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On Thursday, September 15, 2011 04:54:38 PM Rich Freeman wrote: |
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> On Thu, Sep 15, 2011 at 4:40 PM, Joost Roeleveld <joost@××××××××.org> wrote: |
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> > It is my understanding all the options need to be specified every time |
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> > dracut |
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> > is run to create an initramfs. If this becomes mandatory, will this be |
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> > added |
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> > to the "make" script of the kernel-sources and as such, make this more |
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> > specific? |
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> |
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> There are no plans to make dracut mandatory, unless you're putting root on |
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> lvm or luks or something, and a good initramfs is already needed for that. |
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> |
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> I think /etc/dracut.conf already has just about anything you'd want to be |
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> persistent across runs. |
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That would be a good starting point. Having to type a lengthy commandline each |
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time I update the kernel and/or toolstack will become troublesome and problems |
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will easily occur. |
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Will the ebuild automatically add all the different modules into the |
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/etc/dracut.conf ? |
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Please note, I am asking these questions to put my mind at ease and hopefully |
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be able to explain all this back to the people on gentoo-user. |
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> > Another issue arrises where some of the tools are updated that are also |
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> > in the |
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> > initramfs. Will we then still need to remember to also update the |
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> > initramfs if |
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> > these are needed? |
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> |
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> Potentially - if the tools in the initramfs won't work. That seems unlikely |
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> though - on-disk formats don't really change much and all stuff like mdadm |
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> and lvm tools do is find stuff and pass it along to the kernel which does |
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> the real work. If you migrate your root from raid1 to raid17 and the old |
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> initramfs doesn't understand raid17 then you'll have a problem. I imagine |
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> that if you migrate to raid17, however, you'd have put some thought into |
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> this. |
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Migrating to raid17 (mirrored raid7, where there can be 3 failed disks per |
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raid7?) would require some thought already. |
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> > My server currently uses mdadm raid1 for /, /boot and swap and raid1+lvm |
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> > for |
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> > the rest. This works without the need of an initramfs. |
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> > |
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> > Will this still work? Or will I need to be using dracut instead? |
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> |
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> I suspect that if /usr is on raid1+lvm that you might need dracut. I'm not |
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> 100% sure on that, since in theory the initramfs can find all it needs on |
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> root in this case. However, the goal was to keep it simple. I'd defer to |
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> somebody actually involved with the simple image. |
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If this is the case, then, to me, this is a major regression. As the current |
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toolstack does not need an initramfs. All the lvm-tools are installed on / by |
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default. None of the required tools are under /usr. |
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-- |
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Joost |
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