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Date: Tue, 01 Mar 2011 13:11:29 +0100
From: Natanael Copa <ncopa@alpinelinux.org>
To: "Wei Liang(David)" <weiliang@danfoss.com>
Cc: <alpine-devel@lists.alpinelinux.org>
Subject: RE: [alpine-devel] Re: [acf] How to install alpine on btrfs
In-Reply-To: <12E1BE9450B64247A164A199754D2F1F05B98C@DKDN01MX07.danfoss.net>
References: <12E1BE9450B64247A164A199754D2F1F05B802@DKDN01MX07.danfoss.net>
 <20110226155808.32ef06ce@alpinelinux.org>
 <12E1BE9450B64247A164A199754D2F1F05B98C@DKDN01MX07.danfoss.net>
Message-ID: <6374029ac2c3fd835721a903cb41a18b@ytre.org>
User-Agent: Roundcube Webmail/0.5

 On Tue, 1 Mar 2011 04:33:29 +0100, Wei Liang(David) wrote:

> Hi Natanael,
> Thank you very much for the message.
> What I just did is to install the btrfs-progs-0.19-r0.apk downloaded
> from "http://dl-3.alpinelinux.org/alpine/edge/x86/test [1]" ,format 
> my
> partition as btrfs and mount it under /mnt. I did do this "
> echo "kernel/fs/btrfs" > /etc/mkinitfs/modules.d/btrfs
> # add btrfs to features in /etc/mkinitfs/mkinitfs.conf
> ".
>
> But when I type "setup-disk /mnt" ,I got " btrfs is not supported. 
> Only
> ext2 and ext3 are supported". Does it mean that I need to update some
> package?
> Thank you very much again!

 Yes. you will need alpine-conf-2.6 (which is not yet released). You can 
 easily grab it from git though:

 wget 
 http://git.alpinelinux.org/cgit/alpine-conf.git/plain/setup-disk.in

 sh setup-disk.in /mnt

 That said, I also found out that the crc32c kernel module needs to be 
 in the initramfs module. I think its not a dependency due to there are 2 
 ifferent crc32c modules (crc32c and crc32c-intel) where -intel variant 
 is available when sse4 is enabled.

 So to conclude:

 # boot up 2.1.4 iso

 # config basics
 setup-alpine

 # add edge repos
 echo "http://nl.alpinelinux.org/alpine/edge/main" > 
 /etc/apk/repositories
 echo "http://nl.alpinelinux.org/alpine/edge/testing" > 
 /etc/apk/repositories

 # upgrade (you might need do an apk-tools workaround which I skip here)
 apk update
 apk upgrade

 # install needed tools. mkinitfs is for our config modification
 apk add mkinitfs e2fsprogs btrfs-progs

 # add btrfs modules to mkinitfs + needed crc32c
 echo "kernel/crypto/crc32c*" > /etc/mkinitfs/modules.d/btrfs
 echo "kernel/fs/btrfs" >> /etc/mkinitfs/modules.d/btrfs

 # create partitions (mark sda1 as bootable)
 # in this example I have sda1=/boot, sda2=swap and sda3=/
 fdisk /dev/sda

 # create filesystems
 mkfs.ext3 /dev/sda1
 mkswap /dev/sda2
 mkfs.btrfs /dev/sda3

 # mount filesystems
 mount -t btrfs /dev/sda3 /mnt
 mkdir /mnt/boot
 mount -t ext3 /mnt/boot

 # get latest setup-disk from git:
 wget 
 http://git.alpinelinux.org/cgit/alpine-conf.git/plain/setup-disk.in

 # install system on mounted /mnt
 sh setup-disk.in -v /mnt

 # umount and reboot. remove cdrom
 umount /mnt/boot /mnt
 reboot


 I will add btrfs support to mkinitfs and release alpine-conf (with the 
 mentioned setup-disk) asap.

 btw, I think putting / on lvm should work too.

 Thanks!

 -nc




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