Console of P2V?

[William Kern]

On 5/24/21 3:22 AM, vrms wrote:
>
>
> On 24.05.21 03:12, W wrote:
>> well libvirt has to know about the serial port and attach it to the 
>> console.
>>
>> do you have something like this in your XML file?
>>
>>
>> <serial type='pty'>
>>       <source path='/dev/pts/0'/>
>>       <target type='isa-serial' port='0'>
>>         <model name='isa-serial'/>
>>       </target>
>>       <alias name='serial0'/>
>>     </serial>
>>     <console type='pty' tty='/dev/pts/0'>
>>       <source path='/dev/pts/0'/>
>>       <target type='serial' port='0'/>
>>       <alias name='serial0'/>
>>     </console>
>
> no, I have:
>
>     <serial type='pty'>
>       <target type='isa-serial' port='0'>
>         <model name='isa-serial'/>
>       </target>
>     </serial>
>     <console type='pty'>
>       <target type='serial' port='0'/>
>     </console>
>
> I can edit this with *virsh edit [domain]* but the get the same 
> results as before.
> When I look into the file thereafter, all edits are gone even though I 
> got a success message with the editing
>
>
>
well i typically undefine , edit and then define.  Look at the docs.

It is likely that you have to stop and start the VM any for your system 
to see the new config. I doubt you can hotplug a serial interface.

With that in mind you could simpy dumpxml, stop the VM, edit the XML and 
restart the VM with the edited XML.

Also as a point of reference, a coworker just mentioned the virsh 
ttyconsole command

If the console is there it will tell you which one is configured.


# virsh ttyconsole vm137
/dev/pts/1

otherwise it just exits(1).




>
>>
>>
>>
>> On 5/23/2021 12:52 AM, vrms wrote:
>>
>>> hi William
>>>
>>> On 22.05.21 23:59, William wrote:
>>>> I generally use
>>>>
>>>> GRUB_CMDLINE_LINUX_DEFAULT="console=tty0 console=ttyS0,115200n8"
>>>> and redo grub.cfg (i.e. update-grub, grub2-mkconfig)
>>> thanks for the pointer.
>>>
>>> I literally ran in the guests commandline
>>>
>>>      GRUB_CMDLINE_LINUX_DEFAULT="console=tty0 console=ttyS0,115200n8"
>>>      sudo update-grub
>>>
>>> which did change anything to the behavior on the hosts cli
>>>
>>>     Connected to domain '[domain]'
>>>     Escape character is ^] (Ctrl + ])
>>>
>>> and then nothing
>>>
>>> so ... what is the error I am making?
>>>
>>>
>>>
>>>
>>>
>>>
>>>> On 5/22/2021 2:49 PM, Ken D'Ambrosio wrote:
>>>>>> On 22.05.21 18:52, Ken D'Ambrosio wrote:
>>>>>> ... apologies if this isn't quite the right list, I tried to get the
>>>>>> right one.
>>>>>> But, my problem: I'm firing up a Centos 6.5 box > with virt-install,
>>>>>> [...] and
>>>>>> it boots fine, etc., etc., but I can't get to the console except
>>>>>> through vnc;
>>>>>> "virsh console" just shows a blank screen.
>>>>>> 1. I think this is absolutely the right list for your issue
>>>>> Yay. :-)
>>>>>
>>>>>> 2. is it really blank? or something like
>>>>>>
>>>>>>     Connected to domain '[domain]'
>>>>>>     Escape character is ^] (Ctrl + ])
>>>>> Okay, it *does* say those things -- but that's all it says. <CR> gets
>>>>> me nowhere, as opposed to the other KVM hosts we have running.
>>>>>
>>>>>> 3. If I am not mistaken the guest needs to be configured in a
>>>>>> certain way for
>>>>>> virsh console [domain] to work. I can't say how though
>>>>> Hmmm... well, if anyone knows, I'm all ears.
>>>>>
>>>>> Thanks for the reply!
>>>>>
>>>
>>

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