|
|
| Line 402: |
Line 402: |
| | | | |
| | If you are having trouble setting the right file context, please have a look at the Xen tips and tricks page. At any rate, turning off SELinux, as some howtos on this subject advise is a very poor workaround. Reading two manual pages (semanage(8) and restorecon(8)), for an extra layer of security is a good trade! | | If you are having trouble setting the right file context, please have a look at the Xen tips and tricks page. At any rate, turning off SELinux, as some howtos on this subject advise is a very poor workaround. Reading two manual pages (semanage(8) and restorecon(8)), for an extra layer of security is a good trade! |
| − |
| |
| − | = Xen Notes, Old Version, to be cleaned up =
| |
| − | == XenServer-3.2 Commercial Version ==
| |
| − | any information can be found on: [http://www.xensource.com/products/xen_enterprise/ xen-doku]
| |
| − | an related links.
| |
| − |
| |
| − | === Installation xenserver ===
| |
| − |
| |
| − |
| |
| − | ====Principle setup====
| |
| − | * VMs are organized in a Virtual Rack (a01-008-210)
| |
| − | * Network: VLAN 1401 (10.97.210.0) and VLAN 158 (192.108.45.0) are configured
| |
| − | * in VMs use xenbr1401(eth1401) for eth0 (internal network)
| |
| − | * in VMs use xenbr1(eth1) for eth1 (external network)
| |
| − |
| |
| − | '''Notes''' To install a new xenserver DOM_0
| |
| − | Local Disk is '''sdb'''
| |
| − | SAN is '''sda'''
| |
| − | If asked '''DONT CREATE A STORAGE REPOSITORY, this will delete ALL VMs in the SAN'''
| |
| − |
| |
| − | ==== Installation Procedure ====
| |
| − | # Boot from xenserver CD
| |
| − | # Set eth0 to ONBOOT=NO, i.e. don't use eth0 during installation
| |
| − | # Configure eth1 with external IP (192.....)
| |
| − | # NTP: 10.97.8.200
| |
| − | # DNS: 10.97.1.192, 10.97.1.191, 141.52.8.18
| |
| − | # ''' NO XEN-STORAGE, disable FLAGS on sdb as well as on sda (SAN)
| |
| − | # Use sdb (local disk) for installation of the base system
| |
| − | # Post Installation:
| |
| − | ## add: /etc/sysconfig/static-routes: any net 10.0.0.0/9 gw 10.97.81
| |
| − | ## edit /etc/resolv.conf add search fzk.de, set 141 as primary nameserver
| |
| − | ## edit /boot/grub/menu.lst, replace hd1,0 with hd0,0
| |
| − | ## Manually setting the default Storage Repository [http://kb.xensource.com/entry!default.jspa?categoryID=18&externalID=329&fromSearchPage=true Manually setting the default Storage Repository (SR)]
| |
| − | ### /etc/smtab: 7c2cbf8e-d22e-46a3-8b3c-7791499e7510 none lvm default auto
| |
| − | ### service srmtab restart
| |
| − | ### service xenagentd start
| |
| − | ## set up vlan:
| |
| − | ### ifup eth0
| |
| − | ### modprobe 8021q
| |
| − | ### vconfig add eth0 1401
| |
| − | ### vconfig add eth0 158
| |
| − | ### Set up the following files accordingly
| |
| − | '''/etc/sysconfig/network-scripts'''
| |
| − |
| |
| − | ==== ifcfg-eth0 =====
| |
| − | DEVICE=eth0
| |
| − | ONBOOT=no
| |
| − | TYPE=Ethernet
| |
| − | HWADDR=00:1a:64:12:80:71
| |
| − | BRIDGE=xenbr0
| |
| − | LINKDELAY=5
| |
| − | check_link_down() { return 1 ; }
| |
| − | ==== ifcfg-eth1 ====
| |
| − | DEVICE=eth1
| |
| − | BOOTPROTO=none
| |
| − | ONBOOT=yes
| |
| − | TYPE=Ethernet
| |
| − | HWADDR=00:1a:64:12:80:73
| |
| − | BRIDGE=xenbr1
| |
| − | LINKDELAY=5
| |
| − | check_link_down() { return 1 ; }
| |
| − | ==== ifcfg-eth1401 ====
| |
| − | DEVICE=eth0.1401
| |
| − | ONBOOT=yes
| |
| − | TYPE=Ethernet
| |
| − | HWADDR=00:1a:64:12:80:71
| |
| − | BRIDGE=xenbr1401
| |
| − | LINKDELAY=5
| |
| − | VLAN=yes
| |
| − | check_link_down() { return 1 ; }
| |
| − | ==== ifcfg-eth158 ====
| |
| − | DEVICE=eth0.158
| |
| − | ONBOOT=yes
| |
| − | TYPE=Ethernet
| |
| − | HWADDR=00:1a:64:12:80:71
| |
| − | BRIDGE=xenbr158
| |
| − | LINKDELAY=5
| |
| − | VLAN=yes
| |
| − | check_link_down() { return 1 ; }
| |
| − | ==== ifcfg-xenbr0 ====
| |
| − | DEVICE=xenbr0
| |
| − | ONBOOT=no
| |
| − | TYPE=Bridge
| |
| − | DELAY=0
| |
| − | STP=off
| |
| − | check_link_down() { return 1 ; }
| |
| − | ==== ifcfg-xenbr1 ====
| |
| − | DEVICE=xenbr1
| |
| − | ONBOOT=yes
| |
| − | TYPE=Bridge
| |
| − | DELAY=0
| |
| − | STP=off
| |
| − | NETMASK=255.255.255.0
| |
| − | IPADDR=192.108.45.86
| |
| − | GATEWAY=192.108.45.1
| |
| − | PEERDNS=yes
| |
| − | check_link_down() { return 1 ; }
| |
| − | ==== ifcfg-xenbr1401 ====
| |
| − | DEVICE=xenbr1401
| |
| − | ONBOOT=yes
| |
| − | TYPE=Bridge
| |
| − | DELAY=0
| |
| − | STP=off
| |
| − | NETMASK=255.255.255.0
| |
| − | IPADDR=10.97.210.107
| |
| − | PEERDNS=yes
| |
| − | check_link_down() { return 1 ; }
| |
| − | ==== ifcfg-xenbr158 ====
| |
| − | DEVICE=xenbr158
| |
| − | ONBOOT=yes
| |
| − | TYPE=Bridge
| |
| − | DELAY=0
| |
| − | STP=off
| |
| − | NETMASK=255.255.255.0
| |
| − | IPADDR=10.97.8.107
| |
| − | PEERDNS=yes
| |
| − | check_link_down() { return 1 ; }
| |
| − |
| |
| − |
| |
| − | ===== Cluster LVM =====
| |
| − | # cd /etc/yum.r*
| |
| − | # wget http://ftp.halifax.rwth-aachen.de/centos/4/csgfs/CentOS-csgfs.repo
| |
| − | # yum install lvm2-cluster
| |
| − |
| |
| − | == Debian / Xen3 ==
| |
| − | === Debian 4.0 / Xen3 - xen-linux-system-2.6.18-4-xen-amd64 ===
| |
| − | '''Post Installation basic package:'''
| |
| − | apt-get install ssh xen-linux-system-2.6.18-4-xen-amd64 ntp ntp-server bridge-utils less
| |
| − |
| |
| − | ''' Needed XEN Scripts:'''
| |
| − |
| |
| − | ''' /etc/xen/xend-config.sxp '''
| |
| − | (logfile /var/log/xen/xend.log)
| |
| − | (loglevel DEBUG)
| |
| − | (network-script network-fzk.xen3)
| |
| − | (dom0-min-mem 196)
| |
| − | (dom0-cpus 0)
| |
| − |
| |
| − | ''' /etc/xen/scripts/network-fzk.xen3'''
| |
| − | #!/bin/sh
| |
| − | dir=$(dirname "$0")
| |
| − | echo "====== $dir ======"
| |
| − | "$dir/network-bridge" start vifnum=0 netdev=eth0
| |
| − | "$dir/network-bridge" start vifnum=1 netdev=eth1
| |
| − | echo "=== Bridges configured === "
| |
| − |
| |
| − | '''Note''': The last line is to make sure to have an CR after netdev=eth1,
| |
| − | otherwise this line will not be executed
| |
| − |
| |
| − |
| |
| − | ==== Configure 2 Bridges, but only internal nic has an IP ====
| |
| − |
| |
| − | '''/etc/network/interfaces'''
| |
| − | auto lo
| |
| − | iface lo inet loopback
| |
| − |
| |
| − | allow-hotplug eth0 eth1
| |
| − |
| |
| − | iface eth1 inet manual
| |
| − |
| |
| − | iface eth0 inet static
| |
| − | address 10.97.4.150
| |
| − | netmask 255.255.255.0
| |
| − | network 10.97.4.0
| |
| − | gateway 10.97.4.1
| |
| − | broadcast 10.97.4.255
| |
| − | # dns-* options are implemented by the resolvconf package, if installed
| |
| − | dns-nameservers 10.97.1.191 141.52.8.18
| |
| − | dns-search gridka.de fzk.de
| |
| − | post-up route add -net 10.0.0.0/9 gw 10.97.4.1
| |
| − |
| |
| − | === ''' OUTDATED''' Debian sarge amd64 / xen-3 nstallation ===
| |
| − |
| |
| − | ''' /etc/apt/sources.list'''
| |
| − | # Debian sources
| |
| − |
| |
| − | deb http://amd64.debian.net/debian-amd64 sarge main contrib non-free
| |
| − | deb http://security.debian.org sarge/updates main contrib non-free
| |
| − | deb http://www.backports.org/debian sarge-backports main
| |
| − |
| |
| − | deb-src http://amd64.debian.net/debian-amd64 sarge main contrib non-free
| |
| − | deb-src http://www.backports.org/debian sarge-backports main
| |
| − |
| |
| − | deb http://ftp.uni-stuttgart.de/debian testing main
| |
| − | deb http://ftp.uni-stuttgart.de/debian unstable main
| |
| − |
| |
| − | deb http://packages.debianbase.de/sarge/amd64/xen3/ ./
| |
| − | deb-src http://packages.debianbase.de/sources/xen3 ./
| |
| − |
| |
| − |
| |
| − |
| |
| − | ''' /etc/apt/preferences'''
| |
| − |
| |
| − | Package: *
| |
| − | Pin: release o=Debian,a=stable,l=Debian-Security
| |
| − | Pin-Priority: 950
| |
| − |
| |
| − | Package: *
| |
| − | Pin: release o=Debian,a=stable
| |
| − | Pin-Priority: 900
| |
| − |
| |
| − | Package: *
| |
| − | Pin: release o=Backports.org archive,a=sarge-backports
| |
| − | Pin-Priority: 800
| |
| − |
| |
| − | Package: *
| |
| − | Pin: release o=Debian,a=testing
| |
| − | Pin-Priority: 700
| |
| − |
| |
| − | Package: *
| |
| − | Pin: release o=Debian,a=unstable
| |
| − | Pin-Priority: 600
| |
| − |
| |
| − | Package: *
| |
| − | Pin: origin ""
| |
| − | Pin-Priority: 400
| |
| − |
| |
| − | ''' /boot/grub/menu.lst'''
| |
| − | title Xen 3.0.3-1-amd64 / Debian GNU/Linux, kernel 2.6.18-2-xen-amd64
| |
| − | root (hd0,0)
| |
| − | kernel /boot/xen-3.0.3-1-amd64.gz
| |
| − | module /boot/vmlinuz-2.6.18-2-xen-amd64 root=/dev/sda1 ro console=tty0 console=tty0 max_loop=64
| |
| − | module /boot/initrd.img-2.6.18-2-xen-amd64
| |
| − | savedefault
| |
| − |
| |
| − |
| |
| − | ==== Install xen ====
| |
| − |
| |
| − | apt-cache search xen-linux-system-2.6
| |
| − |
| |
| − | apt-get install xen-linux-system-2.6.18-2-xen-amd64
| |
| − | apt-get install bridge-utils
| |
| − |
| |
| − | ===== Make sure to have brctl installed =====
| |
| − | apt-get install bridge-utils
| |
| − | /etc/init.d/xend resart
| |
| − |
| |
| − | ifconfig should show the bridges xenbr0/1
| |
| − |
| |
| − | ==== Scripts for dual homed network ====
| |
| − |
| |
| − | /etc/xen/scripts/network-fzk.xen3
| |
| − | #!/bin/sh
| |
| − | dir=$(dirname "$0")
| |
| − | echo "====== $dir ======"
| |
| − | "$dir/network-bridge" start vifnum=0 netdev=eth0
| |
| − | "$dir/network-bridge" start vifnum=1 netdev=eth1
| |
| − |
| |
| − | '''patch /etc/xen/xend-config.sxp '''
| |
| − | --- /etc/xen/xend-config.sxp.orig :58:47.000000000 +0100
| |
| − | +++ /etc/xen/xend-config.sxp :11:42.000000000 +0100
| |
| − | @@ -11,8 +11,8 @@
| |
| − | # Commented out entries show the default for that entry, unless otherwise
| |
| − | # specified.
| |
| − |
| |
| − | -#(logfile /var/log/xen/xend.log)
| |
| − | -#(loglevel DEBUG)
| |
| − | +(logfile /var/log/xen/xend.log)
| |
| − | +(loglevel DEBUG)
| |
| − |
| |
| − | #(xend-http-server no)
| |
| − | #(xend-unix-server no)
| |
| − | @@ -84,8 +84,8 @@
| |
| − | # two fake interfaces per guest domain. To do things like this, write
| |
| − | # yourself a wrapper script, and call network-bridge from it, as appropriate.
| |
| − | #
| |
| − | -(network-script network-dummy)
| |
| − | -
| |
| − | +#(network-script network-dummy)
| |
| − | +(network-script network-fzk.xen3)
| |
| − | # The script used to control virtual interfaces. This can be overridden on a
| |
| − | # per-vif basis when creating a domain or a configuring a new vif. The
| |
| − | # vif-bridge script is designed for use with the network-bridge script, or
| |
| − | @@ -99,7 +99,7 @@
| |
| − | # If you are using only one bridge, the vif-bridge script will discover that,
| |
| − | # so there is no need to specify it explicitly.
| |
| − | #
| |
| − | -(vif-script vif-bridge)
| |
| − | +#(vif-script vif-bridge)
| |
| − |
| |
| − |
| |
| − | ## Use the following if network traffic is routed, as an alternative to the
| |
| − |
| |
| − | === Creating an SL4-Image ===
| |
| − | * Install SL4 somewhere, use minimal setup
| |
| − | * create exclude.list (/proc, /sys, /rootfs, /..
| |
| − | * tar cvfpz /
| |
| − |
| |
| − | === On xen3 dom_0 ===
| |
| − | a01-004-151:~# lvcreate -L1G -nXen_SL4_raw XenVG
| |
| − | Logical volume "Xen_SL4_raw" created
| |
| − | a01-004-151:~# lvcreate -L1G -nXen_SL4_Dirs XenVG
| |
| − | Logical volume "Xen_SL4_Dirs" created
| |
| − | a01-004-151:~# lvcreate -L1G -nXen_SL4_swap XenVG
| |
| − | Logical volume "Xen_SL4_swap" created
| |
| − | a01-004-151:~# mkswap /dev/XenVG/Xen_SL4_swap
| |
| − | Setting up swapspace version 1, size = kB
| |
| − | no label, UUID=377313c6-498b-4525-b0d3-f9d9fb2c46bd
| |
| − |
| |
| − |
| |
| − | a01-004-151:~# mkfs.ext3 /dev/XenVG/Xen_SL4_raw
| |
| − |
| |
| − | a01-004-151:~# mkfs.ext3 /dev/XenVG/Xen_SL4_Dirs
| |
| − |
| |
| − | === Create Image ===
| |
| − |
| |
| − | ==== SL3 image ====
| |
| − |
| |
| − | # module_init_tools
| |
| − | #
| |
| − |
| |
| − | ==== SL4 image ====
| |
| − |
| |
| − | out of the box ?
| |
| − |
| |
| − | == Debian/Xen2 - outdated ==
| |
| − | === OS-Installation ===
| |
| − | ==== Ganglia on debian ====
| |
| − | To install and configure ganglia on the dom0 do:
| |
| − | * apt-get install ganglia-monitor
| |
| − | * scp ce-fzk:/opt/glite/yaim/rpms/gmond.conf /etc/
| |
| − | * /etc/init.d/ganglia-monitor restart
| |
| − | ==== New xen-Kernels ====
| |
| − | To compile new dom-U kernels, cd to xen/linux-*-xenU and do
| |
| − | make menuconfig ....choose your options
| |
| − | make ARCH=xen dep bzImage modules modules_install
| |
| − | ==== Debian -- XEN ====
| |
| − | *Boot from Debian 3.1r1 CD
| |
| − | *Configure first network interface with the external IP (nameserver e.g. 141.52.8.18)
| |
| − | *Partitioning: Whole disc in 2 partitions (50 GB / ; rest /srv (for using lvm see below)
| |
| − | *Installation Type: Manual selection
| |
| − | *additional packages: run script install_packages.sh
| |
| − |
| |
| − | As the debian default installation is quite small addidional packages are needed, the following script should get them:
| |
| − | #!/bin/bash
| |
| − | apt-get install -y make
| |
| − | apt-get install -y gcc
| |
| − | apt-get install -y subversion
| |
| − | apt-get install -y bridge-utils
| |
| − | apt-get install -y curl
| |
| − | apt-get install -y libcurl3-dev
| |
| − | apt-get install -y zlib1g-dev
| |
| − | apt-get install -y zlib1g
| |
| − | apt-get install -y python-dev
| |
| − | apt-get install -y python-twisted
| |
| − | apt-get install -y bzip2
| |
| − | apt-get install -y linuxdoc-tools-latex
| |
| − | apt-get install -y gs-common
| |
| − | apt-get install -y transfig
| |
| − | apt-get install -y host
| |
| − | apt-get install -y iptables-dev
| |
| − | apt-get install -y ntpdate
| |
| − | apt-get install -y module-init-tools
| |
| − | apt-get install -y iproute
| |
| − | apt-get install -y lvm2
| |
| − | apt-get install -y dmsetup
| |
| − | mkdir /opt/xen
| |
| − | cd /opt/xen
| |
| − | wget http://www.cl.cam.ac.uk/Research/SRG/netos/xen/downloads/xen-2.0.7-src.tgz
| |
| − | tar xvfz xen-2.0.7-src.tgz
| |
| − | cd xen-2.0
| |
| − | exit
| |
| − |
| |
| − | Untill I find some time or somebody else puts the following in a sed line do: edit Makefile, change the line: Kernels ?= ... so that the 2.4 Kernels are also build, i.e.
| |
| − | KERNELS ?= linux-2.6-xen0 linux-2.6-xenU linux-2.4-xen0 linux-2.4-xenU
| |
| − |
| |
| − | Then build the xen-kernels:
| |
| − |
| |
| − | make world
| |
| − | make install
| |
| − |
| |
| − | ===== Setup /boot/grub/menu.lst =====
| |
| − | Configure this file to boot the xen kernel and to set the max_loop Device parameter.
| |
| − | Change below the line
| |
| − |
| |
| − | '''## ## End Default Options ##'''
| |
| − |
| |
| − | Example:
| |
| − | #### XEN ####
| |
| − | title Xen 2.0 / XenLinux 2.6
| |
| − | root (hd0,0)
| |
| − | kernel /boot/xen-2.0.gz dom0_mem=64000 console=vga
| |
| − | module /boot/vmlinuz-2.6-xen0 root=/dev/sda1 ro console=tty0 max_loop=64
| |
| − | boot
| |
| − |
| |
| − | ===== Configure Network =====
| |
| − | The network is centraly configured in '''/etc/network/interfaces '''.
| |
| − | # This file describes the network interfaces available on your system
| |
| − | # and how to activate them. For more information, see interfaces(5).
| |
| − |
| |
| − | # The loopback network interface
| |
| − | auto lo
| |
| − | iface lo inet loopback
| |
| − |
| |
| − | # The primary network interface
| |
| − | auto eth0
| |
| − | iface eth0 inet static
| |
| − | address 192.108.45.66
| |
| − | netmask 255.255.255.0
| |
| − | network 192.108.45.0
| |
| − | broadcast 192.108.45.255
| |
| − | gateway 192.108.45.1
| |
| − | # dns-* options are implemented by the resolvconf package, if installed
| |
| − | dns-nameservers 10.97.1.191 141.52.8.18
| |
| − |
| |
| − | ====== Configure secound nic ======
| |
| − |
| |
| − | ''' edit /etc/network/interfaces '''
| |
| − | * add eth1 in the line '''auto eth0'''
| |
| − | * add a secound interface block like:
| |
| − | iface eth1 inet static
| |
| − | address 10.97.4.130
| |
| − | netmask 255.255.255.0
| |
| − | network 10.97.4.0
| |
| − | broadcast 10.97.4.255
| |
| − | #gateway 10.97.4.1
| |
| − | # dns-* options are implemented by the resolvconf package, if installed
| |
| − | dns-nameservers 10.97.1.191 141.52.8.18
| |
| − | dns-search gridka.de fzk.de
| |
| − | ====== Add a route ======
| |
| − |
| |
| − | append to the interfaces file a line like:
| |
| − | post-up route add -net 10.0.0.0/9 gw 10.97.4.1
| |
| − |
| |
| − | to add a route
| |
| − |
| |
| − | ===== Make sure to have enough loop devices =====
| |
| − | for minor in `seq 8 1 63` ; do mknod /dev/loop$minor b 7 $minor ; done
| |
| − | ===== LVM Logical Volume Manager ==== =
| |
| − | Make sure that lvm2 and dmsetup are installed.
| |
| − |
| |
| − | Create physical volume:
| |
| − | *pvcreate /dev/sdb1
| |
| − | here we use the sec har disc with one partition, any other setup is possible.
| |
| − | All partitions can be used for a physical volume, from these a Volume Group is created
| |
| − | *vgcreate XenVG /dev/sdb1 /dev/<and all other pv created before>
| |
| − | In this VolumeGroup create the logical volumes to be used in the images, for example
| |
| − | *lvcreate -L20G -nXen_g_CE_home XenVG
| |
| − | To get a list of available logical volumes:
| |
| − | *lvscan -v
| |
| − |
| |
| − | '''Note''' Take care to set the permissions of the lv apropriatly in the virtual servers, e.g. chmod 1777 /tmp for imported tmp directories in the virtual servers.
| |
| − |
| |
| − | ====== Images in lvm ======
| |
| − |
| |
| − | Create a suitable lvm volume with ext3 fs:
| |
| − | lvcreate -L4GB -n Xen_SE_DC_Sys XenVG
| |
| − | mkfs.ext3 /dev/XenVG/Xen_SE_DC_Sys
| |
| − |
| |
| − | ===== XEN POSTINSTALLATION STEPS -- CONFIGURATION of automatic domain start=====
| |
| − | ====== The files which are needed to start the images (xm create <image-start-file>) should be available through nfs.======
| |
| − | This procedure is slightly different from default configuration, as we want to have multiple nics configured in the virtual servers.
| |
| − | Procedure on client:
| |
| − | * ''' NFS''':
| |
| − | add to /etc/fstab
| |
| − | a01-004-155:/nfs/etc_xen /etc/xen_nfs nfs ro 0 0
| |
| − |
| |
| − | '''command:''' mount -a
| |
| − |
| |
| − | * Create xen-autostart structure
| |
| − | * mv /etc/xen /etc/xen.local
| |
| − | * mkdir -p /etc/xen/auto
| |
| − | * mkdir /etc/xen_nfs
| |
| − | * ln -s /etc/xen_nfs/scripts /etc/xen/scripts
| |
| − | * ln -s /etc/xen_nfs/auto /etc/xen/auto/<IMAGES TO START ON HOST>
| |
| − | * ln -s /etc/xen_nfs/xend-config.sxp /etc/xen/xend-config.sxp
| |
| − | * ln -s /etc/init.d/xendomains /etc/rc2.d/S91xendomains
| |
| − | * ln -s /etc/init.d/xend /etc/rc2.d/S90xend
| |
| − | ====== Timeservers ======
| |
| − | Virtual servers are using the time of the xen host, make sure that ntpdate is running and is configured coeectly, i.e. use 10.97.4.200 in /etc/default/ntpdate.
| |
| − | ''' Make sure that the time is upated in a cron job:'''
| |
| − | crontab -e
| |
| − | 58 */6 * * * /usr/sbin/ntpdate 10.97.4.200 > /tmp/zeit.log
| |
| − | /etc/init.d/cron restart
| |
| − |
| |
| − | ====== Activating Second Network Interface ======
| |
| − | To activate the second network interface the following procedure was applied:
| |
| − | http://wiki.xensource.com/xenwiki/XenNetworking
| |
| − |
| |
| − | ''if you want to use multiple bridges, you must create them yourself, either manually, or via your own startup script,
| |
| − | or via a custom script to replace network-bridge. For example:
| |
| − | The second network interface is started in dom_0 with the script /root/xen-net-init:''
| |
| − |
| |
| − |
| |
| − | #!/bin/bash
| |
| − | # A.G.
| |
| − | if [ $# != 3 ] ; then
| |
| − | echo -e "Usage: $0 <DOMAIN-NUMBER> <Internal IP> <External IP>\n"
| |
| − | exit 1
| |
| − | fi
| |
| − | XEN_S=/etc/xen/scripts
| |
| − | D=$1
| |
| − | # Test if the domain number given really exists
| |
| − | xm list | tail -n +2 | awk '{print $2}' | grep -q $D
| |
| − | if [ $? == 1 ] ; then
| |
| − | echo -e "Domain $D does not exist! Please provide a DOMAIN-NUMBER\n"
| |
| − | exit 2
| |
| − | fi
| |
| − | $XEN_S/network start bridge=xen-br0 netdev=eth0 antispoof=no
| |
| − | $XEN_S/network start bridge=xen-br1 netdev=eth1 antispoof=no
| |
| − | $XEN_S/vif-bridge up domain=${D} vif=vif${D}.0 bridge=xen-br0 mac="FE:FF:FF:FF:FF:FF" ip="$2"
| |
| − | $XEN_S/vif-bridge up domain=${D} vif=vif${D}.1 bridge=xen-br1 mac="FE:FF:FF:FF:FF:FF" ip="$3"
| |
| − |
| |
| − | ====== Xen Dom_U Start Configuration Files for the Virtual Maschines ======
| |
| − | Create in /etc/xen/auto/ the configuration files for each virtual maschine to run on the host. The auto directory will be evaluated at dom_0 boot time.
| |
| − | Example /etc/xen/auto/pps-bdii-fzk:
| |
| − |
| |
| − | # -*- mode: python; -*-
| |
| − |
| |
| − | name = "pps-bdii-fzk"
| |
| − | vmid = 1
| |
| − |
| |
| − | kernel = "/boot/vmlinuz-2.4.30-xenU"
| |
| − | memory = 256
| |
| − | cpu = 1
| |
| − |
| |
| − | # Number of network interfaces. Default is 1.
| |
| − | nics=2
| |
| − | vif=[ 'mac=00:16:3e:70:%d:01,bridge=br0' % vmid,'mac=00:16:3e:70:%d:02,bridge=br1' % vmid]
| |
| − |
| |
| − | disk = [ 'file:/data/xen-%s,hda1,w' % name,
| |
| − | 'file:/data/swap-%d,hda2,w' % vmid]
| |
| − |
| |
| − | root = "/dev/hda1 ro"
| |
| − |
| |
| − | '''Note:''' To avoid collisions of mac addresses it is better use constructions like:
| |
| − | vif=[ 'mac=00:16:3e:70:Hex1:Hex2,bridge=br0','mac=00:16:3e:70:Hex3:Hex4,bridge=br1']
| |
| − | Where Hex 1-4 are the last 2 tuples of the internal and external IP
| |
| − |
| |
| − | '''Note:''' If you want use lvm partitions from dom_0 you can use:
| |
| − | disk = [ 'file:/data/xen-%s,hda1,w' % name,
| |
| − | 'file:/data/swap-%d,hda2,w' % vmid,
| |
| − | 'phy:/dev/XenVG/XenCE_home,hdb1,w',
| |
| − | 'phy:/dev/XenVG/XenCE_tmp,hdb2,w']
| |
| − |
| |
| − | hdb1/2 is then to included in the fstab file in the virt. maschine, for example:
| |
| − | /dev/hdb1 /home ext3 defaults 1 1
| |
| − | /dev/hdb2 /tmp ext3 defaults 1 1
| |
| − |
| |
| − | '''Note:''' Before /dev/hdb1/2 can be used in the virtual maschine a filesystem has to be created there. Therefore the following can be done:
| |
| − | *comment out /dev/hdb lines in /ets/fstab in the image
| |
| − | *boot the virtual maschine
| |
| − | *xm console to this <ID>
| |
| − | *mkfs.ext3 /dev/hdb1
| |
| − | *mkfs.ext3 /dev/hdb2
| |
| − | *uncomment the lines in /etc/fstab
| |
| − |
| |
| − | ===== Images for the virtual maschines =====
| |
| − | A basic ~2GB image can be optained with:
| |
| − | dd if=/dev/zero of=/<Image-Name> bs=512 count=4000000
| |
| − | mkfs.ext3 <Image-Name>
| |
| − | mount -o loop <Image-file> /mnt
| |
| − | from an existing linux system which is to be virtualized do
| |
| − | cd /;tar <all dirs except nfs mounted files>, proc|ssh <where created image is mounted> "cd /mnt; tar xsp"
| |
| − |
| |
| − | wget http://savannah.fzk.de/websites/fzk/gridkaschool/2005/xen-images/sl-3.0.5.img.ready-to-yaim--reloaded.gz
| |
| − | wget http://savannah.fzk.de/websites/fzk/gridkaschool/2005/xen-images/swap-1.gz
| |
| − | Unzip the image and the swap file, and move them to /data/<Virt-hostname-Name>.
| |
| − | Virt-Node-Name can be e.g. pps-bdii-fzk. For each Virtual host one image and swap file has to be created with the name used in the /etc/xen/auto/<start-config-file>.
| |
| − | Before this image can be used several changes in network configuration files have to be done, Therefore loop mount the image and adapt the files
| |
| − |
| |
| − | ====== Changing the network configurationof the images ======
| |
| − | To manipulate files within the image it has to be mounted:
| |
| − |
| |
| − | mount -o loop /<PATH_TO>/<IMAGE_NAME> /tmp
| |
| − |
| |
| − | adapt the following files:
| |
| − | */etc/ssh/ssh* to use Port 24
| |
| − | * /etc/apt/apt.conf Default a proxy is used if not needed change apt.conf to:
| |
| − | // User customizable configuration
| |
| − |
| |
| − | RPM
| |
| − | {
| |
| − | // Uncomment to disable GPG-signature checking for packages
| |
| − | // GPG-Check "false";
| |
| − | };
| |
| − |
| |
| − | // Options for the downloading routines
| |
| − | Acquire
| |
| − | {
| |
| − | // Retries "1";
| |
| − | // http::Proxy "http://user:password@proxy-server.domain.tld:port/";
| |
| − | //http::Proxy "http://proxy.fzk.de:8000/";
| |
| − | //ftp::Proxy "http://proxy.fzk.de:8000/";
| |
| − | };
| |
| − |
| |
| − | */etc/fstab remove the nfs line gks..., otherwise the booting will take till the nfs mount timeouts, i.e. ages, I'll create a new image soon.
| |
| − | */etc/sysconfig/network-scripts/route-eth0/1: set the default route of the internal networ
| |
| − | */etc/sysconfig/network-scripts/ifcfg-eth0/1}
| |
| − |
| |
| − | Configure the network interfaces according to which bridge it is bound.
| |
| − | In the examples below it is assumed that the virtual hosts are running in the admin rack 4
| |
| − | *ifcfg-eth0:
| |
| − | DEVICE=eth0
| |
| − | BOOTPROTO=static
| |
| − | ONBOOT=yes
| |
| − | IPADDR=192.108.45.XYZ
| |
| − | NETMASK=255.255.255.0
| |
| − | GATEWAY=192.108.45.1
| |
| − | TYPE=Ethernet
| |
| − | *ifcfg-eth1:
| |
| − | DEVICE=eth1
| |
| − | BOOTPROTO=static
| |
| − | ONBOOT=yes
| |
| − | IPADDR=10.97.4.ABC
| |
| − | NETMASK=255.255.255.0
| |
| − | TYPE=Ethernet
| |
| − |
| |
| − | ===== Resizing of a image =====
| |
| − | To increase an Image one can use.
| |
| − | dd if=/dev/zero bs=512 count=20000000 >> <IMAGE>
| |
| − |
| |
| − | This will add 10 GB to the image
| |
| − |
| |
| − | Next the filesystem has to be checked:
| |
| − | e2fsck -f xen-pps-ce-fzk_torque_14G
| |
| − | and resized
| |
| − | resize2fs xen-pps-ce-fzk_torque_14G
| |
| − |
| |
| − | ===== [[Converting a physical server in a virtual]] =====
| |
| − | *create image file
| |
| − | *on server: cd /; tar csp <all without home, tmp, nfs-dirs> | ssh virt. server:/virt-server-image-file "cat - tar xsp"
| |
| − | * set values in the network config files (eth0/1, fstab, ..) in the virt. server accordingly
| |
| − |
| |
| − | ==== Starting the Virtual Maschines ====
| |
| − | For the first time the following steps have to performed manualy, they can be included in the boot procedure.
| |
| − |
| |
| − | The following commands have to be executed:
| |
| − | /etc/init.d/xend start
| |
| − | xm create /etc/xen/auto/<Virt. Maschine Name> to be started
| |
| − | /root/xen-net-init <ID> <IP 1> <IP 2>
| |
| − |
| |
| − | The <ID> can be evaluated with '''xm list'''. IP 1 and IP 2 have to set according to where eth0 and eth1 are bound to (internal 10.X.X.X, or external 192.X.X.X network)
| |
| − |
| |
| − | Now the virtual maschine should be ssh-accessable from your desktop, if not you can login to the dom_0 host and start a virtual-host-console there with: '''xm create <ID>'''. Now correct the network configuration of the virtual host.
| |
| − |
| |
| − | ===== Configuration of the virtual hosts =====
| |
| − | ====== Network configuration ======
| |
| − | ====== Updating the base OS ======
| |
| − | To update the base OS (Scientific Linux Cern 3.0.X) to the actual version do:
| |
| − | *check proxy settings (see above)
| |
| − | *check /etc/hosts for not needed entries
| |
| − | *check the repository settings in /etc/apt/sources.list
| |
| − | *apt-get update
| |
| − | *apt-get upgrade
| |
| − |
| |
| − |
| |
| − |
| |
| − | ==== Problems ====
| |
| − | ===== On nfs Client: =====
| |
| − | [root@bdii-fzk root]# mount -a
| |
| − |
| |
| − | gives:
| |
| − | mount: RPC: Program not registered
| |
| − |
| |
| − | ''' Is the nfsserver running correctly''', is the nfsd module loaded (modprobe nfsd), possible problem: wrong modules, have to be the same as the kernel was compiled for. Can hapen when you just cp the kernels.
| |
| − |
| |
| − | Is the nfs mount line in /etc/fstab correct?
| |
| − |
| |
| − | ===== xm create doesnt work =====
| |
| − | check if module-init-tools is installed
| |
| − |
| |
| − | ===== network bridges cant be created =====
| |
| − | Network package iproute not installed, causes that the start of the xend creates a not usable routing table, i.e. route cannot be setup through bridge, just do apt-get install iproute.
| |
| − |
| |
| − | ===== Virtual server with lvm in fstab doesnt start =====
| |
| − | at first boot/mount of the lvm devices a filesystem has to be created on the mounted devices,
| |
| − | starting a console gives:
| |
| − | xm console <ID>
| |
| − | Checking all file systems.
| |
| − | [/sbin/fsck.ext3 (1) -- /home] fsck.ext3 -a /dev/hdb1
| |
| − | [/sbin/fsck.ext3 (1) -- /tmp] fsck.ext3 -a /dev/hdb2
| |
| − | fsck.ext3: Bad magic number in super-block while trying to open /dev/hdb2
| |
| − | [FAILED]
| |
| − |
| |
| − | *** An error occurred during the file system check.
| |
| − | *** Dropping you to a shell; the system will reboot
| |
| − | *** when you leave the shell.
| |
| − | Give root password for maintenance
| |
| − |
| |
| − |
| |
| − | This can happen if you have in the xm create start file you have something like:
| |
| − |
| |
| − | 'phy:/dev/XenVG/Xen_l_CE_home,hdb1,w',
| |
| − |
| |
| − | in the fstab of the virtual maschine you have something like
| |
| − | /dev/hdb1 /home
| |
| − |
| |
| − | then give root passwort and create the filesystems with e.g.
| |
| − | mkfs.ext3 /dev/hdb1
| |
| − |
| |
| − | ===== MySQL =====
| |
| − |
| |
| − | Aus meinen Notizen, ohne weitere Formatierung.
| |
| − |
| |
| − | Passwort fuer einen Benutzer einer Datenbank aendern:
| |
| − | 1) als root einloggen:
| |
| − | mysql -h localhost -u root -p
| |
| − |
| |
| − | 2) setzen des Passworts fuer den Benutzer ->accounting<- auf das Passwort
| |
| − | ->accountingspw<-:
| |
| − |
| |
| − | mysql> set password for accounting@localhost=Password('accountingspw');
| |
| − |
| |
| − |
| |
| − | USE mysql
| |
| − | GRANT SELECT, INSERT, UPDATE, DELETE ON accounting.* TO 'accounting'
| |
| − | IDENTIFIED BY 'accounting';
| |
| − | DELETE FROM user WHERE user LIKE 'accounting';
| |
| − | DELETE FROM db WHERE user LIKE 'accounting';
| |
| − | INSERT INTO user (host,user,password,create_priv,drop_priv) VALUES
| |
| − | ('localhost','accounting',password('accounting'),'Y','Y');
| |
| − | INSERT INTO user (host,user,password,create_priv,drop_priv) VALUES
| |
| − | ('127.0.0.1','accounting',password('accounting'),'Y','Y');
| |
| − | INSERT INTO user (host,user,password,create_priv,drop_priv) VALUES
| |
| − | ('localhost.localdomain','accounting',password('accounting'),'Y','Y');
| |
| − | INSERT INTO user (host,user,password,create_priv,drop_priv) VALUES
| |
| − | ('a01-004-123.gridka.de','accounting',password('accounting'),'Y','Y');
| |
| − | INSERT INTO user (host,user,password,create_priv, drop_priv) VALUES
| |
| − | ('lcg-gridka-ce','accounting',password('accounting'),'Y','Y');
| |
| − | INSERT INTO db
| |
| − | (host,db,user,select_priv,insert_priv,update_priv,delete_priv,create_priv,
| |
| − | alter_priv) VALUES ('%','accounting','accounting','Y','Y','Y','Y','Y','Y');
| |
| − | FLUSH PRIVILEGES;
| |
| − | DROP DATABASE IF EXISTS accounting;
| |
| − | CREATE DATABASE accounting;
| |
| − | USE accounting;
| |
| − |
| |
| − | ========== Um von meinem Rechner darauf zu arbeiten ===========
| |
| − | [root@lcg-gridka-ce yaim]# mysql -h localhost -u root -p
| |
| − | Enter password:
| |
| − | Welcome to the MySQL monitor. Commands end with ; or \g.
| |
| − | Your MySQL connection id is 4 to server version: 4.0.25-standard
| |
| − |
| |
| − | Type 'help;' or '\h' for help. Type '\c' to clear the buffer.
| |
| − |
| |
| − | mysql> USE mysql
| |
| − | Reading table information for completion of table and column names
| |
| − | You can turn off this feature to get a quicker startup with -A
| |
| − |
| |
| − | Database changed
| |
| − | mysql> INSERT INTO user (host,user,password,create_priv, drop_priv) VALUES
| |
| − | -> ('iwrgabriel.ka.fzk.de','accounting',password('accounting'),'Y','Y');
| |
| − | Query OK, 1 row affected (0.10 sec)
| |
| − |
| |
| − | mysql> FLUSH PRIVILEGES;
| |
| − | Query OK, 0 rows affected (0.02 sec)
| |
| − |
| |
| − | mysql> quit
| |
| − | Bye
| |
Docu on CentOS
Some links:
see Virtualization
check PCI-DMA: Out of SW-IOMMU space ERROR
CentOS 5
These are just notes taken during the installation, it is not meant as a howto or something like that
Hardware Dell 1950
CentOS 5 X86_64, Minimal system
Additional Packages
Minimal System installed via kickstart, packages:
# Packages groups/list
%packages --resolvedeps --ignoremissing
openssh
openssh-server
wget
perl-libnet
perl-MIME-Base64
perl-URI
perl-Digest-MD5
perl-libwww-perl
perl-XML-Parser
perl-DBI
perl-Crypt-SSLeay
lsof
Post Install, get the following packages
Some of these are not needed, has to be cleaned:
yum install \
gcc make zlib-devel zlib python-devel curses libncurses-devel ncurses-devel openssl openssl-devel \
`yum search xorg-x11|grep dev|grep x86_64|awk -F . '{print $1}'` \
bridge-utils tetex tetex-latex transfig libtool-ltdl dev86 glibc-devel
xen 3.1.2-rc from mercurial
hg pull ...
cd xen-3.1
wget http://www.broadcom.com/docs/driver_download/NXII/linux-1.5.10c.zip
unzip, use broadcom sources for
make world
make install
depmod 2.6.18-xen
mkinitrd -v -f --with=aacraid --with=sd_mod --with=scsi_mod --with=megaraid_sas /boot/initrd-2.6.18-xen.img 2.6.18-xen
Note on: Network Problems
Broadcom drivers have problems, network is OK when xend started without network bridges, see /etc/xen/xend-config.sxp
Starting bridge with: /etc/xen/scripts/network-bridge start
results in a not working network configuration in dom0.
see network-bridge causes network to hang
swiotlb=128 has to be set in menu.list since we have 8GB RAM, without youll get error messages like :
Sep 7 13:14:22 test-11 kernel: PCI-DMA: Out of SW-IOMMU space for 65536 bytes at device 0000:02:01.0
see also: SW-IOMMU space
- change/add /boot/grub/menu.list:
title CentOS (xen-3.1.2-rc2 2.6.18 compiled)
root (hd0,0)
kernel /xen-3.1.gz
module /vmlinuz-2.6-xen ro root=/dev/md1 swiotlb=128
module /initrd-2.6.18-xen.img
Boot into your new system:
[root@kribbe ~]# xm dmesg
__ __ _____ _ ____ ____
\ \/ /___ _ __ |___ / / | |___ \ _ __ ___|___ \
\ // _ \ '_ \ |_ \ | | __) |__| '__/ __| __) |
/ \ __/ | | | ___) || |_ / __/|__| | | (__ / __/
/_/\_\___|_| |_| |____(_)_(_)_____| |_| \___|_____|
http://www.cl.cam.ac.uk/netos/xen
University of Cambridge Computer Laboratory
Xen version 3.1.2-rc2 (root@nikhef.nl) (gcc version 4.1.1 20070105 (Red Hat 4.1.1-52)) Tue Nov 13 15:02:14 CET 2007
Latest ChangeSet: unavailable
.
.
.
(XEN) HVM: VMX enabled
(XEN) VMX: MSR intercept bitmap enabled
(XEN) CPU0: Intel(R) Xeon(R) CPU 5150 @ 2.66GHz stepping 06
.
.
.
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
Example: lvm for a CentOS5 test VM
Root FS, only one partition
[root@kribbe tmp]# lvcreate -L10G -nXen_CentOS5_Test XenVG
Logical volume "Xen_CentOS5_Test" created
root@kribbe tmp]# mkfs.ext3 /dev/XenVG/Xen_CentOS5_Test
mke2fs 1.39 (29-May-2006)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
1310720 inodes, 2621440 blocks
131072 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=2684354560
80 block groups
32768 blocks per group, 32768 fragments per group
16384 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 28 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
SWAP
[root@kribbe tmp]# lvcreate -L1G -nXen_CentOS5_Test_swap XenVG
Logical volume "Xen_CentOS5_Test_swap" created
[root@kribbe tmp]# mkswap /dev/XenVG/Xen_CentOS5_Test_swap
Setting up swapspace version 1, size = 1073737 kB
Virtualize Physical Nodes
- On DOM_0 Create a lvm for the DOM_U
- Mount this lvm on DOM_0
- On Physical Node change runlevel to s
- setup a exclude-list file, for details see eisxen
- cd /; tar csp --exclude-from=/rootfs/exclude.lst /* |ssh DOM_0 "cd /<mounted LVM>; tar xsp"
- change the fstab of the dom_u
Example exclude.lst, node specific, dont just copy, see also: eisxen
This list must not have an empty line at the end.
less /rootfs/exclude.lst
/boot
/data
/datastore
/datastore2
/proc
/rootfs
/etc/mtab
DOM_U is a centos-3.x
In order to run this as a virtual maschine, the dom_u might need a new version of e2fschk and module-init-tools.
Therfore, on DOM_0 mount the DOM_U fs created in an earlier step, get e2fsprogs-1.39.tar.gz module-init-tools-3.2.tar.gz (these versions worked for us) to this directory.
The following commands worked for me.
- chroot to dom_u mountpoint
- extract, compile, install e2fschk and module-init-tools
- cp -r DOM_0:/lib/modules/<running version> DOM_U:/lib/modules
- for e2fs do: tar xvfz e2fsprogs-1.39.tar.gz ;cd e2fsprogs-1.39; ./configure; make; make install
- for modutils: tar xvfz module-init-tools-3.2.tar.gz; cd module-init-tools-3.2; ./configure --prefix=/ ;make moveold; make; make install
CentOS 5 with Virtualization package
2.6.18-8.el5xen #1 SMP Thu Mar 15 19:56:43 EDT 2007 x86_64 x86_64 x86_64 GNU/Linux
2.6.18-8.1.15.el5xen #1 SMP Mon Oct 22 09:01:12 EDT 2007 x86_64 x86_64 x86_64 GNU/Linux
[root@kribbe ~]# xm dmesg
__ __ _____ ___ _____ ____ _ ____
\ \/ /___ _ __ |___ / / _ \ |___ / _ __ ___| ___| ___| | ___|
\ // _ \ '_ \ |_ \| | | | |_ \ __| '__/ __|___ \ / _ \ |___ \
/ \ __/ | | | ___) | |_| | ___) |__| | | (__ ___) | __/ |___) |
/_/\_\___|_| |_| |____(_)___(_)____/ |_| \___|____(_)___|_|____/
http://www.cl.cam.ac.uk/netos/xen
University of Cambridge Computer Laboratory
Xen version 3.0.3-rc5-8.1.15.el5 (mockbuild@) (gcc version 4.1.1 20070105 (Red Hat 4.1.1-52)) Mon Oct 22 08:25:42 EDT 2007
Latest ChangeSet: unavailable
....
(XEN) VMXON is done
(XEN) Dom0 has maximum 4 VCPUs
Installed Packages:
Name : lvm2
Arch : x86_64
Version: 2.02.16
Name : bridge-utils
Arch : x86_64
Version: 1.1
- use partition /dev/md3 mounted on /project for lvm
comment out ..... /project
umount /project
pvcreate /dev/md3
vgcreate XenVG /dev/md3
lvcreate -L10G -nXen_CentOS5_Test XenVG
mkfs.ext3 /dev/XenVG/Xen_CentOS5_Test
lvcreate -L1G -nXen_CentOS5_Test_swap XenVG
mkswap /dev/XenVG/Xen_CentOS5_Test_swap
Running various centOS Versions as VMs on kribbe
Check if virt-manager tools are working
virt-install can be used for VM installation.
CentOS 5 64-Bit in VM
set up kickstart file for VM, than
virt-install -p --location=http://www.dutchgrid.nl/mirror/centos/5/os/x86_64 --noautoconsole \
--file=/dev/XenVG/Xen_CentOS5_Test --name=domU001 --ram=1024 \
-x "ks=http://stal.nikhef.nl/ks/xen-test-koebrug.ks ip=194.171.97.11 \
netmask=255.255.255.0 dns=192.16.186.253 gateway=194.171.97.254"
Connect to th econsole of the starting vm:
[root@kribbe ~]# xm list
Name ID Mem(MiB) VCPUs State Time(s)
Domain-0 0 7025 4 r----- 1056.7
domU001 8 1023 1 -b---- 490.8
- xm console <ID> or <Name> of the VM (s.a.) creates a console of the VM
Worked
Note: no vnc option in the virt-install command,
- --vnc option removed, does not boot.
- during boot of the VM answer: q: graphics support: no
On VM:
/etc/redhat-release
CentOS release 5 (Final)
[root@koebrug ~]# uname -a
Linux koebrug.nikhef.nl 2.6.18-8.el5xen #1 SMP Thu Mar 15 19:56:43 EDT 2007 x86_64 x86_64 x86_64 GNU/Linux
CentOS 4.5 64-Bit in VM
[root@silo ~]# uname -a
Linux silo.nikhef.nl 2.6.9-55.ELxenU #1 SMP Wed May 2 14:29:26 EDT 2007 x86_64 x86_64 x86_64 GNU/Linux
[root@silo ~]# cat /etc/redhat-release
CentOS release 4.5 (Final)
64 Bit DOM_U in 64 Bit DOM_0 seems to be no problem. 32Bit installations can not be done in this way, apropriate kernel needed Looking at virsh
Using VIRSH
Information on virsh can be found at:
centos-wiki
or
Red Hat Virtualization
virsh is another virtualization management tool (built around the libvirt management API) which is now capable to deal with xen, future versions might also be able to manage kvm or qemu.
Since we plan to use xen we should stick with xm directly.
Virtual Maschine management with xm
based on: Chapter 17. Managing Virtual Machines Using xm
CentOS 5 i386-System -- Quattor generated
Problems
- virt-manager not working centos-bug
- Post-Quattor steps to prevent quattor from revoking installation/configuration operations.
on kribbe:
chkconfig cdp-listend off
chkconfig ncm-cdispd off
on stal:
[root@stal ~]# aii-shellfe --boot kribbe.nikhef.nl
to give back the control to quattor (fresh install next boot, will also switch on cdp-listen and ncm-cdispd)
[root@stal ~]# aii-shellfe --install kribbe.nikhef.nl
- Mount external storage for files that should survive a reboot/installation
mount -tnfs tbn15.nikhef.nl:/export/array2/local/tbadmin /tmpmnt
- 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>
Example installation of a CentOS5 VM
Create a VM in lvm partition
- Setup lvm as stated above
- Mount VM root fs: mount /dev/XenVG/Xen_CentOS5_Test /mnt
- extract archive:
- [root@kribbe tmp]# bunzip2 centos.5-0.20070424.img.tar.bz2
- [root@kribbe tmp]# tar xvf centos.5-0.20070424.img.tar
- loopmount image
- [root@kribbe tmp]# mkdir /img
- [root@kribbe tmp]# mount -o loop centos.5-0.img /img
- cp image to logical volume
- [root@kribbe img]# cp -a * /mnt/
- Change Root PW in VM:
[root@kribbe mnt]# chroot /mnt
bash-3.1# pwconv
bash-3.1# passwd
Changing password for user root.
- Set Hostname of VM: /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=koebrug.nikhef.nl
- no swap in VM: /etc/fstab
#/dev/sda2 none swap sw 0 0
setup of VM start files
SELinux, Postinstallation steps
- Cleaning up daemons, pay attention to ntp, do the dom_U has the correct time?
/sbin/service microcode_ctl stop
/sbin/chkconfig --del microcode_ctl
/sbin/service smartd stop
/sbin/chkconfig --del smartd
/sbin/service ntpd stop
/sbin/chkconfig --del ntpd
If you are using SELinux, it is important to check that the image has the correct security context (xen_image_t), or access to the virtual disk will be denied to the domU system. You can check this with ls:
# ls -Z /srv/xen/mailserver.img
-rw-r--r-- root root user_u:object_r:xen_image_t /srv/xen/mailserver.img
If you are having trouble setting the right file context, please have a look at the Xen tips and tricks page. At any rate, turning off SELinux, as some howtos on this subject advise is a very poor workaround. Reading two manual pages (semanage(8) and restorecon(8)), for an extra layer of security is a good trade!
