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Install Packages

The following commands will install the Linux packages required for VCL to manage a KVM host:

yum install libvirt virt-manager dejavu-lgc-sans-fonts bridge-utils libguestfs-tools -y
/sbin/chkconfig libvirtd on

echo "Starting the libvirtd service..."
/sbin/chkconfig libvirtd on
/sbin/service libvirtd start

The virt-manager package is optional.  It is a graphical utility which is used to manage KVM and other hypervisors controlled via libvirt.  The dejavu-lgc-sans-fonts package is usually necessary in order for virt-manager to render fonts correctly.

Configure Networking

The following commands will configure networking to allow KVM guests to communicate.  It configures a bridge named br0 on eth0, and br1 on eth1.  When configured this way, the network names in the VM host profile should be set to br0 and br1.

echo "Stopping the NetworkManager service..."
chkconfig NetworkManager off 2>/dev/null
service NetworkManager stop 2>/dev/null
yum erase NetworkManager -y

cat > /etc/sysconfig/network-scripts/ifcfg-eth0 <<EOF
DEVICE=eth0
ONBOOT=yes
BRIDGE=br0
NM_CONTROLLED=no
EOF
echo "Configured ifcfg-eth0:"
cat /etc/sysconfig/network-scripts/ifcfg-eth0

cat > /etc/sysconfig/network-scripts/ifcfg-br0 <<EOF
DEVICE=br0
TYPE=Bridge
BOOTPROTO=dhcp
ONBOOT=yes
DELAY=0
NM_CONTROLLED=no
EOF
echo "Configured ifcfg-br0:"
cat /etc/sysconfig/network-scripts/ifcfg-br0

cat > /etc/sysconfig/network-scripts/ifcfg-eth1 <<EOF
DEVICE=eth1
ONBOOT=yes
BRIDGE=br1
NM_CONTROLLED=no
EOF
echo "Configured ifcfg-eth1:"
cat /etc/sysconfig/network-scripts/ifcfg-eth1

cat > /etc/sysconfig/network-scripts/ifcfg-br1 <<EOF
DEVICE=br1
TYPE=Bridge
BOOTPROTO=dhcp
ONBOOT=yes
DELAY=0
NM_CONTROLLED=no
EOF
echo "Configured ifcfg-br1:"
cat /etc/sysconfig/network-scripts/ifcfg-br1

echo "Configuring eth0 bridge..."
ifdown br0 2>/dev/null
brctl delbr br0 2>/dev/null
brctl addbr br0
brctl addif br0 eth0

echo "Configuring eth1 bridge..."
ifdown br1 2>/dev/null
brctl delbr br1 2>/dev/null
brctl addbr br1
brctl addif br1 eth1

/sbin/chkconfig network on
/sbin/service network restart

Add a Network Storage Pool

The following commands will add an NFS storage pool named images to the KVM host.  The /images directory is exported via NFS from host 10.10.10.1.  This directory is mounted as /mnt/kvm1 on the KVM host.  An entry is added to /etc/fstab to ensure the directory is mounted if the KVM host is rebooted.

echo "Adding the images pool..."
virsh pool-destroy images 2>/dev/null
virsh pool-undefine images 2>/dev/null
umount /images 2>/dev/null
mkdir /images  2>/dev/null
chmod -R 0755 /images
echo '10.10.10.1:/mnt/kvm1 /images nfs vers=3,rsize=32768,wsize=32768,intr,rw,soft,bg 0 0' >> /etc/fstab
mount -a

virsh pool-define-as --name images --type dir --target /images
virsh pool-autostart --pool images
virsh pool-start images

Add a Local Storage Pool

The following commands will define a storage pool named local-vms pointing to the /vms directory on the local disk:

echo "Adding the local-vms pool..."
virsh pool-destroy local-vms 2>/dev/null
virsh pool-undefine local-vms 2>/dev/null
mkdir /vms 2>/dev/null
chmod -R 755 /vms
virsh pool-define-as --name local-vms --type dir --target /vms
virsh pool-autostart --pool local-vms
virsh pool-start local-vms

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