[arch-general] Failover to LTS in the Arch boot processt?

[Chris Bannister]

During early boot you can get kexec to load it as a panic kernel, but
by then its too late I would have though.

2009/9/25 Aaron Griffin <aaronmgriffin at gmail.com>:
> On Fri, Sep 25, 2009 at 11:31 AM, David C. Rankin
> <drankinatty at suddenlinkmail.com> wrote:
>> Guys,
>>
>> I'm curious. Since there is now an LTS kernel, has anyone thought about adding
>> a few lines of code to the Arch boot process that would provide for automatic
>> failover to the LTS kernel in the event the normal kernel failed to load
>> during the boot process. The thought is to provide redundancy for servers in
>> the case where the regular kernel becomes corrupt (for whatever reason, disk
>> problem, etc...) and a reboot is forced (exhausted UPS, etc..)
>>
>> I don't know what it would take or if it is doable. I had just envisioned
>> adding a trap that catches the failure of the regular kernel to boot, checks
>> for the presence of the LTS kernel, and if installed boots the LTS kernel in
>> this case.
>>
>> I haven't looked deep enough into the Arch boot process to know if it is
>> feasible, but it just seemed like a good bit of extra protection that Arch
>> could provide for server installs where the server operates on the regular
>> kernel but also has LTS installed as a backup.
>>
>> I'll leave it to the gurus to consider. If it's not doable or not worth doing,
>> then just consider it another of my stray thoughts worthy of the DEL key ;-)
>
> You can't do something like this beyond the bootloader. Once anything
> has started at boot, you have chosen a kernel and cannot go back.
>
> I think, however, grub has something to do this
>