1- For VM Host, do basic server install. Following is partial ks file. Nothing interesting here. Just remember to create a Physical Volume to host VMs. It gives better performance compared to flat file system.
part / --fstype=ext4 --onpart=sda1 part swap --onpart=sda2 part pv.008003 --onpart=sda3 repo --name="CentOS" --baseurl=cdrom:sr1 --cost=100 %packages @base @client-mgmt-tools @console-internet @core @debugging @directory-client @hardware-monitoring @java-platform @large-systems @network-file-system-client @performance @perl-runtime @server-platform @server-policy pax oddjob sgpio certmonger pam_krb5 krb5-workstation perl-DBD-SQLite %end
2- Install Extra repo(obviously this can be scripted):
[root@vmhost ~]# rpm -Uvh http://download.fedoraproject.org/pub/epel/6/i386/epel-release-6-5.noarch.rpm # Disable it [root@vmhost yum]# sed -i "s/enabled=1/enabled=0/g" /etc/yum.repos.d/epel.repo # Install puppet [root@vmhost yum]# yum -y install --enablerepo=epel puppet3- Create /mnt/build to host puppet files. This will be NFS exported so that Guests can access puppet file.
4- Create /mnt/build/vmhost-manifest.pp with following config:
class build-host {
# Some preperation
file {'motd':
ensure => file,
path => '/etc/motd',
mode => 0644,
content => "Welcome to ${::fqdn} with IP ${::ipaddress},\nan ${::architecture} ${::operatingsystem} machine part of ${::domain}.\n",
}
# Setting up bridge network
file {'eth0':
ensure => file,
path => '/etc/sysconfig/network-scripts/ifcfg-eth0',
mode => 0644,
content => "DEVICE=\"eth0\"\nNM_CONTROLLED=\"yes\"\nONBOOT=yes\nTYPE=Ethernet\nBRIDGE=\"br0\"\n",
require => File['br0']
}
file {'br0':
ensure => file,
path => '/etc/sysconfig/network-scripts/ifcfg-br0',
mode => 0644,
content => "DEVICE=\"br0\"\nONBOOT=yes\nTYPE=Bridge\nBOOTPROTO=none\nIPADDR=192.168.0.40\nPREFIX=24\nGATEWAY=192.168.0.1\nDNS1=192.168.0.1\nDEFROUTE=yes\nIPV4_FAILURE_FATAL=yes\nIPV6INIT=no\n",
require => Package['bridge-utils']
}
exec {'restart_network' :
command => "/etc/init.d/network restart",
require => File['br0'],
unless => "/sbin/ifconfig | grep virbr",
}
# Adding Volume Group to Physical Volume
$vms = "/dev/sda3"
exec {'volume_group' :
command => "/sbin/vgcreate vms ${vms}",
unless => "/sbin/vgdisplay 2>&1| grep vms",
}
exec {'vm0root' :
command => "/sbin/lvcreate -L 10G -n vm0-root",
unless => "/sbin/lvdisplay 2>&1| grep vm0-root",
}
exec {'vm0swap' :
command => "/sbin/lvcreate -L 4096M -n vm0-swap",
unless => "/sbin/lvdisplay 2>&1| grep vm0-swap",
}
# Disabling SELinux
if $selinux != 'false' {
exec {"disable_selinux_enforcement":
command => "/bin/sed -i s/SELINUX=.*/SELINUX=disabled/g /etc/sysconfig/selinux && /bin/sed -i s/SELINUX=.*/SELINUX=disabled/g /etc/selinux/config", }
notify {"SELinux disabled! Please reboot!" : require => Exec['disable_selinux_enforcement'], }
}
# Setting up NFS export for Guest VMs to access puppet configs
file { '/mnt/build' :
ensure => "directory", }
exec {"export_puppet" :
command => '/bin/echo "/mnt/build 192.168.0.0/24(r)" >> /etc/exports',
unless => '/bin/grep mnt\/build /etc/exports',
require => File['/mnt/build']
}
# Package install
package{'qemu-kvm' : ensure => installed, }
package{'libvirt' : ensure => installed, }
package{'python-virtinst' : ensure => installed, }
package{'bridge-utils' : ensure => installed, }
package{'httpd' : ensure => installed, }
package{'screen' : ensure => installed, }
package{'createrepo' : ensure => installed, }
# Turning on and off service resources
# Turning on used services
service { 'libvirtd': ensure => 'running', enable => 'true', hasstatus => true, }
service { 'avahi-daemon': ensure => 'running', enable => 'true', hasstatus => true, }
service { 'libvirt-guests': ensure => 'running', enable => 'true', hasstatus => true, }
service { 'ntpd': ensure => 'running', enable => 'true', hasstatus => true,}
service { 'ntpdate': ensure => 'running', enable => 'true', hasstatus => true,}
service { 'httpd': ensure => 'running', enable => 'true', hasstatus => true, require => Package['httpd'],}
service { 'rpcbind': ensure => 'running', enable => 'true', hasstatus => true,}
service { 'nfs': ensure => 'running', enable => 'true', hasstatus => true, require => Service['rpcbind'],}
# Turning off un-used services
service { 'abrt-ccpp': ensure => 'stopped', enable => 'false', hasstatus => true,}
service { 'abrt-oops': ensure => 'stopped', enable => 'false', hasstatus => true,}
service { 'abrtd': ensure => 'stopped', enable => 'false', hasstatus => true,}
service { 'atd': ensure => 'stopped', enable => 'false', hasstatus => true, }
service { 'auditd': ensure => 'stopped', enable => 'false', hasstatus => true, }
service { 'autofs': ensure => 'stopped', enable => 'false', hasstatus => true,}
service { 'cups': ensure => 'stopped', enable => 'false', hasstatus => true,}
service { 'ip6tables': ensure => 'stopped', enable => 'false', hasstatus => true,}
service { 'iptables': ensure => 'stopped', enable => 'false', hasstatus => true,}
service { 'iscsi': ensure => 'stopped', enable => 'false', hasstatus => true,}
service { 'netfs': ensure => 'stopped', enable => 'false', hasstatus => true,}
service { 'nfslock': ensure => 'stopped', enable => 'false', hasstatus => true,}
service { 'portreserve': ensure => 'stopped', enable => 'false', hasstatus => true,}
service { 'qpidd': ensure => 'stopped', enable => 'false', hasstatus => true,}
service { 'rpcidmapd': ensure => 'stopped', enable => 'false', hasstatus => true,}
# Package['Server Platform'] -> File['/home/dwilson/repos/'] -> Notify['Hello']
}
node default {
include build-host
}
5- Run 'puppet -v /mnt/build/vmhost-manifest.pp' to apply all changes.
6- Run 'brctl show' to check bridge interface.
7- To create an accessible repo for your Guests, mount Centos 6.2 minimal install CD on /mnt/cdrom.
8- cp -rf /mnt/cdrom/. /var/www/html/centos/x86_64
9- In /var/www/html/centos/x86_64, modify .treeinfo to have following:
[images-x86_64] kernel = isolinux/vmlinuz initrd = isolinux/initrd.img
10- Create vm0-ks.cfg KickStart file on the apache root as:
[root@vmhost ~]# cat /var/www/html/vm0-ks.cfg #KS file for VM install url --url http://192.168.0.40/centos/x86_64 # Use logical volumes zerombr clearpart --all --initlabel #clearpart --none bootloader --location=mbr --driveorder=vda,vdb --append=" rhgb crashkernel=auto quiet" part / --fstype ext4 --size 1 --grow --ondrive=vda part swap --size 1 --grow --ondrive=vdb # Kickstart file automatically generated by anaconda. #version=DEVEL lang en_US.UTF-8 keyboard us-acentos network --onboot yes --device eth0 --bootproto static --ip 192.168.0.41 --netmask 255.255.255.0 --gateway 192.160.0.1 --noipv6 --nameserver 192.168.0.1 --hostname web.local rootpw letmein firewall --disabled authconfig --enableshadow --passalgo=sha512 selinux --disabled timezone --utc Europe/London #part / --fstype=ext4 --grow --asprimary --size=200 #part swap --grow --asprimary --size=200 #repo --name="CentOS" --baseurl=cdrom:sr0 --cost=100 %packages --nobase @core
11- Create VM by:
virt-install --name=vm0 --cpuset=1 --ram=1024 --arch=x86_64 --network bridge=br0 --disk=/dev/mapper/vms-vm0--root --disk=/dev/mapper/vms-vm0--swap --location http://192.168.0.40/centos/x86_64/ --vnc --vnclisten=0.0.0.0 --noautoconsole --extra-args "ks=http://192.168.0.40/vm0-ks.cfg" --virt-type kvm --os-variant rhel6
12- To watch the progress vnc to your Host as above command creates a one extra screen for you.
13- To backup your Guest VM use following script:
#!/bin/sh if [ $1 ] then virsh suspend $1; lvcreate -L 100M -n $1-root-snapshot -s /dev/vms/$1-root; virsh resume $1; dd if=/dev/mapper/vms-$1--root--snapshot | gzip > ./$1-root.img.gz; lvremove /dev/mapper/vms-vm0--root--snapshot else echo "Please specify the vm name" fi
Enjoy!
