Libro sobre Proxmox maestria
A Virtual Machine for a Virtual World
3. After the Proxmox nodes reboot, add the following argument in the <vmid>. conf file of the virtual machines used to create a nested virtual environment: args: -enable-nesting
4. Enable KVM hardware virtualization from the virtual machine option menu through GUI. Restart the nested virtual machine.
Network virtualization is a software approach to set up and maintain network without physical hardware. Proxmox has great features to virtualize the network for both real and nested virtual environments. By using virtualized networking, management becomes simpler and centralized. Since there is no physical hardware to deal with, the network ability can be extended within a minute's notice. Especially in a nested virtual environment, the use of virtualized network is very prominent. We will look at network virtualization at greater length in the next chapter. But it suffices to say that in order to set up a successful nested virtual environment, a better grasp of the Proxmox network feature is required. With the introduction of Open vSwitch (www.openvswitch.org) in Proxmox 3.2 and later, network virtualization is now much more efficient.
A good backup strategy is the last line of defense against disasters, such as hardware failure, environmental damages, accidental deletions, and misconfigurations. In a virtual environment, a backup strategy turns into a daunting task because of the number of machines needed to be backed up. In a busy production environment, virtual machines may be created and discarded whenever needed or not needed. Without a proper backup plan, the entire backup task can go out of control. Gone are those days when we only had few server hardware to deal with and backing them up was an easy task. Today's backup solutions have to deal with several dozens or possibly several hundred virtual machines.
Depending on the requirement, an administrator may have to backup all the virtual machines regularly instead of just the files inside them. Backing up an entire virtual machine takes up a very large amount of space after a while depending on how many previous backups we have. A granular file backup helps to quickly restore just the file needed but sure is a bad choice if the virtual server is badly damaged to a point that it becomes inaccessible. Here, we will see different backup options available in Proxmox, their advantages, and disadvantages.