Section 2 Preparing the Host System
We have already completed sections 2.1-2.4 in the previous blog.Section 2.5 'Creating a File System on the Partition'
Section 2.5 drones on about the 'ext' family of file systems, which I am not using. In addition I need to create a fat32 system on the EFI esp partition, and create some swap. Since I will be using ZFS, I will create a ZPOOL and the subsuquent file systems.My deviations from the book include running the following commands:
gentoo@livecd ~ $ sudo mkfs.fat -F 32 /dev/nvme0n1p1
mkfs.fat 4.0 (2016-05-06)
gentoo@livecd ~ $ sudo mkswap /dev/nvme0n1p2
Setting up swapspace version 1, size = 32 GiB (34359734272 bytes)
no label, UUID=f17abe47-d409-489e-920b-4b8341f3f1a8
gentoo@livecd ~ $ sudo swapon /dev/nvme0n1p2
gentoo@livecd ~ $ free
total used free shared buff/cache available
Mem: 65871904 1453280 61927076 88796 2491548 63707984
Swap: 33554428 0 33554428
gentoo@livecd ~ $ sudo zpool create -o ashift=12 -o cachefile=/mnt/cdrom/scratch/lfs_root.cache -o comment="LFS Root" rootPool /dev/nvme0n1p6
gentoo@livecd ~ $ sudo zfs create rootPool/root_fs
gentoo@livecd ~ $ sudo zfs create rootPool/root_fs/home
gentoo@livecd ~ $ sudo zfs create rootPool/root_fs/usr
gentoo@livecd ~ $ sudo zfs create rootPool/root_fs/opt
gentoo@livecd ~ $ sudo zfs create rootPool/root_fs/usr/src
gentoo@livecd ~ $ sudo zfs create rootPool/root_fs/tmp
gentoo@livecd ~ $ sudo mkdir /rootPool/root_fs/esp
gentoo@livecd ~ $ sudo mount /dev/nvme0n1p1 /rootPool/root_fs/esp
gentoo@livecd ~ $ sudo zfs snapshot -r rootPool@init
gentoo@livecd ~ $ sudo zpool list
NAME SIZE ALLOC FREE EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT
gentooScratch 3.72G 565M 3.17G - 16% 14% 1.00x ONLINE -
rootPool 119G 206K 119G - 0% 0% 1.00x ONLINE -
gentoo@livecd ~ $ sudo zfs list
NAME USED AVAIL REFER MOUNTPOINT
gentooScratch 564M 3.05G 79.1M /gentooScratch
gentooScratch/persistentHomeGentoo 418M 3.05G 335M /home/gentoo
gentooScratch/persistentPortageDistfiles 714K 3.05G 660K /usr/portage/distfiles
gentooScratch/persistentPortageTmp 28K 3.05G 19K /tmp/portage
gentooScratch/scripts 101K 3.05G 23.5K /gentooScratch/scripts
gentooScratch/scripts/data 40.5K 3.05G 22.5K /gentooScratch/scripts/data
gentooScratch/sources 65.3M 3.05G 19K /gentooScratch/sources
gentooScratch/sources/gentoo 205K 3.05G 19K /gentooScratch/sources/gentoo
gentooScratch/sources/gentoo/cpuid2cpuflags 159K 3.05G 123K /gentooScratch/sources/gentoo/cpuid2cpuflags
gentooScratch/sources/lfs_book 65.0M 3.05G 62.0M /gentooScratch/sources/lfs_book
rootPool 196K 115G 19K /rootPool
rootPool/root_fs 115K 115G 20K /rootPool/root_fs
rootPool/root_fs/home 19K 115G 19K /rootPool/root_fs/home
rootPool/root_fs/opt 19K 115G 19K /rootPool/root_fs/opt
rootPool/root_fs/tmp 19K 115G 19K /rootPool/root_fs/tmp
rootPool/root_fs/usr 38K 115G 19K /rootPool/root_fs/usr
rootPool/root_fs/usr/src 19K 115G 19K /rootPool/root_fs/usr/src
Eight steps down... lots to go.
Section 2.6 Setting the $LFS Variable
We need to setup the LFS variable, since we want this to be persistent and set everytime we reboot, we will update our persitence scripts.The /mnt/cdrom/scratch/mountfs.sh contents will be updated to also import our new LFS pool:
#!/bin/bash -x
# Script removes the existing directories on the Gentoo LiveUSB
# Then the script imports the persistent zfs storage, including
# mounting/replacing the removed directories. Finally the script
# creates a new snapshot marking the begining of the live session.
rm -rf /usr/portage/distfiles
rm -rf /tmp/portage
rm -rf /home/gentoo
zpool import -a -c /mnt/cdrom/scratch/zfs_bootstrap.cache
zfs snapshot -r gentooScratch@`date +Persistence_Remount_%Y%h%d_%H%M%S.%N`
# Now the script will import our LFS root pool for the target system,
# create a new snapshot marking the begining of this LFS modification
# session, and then restore any gentoo/lfs values needed
zpool import -a -c /mnt/cdrom/scratch/lfs_root.cache
mount /dev/nvme0n1p1 /rootPool/root_fs/esp
zfs snapshot -r rootPool@`date +Persistence_Remount_%Y%h%d_%H%M%S.%N`
# Restore the portage settings, and the LFS bootstrap packages/settings.
/gentooScratch/scripts/restoreGentooEnv.sh
The updated /gentooScratch/scripts/restoreGentooEnv.sh becomes:
#!/bin/bash -x
# Restore make/portage settings for this box.
cp /gentooScratch/scripts/data/make.conf /etc/portage/make.conf
cp /gentooScratch/scripts/data/00cpuflags /etc/portage/package.use/
# Restore needed gentoo packages
emerge app-text/tidy-html5
# Setup our LFS environment
export LFS=/rootPool/root_fs/
cp /gentooScratch/scripts/data/lfs_var.sh /etc/profile.d
And the new /gentooScratch/scripts/data/lfs_var.sh file is:
export LFS=/rootPool/root_fs/
Of course we create a new snapshot to mark this improvement.
sudo zfs snapshot -r gentooScratch/scripts@lfs_varNow we will reboot to ensure that LFS is properly set. Upon logging back in:
gentoo@livecd ~ $ echo $LFS
/rootPool/root_fs/
gentoo@livecd ~ $ df -h
Filesystem Size Used Avail Use% Mounted on
udev 10M 4.0K 10M 1% /dev
/dev/sda1 29G 5.9G 23G 21% /mnt/cdrom
tmpfs 32G 33M 32G 1% /.unions/memory
aufs 32G 33M 32G 1% /
/dev/loop0 2.0G 2.0G 0 100% /mnt/livecd
none 32G 20K 32G 1% /mnt/aufs-rw-branch
tmpfs 6.3G 1.7M 6.3G 1% /run
shm 32G 0 32G 0% /dev/shm
cgroup_root 10M 0 10M 0% /sys/fs/cgroup
vartmp 32G 36K 32G 1% /var/tmp
tmp 32G 4.0K 32G 1% /tmp
gentooScratch 3.2G 79M 3.1G 3% /gentooScratch
gentooScratch/scripts 3.1G 0 3.1G 0% /gentooScratch/scripts
gentooScratch/scripts/data 3.1G 0 3.1G 0% /gentooScratch/scripts/data
gentooScratch/sources 3.1G 0 3.1G 0% /gentooScratch/sources
gentooScratch/sources/gentoo 3.1G 0 3.1G 0% /gentooScratch/sources/gentoo
gentooScratch/sources/gentoo/cpuid2cpuflags 3.1G 128K 3.1G 1% /gentooScratch/sources/gentoo/cpuid2cpuflags
gentooScratch/sources/lfs_book 3.1G 62M 3.1G 2% /gentooScratch/sources/lfs_book
gentooScratch/persistentHomeGentoo 3.4G 338M 3.1G 10% /home/gentoo
gentooScratch/persistentPortageTmp 3.1G 0 3.1G 0% /tmp/portage
gentooScratch/persistentPortageDistfiles 3.1G 640K 3.1G 1% /usr/portage/distfiles
rootPool 116G 0 116G 0% /rootPool
rootPool/root_fs 116G 0 116G 0% /rootPool/root_fs
rootPool/root_fs/home 116G 0 116G 0% /rootPool/root_fs/home
rootPool/root_fs/opt 116G 0 116G 0% /rootPool/root_fs/opt
rootPool/root_fs/tmp 116G 0 116G 0% /rootPool/root_fs/tmp
rootPool/root_fs/usr 116G 0 116G 0% /rootPool/root_fs/usr
rootPool/root_fs/usr/src 116G 0 116G 0% /rootPool/root_fs/usr/src
/dev/nvme0n1p1 1.2G 4.0K 1.2G 1% /rootPool/root_fs/esp
none 32G 8.0K 32G 1% /run/user/1000
Nine steps down... lots to go.
Section 2.7 Mounting the new Partition
We will be basically skipping this step. ZPool management automounts the filesystems as seen in the previous output, furthermore this mounting and LFS are persistent by re-running our mountfs.sh script.Ten steps down... lots to go.
Section 3 Packages and Patches
Section 3.1 Introduction
Rather then create a new directory for the sources, we just create a descendant ZFS file system, and the the permissions as specified:sudo zfs create rootPool/root_fs/sources
sudo zfs create rootPool/root_fs/sources/lfs_tarballs
sudo chmod -v a+wt $LFS/sources
sudo chmod -v a+wt $LFS/sources/lfs_tarballs
sudo zfs snapshot -r rootPool/root_fs/sources@init
We will start with the 'easy way' using the wget-list file provided by the book and downloading all the packages and patches.
wget --input-file=/gentooScratch/sources/lfs_book/book_output/wget-list --continue --directory-prefix=$LFS/sources/lfs_tarballs/ 2&> $LFS/sources/tarball_download.log
pushd $LFS/sources/lfs_tarballs
md5sum -c /gentooScratch/sources/lfs_book/book_output/md5sums
popd
sudo zfs snapshot rootPool/root_fs/sources/lfs_tarballs@initial_download
This lists 7 files as not being downloaded, all of which appear to be related to SSL connections to the sourceforge server. My initial guess is an expired certificate, so I will attempt to re-download them using a non ssl connection, relying on the MD5 sums to validate the source. [I know MD5 is no longer considered secured, it is possible, though not probable, that a MITM attack could replace the source tar with a file that appears to be valid and has a valid md5sum, but this is so little of a chance... and later on where possible I plan on cloning source repositories...]
The list of packages that were not downloaded was:
- e2fsprogs-1.45.1.tar.gz
- expat-2.2.6.tar.bz2
- expect5.45.4.tar.gz
- procps-ng-3.3.15.tar.xz
- psmisc-23.2.tar.xz
- tcl8.6.9-src.tar.gz
- xz-5.2.4.tar.xz
So now quite a bit of time has been spent getting the packages, so for now we will call that a session.
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