<div dir="ltr"><div dir="ltr"><div class="gmail_default" style="font-size:small">On Tue, Nov 13, 2018 at 3:37 AM Yannis Milios <<a href="mailto:yannis.milios@gmail.com">yannis.milios@gmail.com</a>> wrote:<br></div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">As far as I know, Proxmox does not need 3 nodes and/or a quorum, and the<br>
LINSTOR controller does not care either.<br></blockquote><div><br></div><div>Thanks for confirming this Robert. </div><div>In my experience, Promox requires a minimum 3 nodes when HA is enabled/required. When HA is enabled, and one of the 2 cluster nodes goes down, then HA will not function properly, due to not enough remaining votes for a working,healthy cluster. </div></div></div></blockquote><div><br></div><div style="font-size:small" class="gmail_default">Not if you set:</div><div style="font-size:small" class="gmail_default"><br></div><div style="font-size:small" class="gmail_default">quorum {<br> provider: corosync_votequorum<br> two_node: 1</div><div style="font-size:small" class="gmail_default">...<br></div><div style="font-size:small" class="gmail_default">}<br><br></div><div style="font-size:small" class="gmail_default">in the corosync config file.</div><div style="font-size:small" class="gmail_default"></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div class="gmail_quote"><div>Since LINSTOR controller functionality in Proxmox is based on HA (VM), that will (indirectly) affect also LINSTOR availability, as the HA VM used to host it, will stop functioning as soon as Proxmox cluster (corosync) looses the quorum majority, hence my recommendation of 3 nodes.<br></div><div><br></div><div>Yannis</div></div></div></blockquote></div></div></div>