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<div class="moz-cite-prefix">On 02/06/2017 08:14 PM, Berger, Sandy
wrote:<br>
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<p class="MsoNormal">I’ve been running oVirt 4.0.x for a while
now and upgraded the engine and hosts to 4.1. Sometimes, on
both 4.0 and 4.1, trying to run the “hosted-engine –console”
command gives the following results:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-family:"Courier
New"">The engine VM is running on this host<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier
New"">Connected to domain HostedEngine<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier
New"">Escape character is ^]<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier
New"">error: internal error: cannot find character
device <null><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Once this starts occurring, it never works
again.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">When this happens I note that the hvc0
device does not exist in /dev and therefore there is no getty
process running for that device. I notice that the “Enable
VirtIO serial console” box is not checked on the hosted engine
VM but when I check it and click OK it’s unchecked again when
I open up the edit window again.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">How do I get console control back from my
oVirt hosts?<o:p></o:p></p>
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<br>
Hi, <br>
<br>
it is strongly recommended to use ttyS0 (legacy serial driver
emulation) and not hvc0 (newer virtio serial driver) because we had
reports<br>
of kernel panics (!!!!) using the new driver.<br>
We are going to re-evaluate this setting for 4.2.0, and, perhaps,
later 4.1.z, but for 4.1.0 this is still valid.<br>
<br>
In terms of Vm configuration, the console device should have the
"consoleType" = "serial" setting.<br>
<br>
This is the default Engine sends.<br>
<br>
Not sure what HE is doing here, not if you fix it manually.<br>
<br>
<pre class="moz-signature" cols="72">--
Francesco Romani
Red Hat Engineering Virtualization R & D
IRC: fromani</pre>
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