在类型为 RAID1 的 LVM 卷上安装 debian 8,GRUB2 找不到卷组

在类型为 RAID1 的 LVM 卷上安装 debian 8,GRUB2 找不到卷组

大家好!

我花了一整天时间尝试在 Debian 8.5 上设置 LVM 类型 Raid1 卷,但服务器无法从它启动。

首先,这是我从 GRUB2 得到的错误:

GRUB2

lvm lvs 和 lvm pvs

这是我采取的步骤,首先我启动到 grml(Live-CD/Rescue-System):(全新 /dev/sda 和 /dev/sdb)

1.然后我在两个驱动器上创建分区:

  • 512M 主 (Linux raid 自动检测)
  • 20G 主 8e (Linux LVM)

2. 现在我为我的 /boot 创建 Raid 并将其格式化为 ext4

  • mdadm --create /dev/md0 --level=1 --raid-disks=2 /dev/sda1 /dev/sdb1
  • mkfs.ext4 /dev/md0

3. 是时候进行卷组了

pvcreate /dev/sda2 pvcreate /dev/sdb2 vgcreate vg0 /dev/sda2 /dev/sdb2

4.我们来到卷并格式化它们

lvcreate -n root -L 20G vg0 --type raid1 lvcreate -n swap -L 4G vg0 --type raid1

root@grml ~ # lvscan ACTIVE '/dev/vg0/root' [10,00 GiB] inherit ACTIVE '/dev/vg0/swap' [4,00 GiB] inherit

mkfs.ext4 /dev/vg0/root mkswap /dev/vg0/swap

5. 挂载卷

mount /dev/vg0/root /mnt cd /mnt mkdir boot mkdir proc mkdir dev mkdir sys mkdir home mount /dev/md0 boot/

  1. 创建 fstab

mkdir etc cd etc vi fstab

`proc /proc   proc   defaults 0 0
/dev/md0 /boot   ext4   defaults 0 2
/dev/vg0/root /              ext4   defaults 0 1
/dev/vg0/swap          none      swap  defaults,pri=1 0 0`

7. debootstrap debian jessie

debootstrap --arch amd64 jessie /mnt ftp://ftp.de.debian.org/debian/

8. 安装一些必需品

mount -t proc none /mnt/proc mount -o bind /dev /mnt/dev mount -o bind /sys /mnt/sys

9. chroot 进入全新的 Debian

chroot /mnt /bin/bash

10.设置新的root密码 passwd

11. 将 contrib 和 non-free 添加到源列表

nano /etc/apt/sources.list

deb http://ftp.de.debian.org/debian jessie main contrib non-free

12.安装软件包

apt-get install mdadm openssh-server lvm2 locales ntp vim-nox firmware-realtek

13. 配置区域设置

dpkg-reconfigure locales tzdata

14.安装内核

apt-get install linux-image-amd64

15. grub2 apt-get install grub2

选择 sda 和 sdb 作为安装设备

grub-install --no-floppy /dev/sda grub-install --no-floppy /dev/sdb update-grub /dev/md0 update-initramfs -u

16.退出并重启

exit shutdown -r now

也许任何人都可以帮助我,我希望我只是忘记了一些事情。

答案1

根据红帽员工

Grub 不支持 LVM RAID1(据我所知它仅支持 RAID 4/5/6 类型)

Debian 8 有一些旧的内部结构,您可能会遇到同样的限制,我想找到一些关于 Grub 限制的官方信息,但不幸的是我失败了。

Re: [linux-lvm] GRUB boot problem with lvm mirror type raid1

From: Peter Rajnoha <prajnoha redhat com>
To: gk180984 interia pl
Cc: LVM general discussion and development <linux-lvm redhat com>
Subject: Re: [linux-lvm] GRUB boot problem with lvm mirror type raid1
Date: Mon, 14 Apr 2014 11:40:36 +0200
On 04/14/2014 10:42 AM, gk180984 interia pl wrote:
Hi
I want to ask it is possible boot root file system (via GRUB) from LVM
RAID1 volume?
I can boot root file system (with /boot) from linera LVM volume and
from mirror volume, but when I create raid1 mirror GRUB can't boot from it:

lvconvert --type raid1 -m1 gsys/vsys

LVM mirror is work:
lvconvert -m1 gsys/vsys

I have two disk and use only LVM, not other raid software.
GRUB have lvm module.
Grub doesn't support LVM RAID1 (it supports only RAID 4/5/6 type IIRC).

However, I don't recommend using /boot on LVM at the moment since
grub support for LVM is limited and unofficial. There's a plan to add
official and more robust support though - there are ongoing discussions
between grub and LVM team...

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