Xen on CentOS 5 - Notes
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Revision as of 16:38, 24 October 2007 by Sveng@nikhef.nl (talk | contribs) (→System -- Quattor generated)
System -- Quattor generated
- Hostname: kribbe.nikhef.nl
- Kernel: 2.6.18-8.1.8.el5xen
- HD-Layout:
[root@kribbe ~]# sfdisk -l /dev/sdb
Disk /dev/sdb: 60801 cylinders, 255 heads, 63 sectors/track
Units = cylinders of 8225280 bytes, blocks of 1024 bytes, counting from 0
Device Boot Start End #cyls #blocks Id System
/dev/sdb1 * 0+ 32 33- 265041 fd Linux raid autodetect
/dev/sdb2 33 51025 50993 409601272+ fd Linux raid autodetect
/dev/sdb3 51026 58580 7555 60685537+ fd Linux raid autodetect
/dev/sdb4 58581 60800 2220 17832150 5 Extended
/dev/sdb5 58581+ 60147 1567- 12586896 fd Linux raid autodetect
/dev/sdb6 60148+ 60669 522- 4192933+ fd Linux raid autodetect
/dev/sdb7 60670+ 60800 131- 1052226 fd Linux raid autodetect
====================
[root@kribbe ~]# cat /proc/mdstat
Personalities : [raid1]
md0 : active raid1 sdb1[1] sda1[0]
264960 blocks [2/2] [UU]
md3 : active raid1 sdb2[1] sda2[0]
409601152 blocks [2/2] [UU]
md5 : active raid1 sdb3[1] sda3[0]
60685440 blocks [2/2] [UU]
md2 : active raid1 sdb6[1] sda6[0]
4192832 blocks [2/2] [UU]
md4 : active raid1 sdb7[1] sda7[0]
1052160 blocks [2/2] [UU]
md1 : active raid1 sdb5[1] sda5[0]
12586816 blocks [2/2] [UU]
unused devices: <none>
Added to Quattor System
xen 3.1
wget http://bits.xensource.com/oss-xen/release/3.1.0/kernel-3.1-rhel5x/RPMS/i386/xen-3.1.0-1.i386.rpm wget http://bits.xensource.com/oss-xen/release/3.1.0/kernel-3.1-rhel5x/RPMS/i386/kernel-xen-2.6.18-3.1.0.i386.rpm wget http://bits.xensource.com/oss-xen/release/3.1.0/kernel-3.1-rhel5x/RPMS/i386/xen-devel-3.1.0-1.i386.rpm wget http://bits.xensource.com/oss-xen/release/3.1.0/kernel-3.1-rhel5x/SRPMS/xen-3.1.0-1.src.rpm
LVM 2
Due to performance reasons VMs should be installed in LVMs. For recovering a LVM in a Raid-1 see:Recovery of RAID and LVM2 Volumes
Installed Version:
Installed Packages Name : lvm2 Arch : i386 Version: 2.02.16 Release: 3.el5 Size : 5.5 M Repo : installed Summary: Userland logical volume management tools
NOTE: for having the live-migration-posibility we have to look at Cluster-LVM or something like that.
To get started ....
Setting up LVM2 on kribbe
Using /dev/srv resp. /dev/md3 for LVM we have to:
- comment out /dev/md3 in /etc/fstab
- umount /dev/srv (only once)
- Creating the physical volume and XenVG Volumegroup:
[root@kribbe ~]# pvcreate /dev/md3 Physical volume "/dev/md3" successfully created [root@kribbe ~]# vgcreate XenVG /dev/md3 Volume group "XenVG" successfully created
Within this volume-group we can now manage the partitions for the virtual maschines using lvcreate, lvresize, .... commands
