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|
GNU/Linux Debian Wheezy Server Bringup w/ ZFS
2013 May 30th
Sven Gothel
JogAmp Community
Creative Commons Attribution 3.0 License. http://creativecommons.org/licenses/by/3.0/
+++
Small Pool:
1x ZPool
1x VDEV 2x n TB raidz1 ( 1 + 1 )
or better
1x Mirror
1x VDEV 2x n TB mirror ( 1 + 1 )
Big Pool:
1x ZPool
2x VDEV 3x n TB raidz1 ( 2 + 1 )
+++
Tuning:
- no dedup (huge memory consumption / performance)
- no compression (cheap .. but why ?)
- max ARC cache .. 50/50 ?
- http://www.solarisinternals.com/wiki/index.php/ZFS_Evil_Tuning_Guide#Limiting_the_ARC_Cache
arc_c_min= (16MB?)
arc_c_max= 17179869184 (16GB) (50% of 32GB)
arc.c = arc.c_max
arc.p = arc.c / 2
or
# ARC: 0 - 12 GB
echo options zfs zfs_arc_max=12884901888 >> /etc/modprobe.d/zfs.conf
echo zfs zfs_arc_max=12884901888 >> /etc/initramfs-tools/modules
17179869184 # 0x400000000 (16 GB)
12884901888 # 0x300000000 (12 GB)
8589934592 # 0x200000000 ( 8 GB)
4294967296 # 0x100000000 ( 4 GB)
1073741824 # 0x040000000 ( 1 GB)
536870912 # 0x020000000 (.5 GB)
Note: 'cat /sys/module/zfs/parameters/zfs_arc_max' shows you the current value on a running system!
- Dedup Ram: 5GB of RAM per Terrabyte of storage ?
- Advanced Format 4096 byte blocks -> ashift=12 ?!
+++
Install:
1 Boot in Debian Rescue mode
1.0 Install on USB drive
- No DESKTOP, ..
- Leave 1-2GB available for extra ext4 boot partition
to mitigate grub's lack of ZFS support!!
/dev/sdc USB drive
/dev/sdc1 root
/dev/sdc2 boot2
1.1 Network Setup ..
1.1.1 Manual Setup /etc/network/interfaces
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet static
address a.b.c.d
netmask 255.255.255.255
dns-nameservers a.b.c.d 1.2.3.4 5.6.7.8
gateway 1.2.3.4
iface eth0 inet6 static
address a:b:c:d:::1:1
netmask 64
up ip -6 route add fe80::1 dev eth0
down ip -6 route del fe80::1 dev eth0
up ip -6 route add default via fe80::1 dev eth0
down ip -6 route del default via fe80::1 dev eth0
- echo jogamp.org > /etc/hostname
/etc/init.d/hostname.sh start
2 Boot USB drive
2.0 Old md superblock ?
Example: /dev/sdb is autodetected as md0:
- mdadm --manage --stop /dev/md0
- mdadm --zero-superblock /dev/sdb
2.1 Fix /etc/apt/sources.list
- remove dvd driver
- add 'wheezy main contrib non-free' net source
- cp -a apt-sources.list /etc/apt/sources.list
'apt-sources.list':
deb http://ftp.debian.org/debian/ wheezy main contrib non-free
deb-src http://ftp.debian.org/debian/ wheezy main contrib non-free
deb http://security.debian.org/ wheezy/updates main contrib
deb-src http://security.debian.org/ wheezy/updates main contrib
deb http://ftp.de.debian.org/debian/ wheezy-updates main contrib non-free
deb-src http://ftp.de.debian.org/debian/ wheezy-updates main contrib non-free
2.2 Install ZFS on USB drive (Script './apt-install-zfs_kernel_etc.sh'):
- wget http://archive.zfsonlinux.org/debian/pool/main/z/zfsonlinux/zfsonlinux_1%7Ewheezy_all.deb
- dpkg -i zfsonlinux_1~wheezy_all.deb
- apt-get update
- apt-get upgrade
- apt-get install linux-base linux-image-amd64 linux-headers-amd64 util-linux
- apt-get install debian-zfs libzfs-dev
- apt-get install zfs-initramfs
- apt-get install vim
- Edit /etc/default/zfs
- ZFS_MOUNT='no'
+ ZFS_MOUNT='yes'
- Fix /usr/share/initramfs-tools/scripts/zfs issues:
--- /usr/share/initramfs-tools/scripts/zfs 2013-03-27 04:14:41.000000000 +0100
+++ initramfs-tools.scripts.zfs 2013-06-04 04:20:23.278131866 +0200
@@ -104,7 +104,7 @@
echo ""
echo "Manually import the root pool at the command prompt and then exit."
echo "Hint: Try: zpool import -f -R / -N $ZFS_RPOOL"
- /bin/sh
+ # /bin/sh
fi
if [ -z "$ZFS_BOOTFS" ]
- ARC Mem config (assume 32GB ram)
# ARC: 0 - 12 GB
echo options zfs zfs_arc_max=12884901888 >> /etc/modprobe.d/zfs.conf
echo zfs zfs_arc_max=12884901888 >> /etc/initramfs-tools/modules
depmod -a
Note: 'cat /sys/module/zfs/parameters/zfs_arc_max' shows you the current value on a running system!
2.3 Gather some specs ..
- Gather hdd UUIDs
- $ ls -l /dev/disk/by-uuid
lrwxrwxrwx 1 root root 10 11. Okt 18:02 53cdad3b-4b01-4a6c-a099-be1cdf1acf6d -> ../../sda2
- Check whether hdd uses Advanced Formating, i.e. blk size 4096 instead of 512.
- apt-get install smartmontools
- smartctl -a /dev/sda, .. etc .. see whether (Adv. Format) is listed
- if any disk uses Adv. Format -> "zfs create -o ashift=12 jogamp07 .."
However, to be future-proof, it is recommended to always use 4096 block size for ZFS.
You won't be able to change your pool later.
2.4 Config zfs on sda sdb
- Below we use 'jogamp07' as the zfs pool name,
it's best to replace it w/ a meaningful name, i.e. your hostname.
Below is scripted in './zfs01-create_config-pool.sh' (using jogamp07 as pool name)
- Create zpool
- mirror: if cheap redundancy is more important than size and disks == 2
- zpool create -f -o ashift=12 jogamp07 mirror /dev/disk/by-id/uuid1 /dev/disk/by-id/uuid2
- .. else zraid:
- zpool create -f -o ashift=12 jogamp07 raidz1 /dev/disk/by-id/ata...
- -f -> overwrite existing partition table / data
- ashift=12 -> blocksize 2096
- Config zpool
- zpool autoexpand=on jogamp07
- zpool autoreplace=on jogamp07
- zpool listsnapshots=on jogamp07
- Config root dataset (for all datasets)
- zfs set dedup=off jogamp07
- zfs set compression=off jogamp07
- zfs set atime=off jogamp07
- zfs set mountpoint=none jogamp07
- Swap (Ram 32G, CPU x86_64 == 4k page size)
- zfs create jogamp07/swap -V 33G -b 4K
- zfs set checksum=off jogamp07/swap
ZVOL should be either:
/dev/zvol/jogamp07/swap -> ../../zd0
/dev/zvol/swap
/dev/jogamp07/swap
- mkswap -f /dev/zvol/jogamp07/swap
Below is scripted in './zfs02-create-datasets.sh' (using jogamp07 as pool name)
- Create Datasets
Separation of system/* and the other (users, ..)
allows moving onto another OS/distri while maintaining the data.
- zfs create -o mountpoint=none jogamp07/system
- zfs create -o mountpoint=/ jogamp07/system/debian7_01
# Skip: Will fail w/ zfs-initramfs, mount of /var is too late
# Skip: zfs create jogamp07/system/debian7_01/var
- zfs create -o mountpoint=/home jogamp07/users
- zfs create -o mountpoint=/root jogamp07/users/root
- zfs create -o mountpoint=/data jogamp07/data
- zfs create -o mountpoint=/srv jogamp07/services
Below is scripted in './zfs03-export_import.sh' (using jogamp07 as pool name)
- Set zfs pool bootfs
- zpool set bootfs=jogamp07/system/debian7_01 jogamp07
- Export zfs pool
- zpool export jogamp07
- Import zfs pool
- zpool import -f -R /mnt/new jogamp07
- Ensure zpool.cache exists:
- zpool set cachefile=/etc/zfs/zpool.cache jogamp07
- Copy zpool.cache:
- mkdir -p /mnt/new/etc/zfs
- cp -a /etc/zfs/zpool.cache /mnt/new/etc/zfs
2.5 Grub Config
- cp grub_custom.cfg /boot/grub/custom.cfg
- edit /boot/grub/custom.cfg to match your partitions / UUID, e.g.:
menuentry "zfs_01" {
load_video
insmod gzio
insmod part_msdos
insmod ext2
set root='(hd2,msdos1)'
search --no-floppy --fs-uuid --set=root 187bf74d-d4c3-4138-a61a-d4bfb4bc5052
linux /boot/vmlinuz-3.2.0-4-amd64 boot=zfs rpool=jogamp07 bootfs=jogamp07/system/debian7_01 ro
initrd /boot/initrd.img-3.2.0-4-amd64
}
- If not yet installed:
- grub-install --no-floppy /dev/sdc (the USB device!)
- Edit /etc/default/grub:
#GRUB_DEFAULT=0
GRUB_DEFAULT="zfs_01"
- update-grub
2.6 Populate ZFS rootfs
Below is scripted in './zfs04-system-populate.sh'
- See [C1]
- apt-get install debootstrap
- debootstrap --arch amd64 stable /mnt/new ftp://ftp.de.debian.org/debian/
- Setup /mnt/new/etc/network/interfaces
- In case you use same /etc/network/interfaces (scripted):
mv /mnt/new/etc/network/interfaces /mnt/new/etc/network/interfaces.orig
cp -a /etc/network/interfaces /mnt/new/etc/network/interfaces
cp -a /etc/udev/rules.d/70-persistent-net.rules /mnt/new/etc/udev/rules.d/
- Or redo 1.1.1 (Mind that you do it for rootfs on /mnt/new)
- Redo: 2.1 Fix /etc/apt/sources.list (probably just the servers)
-In case you use same apt sources (scripted):
mv /mnt/new/etc/apt/source.list /mnt/new/etc/apt/sources.list.orig
cp -a /etc/apt/sources.list /mnt/new/etc/apt/source.list
- Or redo 2.1
2.6 Chroot ZFS rootfs
- Mount essentials # './chroot-mount.sh':
mount --bind /dev /mnt/new/dev
mount --bind /proc /mnt/new/proc
mount --bind /sys /mnt/new/sys
- chroot /mnt/new /bin/bash # './chroot-chroot.sh'
2.7 Refine / Config System
- Root passord: passwd
- apt-get update
- apt-get upgrade
- apt-get install vim locales
- dpkg-reconfigure locales tzdata
LANG: en_US.UTF-8, LANGUAGE=en_US:en
TZ: your choice
- apt-get install ssh ntp htop iotop rsync xz-utils p7zip-full
2.8 ZFS on new System
- Redo: 2.2 Install ZFS on USB drive (Script './apt-install-zfs_kernel_etc.sh')
2.9 Leave New System / Final Touches
- Mount USB rootfs in new system
- mkdir -p /mnt/usbroot
- Use root partition on USB stick (-> 1.0)
- Edit /etc/fstab, i.e.:
UUID=187bf74d-d4c3-4138-a61a-d4bfb4bc5052 /mnt/usbroot ext4 errors=remount-ro 0 2
- mount /mnt/usbroot
- rm -rf /boot
- ln -s /mnt/usbroot/boot /boot
- umount /mnt/usbroot
- Exit from chroot
- umount proc/dev/sys './chroot-umount.sh'
You may need to:
- umount -l /mnt/new/dev
Reset zfs pool cache ..
- zpool export jogamp07
- zpool import -N jogamp07
- zpool set cachefile=/etc/zfs/zpool.cache jogamp07
- update-initramfs -u -k all
-
X.1 Skip: Grub 2.00 Derivates / Boot
Note: All failed detecting ZFS rootfs properly!
- Manually build grub 2.00 (ZFS support) [C2]
- dpkg -P grub2 grub-pc grub-common grub-pc-bin grub2-common
- Build Grub
- apt-get install bzr
- apt-get install gettext bison flex libdevmapper-dev
- apt-get install python autoconf automake autogen
Do the following from a user account:
- Skip: Grub 2.00 (not working .. zfs 'unknown filesystem')
wget ftp://ftp.gnu.org/gnu/grub/grub-2.00.tar.gz
tar xzf grub-2.00.tar.gz
cd grub-2.00
- Skip Using bazar repo revno: 5022
bzr branch http://bzr.savannah.gnu.org/r/grub/trunk/grub
git clone --branch snapshot/ubuntu/raring https://github.com/zfsonlinux/grub.git zfs-grub
cd grub
./autogen.sh
./configure --disable-werror --enable-libzfs --enable-device-mapper --enable-efiemu
make
sudo make install
- Skip Using zfs-grub (or ubuntu grub)
git clone --branch snapshot/ubuntu/raring https://github.com/zfsonlinux/grub.git zfs-grub
cd zfs-grub
for i in `cat debian/patches/series`; do patch -p1 < debian/patches/$i 2>&1 | tee -a patch.log ; done
./autogen.sh
./configure --disable-werror --enable-libzfs --enable-device-mapper --enable-efiemu
make
sudo make install
- Install ..
update-initramfs -u -k all
grub-install --no-floppy /dev/sdc (the USB device!)
+++
set timeout=3
set default=0
# Funtoo
menuentry "JogAmp 01" {
insmod zfs
linux /vmlinuz-3.2.0-4-rt-amd64 root=jogamp07/system/debian7_01
initrd /initrd.img-3.2.0-4-rt-amd64
}
+++
References:
[A1] https://en.wikipedia.org/wiki/ZFS
[A2] http://wiki.illumos.org/display/illumos/ZFS
[A3] http://docs.huihoo.com/opensolaris/solaris-zfs-administration-guide/html/index.html
[A4] http://cuddletech.com/ZFSNinja-Slides.pdf
[A5] http://www.solarisinternals.com/wiki/index.php/ZFS_Best_Practices_Guide
[A6] http://www.solarisinternals.com/wiki/index.php/ZFS_Evil_Tuning_Guide
[A7] http://www.cuddletech.com/blog/pivot/entry.php?id=983 (ZFS Compression)
[A8] https://blogs.oracle.com/dap/entry/zfs_compression
[B1] http://zfsonlinux.org/
[B2] http://pthree.org/2012/04/17/install-zfs-on-debian-gnulinux/
[B3] https://wiki.freebsd.org/ZFSTuningGuide
[B4] http://stoneyforest.net/~chris/blog/freebsd/zfs/maint.html
[B5] http://www.funtoo.org/wiki/ZFS_Install_Guide
[C1] http://www.howtoforge.com/installing-debian-wheezy-testing-with-debootstrap-from-a-grml-live-linux-p2
[C2] http://www.gnu.org/software/grub/manual/grub.html
[_1] http://wiki.debian.org/AptPreferences#Pinning
|
