Tag Archives: libvirt

unsupported driver name ‘file’ for disk ‘hdc’

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virsh add iso image like this:

virsh edit some_vm
 
<disk type='file' device='cdrom'>
      <driver name='qemu' type='raw'/>
      <source file='/var/lib/libvirt/images/systemrescuecd-6.0.2.iso'/>
      <target dev='hdc' bus='ide'/>
      <readonly/>
      <address type='drive' controller='0' bus='1' target='0' unit='0'/>
</disk>

LXC container on Centos

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LXC isn’t a real Virtualization technique, but is more like a chroot environment, but on “steroids”. Its similar to OpenVZ virtualization, but can use your native kernel version. In some cases its very important.

mkdir /var/lib/libvirt/lxc/centos-6-x86_64/etc/yum.repos.d/ -p  
cat /etc/yum.repos.d/CentOS-Base.repo |sed s/'$releasever'/6/g > /var/lib/libvirt/lxc/centos-6-x86_64/etc/yum.repos.d/CentOS-Base.repo
yum groupinstall core --installroot=/var/lib/libvirt/lxc/centos-6-x86_64/ --nogpgcheck -y
yum install plymouth libselinux-python --installroot=/var/lib/libvirt/lxc/centos-6-x86_64/ --nogpgcheck -y

You should crate selinux rule:

module lxc 1.0;

require {
type hald_t;
type virtd_lxc_t;
class dbus send_msg;
}

#============= hald_t ==============
allow hald_t virtd_lxc_t:dbus send_msg;

You should create manually your selinux rule to allow virtd_lxc_t to use dbus daemon. How crate custom selinux rules, you can check in other my article there.

chroot /var/lib/libvirt/lxc/centos-6-x86_64/ 

echo your_password_there |passwd root --stdin

#Fix root login on console

echo "pts/0" >>/etc/securetty

sed -i s/"session    required     pam_selinux.so close"/"#session    required     pam_selinux.so close"/g /etc/pam.d/login

sed -i s/"session    required     pam_selinux.so open"/"#session    required     pam_selinux.so open"/g /etc/pam.d/login

sed -i s/"session    required     pam_loginuid.so"/"#session    required     pam_loginuid.so"/g /etc/pam.d/login

#Configuring basic networking

cat > /etc/sysconfig/network << EOF

NETWORKING=yes

HOSTNAME=lxc.linux4you.tk

EOF

cat > /etc/sysconfig/network-scripts/ifcfg-eth0 << EOF

DEVICE=eth0

BOOTPROTO=dhcp

ONBOOT=yes

EOF

#Enabling sshd

chkconfig sshd on

# Fixing root login for sshd

sed -i s/"session    required     pam_selinux.so close"/"#session    required     pam_selinux.so close"/g /etc/pam.d/sshd

sed -i s/"session    required     pam_loginuid.so"/"#session    required     pam_loginuid.so"/g /etc/pam.d/sshd

sed -i s/"session    required     pam_selinux.so open env_params"/"#session    required     pam_selinux.so open env_params"/g /etc/pam.d/sshd

# Leaving the chroot'ed filesystem

exit
virt-install --connect lxc:/// --name test --ram 512 --vcpu 1 --filesystem /var/lib/libvirt/lxc/centos-6-x86_64/,/ --noautoconsole