Rebuilding my infra..
Hi all After screwing my infra with the update to 4.2 (probably a bad manipulation), i am planning a rebuild of the entire infra. First i want to replace my NFS storage with a glusterfs storage. All documentation tell me that i need 3 hosts.. but for the moment i only have 2 but planning to had more later. So does it make sense to start with 2 hosts and use glusterfs as the storage domain(lets says with a replicate of two with all its limitations). If it make sense, 1- what is the best way to do it. 2- how hard will it be to had the 3rd host when available and make it replica 2+arbiter. Also in a setup where i have 3 hosts (replica 2+arbiter) does all the 3 hosts can run users vm? Thanks for your inputs. Carl
If I’m not wrong GlusterFS in oVirt requires 3 hosts. Here’s the RHHI guide, it’s pretty much the same for oVirt: https://access.redhat.com/documentation/en-us/red_hat_hyperconverged_infrast...
On 8 Jan 2018, at 18:10, carl langlois <crl.langlois@gmail.com> wrote:
Hi all
After screwing my infra with the update to 4.2 (probably a bad manipulation), i am planning a rebuild of the entire infra. First i want to replace my NFS storage with a glusterfs storage. All documentation tell me that i need 3 hosts.. but for the moment i only have 2 but planning to had more later.
So does it make sense to start with 2 hosts and use glusterfs as the storage domain(lets says with a replicate of two with all its limitations). If it make sense, 1- what is the best way to do it. 2- how hard will it be to had the 3rd host when available and make it replica 2+arbiter.
Also in a setup where i have 3 hosts (replica 2+arbiter) does all the 3 hosts can run users vm?
Thanks for your inputs.
Carl
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
I should have say replica 3+arbiter when adding the 3rd host. Yes i know that the documentation specified 3 hosts. But if i understand this is to make sure the system is always reliable and that make sense. But my questions is mainly is it possible to start with 2 nodes and had a 3rd one later..when i had the budget. If i am not mistaking Gluster can work with 2 nodes. On Mon, Jan 8, 2018 at 3:15 PM, Vinícius Ferrão <ferrao@if.ufrj.br> wrote:
If I’m not wrong GlusterFS in oVirt requires 3 hosts.
Here’s the RHHI guide, it’s pretty much the same for oVirt: https://access.redhat.com/documentation/en-us/red_hat_ hyperconverged_infrastructure/1.1/html/deploying_red_hat_ hyperconverged_infrastructure/
On 8 Jan 2018, at 18:10, carl langlois <crl.langlois@gmail.com> wrote:
Hi all
After screwing my infra with the update to 4.2 (probably a bad manipulation), i am planning a rebuild of the entire infra. First i want to replace my NFS storage with a glusterfs storage. All documentation tell me that i need 3 hosts.. but for the moment i only have 2 but planning to had more later.
So does it make sense to start with 2 hosts and use glusterfs as the storage domain(lets says with a replicate of two with all its limitations). If it make sense, 1- what is the best way to do it. 2- how hard will it be to had the 3rd host when available and make it replica 2+arbiter.
Also in a setup where i have 3 hosts (replica 2+arbiter) does all the 3 hosts can run users vm?
Thanks for your inputs.
Carl
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
This is a multi-part message in MIME format. ------------160d77f42c13f912780526b09d Content-Type: text/plain; format=flowed; charset="UTF-8" Content-Transfer-Encoding: quoted-printable You can't start the hosted engine storage bin anything less than replica = 3=20 without changing the installer scripts manually. For the third it can be pretty much anything capable of running as an arb= iter. /Johan On January 8, 2018 21:33:25 carl langlois <crl.langlois@gmail.com> wrote:
I should have say replica 3+arbiter when adding the 3rd host.
Yes i know that the documentation specified 3 hosts. But if i understan= d this is to make sure the system is always reliable and that make sense.= But my questions is mainly is it possible to start with 2 nodes and had a 3= rd one later..when i had the budget. If i am not mistaking Gluster can wor= k with 2 nodes.
On Mon, Jan 8, 2018 at 3:15 PM, Vin=C3=ADcius Ferr=C3=A3o <ferrao@if.uf= rj.br> wrote:
If I=E2=80=99m not wrong GlusterFS in oVirt requires 3 hosts.
Here=E2=80=99s the RHHI guide, it=E2=80=99s pretty much the same for o= Virt: https://access.redhat.com/documentation/en-us/red_hat_ hyperconverged_infrastructure/1.1/html/deploying_red_hat_ hyperconverged_infrastructure/
On 8 Jan 2018, at 18:10, carl langlois <crl.langlois@gmail.com> wrot= e:
Hi all
After screwing my infra with the update to 4.2 (probably a bad manipulation), i am planning a rebuild of the entire infra. First i wa= nt to replace my NFS storage with a glusterfs storage. All documentation tel= l me that i need 3 hosts.. but for the moment i only have 2 but planning to= had more later.
So does it make sense to start with 2 hosts and use glusterfs as the storage domain(lets says with a replicate of two with all its limitati= ons). If it make sense, 1- what is the best way to do it. 2- how hard will it be to had the 3rd host when available and make i= t replica 2+arbiter.
Also in a setup where i have 3 hosts (replica 2+arbiter) does all th= e 3 hosts can run users vm?
Thanks for your inputs.
Carl
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
---------- _______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
------------160d77f42c13f912780526b09d 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;">You can't start the hosted en= gine storage bin anything less than replica 3 without changing the installe= r scripts manually.</p> <p style=3D"margin: 0 0 1em 0; color: black;">For the third it can be prett= y much anything capable of running as an arbiter.</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 January 8, 2018 21:33:25 carl langlois <crl.langlois= @gmail.com> 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 dir=3D"ltr"><div>I should have say replica 3+arbiter when adding the 3= rd host.</div><div><br></div>Yes i know that the documentation specified 3 = hosts. But if i understand this is to make sure the system is always reliab= le and that make sense. But my questions is mainly is it possible to start = with 2 nodes and had a 3rd one later..when i had the budget. If i am not mi= staking Gluster can work with 2 nodes.<div><div><br></div><div><br></div></= div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Mon,= Jan 8, 2018 at 3:15 PM, Vin=C3=ADcius Ferr=C3=A3o <span dir=3D"ltr"><<a= href=3D"mailto:ferrao@if.ufrj.br" target=3D"_blank">ferrao@if.ufrj.br</a>&= gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 = 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">If I=E2=80=99m not wron= g GlusterFS in oVirt requires 3 hosts.<br> <br> Here=E2=80=99s the RHHI guide, it=E2=80=99s pretty much the same for oVirt:= <a href=3D"https://access.redhat.com/documentation/en-us/red_hat_hyperconv= erged_infrastructure/1.1/html/deploying_red_hat_hyperconverged_infrastructu= re/" rel=3D"noreferrer" target=3D"_blank">https://access.redhat.com/<wbr>do= cumentation/en-us/red_hat_<wbr>hyperconverged_infrastructure/<wbr>1.1/html/= deploying_red_hat_<wbr>hyperconverged_infrastructure/</a><br> <div><div class=3D"h5"><br> > On 8 Jan 2018, at 18:10, carl langlois <<a href=3D"mailto:crl.langl= ois@gmail.com">crl.langlois@gmail.com</a>> wrote:<br> ><br> > Hi all<br> ><br> > After screwing my infra with the update to 4.2 (probably a bad manipul= ation), i am planning a rebuild of the entire infra. First i want to replac= e my NFS storage with a glusterfs storage. All documentation tell me that i= need 3 hosts.. but for the moment i only have 2 but planning to had more l= ater.<br> ><br> > So does it make sense to start with 2 hosts and use glusterfs as the s= torage domain(lets says with a replicate of two with all its limitations).<= br> > If it make sense,<br> > 1- what is the best way to do it.<br> > 2- how hard will it be to had the 3rd host when available and make it= =C2=A0 replica 2+arbiter.<br> ><br> > Also in a setup where i have 3 hosts (replica 2+arbiter) does all the = 3 hosts can run users vm?<br> ><br> > Thanks for your inputs.<br> ><br> > Carl<br> ><br> </div></div>> ______________________________<wbr>_________________<br> > Users mailing list<br> > <a href=3D"mailto:Users@ovirt.org">Users@ovirt.org</a><br> > <a href=3D"http://lists.ovirt.org/mailman/listinfo/users" rel=3D"noref= errer" target=3D"_blank">http://lists.ovirt.org/<wbr>mailman/listinfo/users= </a><br> <br> </blockquote></div><br></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> ------------160d77f42c13f912780526b09d--
On 1/8/2018 12:38 PM, Johan Bernhardsson wrote:
You can't start the hosted engine storage bin anything less than replica 3 without changing the installer scripts manually.
For the third it can be pretty much anything capable of running as an arbiter.
+1 the arb box can be an old SFP core2duo with a 40-60 GB SSD for most cases. The formula is something like 4k of arbiter space for every "file". For 10-80 VM disk images that would be really minimal. -wk
participants (4)
-
carl langlois -
Johan Bernhardsson -
Vinícius Ferrão -
WK