Linux KVM Virtualization Guest Operations

Internal

• Linux Virtualization Operations

List Available Guests

virsh list [--all]

Information about a Guest

Guest Configuration

The following command provides details, about:

• the amount of virtual memory and virtual CPU allocated to the guest.
• guest disk devices, their type (qcow, raw, etc.), their mapping on external storage volumes, etc.
• guest network devices.
• etc.

 virsh dumpxml <guest-name>

Filesystems

virt-filesystems --all -lh -d <guest-name>

Start/Stop Guest Virtual Machines

virsh start [--console] <vm-name>

virsh shutdown <vm-name>

Connect to the Guest Virtual Machine

virsh console

Create a Guest Virtual Machine

Can I name a guest "ose36.master", or "environment-name.host-in-environment-name"?. It would be useful in virsh list.

Virtualization host storage and host-level networking must be configured as a prerequisite to creating guest virtual machines. Once storage pools and storage volumes are made available, and the networking is configured, guest virtual machines can be created with

virt-install

If the XML definition of a virtual machine is available, it can be created with:

virsh define

Add Storage to Guests

Adding Storage to Guests

Cloning and Snapshotting

The goal of a cloning operation is to create an entirely new guest, based on the configuration of an existing guest. Entirely new storage must be provisioned during the cloning operation, and the O/S image must be transferred on the new storage and updated as described below. Also, care should be taken to avoid conflict while accessing shared resources - memory, CPUs, network devices.

The goal of a snapshotting operation is to preserve the state of the guest, at a certain moment in time, so it can be reverted to, later, possibly after the guest was removed for a while from the virtualization host.

Clone a Guest Virtual Machine

Cloning a Guest Virtual Machine

Snapshot Guest Virtual Machine

Snapshot a Guest Virtual Machine