--_000_03468DF4AA234FCC80074739E2D985D1ifufrjbr_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable 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@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 _______________________________________________ Users mailing list Users@ovirt.org<mailto:Users@ovirt.org> <mailto:Users@ovirt.org> http://lists.ovirt.org/mailman/listinfo/users <http://lists.ovirt.org/mailman/listinfo/users> _______________________________________________ Users mailing list Users@ovirt.org<mailto:Users@ovirt.org> http://lists.ovirt.org/mailman/listinfo/users _______________________________________________ Users mailing list Users@ovirt.org<mailto:Users@ovirt.org> http://lists.ovirt.org/mailman/listinfo/users --_000_03468DF4AA234FCC80074739E2D985D1ifufrjbr_ Content-Type: text/html; charset="iso-8859-1" Content-ID: <8742F9D5CFE6964EB85063889CAE8F1B@if.ufrj.br> Content-Transfer-Encoding: quoted-printable <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@virtx.net</a>> 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@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</a></div> <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:vdsm&= #43;branch:master+topic:ipv6-iscsi-target-support" class=3D""> https://gerrit.ovirt.org/#/q/status:merged+project:vdsm+branch:mast= 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= =3D""> Users mailing list<br class=3D""> <a href=3D"mailto:Users@ovirt.org" class=3D"">Users@ovirt= .org</a> <<a href=3D"mailto:Users@ovirt.org" class=3D"">mailto:Users@ovi= rt.org</a>><br class=3D""> <a href=3D"http://lists.ovirt.org/mailman/listinfo/users"= class=3D"">http://lists.ovirt.org/mailman/listinfo/users</a><br class=3D""=
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