January 2011

Install KVM on redhat

Installing KVM on RHEL6 is quite a simple process when having a yum repository. The main package is the kvm package (hypervisor). # yum install kvm To manage the vm’s you’ll need a tool called virt. # yum installĀ  virt-manager libvirt libvirt-python python-virtinst libvirt-client xorg-x11-xauth  

RHEL6 Virtualization virsh commands

List all virtual systems: #virsh list Start/Stop virtual os: #virsh start virtosname #virsh shutdown virtosname #virsh destroy virtosname (like a power off) Access a virtual console: # virsh console virtosname Autostart virsh server: # virsh autostart virtosname

Expand luks encrypted filesystems

umount /crypto fsck.ext4 -C 0 -f /dev/mapper/crypto cryptsetup luksClose crypto lvextend -L +100M /dev/cryptovg/crypto cryptsetup luksOpen /dev/cryptovg/crypto crypto cryptsetup -v resize crypto fsck.ext4 -f /dev/mapper/crypto resize4fs /dev/mapper/crypto (you’ll need to install e4fsprogs to use resize4fs) fsck.ext4 -f /dev/mapper/crypto mount /dev/mapper/crypto /crypto

create luks lvm partition

lvcreate -L 500M -n crypto cryptovg Fill your partition with random data: dd if=/dev/urandom of=/dev/ cryptovg /crypto initialize your partition: cryptsetup –verbose –verify-passphrase luksFormat /dev/ cryptovg / crypto open the newly encrypted device: cryptsetup luksOpen /dev/ cryptovg / crypto cryptosec check it’s there: ls -l /dev/mapper | grep cryptosec create a filesystem: mkfs.ext4 /dev/mapper/cryptosec mount… Read More »create luks lvm partition