<div dir="ltr"><div>Hello and sorry for soo late response of mine, I somehow missed your answer.</div><div><br></div><div>Sure let me share a bit of useful information on the count.</div><div>First of all the system specific things are:</div><div>- Hypervisor is a usual VMware product - VSphere<br></div><div>- VMs OS is: Ubuntu 18.04 LTS<br></div><div>- Pacemaker is of version: 1.1.18-0ubuntu1.1</div><div><br></div><div>And yes it's IProute, that has a version - 4.15.0-2ubuntu1</div><div><br></div><div>To be mentioned that after I moved to another way of handling this (with set failure-timeout ) I haven't seen any errors so far, on-fail action still remains "restart".<br></div><div>But it's obvious, failure-timeout just clears all fail counters for me, so I don't see any fails now.<br></div><div><br></div><div>Another thing to be mentioned, that monitor functionality for IPaddr2 resource was failing in the years past as well, I just didn't pay much attention on that.<br>That time VM machines under my control were working over Ubuntu 14.04 and hypervisor was - Proxmox of the branch 5+ (cannot exactly remember the version, perhaps that was 5.4+).<br></div><div><br></div><div>For one this could be a critical case indeed, since sometimes an absence of IP address (for a certain DB for e.g. with loading of hundreds of thousands SQL requests) can lead to a huge out age.</div><div>I don't have the first idea of how to investigate this further. But, I have a staging setup where my hands are not tied, so let me know if we can research something.</div><div><br></div><div>And have a nice day!<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Oct 7, 2019 at 7:21 PM Jan Pokorný <<a href="mailto:jpokorny@redhat.com">jpokorny@redhat.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Donat,<br>
<br>
On 07/10/19 09:24 -0500, Ken Gaillot wrote:<br>
> If this always happens when the VM is being snapshotted, you can put<br>
> the cluster in maintenance mode (or even unmanage just the IP<br>
> resource) while the snapshotting is happening. I don't know of any<br>
> reason why snapshotting would affect only an IP, though.<br>
<br>
it might be interesting if you could share the details to grow the<br>
shared knowledge and experience in case there are some instances of<br>
these problems reported in the future.<br>
<br>
In particular, it'd be interesting to hear:<br>
<br>
- hypervisor<br>
<br>
- VM OS + if plain oblivious to running virtualized,<br>
or "the optimal arrangement" (e.g., specialized drivers, virtio,<br>
"guest additions", etc.)<br>
<br>
(I think IPaddr2 is iproute2-only, hence in turn, VM OS must be Linux)<br>
<br>
Of course, there might be more specific things to look at if anyone<br>
here is an expert with particular hypervisor technology and the way<br>
the networking works with it (no, not me at all).<br>
<br>
-- <br>
Poki<br>
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ClusterLabs home: <a href="https://www.clusterlabs.org/" rel="noreferrer" target="_blank">https://www.clusterlabs.org/</a></blockquote></div><br clear="all"><br>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><br></div><div dir="ltr"><div dir="ltr"><font style="background-color:rgb(255,255,255)" color="#0b5394">Best regards,<br></font></div><div dir="ltr"><font style="background-color:rgb(255,255,255)" color="#0b5394">Donat Zenichev<br><br></font></div></div></div></div></div></div></div></div>