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
