This is a multi-part message in MIME format. ------------1605a0da24624bb2768b1bd18 Content-Type: text/plain; format=flowed; charset="UTF-8" Content-Transfer-Encoding: quoted-printable No it is not safe to only use two nodes as you can end up with split brai= n. So two nodes and an arbiter node is needed. The arbiter doesn't need to = be=20 that fancy. Also the installer if installed with gluster as hosted storage (storage f= or=20 the engine) will complain if replica is less than 3. /Johan On December 15, 2017 12:54:14 PM Jarek <jaru@jaru.eu.org> wrote:
Yes, I checked it but it seems I still need three nodes - 2 for storage= and=20 one smaller for arbiter. Is it safe to deploy it only on two nodes? Am I wrong?
From: "Sandro Bonazzola" <sbonazzo@redhat.com> To: "Jaroslaw Augustynowicz" <jaru@jaru.eu.org> Cc: "users" <users@ovirt.org> Sent: Friday, December 15, 2017 12:03:24 PM Subject: Re: [ovirt-users] Two node configuration.
2017-12-15 8:55 GMT+01:00 Jarek < [ mailto:jaru@jaru.eu.org |=20 jaru@jaru.eu.org ] > :
Hello, currently I'm using kvms with pcs&drbd on vms... is there any ov= irt=20 solution for ha with two nodes (storage on local disks) without pcs& dr= bd=20 for storage? I know about gluster storage but it needs third host;/
Did you check [=20 https://access.redhat.com/documentation/en-us/red_hat_gluster_storage/3= .3/html/administration_guide/creating_arbitrated_replicated_volumes=20 |=20 https://access.redhat.com/documentation/en-us/red_hat_gluster_storage/3= .3/html/administration_guide/creating_arbitrated_replicated_volumes=20 ] ?
BQ_BEGIN
_______________________________________________ Users mailing list [ mailto:Users@ovirt.org | Users@ovirt.org ] [ http://lists.ovirt.org/mailman/listinfo/users |=20 http://lists.ovirt.org/mailman/listinfo/users ]
BQ_END
--
SANDRO BONAZZOLA
ASSOCIATE MANAGER, SOFTWARE ENGINEERING, EMEA ENG VIRTUALIZATION R&D
[ https://www.redhat.com/ | Red Hat=C2=A0EMEA ] [ https://red.ht/sig ] =09 [ https://redhat.com/trusted | TRIED. TESTED. TRUSTED. ]
---------- _______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Sent: </b>Friday, December 15, 2017 12:03:24 PM<br><b>Subject: </b>Re: [ov= irt-users] Two node configuration.<br></div><br><div data-marker=3D"__QUOTE= D_TEXT__"><div dir=3D"ltr"><br><div class=3D"gmail_extra"><br><div class=3D= "gmail_quote">2017-12-15 8:55 GMT+01:00 Jarek <span dir=3D"ltr"><<a href= =3D"mailto:jaru@jaru.eu.org" target=3D"_blank">jaru@jaru.eu.org</a>></sp= an>:<br><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex= ;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div><div style= =3D"font-family:arial,helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)"= <div> Hello, currently I'm using kvms with pcs&drbd on vms... is there= any ovirt solution for ha with two nodes (storage on local disks) without =
------------1605a0da24624bb2768b1bd18 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable <html> <head> </head> <body> <div style=3D"color: black;"> <div style=3D"color: black;"> <p style=3D"margin: 0 0 1em 0; color: black;">No it is not safe to only use= two nodes as you can end up with split brain.</p> <p style=3D"margin: 0 0 1em 0; color: black;"> So two nodes and an arbiter = node is needed. The arbiter doesn't need to be that fancy.</p> <p style=3D"margin: 0 0 1em 0; color: black;">Also the installer if install= ed with gluster as hosted storage (storage for the engine) will complain if= replica is less than 3.</p> <p style=3D"margin: 0 0 1em 0; color: black;">/Johan</p> </div> <div style=3D"color: black;"> <p style=3D"color: black; font-size: 10pt; font-family: Arial, sans-serif; = margin: 10pt 0;">On December 15, 2017 12:54:14 PM Jarek <jaru@jaru.eu.or= g> wrote:</p> <blockquote type=3D"cite" class=3D"gmail_quote" style=3D"margin: 0 0 0 0.75= ex; border-left: 1px solid #808080; padding-left: 0.75ex;"> <div style=3D"font-family: arial, helvetica, sans-serif; font-size: 12pt; c= olor: #000000"><div>Yes, I checked it but it seems I still need three nodes= - 2 for storage and one smaller for arbiter.<br></div><div>Is it safe to d= eploy it only on two nodes?<br data-mce-bogus=3D"1"></div><div>Am I wrong?<= br data-mce-bogus=3D"1"></div><div><br></div><hr id=3D"zwchr" data-marker= =3D"__DIVIDER__"><div data-marker=3D"__HEADERS__"><b>From: </b>"Sandro Bona= zzola" <sbonazzo@redhat.com><br><b>To: </b>"Jaroslaw Augustynowicz" &= lt;jaru@jaru.eu.org><br><b>Cc: </b>"users" <users@ovirt.org><br><b= pcs& drbd for storage? I know about gluster storage but it needs third = host;/</div></div></div></blockquote><br><div>Did you check <a href=3D= "https://access.redhat.com/documentation/en-us/red_hat_gluster_storage/3.3/= html/administration_guide/creating_arbitrated_replicated_volumes" target=3D= "_blank">https://access.redhat.com/documentation/en-us/red_hat_gluster_stor= age/3.3/html/administration_guide/creating_arbitrated_replicated_volumes</a=
?</div><br><br><div> </div><blockquote class=3D"gmail_quote" style= =3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding= -left:1ex"><div><div style=3D"font-family:arial,helvetica,sans-serif;font-s= ize:12pt;color:rgb(0,0,0)"><div> </div></div></div><br>____________________= ___________________________<br> Users mailing list<br> <a href=3D"mailto:Users@ovirt.org" target=3D"_blank">Users@ovirt.org</a><br=
<div dir=3D"ltr"><p style=3D"color:rgb(0,0,0);font-family:overpass,sans-se= rif;font-weight:bold;margin:0px;padding:0px;font-size:14px;text-transform:u=
<a href=3D"http://lists.ovirt.org/mailman/listinfo/users" rel=3D"noreferrer= " target=3D"_blank">http://lists.ovirt.org/mailman/listinfo/users</a><br> <br></blockquote></div><br><br clear=3D"all"><br>-- <br><div class=3D"gmail= _signature"><div dir=3D"ltr"><div><div dir=3D"ltr"><div><div dir=3D"ltr"><d= iv><div dir=3D"ltr"><div><div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr"= ppercase"><span>SANDRO</span> <span>BONAZZOLA</span></p><p style=3D"co= lor:rgb(0,0,0);font-family:overpass,sans-serif;font-size:10px;margin:0px 0p= x 4px;text-transform:uppercase"><span>ASSOCIATE MANAGER, SOFTWARE ENGINEERI= NG, EMEA ENG VIRTUALIZATION R&D</span></p><p style=3D"font-family:overp= ass,sans-serif;margin:0px;font-size:10px;color:rgb(153,153,153)"><a href=3D= "https://www.redhat.com/" style=3D"color:rgb(0,136,206);margin:0px" target= =3D"_blank">Red Hat <span>EMEA</span></a><br data-mce-bogus=3D"1"></p>= <table style=3D"color:rgb(0,0,0);font-family:overpass,sans-serif;font-size:= medium" border=3D"0"><tbody><tr><td width=3D"100px"><a href=3D"https://red.= ht/sig" target=3D"_blank"><img src=3D"https://www.redhat.com/profiles/rh/th= emes/redhatdotcom/img/logo-red-hat-black.png" width=3D"90" height=3D"auto">= </a><br data-mce-bogus=3D"1"></td><td style=3D"font-size:10px"><div><a href= =3D"https://redhat.com/trusted" style=3D"color:rgb(204,0,0);font-weight:bol= d" target=3D"_blank">TRIED. TESTED. TRUSTED.</a><br data-mce-bogus=3D"1"></= div></td></tr></tbody></table><br></div></div></div></div></div></div></div=
</div></div></div></div></div></div> </div></div><br></div></div> _______________________________________________<br> Users mailing list<br> <a class=3D"aqm-autolink aqm-autowrap" href=3D"mailto:Users%40ovirt.org">Us= ers@ovirt.org</a><br> <a class=3D"aqm-autolink aqm-autowrap" href=3D"http://lists.ovirt.org/mailm= an/listinfo/users">http://lists.ovirt.org/mailman/listinfo/users</a><br> <br></blockquote> </div> </div> </body> </html>
------------1605a0da24624bb2768b1bd18--