Re: [gentoo-user] Re: Safe way to test a new kernel?

[Robert David]

V Sat, 25 Feb 2012 10:32:20 -0800
Grant <emailgrant@×××××.com> napsáno:

> >> >> I need to test a kernel config change on a remote system.  Is
> >> >> there a safe way to do this?  The fallback thing in grub has
> >> >> never worked for me.  When does that ever work?
> >> >
> >> >
> >> > You can press ESC in the Grub screen and it will take you to
> >> > text-only mode. There, you select an entry, press "e" and edit
> >> > it. Press ENTER when you're finished, and then press "b" to boot
> >> > your modified entry.
> >> >
> >> > That way, you can boot whatever kernel you want if the current
> >> > one doesn't work.
> >>
> >> I can't do that remotely though.  I'm probably asking for something
> >> that doesn't exist.
> >>
> >> - Grant
> >>
> >
> > Don't do that if you don't have some tool like KVM, or other remote
> > management of the server. Or if it is available in the data center,
> > just call them and order this service for the time you need to do
> > updates.
> >
> > This is why I don't use gentoo on servers any more, just because
> > I rather stay safe than sorry.
>
> How is another distro different in this situation?
>
> - Grant

Just because when using distros like Centos/RHEL or Debian stable, you
have very little chance that the kernel released will fail. Due to
extensive testing, user base and update policy. And major kernel update
you done only once in few years and the transition is tested before
release done (though you are supposed to test yourself to be safe).

This is not saying that gentoo is bad, I'm very big fan of gentoo.
But you have to concern where it use and where not. 

Robert.  


>
>
> > But if you really need to do that (and you don't have any chance to
> > get KVM attached), just create an virtual machine with backup of
> > your server and test that kernel there, and check that you have all
> > the modules you need on the server. But this is the last thing I
> > would do.
> >
> >
> > Good luck,
> > Robert.
>