Thursday, December 30, 2010

Working With KVM QEMU Host Upgrade

I have to update one of client KVM QEMU host server for new kernel and libvirt. I need to do the backup and I'm using virt-clone as per command below. Its take around half and hour for my 62GB of VM to be clone. Example of virt-clone that Im using

virt-clone -o  Ubuntu-Zimbra-Email -n Ubuntu-Zimbra-Email301210 -f /data/backup/Ubuntu-Zimbra-Email301210.qcow2

Ubuntu-Zimbra-Email = Name of the VM to be clone (need to shutdown the VM)
Ubuntu-Zimbra-Email301210 = Name of the new VM machine.
/data/backup/Ubuntu-Zimbra-Email301210.qcow2 = Directory where you want to put the VM file.

Replace the above thats suitable with your setup.

XML file for the clone machine is created under /etc/libvirt/qemu

You can read more about virt-clone here

virt-clone take sometimes. Im using screen so I can detach my terminal without worrying the connection will be lost. Command issues in Screen can be monitor. 

Detach " Ctrl and A D

To return to session : screen -r

Thursday, December 23, 2010

Using OpenDNS To Check DNS Entry

Updating your Domain DNS and you want to find out the entry is updated all over Internet, you should try CacheCheck by OpenDNS to find out what happening.

in reference to: OpenDNS > Support > CacheCheck (view on Google Sidewiki)

Today Notes Blog About Linux Open Source Computer Internet

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