11:52 a.m.
Hey, all. For one, 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, recently converted from a physical (I did a 'dd' to a
raw image, and converted it to qcow2), and it boots fine, etc., etc.,
but I can't get to the console except through vnc; "virsh console" just
shows a blank screen. Do I need to tell the kernel to boot in ASCII
mode or somesuch?
Thanks!
-Ken
2:41 p.m.
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
2. is it really blank? or something like
Connected to domain '[domain]'
Escape character is ^] (Ctrl + ])
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
4:49 p.m.
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!
4:59 p.m.
I generally use
GRUB_CMDLINE_LINUX_DEFAULT="console=tty0 console=ttyS0,115200n8"
and redo grub.cfg (i.e. update-grub, grub2-mkconfig)
-wk
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!
2:52 a.m.
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!
>
3:28 a.m.
hi,
long time ago, but I remember you needed to modify something in upstart as
well, grub is just bootrapping the operating system, after that the system
needs to have a serial console running to connect to.
Maybe here you will find the golden tip:
https://support.hpe.com/hpesc/public/docDisplay?docId=c03595461&docLo...
hth,
regards,
Natxo
On Sun, May 23, 2021 at 9:53 AM vrms <vrms(a)netcologne.de> 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!
>>
>
--
--
Groeten,
natxo
8:12 p.m.
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>
at that point I just type in "virsh console $DOM" in the command line
# virsh console XXXX
Connected to domain XXXX
Escape character is ^]
XXXX4 login:
I often have to hit the enter key a once or twice to get the login
prompt once connected.
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!
>>
5:22 a.m.
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
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!
>>>
>
11:28 a.m.
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!
>>>>
>>
>
1159
days inactive
1161
days old
8 comments
6 participants
participants (6)
-
Ken D'Ambrosio -
Natxo Asenjo -
vrms -
W -
William
-
William Kern