Alpine Linux配置磁盘¶
Alpine Linux提供了 setup-alpine
来完成系统配置,不过,磁盘设置比较复杂,并没有完全覆盖在 setup-alpine
中,可以通过 setup-disk
工具来完成,以便传递一些特殊的分区参数。
Disk layouts¶
alpine linux使用了 extlinux
作为默认bootloader,这个bootloader不能处理LVM卷上的 /boot
,所以必须将 /boot
分区独立,不能位于加密或LVM卷(Grub2能够处理LVM卷的/boot)。通常我们会创建一个很小的分区作为 /boot
,然后将其余磁盘作为一个独立分区或者作为LVM卷,或者构建RAID。
典型的磁盘设置:
One-disk system
---------------
+------------------------------------------------+
| small partition (32--100M), holding |
| only /boot, filesystem needn't be journaled |
+------------------------------------------------+
| rest of disk in second partition |
| +------------------------------------------+ |
| | cryptsetup volume | |
| | +-------------------------------------+ | |
| | | LVM PV, containing single VG, | | |
| | | containing multiple LVs, holding | | |
| | | /, /home, swap, etc | | |
| | +-------------------------------------+ | |
| +------------------------------------------+ |
+------------------------------------------------+
Two-disk system
---------------
+------------------------------------------------+ +------------------------------------------------+
| small partition (32--100M), holding | | small partition (32--100M), holding | These 2 partitions might
| only /boot, filesystem needn't be journaled | | only /boot, filesystem needn't be journaled | form a mirrored (RAID1)
+------------------------------------------------+ +------------------------------------------------+ volume
| rest of disk in second partition | | rest of disk in second partition |
| T================================================================================================T | These 2 partitions form
| T +--------------------------------------------------------------------------------------------+ T | a second mirrored
| T | cryptsetup volume | T | (RAID1) volume
| T | +---------------------------------------------------------------------------------------+ | T |
| T | | LVM PV, containing single VG, | | T |
| T | | containing multiple LVs, holding | | T |
| T | | /, /home, swap, etc | | T |
| T | +---------------------------------------------------------------------------------------+ | T |
| T +--------------------------------------------------------------------------------------------+ T |
| T================================================================================================T |
| | | |
+------------------------------------------------+ +------------------------------------------------+
手工分区¶
安装镜像值包含了一个非常基础的 busybox
内建的 fdisk
命令,这个命令和常规Linux发行版 fdisk
有比较大的差异,使用很不习惯。主要是显示参数采用 Cylinder
而不是 Sectors
。不过,可以安装常规的分区工具 sfdisk
(scriptable fdisk), gptfdisk
, parted
, cfdisk
(text menus) 甚至是 gparted
(需要设置图形环境)
安装 parted分区工具
apk add parted
警告
在使用分区前,需要 Alpine Linux本地备份