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"Canek Peláez Valdés" <caneko@×××××.com> wrote: |
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>On Thu, Aug 29, 2013 at 10:47 AM, <gottlieb@×××.edu> wrote: |
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>> I want to reinstall an old system to have combined root+usr. |
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>> |
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>> I have always used an lvm installation guide that was a "companion" |
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>to |
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>> the handbook. That is it would tell you how to augment each handbook |
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>> installation chapter for lvm (actually lvm2). |
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>> |
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>> I can't find this documentation now on gentoo.org. There is a big |
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>wiki |
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>> page, but that is different as are daniel's 2-volume "learning linux |
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>> lvm". |
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>> |
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>> The closest I found is the raid+lvm quick install guide, but i would |
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>be |
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>> happier with the one I have used often in the past. |
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>> |
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>> Any clues (I am emotionally prepared to learn that it is right there |
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>on |
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>> the installation web page, but my eyes and search commands are |
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>> deficient). |
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> |
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>As James said, the docs are being reorganized. However, I did a |
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>systemd+LVM installation (just because I was getting tired of not |
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>knowing what the fuss was all about), and (in my experience) there are |
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>almost no changes from the regular installation in the handbook. |
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> |
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>I put everything in LVM (/, /boot, everything). From my notes, the |
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>only changes are: |
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> |
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>From the livecd: |
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>1. Use partitions, not whole disks (GRUB2 got confused when I tried to |
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>use whole disks). |
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>2. Set the partition type as LVM (8e in fdisk). |
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>3. Create the Physical Volume, the Volume Group, and the Logical |
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>Volumes as desired. |
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>4. Continue the normal installation, just using /dev/vg0/lvolX (or |
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>whatever names you choose). |
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> |
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>After the chroot and emerging the kernel package: |
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>1. Se the LVM options in the kernel. Compile, install it. |
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>2. Emerge systemd. |
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>3. Emerge dracut (USE="device-mapper", DRACUT_MODULES="systemd lvm", at |
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>least). |
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>4. Set add_dracutmodules="systemd" in /etc/dracut.conf. |
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>5. Weirdly, set lvmconf="no" in /etc/dracut.conf. I didn't even |
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>touched /etc/lvm/lvm.conf, so I think leaving it out makes dracut to |
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>autoconfigure it. If I put lvmconf="yes", the boot hangs. Didn't |
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>investigated why. |
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>6. Emerge GRUB2 (USE="device-mapper mount"); I don't know if GRUB |
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>works with LVM, but GRUB2 does, so I used that. |
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>7. Set GRUB_PRELOAD_MODULES="lvm", |
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>GRUB_CMDLINE_LINUX="init=/usr/lib/systemd/systemd", in |
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>/etc/default/grub. |
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>8. Generate initramfs, generate /boot/grub2/grub.cfg, install GRUB2 |
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>with grub2-install. |
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>9. Reboot. Everything works. |
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> |
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>GRUB2 handles LVM just fine, I believe, but my LVM setup was dead |
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>simple (the VG was just the only partition of all my disks). |
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>dracut+systemd takes care of everything else; I didn't even had to do |
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>something special in fstab, since I used labels. |
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> |
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>To extend/reduce your Logical Volumes you will need a livecd, or a |
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>more complex initramfs, though. |
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> |
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>Regards. |
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|
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Canek, |
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|
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LVs can be resized while the system is running. It also depends on the actual filesystem, but extending can be done online with all filesystems I am aware of. |
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Shrinking is not possible with all. |
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|
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-- |
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Joost |
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-- |
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Sent from my Android device with K-9 Mail. Please excuse my brevity. |
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-- |
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Sent from my Android device with K-9 Mail. Please excuse my brevity. |
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