10:06 a.m.
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I=E2=80=99ve seen this sort of happen on my systems, the gateway ip goes =
down for some reason, and the engine restarts repeatedly, rending it =
unusable, even though it=E2=80=99s on the same ip subnet as all the host =
boxes and can still talk to the VDSMs. In my case, it doesn=E2=80=99t =
hurt the cluster or DC, but it=E2=80=99s annoying and unnecessary in my =
environment where the gateway isn=E2=80=99t important for cluster =
communications..
I can understand why using the ip of the gateway became a test as a =
proxy for network connectivity, but it seems like it=E2=80=99s something =
that isn=E2=80=99t always valid and maybe the local admin should have a =
choice of how it=E2=80=99s used. Something like the current fencing =
option for =E2=80=9C50% hosts down=E2=80=9D as a double check, if you =
can still reach the vdsm hosts, don=E2=80=99t restart the engine vm.
-Darrell
From: Yaniv Kaul <ykaul(a)redhat.com>
Subject: Re: [ovirt-users] ovirt and gateway behavior
Date: February 6, 2018 at 2:40:14 AM CST
To: Alex
Cc: Ovirt Users
=20
=20
=20
On Feb 5, 2018 2:21 PM, "Alex K" <rightkicktech(a)gmail.com =
<mailto:rightkicktech@gmail.com>> wrote:
Hi all,=20
=20
I have a 3 nodes ovirt 4.1 cluster, self hosted on top of glusterfs. =
The cluster
is used to host several VMs.=20
I have observed that when gateway is lost (say the gateway device is
=
down) the ovirt cluster goes down.=20
=20
Is the cluster down, or just the self-hosted engine?=20
=20
=20
It seems a bit extreme behavior especially when one does not care if =
the hosted
VMs have connectivity to Internet or not.=20
=20
Are the VMs down?=20
The hosts?=20
Y.=20
=20
=20
Can this behavior be disabled?
=20
Thanx,=20
Alex
=20
_______________________________________________
Users mailing list
Users(a)ovirt.org <mailto:Users@ovirt.org>
http://lists.ovirt.org/mailman/listinfo/users =
<http://lists.ovirt.org/mailman/listinfo/users>
=20
=20
_______________________________________________
Users mailing list
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http://lists.ovirt.org/mailman/listinfo/users
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<html><head><meta http-equiv=3D"Content-Type"
content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" =
class=3D"">I=E2=80=99ve seen this sort of happen on my systems, the =
gateway ip goes down for some reason, and the engine restarts =
repeatedly, rending it unusable, even though it=E2=80=99s on the same ip =
subnet as all the host boxes and can still talk to the VDSMs. In my =
case, it doesn=E2=80=99t hurt the cluster or DC, but it=E2=80=99s =
annoying and unnecessary in my environment where the gateway isn=E2=80=99t=
important for cluster communications..<div class=3D""><br =
class=3D""></div><div class=3D"">I can understand why
using the ip of =
the gateway became a test as a proxy for network connectivity, but it =
seems like it=E2=80=99s something that isn=E2=80=99t always valid and =
maybe the local admin should have a choice of how it=E2=80=99s used. =
Something like the current fencing option for =E2=80=9C50% hosts down=E2=80=
=9D as a double check, if you can still reach the vdsm hosts, don=E2=80=99=
t restart the engine vm.</div><div class=3D""><br
class=3D""></div><div =
class=3D""> -Darrell<br
class=3D""><div><blockquote type=3D"cite" =
class=3D""><hr style=3D"border:none;border-top:solid #B5C4DF =
1.0pt;padding:0 0 0 0;margin:10px 0 5px 0;" class=3D""><span =
style=3D"margin: -1.3px 0.0px 0.0px 0.0px" id=3D"RwhHeaderAttributes"
=
class=3D""><font face=3D"Helvetica" size=3D"4"
color=3D"#000000" =
style=3D"font: 13.0px Helvetica; color: #000000" class=3D""><b
=
class=3D"">From:</b> Yaniv Kaul <<a
href=3D"mailto:ykaul@redhat.com" =
class=3D"">ykaul(a)redhat.com</a>&gt;</font></span><br
class=3D"">
<span style=3D"margin: -1.3px 0.0px 0.0px 0.0px"
class=3D""><font =
face=3D"Helvetica" size=3D"4" color=3D"#000000"
style=3D"font: 13.0px =
Helvetica; color: #000000" class=3D""><b
class=3D"">Subject:</b> Re: =
[ovirt-users] ovirt and gateway behavior</font></span><br
class=3D"">
<span style=3D"margin: -1.3px 0.0px 0.0px 0.0px"
class=3D""><font =
face=3D"Helvetica" size=3D"4" color=3D"#000000"
style=3D"font: 13.0px =
Helvetica; color: #000000" class=3D""><b
class=3D"">Date:</b> February =
6, 2018 at 2:40:14 AM CST</font></span><br class=3D"">
<span style=3D"margin: -1.3px 0.0px 0.0px 0.0px"
class=3D""><font =
face=3D"Helvetica" size=3D"4" color=3D"#000000"
style=3D"font: 13.0px =
Helvetica; color: #000000" class=3D""><b
class=3D"">To:</b> =
Alex</font></span><br class=3D"">
<span style=3D"margin: -1.3px 0.0px 0.0px 0.0px"
class=3D""><font =
face=3D"Helvetica" size=3D"4" color=3D"#000000"
style=3D"font: 13.0px =
Helvetica; color: #000000" class=3D""><b
class=3D"">Cc:</b> Ovirt =
Users</font></span><br class=3D"">
<br class=3D"Apple-interchange-newline"><div
class=3D""><div dir=3D"auto" =
class=3D""><div class=3D""><br
class=3D""><div class=3D"gmail_extra"><br =
class=3D""><div class=3D"gmail_quote">On Feb 5, 2018 2:21 PM,
"Alex K" =
<<a href=3D"mailto:rightkicktech@gmail.com" =
class=3D"">rightkicktech(a)gmail.com</a>&gt; wrote:<br
type=3D"attribution" =
class=3D""><blockquote class=3D"quote" style=3D"margin:0 0
0 =
.8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir=3D"ltr" =
class=3D""><div class=3D""><div
class=3D""><div class=3D"">Hi all, <br =
class=3D""><br class=3D""></div><div
class=3D"">I have a 3 nodes ovirt =
4.1 cluster, self hosted on top of glusterfs. The cluster is used to =
host several VMs. <br class=3D""></div>I have observed that when
gateway =
is lost (say the gateway device is down) the ovirt cluster goes down. =
<br
class=3D""></div></div></div></blockquote></div></div></div><div
=
dir=3D"auto" class=3D""><br
class=3D""></div><div dir=3D"auto" =
class=3D"">Is the cluster down, or just the self-hosted =
engine? </div><div dir=3D"auto" class=3D""><br
class=3D""></div><div =
dir=3D"auto" class=3D""><div
class=3D"gmail_extra"><div =
class=3D"gmail_quote"><blockquote class=3D"quote"
style=3D"margin:0 0 0 =
.8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir=3D"ltr" =
class=3D""><div class=3D""><div
class=3D""><br class=3D""></div>It seems =
a bit extreme behavior especially when one does not care if the hosted =
VMs have connectivity to Internet or not. <br =
class=3D""></div></div></blockquote></div></div></div><div
dir=3D"auto" =
class=3D""><br class=3D""></div><div
dir=3D"auto" class=3D"">Are the VMs =
down? </div><div dir=3D"auto" class=3D"">The
hosts? </div><div =
dir=3D"auto" class=3D"">Y. </div><div
dir=3D"auto" class=3D""><br =
class=3D""></div><div dir=3D"auto"
class=3D""><div =
class=3D"gmail_extra"><div
class=3D"gmail_quote"><blockquote =
class=3D"quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc =
solid;padding-left:1ex"><div dir=3D"ltr"
class=3D""><div class=3D""><br =
class=3D""></div><div class=3D"">Can this behavior be
disabled?<br =
class=3D""><br class=3D""></div><div
class=3D"">Thanx, <br =
class=3D""></div><div class=3D"">Alex<br
class=3D""></div></div>
<br class=3D"">______________________________<wbr =
class=3D"">_________________<br class=3D"">
Users mailing list<br class=3D"">
<a href=3D"mailto:Users@ovirt.org"
class=3D"">Users(a)ovirt.org</a><br =
class=3D"">
<a href=3D"http://lists.ovirt.org/mailman/listinfo/users" =
rel=3D"noreferrer" target=3D"_blank" =
class=3D"">http://lists.ovirt.org/<wbr =
class=3D"">mailman/listinfo/users</a><br class=3D"">
<br class=3D""></blockquote></div><br
class=3D""></div></div></div>
_______________________________________________<br class=3D"">Users =
mailing list<br class=3D""><a href=3D"mailto:Users@ovirt.org"
=
class=3D"">Users(a)ovirt.org</a><br =
class=3D"">http://lists.ovirt.org/mailman/listinfo/users<br =
class=3D""></div></blockquote></div><br
class=3D""></div></body></html>=
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