Re: [ovirt-users] oVIRT 4.1 / iSCSI Multipathing
Hi,
Am 17.07.2017 um 14:11 schrieb Devin Acosta:
I am still troubleshooting the issue, I haven’t found any resolution
to
my issue at this point yet. I need to figure out by this Friday
otherwise I need to look at Xen or another solution. iSCSI and oVIRT
seems problematic.
The configuration of iSCSI-Multipathing via OVirt didn't work for me
either. IIRC the underlying problem in my case was that I use totally
isolated networks for each path.
Workaround: to make round robin work you have to enable it by editing
"/etc/multipath.conf". Just add the 3 lines for the round robin setting
(see comment in the file) and additionally add the "# VDSM PRIVATE"
comment to keep vdsmd from overwriting your settings.
My multipath.conf:
# VDSM REVISION 1.3
# VDSM PRIVATE
defaults {
polling_interval 5
no_path_retry fail
user_friendly_names no
flush_on_last_del yes
fast_io_fail_tmo 5
dev_loss_tmo 30
max_fds 4096
# 3 lines added manually for multipathing:
path_selector "round-robin 0"
path_grouping_policy multibus
failback immediate
}
# Remove devices entries when overrides section is available.
devices {
device {
# These settings overrides built-in devices settings. It does not apply
# to devices without built-in settings (these use the settings in the
# "defaults" section), or to devices defined in the "devices"
section.
# Note: This is not available yet on Fedora 21. For more info see
# https://bugzilla.redhat.com/1253799
all_devs yes
no_path_retry fail
}
}
To enable the settings:
systemctl restart multipathd
See if it works:
multipath -ll
HTH,
Uwe