6:30 p.m.
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On 30 Sep 2017, at 20:18, Ben Bradley <listsbb@virtx.net<mailto:listsbb@vir=
tx.net>> wrote:
On 28/09/17 22:27, Ben Bradley wrote:
On 28/09/17 08:32, Yaniv Kaul wrote:
On Wed, Sep 27, 2017 at 10:59 PM, Ben Bradley <listsbb@virtx.net<mailto:lis=
tsbb(a)virtx.net> <mailto:listsbb@virtx.net>> wrote:
Hi All
I'm looking to add a new host to my oVirt lab installation.
I'm going to share out some LVs from a separate box over iSCSI and
will hook the new host up to that.
I have 2 NICs on the storage host and 2 NICs on the new Ovirt host
to dedicate to the iSCSI traffic.
I also have 2 separate switches so I'm looking for redundancy here.
Both iSCSI host and oVirt host plugged into both switches.
If this was non-iSCSI traffic and without oVirt I would create
bonded interfaces in active-backup mode and layer the VLANs on top
of that.
But for iSCSI traffic without oVirt involved I wouldn't bother with
a bond and just use multipath.
From scanning the oVirt docs it looks like there is an option to
have oVirt configure iSCSI multipathing.
Look for iSCSI bonding - that's the feature you are looking for.
Thanks for the replies.
By iSCSI bonding, do you mean the oVirt feature "iSCSI multipathing" as men=
tioned here https://www.ovirt.org/documentation/admin-guide/chap-Storage/ ?
Separate links seems to be the consensus then. Since these are links dedica=
ted to iSCSI traffic, not shared. the ovirtmgmt bridge lives on top of an a=
ctive-backup bond on other NICs.
Thanks, Ben
And an extra question about oVirt's iSCSI multipathing - should each path b=
e a separate VLAN+subnet?
I assume it should be separate VLANs for running separate physical fabrics =
if desired.
Thanks, Ben
Take a look at this Ben:
https://bugzilla.redhat.com/show_bug.cgi?id=3D1474904
oVirt is a little bit different with iSCSI MPIO.
So what's the best/most-supported option for oVirt?
Manually create active-backup bonds so oVirt just sees a single
storage link between host and storage?
Or leave them as separate interfaces on each side and use oVirt's
multipath/bonding?
Also I quite like the idea of using IPv6 for the iSCSI VLAN, purely
down to the fact I could use link-local addressing and not have to
worry about setting up static IPv4 addresses or DHCP. Is IPv6 iSCSI
supported by oVirt?
No, we do not. There has been some work in the area[1], but I'm not sure it=
is complete.
Y.
[1] https://gerrit.ovirt.org/#/q/status:merged+project:vdsm+branch:master+t=
opic:ipv6-iscsi-target-support
Thanks, Ben
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<html <head <meta http-equiv=3D"Content-Type"
content=3D"text/html; charset=3Diso-8859-=
1" </head <body
style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; line-break:=
after-white-space;" class=3D"" <br
class=3D"" <div><br
class=3D"" <blockquote
type=3D"cite" class=3D"" <div
class=3D"">On 30 Sep 2017, at 20:18, Ben Bradley <<a
href=3D"mailto=
:listsbb@virtx.net" class=3D"">listsbb(a)virtx.net</a>&gt;
wrote:</div <br
class=3D"Apple-interchange-newline" <div
class=3D""><span style=3D"font-family: Helvetica; font-size: 12px;
fon=
t-style: normal; font-variant-caps: normal; font-weight: normal; letter-spa=
cing: normal; text-align: start; text-indent: 0px; text-transform: none; wh=
ite-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; float=
: none; display: inline !important;" class=3D"">On
28/09/17 22:27, Ben Bradley wrote:</span><br style=3D"font-family:
Helveti=
ca; font-size: 12px; font-style: normal; font-variant-caps: normal; font-we=
ight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-=
stroke-width: 0px;" class=3D""
<blockquote type=3D"cite" style=3D"font-family: Helvetica;
font-size: 12px;=
font-style: normal; font-variant-caps: normal; font-weight: normal; letter=
-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-=
transform: none; white-space: normal; widows: auto; word-spacing: 0px; -web=
kit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;" class=3D"" On 28/09/17 08:32, Yaniv Kaul wrote:<br
class=3D"" <blockquote
type=3D"cite" class=3D""><br class=3D"" <br class=3D"" On Wed,
Sep 27, 2017 at 10:59 PM, Ben Bradley <<a href=3D"mailto:listsbb=
@virtx.net" class=3D"">listsbb(a)virtx.net</a> <<a
href=3D"mailto:listsbb@=
virtx.net" class=3D"">mailto:listsbb@virtx.net</a>>>
wrote:<br class=
=3D"" <br class=3D"" Hi All<br
class=3D"" <br class=3D"" I'm looking to add a new host
to my oVirt lab installatio=
n.<br class=3D""
I'm going to share out some LVs from a separate
box over =
iSCSI and<br class=3D""
will hook the new host up to that.<br
class=3D"" I have
2 NICs on the storage host and 2 NICs on the new O=
virt host<br class=3D""
to dedicate to the iSCSI traffic.<br
class=3D"" I also
have 2 separate switches so I'm looking for redund=
ancy here.<br class=3D""
Both iSCSI host and oVirt host plugged into both
switches=
.<br class=3D"" <br class=3D"" If this was non-iSCSI traffic and
without oVirt I would c=
reate<br class=3D"" bonded
interfaces in active-backup mode and layer the VLA=
Ns on top<br class=3D""
of that.<br class=3D"" <br class=3D""
But for iSCSI traffic without oVirt involved I
wouldn't b=
other with<br class=3D""
a bond and just use multipath.<br
class=3D"" <br class=3D"" From scanning the oVirt
docs it looks like there is=
an option to<br class=3D""
have oVirt configure iSCSI multipathing.<br
class=3D"" <br class=3D"" <br class=3D"" Look for
iSCSI bonding - that's the feature you are looking for.<br class=
=3D"" </blockquote Thanks for the replies.<br class=3D"" By iSCSI bonding, do you mean the oVirt feature "iSCSI
multipathing&qu=
ot; as mentioned here
<a href=3D"https://www.ovirt.org/documentation/admin-guide/chap-Storage... c=
lass=3D""
https://www.ovirt.org/documentation/admin-guide/chap-Storage/</a> ?<br
clas=
s=3D"" Separate links seems to be the
consensus then. Since these are links dedica=
ted to iSCSI traffic, not shared. the ovirtmgmt bridge lives on top of an a=
ctive-backup bond on other NICs.<br class=3D"" Thanks,
Ben<br class=3D"" </blockquote <br style=3D"font-family: Helvetica; font-size: 12px;
font-style: normal; f=
ont-variant-caps: normal; font-weight: normal; letter-spacing: normal; text=
-align: start; text-indent: 0px; text-transform: none; white-space: normal;=
word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=3D"" <span style=3D"font-family: Helvetica; font-size: 12px;
font-style: normal;=
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; te=
xt-align: start; text-indent: 0px; text-transform: none; white-space: norma=
l; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display:=
inline !important;" class=3D"">And
an extra question about oVirt's iSCSI multipathing - should each path be a=
separate VLAN+subnet?</span><br style=3D"font-family: Helvetica;
font-=
size: 12px; font-style: normal; font-variant-caps: normal; font-weight: nor=
mal; letter-spacing: normal; text-align: start; text-indent: 0px; text-tran=
sform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-wi=
dth: 0px;" class=3D"" <span
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal;=
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; te=
xt-align: start; text-indent: 0px; text-transform: none; white-space: norma=
l; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display:=
inline !important;" class=3D"">I
assume it should be separate VLANs for running separate physical fabrics i=
f desired.</span><br style=3D"font-family: Helvetica; font-size: 12px;
font=
-style: normal; font-variant-caps: normal; font-weight: normal; letter-spac=
ing: normal; text-align: start; text-indent: 0px; text-transform: none; whi=
te-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=
=3D"" <br style=3D"font-family:
Helvetica; font-size: 12px; font-style: normal; f=
ont-variant-caps: normal; font-weight: normal; letter-spacing: normal; text=
-align: start; text-indent: 0px; text-transform: none; white-space: normal;=
word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=3D"" <span style=3D"font-family: Helvetica; font-size: 12px;
font-style: normal;=
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; te=
xt-align: start; text-indent: 0px; text-transform: none; white-space: norma=
l; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display:=
inline !important;" class=3D"">Thanks,
Ben</span><br style=3D"font-family: Helvetica; font-size: 12px;
font-style=
: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: n=
ormal; text-align: start; text-indent: 0px; text-transform: none; white-spa=
ce: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;"
class=3D"" </div </blockquote
<div><br class=3D""
</div <div>Take a look at this
Ben:</div <div><a
href=3D"https://bugzilla.redhat.com/show_bug.cgi?id=3D1474904" clas=
s=3D"">https://bugzilla.redhat.com/show_bug.cgi?id=3D1474904... <div><br class=3D"" </div
<div>oVirt is a little bit different with iSCSI MPIO.</div <br class=3D""
<blockquote type=3D"cite" class=3D"" <div class=3D""
<blockquote type=3D"cite" style=3D"font-family: Helvetica;
font-size: 12px;=
font-style: normal; font-variant-caps: normal; font-weight: normal; letter=
-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-=
transform: none; white-space: normal; widows: auto; word-spacing: 0px; -web=
kit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;" class=3D"" <blockquote type=3D"cite"
class=3D""> So what's the best/m=
ost-supported option for oVirt?<br class=3D""
Manually create active-backup bonds so oVirt just sees
a =
single<br class=3D""
storage link between host and storage?<br
class=3D"" Or
leave them as separate interfaces on each side and use=
oVirt's<br class=3D""
multipath/bonding?<br class=3D"" <br class=3D""
Also I quite like the idea of using IPv6 for the iSCSI
VL=
AN, purely<br class=3D""
down to the fact I could use link-local addressing and
no=
t have to<br class=3D""
worry about setting up static IPv4 addresses or DHCP.
Is =
IPv6 iSCSI<br class=3D""
supported by oVirt?<br class=3D"" <br class=3D"" <br
class=3D"" No, we do not. There has been some
work in the area[1], but I'm not sure it=
is complete.<br class=3D"" Y.<br
class=3D"" <br class=3D"" [1] <a
href=3D"https://gerrit.ovirt.org/#/q/status:merged+project:v...
#43;branch:master+topic:ipv6-iscsi-target-support" class=3D""
https://gerrit.ovirt.org/#/q/status:merged+project:vdsm+b...
er+topic:ipv6-iscsi-target-support</a><span
class=3D"Apple-converted-sp=
ace"> </span><br class=3D"" <br class=3D"" <br
class=3D""
Thanks, Ben<br class=3D""
_______________________________________________<br
class=
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mailing list<br class=3D""
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class=3D"">Users@ovirt=
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rt.org</a>><br class=3D""
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class=3D"">http://lists.ovirt.org/mailman/listinfo/users<...
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ers"
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cl=
ass=3D"" <br class=3D"" <br class=3D""
</blockquote
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