7:27 a.m.
Hi Yaniv
We attempted to share the code a few years back, but I don't think it got
accepted.
In vdsm.conf we have two bridged interfaces, each connected to a SAN uplink:
[irs]
iscsi_default_ifaces = san1,san2
And here is a diff of the file
/usr/lib/python2.7/site-packages/vdsm/storage/ vs the original for
vdsm-4.20.17-1
:
463,498c463,464
<
< # Original Code ##
<
< #iscsi.addIscsiNode(self._iface, self._target, self._cred)
< #timeout = config.getint("irs", "udev_settle_timeout")
< #udevadm.settle(timeout)
<
< ### Altered Code for EqualLogic Direct LUNs for Keele University
: G.Lloyd ###
<
< ifaceNames = config.get('irs',
'iscsi_default_ifaces').split(',')
< if not ifaceNames:
< iscsi.addIscsiNode(self._iface, self._target, self._cred)
< else:
< self.log.debug("Connecting on interfaces:
{}".format(ifaceNames))
< #for ifaceName in ifaceNames:
< success = False
< while ifaceNames:
< self.log.debug("Remaining interfaces to try:
{}".format(ifaceNames))
< ifaceName = ifaceNames.pop()
< try:
< self.log.debug("Connecting on {}".format(ifaceName))
< iscsi.addIscsiNode(iscsi.IscsiInterface(ifaceName),
self._target, self._cred)
< self.log.debug("Success connecting on
{}".format(ifaceName))
< success = True
< except:
< self.log.debug("Failure connecting on interface
{}".format(ifaceName))
< if ifaceNames:
< self.log.debug("More iscsi interfaces to try,
continuing")
< pass
< elif success:
< self.log.debug("Already succeded on an interface,
continuing")
< pass
< else:
< self.log.debug("Could not connect to iscsi target
on any interface, raising exception")
< raise
< timeout = config.getint("irs", "scsi_settle_timeout")
---
iscsi.addIscsiNode(self._iface, self._target, self._cred)
timeout = config.getint("irs", "udev_settle_timeout")
501,502d466
< ### End of Custom Alterations ###
<
Regards
*Gary Lloyd*
________________________________________________
I.T. Systems:Keele University
Finance & IT Directorate
Keele:Staffs:IC1 Building:ST5 5NB:UK
+44 1782 733063 <%2B44%201782%20733073>
________________________________________________
On 11 February 2018 at 08:38, Yaniv Kaul <ykaul(a)redhat.com> wrote:
On Fri, Feb 9, 2018 at 4:06 PM, Gary Lloyd <g.lloyd(a)keele.ac.uk> wrote:
> Hi
>
> Is it possible/supported to upgrade from Ovirt 3.6 straight to Ovirt 4.2 ?
>
No, you go through 4.0, 4.1.
> Does live migration still function between the older vdsm nodes and vdsm
> nodes with software built against Ovirt 4.2 ?
>
Yes, keep the cluster level at 3.6.
>
> We changed a couple of the vdsm python files to enable iscsi multipath on
> direct luns.
> (It's a fairly simple change to a couple of the python files).
>
Nice!
Can you please contribute those patches to oVirt?
Y.
>
> We've been running it this way since 2012 (Ovirt 3.2).
>
> Many Thanks
>
> *Gary Lloyd*
> ________________________________________________
> I.T. Systems:Keele University
> Finance & IT Directorate
> Keele:Staffs:IC1 Building:ST5 5NB:UK
> +44 1782 733063 <%2B44%201782%20733073>
> ________________________________________________
>
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>