<div dir="ltr">thanks four your answer. <div style>but still question open.</div><div style><br></div><div style>when i switch off the active node: though this is done reliable for me, the still passive node wants to know for sure and will kill the (already dead) former active node.</div>
<div style>i have no stonith-hardware (and i could not find till now stonith:null what would help for the first) and so i'm still asking whether there is a clean way to change roles ? </div><div style>but maybe the message from Andrew has answered this already. he told: no ! (if i understand right) </div>
<div style><br></div><div style>i thought of something like </div><div style> crm resource demote m_drbd # on active node, and all that resources that depend on drbd:master was stopped</div><div style> crm resource promote m_drbd # on passive node after active node was stopped and !!! the passive node was informed about the active is not active any longer and does not need killed </div>
<div style><br></div><div style>if pm actively stops all the resources and demotes drbd then it knows about this condition ? at least if all stops and demotes succeed. </div><div style><br></div><div style>and again to that drbd-handler organized location-constraint: </div>
<div style>if it tells, that drbd:master must not started on other than n1, it could get started on n1 if n1 would know for sure n2 has gone. </div></div><div class="gmail_extra"><br><br><div class="gmail_quote">2013/6/26 Michael Schwartzkopff <span dir="ltr"><<a href="mailto:misch@clusterbau.com" target="_blank">misch@clusterbau.com</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><u></u>
<div style="font-family:'Monospace';font-size:9pt;font-weight:400;font-style:normal">
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">Am Mittwoch, 26. Juni 2013, 16:36:43 schrieb andreas graeper:</p><div class="im">
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">> hi and thanks.</p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">> a primitive can be moved to another node. how can i move (change roles) of</p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">> drbd:master to the other node ?</p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px"> </p>
</div><p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">Switch off the other node.</p><div class="im">
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px"> </p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px"> </p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">> and will all the depending resources follow?</p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px"> </p>
</div><p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">Depends on your constraints(order/collocation).</p><div class="im">
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px"> </p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px"> </p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">> then i can stop (and start again) corosync on passive node without problem</p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">> (my tiny experience).</p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px"> </p>
</div><p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">Yes.</p><div class="im">
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px"> </p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px"> </p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">> another question: i found a location-constraint (i think it was set by some</p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">> of the handlers in drbd-config):</p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">> </p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">> location drbd:master -INF #uname ne n1</p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">> does this mean: drbd must not get promoted on node other than n1 ?!</p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px"> </p>
</div><p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">Yes. See: Resource fencing in DRBD.</p><div class="im">
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px"> </p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px"> </p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">> i found this in a situation, when n2 had gone and drbd could not get</p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">> promoted on n1, so all the other resources did not start.</p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">> but the problem was not drbd, cause i could manually set it to primary.</p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px"> </p>
</div><p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">Yes. because this location constraint is valid inside the cluster software. Not outside.</p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px"> </p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">-- </p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">Dr. Michael Schwartzkopff</p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">Guardinistr. 63</p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">81375 München</p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px"> </p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">Tel: (0163) 172 50 98</p></div><br>_______________________________________________<br>
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