Xen Cluster Management With Ganeti On Debian Etch - Page 5
8 Setting Up LVM On The Free HDD Space
node1/node2:
Let's find out about our hard drive:
fdisk -l
node1:~# fdisk -l
Disk /dev/sda: 53.6 GB, 53687091200 bytes
255 heads, 63 sectors/track, 6527 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 1216 9767488+ 83 Linux
/dev/sda2 1217 1338 979965 82 Linux swap / Solaris
node1:~#
We will now create the partition /dev/sda3 (on both physical nodes) using the rest of the hard drive and prepare it for LVM:
fdisk /dev/sda
node1:~# fdisk /dev/sda
The number of cylinders for this disk is set to 6527.
There is nothing wrong with that, but this is larger than 1024,
and could in certain setups cause problems with:
1) software that runs at boot time (e.g., old versions of LILO)
2) booting and partitioning software from other OSs
(e.g., DOS FDISK, OS/2 FDISK)
Command (m for help): <-- m
Command action
a toggle a bootable flag
b edit bsd disklabel
c toggle the dos compatibility flag
d delete a partition
l list known partition types
m print this menu
n add a new partition
o create a new empty DOS partition table
p print the partition table
q quit without saving changes
s create a new empty Sun disklabel
t change a partition's system id
u change display/entry units
v verify the partition table
w write table to disk and exit
x extra functionality (experts only)
Command (m for help): <-- n
Command action
e extended
p primary partition (1-4)
<-- p
Partition number (1-4): <-- 3
First cylinder (1339-6527, default 1339): <-- ENTER
Using default value 1339
Last cylinder or +size or +sizeM or +sizeK (1339-6527, default 6527): <-- ENTER
Using default value 6527
Command (m for help): <-- t
Partition number (1-4): <-- 3
Hex code (type L to list codes): <-- L
0 Empty 1e Hidden W95 FAT1 80 Old Minix be Solaris boot
1 FAT12 24 NEC DOS 81 Minix / old Lin bf Solaris
2 XENIX root 39 Plan 9 82 Linux swap / So c1 DRDOS/sec (FAT-
3 XENIX usr 3c PartitionMagic 83 Linux c4 DRDOS/sec (FAT-
4 FAT16 <32M 40 Venix 80286 84 OS/2 hidden C: c6 DRDOS/sec (FAT-
5 Extended 41 PPC PReP Boot 85 Linux extended c7 Syrinx
6 FAT16 42 SFS 86 NTFS volume set da Non-FS data
7 HPFS/NTFS 4d QNX4.x 87 NTFS volume set db CP/M / CTOS / .
8 AIX 4e QNX4.x 2nd part 88 Linux plaintext de Dell Utility
9 AIX bootable 4f QNX4.x 3rd part 8e Linux LVM df BootIt
a OS/2 Boot Manag 50 OnTrack DM 93 Amoeba e1 DOS access
b W95 FAT32 51 OnTrack DM6 Aux 94 Amoeba BBT e3 DOS R/O
c W95 FAT32 (LBA) 52 CP/M 9f BSD/OS e4 SpeedStor
e W95 FAT16 (LBA) 53 OnTrack DM6 Aux a0 IBM Thinkpad hi eb BeOS fs
f W95 Ext'd (LBA) 54 OnTrackDM6 a5 FreeBSD ee EFI GPT
10 OPUS 55 EZ-Drive a6 OpenBSD ef EFI (FAT-12/16/
11 Hidden FAT12 56 Golden Bow a7 NeXTSTEP f0 Linux/PA-RISC b
12 Compaq diagnost 5c Priam Edisk a8 Darwin UFS f1 SpeedStor
14 Hidden FAT16 <3 61 SpeedStor a9 NetBSD f4 SpeedStor
16 Hidden FAT16 63 GNU HURD or Sys ab Darwin boot f2 DOS secondary
17 Hidden HPFS/NTF 64 Novell Netware b7 BSDI fs fd Linux raid auto
18 AST SmartSleep 65 Novell Netware b8 BSDI swap fe LANstep
1b Hidden W95 FAT3 70 DiskSecure Mult bb Boot Wizard hid ff BBT
1c Hidden W95 FAT3 75 PC/IX
Hex code (type L to list codes): <-- 8e
Changed system type of partition 3 to 8e (Linux LVM)
Command (m for help): <-- w
The partition table has been altered!
Calling ioctl() to re-read partition table.
WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
The kernel still uses the old table.
The new table will be used at the next reboot.
Syncing disks.
node1:~#
Now let's take a look at our hard drive again:
fdisk -l
node1:~# fdisk -l
Disk /dev/sda: 53.6 GB, 53687091200 bytes
255 heads, 63 sectors/track, 6527 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 1216 9767488+ 83 Linux
/dev/sda2 1217 1338 979965 82 Linux swap / Solaris
/dev/sda3 1339 6527 41680642+ 8e Linux LVM
node1:~#
Looks good. Now we must reboot both physical nodes so that the kernel can read in the new partition table:
shutdown -r now
After the reboot, we prepare /dev/sda3 for LVM on both nodes and add it to the volume group xenvg:
pvcreate /dev/sda3
vgcreate xenvg /dev/sda3
It is recommended to configure LVM not to scan the DRBD devices. Therefore we open /etc/lvm/lvm.conf and replace the filter line as follows:
vi /etc/lvm/lvm.conf
[...] filter = [ "r|/dev/cdrom|", "r|/dev/drbd[0-9]+|" ] [...] |
9 Installing Ganeti
node1/node2:
First, install docbook-utils:
apt-get install docbook-utils
Then download and install Ganeti as follows:
cd /tmp
wget http://ganeti.googlecode.com/files/ganeti-1.2b1.tar.gz
tar xvzf ganeti-1.2b1.tar.gz
cd ganeti-1.2b1
./configure --localstatedir=/var
make
make install
mkdir /srv/ganeti/ /srv/ganeti/os /srv/ganeti/export
Copy the Ganeti init script to /etc/init.d...
cp docs/examples/ganeti.initd /etc/init.d/ganeti
... and tell both nodes to start Ganeti at boot time:
update-rc.d ganeti defaults 20 80
10 Installing The Ganeti Scripts For Debian Etch Instances
node1/node2:
Next we install the scripts that Ganeti needs to install Debian Etch in a virtual machine (or instance):
cd /srv/ganeti/os
wget http://ganeti.googlecode.com/files/instance-debian-etch-0.1.tar
tar xvf instance-debian-etch-0.1.tar
mv instance-debian-etch-0.1 debian-etch
We also need the debootstrap package:
apt-get install debootstrap
