------=_Part_869_900338456.1397586237056 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit If I lose the host with the engine manager, will HA still function? ------=_Part_869_900338456.1397586237056 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 7bit <html><body><div style="font-family: times new roman, new york, times, serif; font-size: 12pt; color: #000000"><div>If I lose the host with the engine manager, will HA still function?<br data-mce-bogus="1"></div></div></body></html> ------=_Part_869_900338456.1397586237056--
Hi： James， Please describe your environment. I guess, If you just have two host in your cluster, one of them fail, No HA. 2014-04-16 2:23 GMT+08:00 Maurice James <mjames@media-node.com>:
If I lose the host with the engine manager, will HA still function?
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
-- 独立之思想，自由之精神。 --陈寅恪
------=_Part_54_1012912014.1397614019292 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable 3 Node system consists of 2 host nodes and 1 manager node. If the manager g= oes offline, will VMs marked as HA still be highly available if there is no= manager?=20 ----- Original Message ----- From: "=E9=80=82=E5=85=95" <lijiangsheng1@gmail.com>=20 To: "Maurice James" <mjames@media-node.com>=20 Cc: users@ovirt.org=20 Sent: Tuesday, April 15, 2014 9:28:06 PM=20 Subject: ***UNCHECKED*** Re: [ovirt-users] HA question=20 Hi=EF=BC=9A=20 James=EF=BC=8C=20 Please describe your environment.=20 I guess, If you just have two host in your cluster, one of them fail, No HA= .=20 2014-04-16 2:23 GMT+08:00 Maurice James < mjames@media-node.com > :=20 If I lose the host with the engine manager, will HA still function?=20 _______________________________________________=20 Users mailing list=20 Users@ovirt.org=20 http://lists.ovirt.org/mailman/listinfo/users=20 --=20 =E7=8B=AC=E7=AB=8B=E4=B9=8B=E6=80=9D=E6=83=B3=EF=BC=8C=E8=87=AA=E7=94=B1=E4= =B9=8B=E7=B2=BE=E7=A5=9E=E3=80=82=20 --=E9=99=88=E5=AF=85=E6=81=AA=20 ------=_Part_54_1012912014.1397614019292 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable <html><body><div style=3D"font-family: times new roman, new york, times, se= rif; font-size: 12pt; color: #000000"><div><br></div><div>3 Node system con= sists of 2 host nodes and 1 manager node. If the manager goes offline, will= VMs marked as HA still be highly available if there is no manager?</div><d= iv><br></div><div><br></div><div><br></div><hr id=3D"zwchr"><div style=3D"c= olor:#000;font-weight:normal;font-style:normal;text-decoration:none;font-fa= mily:Helvetica,Arial,sans-serif;font-size:12pt;" data-mce-style=3D"color: #= 000; font-weight: normal; font-style: normal; text-decoration: none; font-f= amily: Helvetica,Arial,sans-serif; font-size: 12pt;"><b>From: </b>"=E9=80= =82=E5=85=95" <lijiangsheng1@gmail.com><br><b>To: </b>"Maurice James"= <mjames@media-node.com><br><b>Cc: </b>users@ovirt.org<br><b>Sent: </= b>Tuesday, April 15, 2014 9:28:06 PM<br><b>Subject: </b>***UNCHECKED*** Re:= [ovirt-users] HA question<br><div><br></div><div dir=3D"ltr">Hi=EF=BC=9A<d= iv> James=EF=BC=8C</div><div> Please describe your = environment. </div><div><br></div><div> I guess, If you just hav= e two host in your cluster, one of them fail, No HA.</div><div><br></div><d= iv> </div></div><div class=3D"gmail_extra"><br><div><br></div><d= iv class=3D"gmail_quote">2014-04-16 2:23 GMT+08:00 Maurice James <span dir= =3D"ltr"><<a href=3D"mailto:mjames@media-node.com" target=3D"_blank" dat= a-mce-href=3D"mailto:mjames@media-node.com">mjames@media-node.com</a>></= span>:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;bord= er-left:1px #ccc solid;padding-left:1ex" data-mce-style=3D"margin: 0 0 0 .8= ex; border-left: 1px #ccc solid; padding-left: 1ex;"><div><div style=3D"fon= t-size:12pt;font-family:times new roman,new york,times,serif" data-mce-styl= e=3D"font-size: 12pt; font-family: times new roman,new york,times,serif;"><= div>If I lose the host with the engine manager, will HA still function?<br>= </div></div></div><br>_______________________________________________<br> U= sers mailing list<br> <a href=3D"mailto:Users@ovirt.org" target=3D"_blank" = data-mce-href=3D"mailto:Users@ovirt.org">Users@ovirt.org</a><br> <a href=3D= "http://lists.ovirt.org/mailman/listinfo/users" target=3D"_blank" data-mce-= href=3D"http://lists.ovirt.org/mailman/listinfo/users">http://lists.ovirt.o= rg/mailman/listinfo/users</a><br> <br></blockquote></div><br><br clear=3D"a= ll"><div><br></div>-- <br>=E7=8B=AC=E7=AB=8B=E4=B9=8B=E6=80=9D=E6=83=B3=EF= =BC=8C=E8=87=AA=E7=94=B1=E4=B9=8B=E7=B2=BE=E7=A5=9E=E3=80=82<br> &nbs= p; --= =E9=99=88=E5=AF=85=E6=81=AA</div></div><div><br></div></div></body></html> ------=_Part_54_1012912014.1397614019292--
Hi： As I know, oVirt-engine is a Center control System. and node is stateless read only system. So answer is if manager was failure, No HA ,even the node don't know each other. 2014-04-16 10:06 GMT+08:00 Maurice James <mjames@media-node.com>:
3 Node system consists of 2 host nodes and 1 manager node. If the manager goes offline, will VMs marked as HA still be highly available if there is no manager?
------------------------------ *From: *"适兕" <lijiangsheng1@gmail.com> *To: *"Maurice James" <mjames@media-node.com> *Cc: *users@ovirt.org *Sent: *Tuesday, April 15, 2014 9:28:06 PM *Subject: ****UNCHECKED*** Re: [ovirt-users] HA question
Hi： James， Please describe your environment.
I guess, If you just have two host in your cluster, one of them fail, No HA.
2014-04-16 2:23 GMT+08:00 Maurice James <mjames@media-node.com>:
If I lose the host with the engine manager, will HA still function?
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
-- 独立之思想，自由之精神。 --陈寅恪
-- 独立之思想，自由之精神。 --陈寅恪
the answer is no. HA vm's are re-run by the engine in case of a failure so in case the engine is down no actions will be done on vms. On 04/16/2014 03:06 AM, Maurice James wrote:
3 Node system consists of 2 host nodes and 1 manager node. If the manager goes offline, will VMs marked as HA still be highly available if there is no manager?
------------------------------------------------------------------------ *From: *"适 兕" <lijiangsheng1@gmail.com> *To: *"Maurice James" <mjames@media-node.com> *Cc: *users@ovirt.org *Sent: *Tuesday, April 15, 2014 9:28:06 PM *Subject: ****UNCHECKED*** Re: [ovirt-users] HA question
Hi： James， Please describe your environment.
I guess, If you just have two host in your cluster, one of them fail, No HA.
2014-04-16 2:23 GMT+08:00 Maurice James <mjames@media-node.com <mailto:mjames@media-node.com>>:
If I lose the host with the engine manager, will HA still function?
_______________________________________________ Users mailing list Users@ovirt.org <mailto:Users@ovirt.org> http://lists.ovirt.org/mailman/listinfo/users
-- 独立之思想，自由之精神。 --陈寅恪
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
-- Dafna Ron
you need to be more clear on your question it seems very general :) do you mean, if the engine is down will power management still work? If so, than the answer is no and with good reason... (lots of them actually). starting from the simplest - if the host reboots and the engine is down, most users will not know how to restart the vms without the engine. even if you do know how to start the vm's without the engine, once you restore the engine, there is a chance of split brain. Dafna On 04/15/2014 07:23 PM, Maurice James wrote:
If I lose the host with the engine manager, will HA still function?
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
-- Dafna Ron
----- Original Message -----
From: "Dafna Ron" <dron@redhat.com> To: users@ovirt.org Sent: Wednesday, April 16, 2014 11:58:00 AM Subject: Re: [ovirt-users] HA question
you need to be more clear on your question it seems very general :)
do you mean, if the engine is down will power management still work? If so, than the answer is no and with good reason... (lots of them actually). starting from the simplest - if the host reboots and the engine is down, most users will not know how to restart the vms without the engine. even if you do know how to start the vm's without the engine, once you restore the engine, there is a chance of split brain.
two comments here 1) If engine is restored and hosts are still non responding hosts will be soft fenced and if that fails if PM is configured then engine will still try to restart the hosts 2) We have an issue in hosted engine when the restart command can leave the Host in DOWN state
Dafna
On 04/15/2014 07:23 PM, Maurice James wrote:
If I lose the host with the engine manager, will HA still function?
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
-- Dafna Ron _______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
participants (4)
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Dafna Ron -
Eli Mesika -
Maurice James -
适兕