Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.debian.user > #242986

Re: telling if we've actually booted from /boot/xen-4.14-amd64.gz

Show all headers | View raw

[Multipart message — attachments visible in raw view] - view raw

Hi Tim,

On Fri, Dec 10, 2021 at 10:11:04PM +0000, Tim Woodall wrote:
> Is there a simple way to tell if the kernel/hypervisor that was used to
> boot is the one currently installed in /boot.

I do not do this - I build my own hypervisor packages when there is
an upstream XSA that affects me and then I have to schedule downtime
to boot into it, so I am well aware of what is booted into what.

However, it seems you can read the ELF build ID from the kernel file
and also from "xl info" (or /sys/hypervisor/properties/buildid if
you decode it). Please see attached file check_running_hypervisor.sh
for an example.

Cheers,
Andy

-- 
https://bitfolk.com/ -- No-nonsense VPS hosting

Back to linux.debian.user | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

telling if we've actually booted from /boot/xen-4.14-amd64.gz Tim Woodall <debianuser@woodall.me.uk> - 2021-12-10 23:20 +0100
  Re: telling if we've actually booted from /boot/xen-4.14-amd64.gz Charles Curley <charlescurley@charlescurley.com> - 2021-12-11 04:40 +0100
    Re: telling if we've actually booted from /boot/xen-4.14-amd64.gz Tim Woodall <debianuser@woodall.me.uk> - 2021-12-11 07:00 +0100
      Re: telling if we've actually booted from /boot/xen-4.14-amd64.gz Charles Curley <charlescurley@charlescurley.com> - 2021-12-11 19:10 +0100
        Re: telling if we've actually booted from /boot/xen-4.14-amd64.gz Andrei POPESCU <andreimpopescu@gmail.com> - 2021-12-12 09:10 +0100
    Re: telling if we've actually booted from /boot/xen-4.14-amd64.gz Charles Curley <charlescurley@charlescurley.com> - 2021-12-11 22:00 +0100
  Re: telling if we've actually booted from /boot/xen-4.14-amd64.gz Andy Smith <andy@strugglers.net> - 2021-12-12 02:30 +0100
    Re: telling if we've actually booted from /boot/xen-4.14-amd64.gz Tim Woodall <debianuser@woodall.me.uk> - 2021-12-12 08:20 +0100
      Re: telling if we've actually booted from /boot/xen-4.14-amd64.gz Tim Woodall <debianuser@woodall.me.uk> - 2021-12-12 16:20 +0100

csiph-web