From: Yaniv Kaul <ykaul@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@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 =
--Apple-Mail=_9545B43A-6071-46DF-A6C0-EC3F1563FEE9 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 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 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@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 Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
--Apple-Mail=_9545B43A-6071-46DF-A6C0-EC3F1563FEE9 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8 <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@redhat.com</a>></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@gmail.com</a>> 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@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@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>= --Apple-Mail=_9545B43A-6071-46DF-A6C0-EC3F1563FEE9--