This is a multi-part message in MIME format. --------------97603545FA3E5AEFEB71090E Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 8bit On 02/06/2017 08:14 PM, Berger, Sandy wrote:
Ive 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:
The engine VM is running on this host
Connected to domain HostedEngine
Escape character is ^]
error: internal error: cannot find character device <null>
Once this starts occurring, it never works again.
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 its unchecked again when I open up the edit window again.
How do I get console control back from my oVirt hosts?
Hi, it is strongly recommended to use ttyS0 (legacy serial driver emulation) and not hvc0 (newer virtio serial driver) because we had reports of kernel panics (!!!!) using the new driver. 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. In terms of Vm configuration, the console device should have the "consoleType" = "serial" setting. This is the default Engine sends. Not sure what HE is doing here, not if you fix it manually. -- Francesco Romani Red Hat Engineering Virtualization R & D IRC: fromani --------------97603545FA3E5AEFEB71090E Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: 8bit <html> <head> <meta content="text/html; charset=windows-1252" http-equiv="Content-Type"> </head> <body bgcolor="#FFFFFF" text="#000000"> <br> <div class="moz-cite-prefix">On 02/06/2017 08:14 PM, Berger, Sandy wrote:<br> </div> <blockquote cite="mid:DM5PR05MB3161434BD7A421FDC8D5FBCAD5400@DM5PR05MB3161.namprd05.prod.outlook.com" type="cite"> <meta http-equiv="Content-Type" content="text/html; charset=windows-1252"> <meta name="Generator" content="Microsoft Word 15 (filtered medium)"> <style><!-- /* Font Definitions */ @font-face {font-family:"Cambria Math"; panose-1:2 4 5 3 5 4 6 3 2 4;} @font-face {font-family:Calibri; panose-1:2 15 5 2 2 2 4 3 2 4;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0in; margin-bottom:.0001pt; font-size:11.0pt; font-family:"Calibri",sans-serif;} a:link, span.MsoHyperlink {mso-style-priority:99; color:#0563C1; text-decoration:underline;} a:visited, span.MsoHyperlinkFollowed {mso-style-priority:99; color:#954F72; text-decoration:underline;} span.EmailStyle17 {mso-style-type:personal-compose; font-family:"Calibri",sans-serif; color:windowtext;} .MsoChpDefault {mso-style-type:export-only; font-family:"Calibri",sans-serif;} @page WordSection1 {size:8.5in 11.0in; margin:1.0in 1.0in 1.0in 1.0in;} div.WordSection1 {page:WordSection1;} --></style><!--[if gte mso 9]><xml> <o:shapedefaults v:ext="edit" spidmax="1026" /> </xml><![endif]--><!--[if gte mso 9]><xml> <o:shapelayout v:ext="edit"> <o:idmap v:ext="edit" data="1" /> </o:shapelayout></xml><![endif]--> <div class="WordSection1"> <p class="MsoNormal">Ive 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 its 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> </div> </blockquote> <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> </body> </html> --------------97603545FA3E5AEFEB71090E--