storage/iscsi.py
M vdsm/vdsm-sysctl.conf
2 files changed, 60 insertions(+), 1 deletion(-)

Approvals:
  Yaniv Bronhaim: Looks good to me, but someone else must approve
  Federico Simoncelli: Looks good to me, approved
  Amador Pahim: Verified



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Gerrit-MessageType: merged
Gerrit-Change-Id: Ibf93d49317c76aece764e53e58e0ff28868f16b0
Gerrit-PatchSet: 28
Gerrit-Project: vdsm
Gerrit-Branch: master
Gerrit-Owner: Amador Pahim <apahim at redhat.com>
Gerrit-Reviewer: Amador Pahim <apahim at redhat.com>
Gerrit-Reviewer: Antoni Segura Puimedon <toni at midokura.com>
Gerrit-Reviewer: Dan Kenigsberg <danken at redhat.com>
Gerrit-Reviewer: Federico Simoncelli <fsimonce at redhat.com>
Gerrit-Reviewer: Nir Soffer <nsoffer at redhat.com>
Gerrit-Reviewer: Sergey Gotliv <sgotliv at redhat.com>
Gerrit-Reviewer: Yaniv Bronhaim <ybronhei at redhat.com>
Gerrit-Reviewer: Yoav Kleinberger <ykleinbe at redhat.com>
Gerrit-Reviewer: automation at ovirt.org
Gerrit-Reviewer: jian wang <wjian84 at gmail.com>
Gerrit-Reviewer: oVirt Jenkins CI Server


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