<br><div class="gmail_quote">On 24 September 2010 20:43, Lars Ellenberg <span dir="ltr"><<a href="mailto:lars.ellenberg@linbit.com">lars.ellenberg@linbit.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div class="im">On Fri, Sep 24, 2010 at 02:35:04PM +0200, Pavlos Parissis wrote:<br>
> Hi,<br>
><br>
> Here is a situation from which I want either automatic (by the cluster) or<br>
> manually (by the admin) to recover from.<br>
><br>
> DRBD resource runs on node 1<br>
> shutdown all nodes in a such order which will not cause a failover of the<br>
> resources<br>
> start the node 2 which was secondary prior the shutdown.<br>
><br>
> As we know DRBD wont let the cluster to start up the drbd resource because<br>
> is marked outdated.<br>
> what would be the correct way to recover from this situation?<br>
<br>
</div>If I understand correctly, your scenario is that the only data left is<br>
an outdated secondary, you have catastrophically lost the good data at<br>
the Primary site.<br></blockquote><div><br>You understood correctly.<br> <br></div><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
The Outdated one will refuse to be promoted.<br>
<br>
That is easily changed by drbdadm -- --force primary $resoucename.<br></blockquote><div><br>I found this related thread<br><a href="http://www.gossamer-threads.com/lists/drbd/users/15380#15380">http://www.gossamer-threads.com/lists/drbd/users/15380#15380</a><br>
where it is mentioned to use <font color="black" size="2"><font color="black" size="2">--overwrite-data-of-peer, isn;t it necessary anymore</font></font>?<br>I guess when the old primary is back online his data will be overwritten anyways.<br>
<br></div><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
(older drbd versions may need to low-level modify the metadata<br>
with drbdmeta show-gi/set-gi).<br>
<br>
You should definetly not automate this, as it would render all the<br>
effort we do to "outdate" disconnected secondaries useless.<br></blockquote><div><br>OK, I understand the reasons.<br><br><br>Thanks for your reply,<br>Pavlos<br><br></div></div><br>