Need Help, How can get the full install log

[Lucas Liu]

Thank you so much! That was very helpful. Have a nice day!


Lucas

On Tue, Sep 27, 2022 at 4:01 PM Erik Skultety <eskultet at redhat.com> wrote:

> On Wed, Sep 21, 2022 at 01:53:20PM +0800, Lucas Liu wrote:
> > Gratings:
> >
> > Recently, I got an error while installing a guest, the error message is
> > this,:
> > [image: image.png]
> >
> > Is there a method to get the full log? I have tried to use virt-install
> > --console, or attach <log
> > file="/var/log/libvirt/qemu/guestname-serial0.log" append="off"/>  to get
> > the full log, but they didn't work.
>
> They didn't work because the serial console isn't enabled on the kernel
> cmdline
> by default, so you'll need to pass "--extra-args 'console=ttyS0,112500'"
> when
> installing a guest with virt-install. Note that once installed, you'll
> need to
> tweak /etc/default/grub to enable serial console permanently for that VM,
> otherwise you'll have a character device but no serial output would be
> relayed
> there.
>
> I also recommend to use "--autoconsole text" instead of "--console xyz" for
> your purpose as "--console" is a generic character device which you need
> to (at
> least somehow) configure, while "--autoconsole" is syntactic sugar that
> does
> the magic for you.
>
> PS: in case you'd like to install guests from pre-built templates with
> virt-builder from the guestfs-tools package then these have been built so
> that
> /etc/default/grub was already tweaked to enable serial output, hence
> "--extra-args" could be completely omitted in that case and you'd only use
> "--autoconsole text" --> you can give it a try to observe the difference :)
>
> Regards,
> Erik
>
>
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