From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pigeon.gentoo.org ([208.92.234.80] helo=lists.gentoo.org) by finch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1S1I5I-0003Mg-AI for garchives@archives.gentoo.org; Sat, 25 Feb 2012 13:54:48 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 3C6D8E074B; Sat, 25 Feb 2012 13:54:35 +0000 (UTC) Received: from svr-us4.tirtonadi.com (svr-us4.tirtonadi.com [69.65.43.212]) by pigeon.gentoo.org (Postfix) with ESMTP id 38CBEE0BA9 for ; Sat, 25 Feb 2012 13:52:08 +0000 (UTC) Received: from mail-vx0-f181.google.com ([209.85.220.181]) by svr-us4.tirtonadi.com with esmtpsa (TLSv1:RC4-SHA:128) (Exim 4.69) (envelope-from ) id 1S1I2j-000w7N-Q3 for gentoo-user@lists.gentoo.org; Sat, 25 Feb 2012 20:52:09 +0700 Received: by vcbfl15 with SMTP id fl15so134921vcb.40 for ; Sat, 25 Feb 2012 05:52:05 -0800 (PST) Received-SPF: pass (google.com: domain of pandu@poluan.info designates 10.52.88.103 as permitted sender) client-ip=10.52.88.103; Authentication-Results: mr.google.com; spf=pass (google.com: domain of pandu@poluan.info designates 10.52.88.103 as permitted sender) smtp.mail=pandu@poluan.info Received: from mr.google.com ([10.52.88.103]) by 10.52.88.103 with SMTP id bf7mr3418275vdb.72.1330177925270 (num_hops = 1); Sat, 25 Feb 2012 05:52:05 -0800 (PST) Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 Received: by 10.52.88.103 with SMTP id bf7mr2711053vdb.72.1330177925196; Sat, 25 Feb 2012 05:52:05 -0800 (PST) Received: by 10.220.119.85 with HTTP; Sat, 25 Feb 2012 05:52:05 -0800 (PST) Received: by 10.220.119.85 with HTTP; Sat, 25 Feb 2012 05:52:05 -0800 (PST) In-Reply-To: <201202251218.59928.michaelkintzios@gmail.com> References: <201202251218.59928.michaelkintzios@gmail.com> Date: Sat, 25 Feb 2012 20:52:05 +0700 Message-ID: Subject: Re: [gentoo-user] Re: Safe way to test a new kernel? From: Pandu Poluan To: gentoo-user@lists.gentoo.org Content-Type: multipart/alternative; boundary=20cf307f3c04b82b2e04b9ca2eb1 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - svr-us4.tirtonadi.com X-AntiAbuse: Original Domain - lists.gentoo.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - poluan.info X-Archives-Salt: bd9aeaef-4023-43ba-a28e-a132f75f05e3 X-Archives-Hash: d4b7e98410a74f1228570e4c26e15e5b --20cf307f3c04b82b2e04b9ca2eb1 Content-Type: text/plain; charset=UTF-8 On Feb 25, 2012 7:22 PM, "Mick" wrote: > > On Saturday 25 Feb 2012 02:32:49 Pandu Poluan wrote: > > On Feb 25, 2012 9:14 AM, "Grant" wrote: > > > >> 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 > > > > Situations like these that made me decide with great conviction to always > > deploy my servers virtualized, even if the box in question will only host a > > single VM. > > > > Now, if I lost my intelligence for a couple of seconds and somehow ended up > > with a VM that's no longer accessible remotely, I just connect to the > > virtual console. > > > > The flip side? Now I'm getting too daring/careless, and the uptime now > > drops below my (self-imposed) target of 99.99% :-P > > What do you do when you need to upgrade the host, rather than the guest? > Since I'm using XenServer, upgrading the host is a well-defined procedure: Either I push the update using XenCenter, or I visit the servers. Usually, I just push minor updates using XenCenter. Rgds, --20cf307f3c04b82b2e04b9ca2eb1 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable


On Feb 25, 2012 7:22 PM, "Mick" <michaelkintzios@gmail.com> wrote:
>
> On Saturday 25 Feb 2012 02:32:49 Pandu Poluan wrote:
> > On Feb 25, 2012 9:14 AM, "Grant" <emailgrant@gmail.com> wrote:
> > > >> I need to test a kernel config change on a remote s= ystem. =C2=A0Is there a
> > > >> safe way to do this? =C2=A0The fallback thing in gr= ub has never worked for
> > > >> me. =C2=A0When does that ever work?
> > > >
> > > > You can press ESC in the Grub screen and it will take y= ou to text-only
> >
> > mode.
> >
> > > > =C2=A0There, you select an entry, press "e" a= nd edit it. =C2=A0Press ENTER when
> >
> > you're
> >
> > > > finished, and then press "b" to boot your mod= ified entry.
> > > >
> > > > That way, you can boot whatever kernel you want if the = current one
> >
> > doesn't
> >
> > > > work.
> > >
> > > I can't do that remotely though. =C2=A0I'm probably = asking for something
> > > that doesn't exist.
> > >
> > > - Grant
> >
> > Situations like these that made me decide with great conviction t= o always
> > deploy my servers virtualized, even if the box in question will o= nly host a
> > single VM.
> >
> > Now, if I lost my intelligence for a couple of seconds and someho= w ended up
> > with a VM that's no longer accessible remotely, I just connec= t to the
> > virtual console.
> >
> > The flip side? Now I'm getting too daring/careless, and the u= ptime now
> > drops below my (self-imposed) target of 99.99% :-P
>
> What do you do when you need to upgrade the host, rather than the gues= t?
>

Since I'm using XenServer, upgrading the host is a well-defined proc= edure: Either I push the update using XenCenter, or I visit the servers. Us= ually, I just push minor updates using XenCenter.

Rgds,

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