QEMU List VMS: A Comprehensive Guide

QEMU, a popular open-source emulator, has numerous applications beyond its primary role as a machine emulator. One of its lesser-known uses is as a virtualizer, particularly in conjunction with KVM kernel components.

In this article, we'll delve into the world of QEMU and explore its features, including its ability to run operating systems and programs on one machine using another. We'll also examine its multi-node configuration capabilities, distributed replicated block device (DRBD), and more.

Multi-Node Configuration with Docker-Compose

QEMU's flexibility extends to its support for multi-node configurations, which can be achieved through Docker-Compose. This feature enables the creation of complex architectures with multiple nodes, making it an attractive option for developers and system administrators alike.

Non-Interactive IBM Z LPAR Autoinstall (s390x)

For those working with IBM Z systems, QEMU offers a non-interactive autoinstall option for LPAR configurations. This feature simplifies the installation process, allowing users to quickly set up their virtual machines without manual intervention.

Distributed Replicated Block Device (DRBD)

Another key benefit of QEMU is its support for DRBD, a distributed replicated block device that provides high availability and fault tolerance for critical data. By leveraging QEMU's DRBD capabilities, users can ensure the integrity of their data and minimize downtime in the event of hardware failures.

Choosing Between arm64 and arm64+largemem Installer Options

When setting up a new VM with QEMU, users are presented with two installer options: arm64 and arm64+largemem. While both options share similarities, there are key differences between them that require careful consideration. In this article, we'll explore the implications of choosing one option over the other.

Non-Interactive IBM z/VM Autoinstall (s390x)

For users working with IBM z/VM systems, QEMU offers a non-interactive autoinstall option for s390x configurations. This feature streamlines the installation process, making it easier to set up virtual machines without manual intervention.

The Order of Transfer Depends on Storage Used

When migrating VMs between different storage solutions, the order of transfer is crucial. For instance, if you're using Virtual CDROM and Petitboot install on ppc64el, the transfer process may require specific file naming conventions.

Migrating VMs with Multiple Disks

Migrating VMs with multiple disks can be a complex process, requiring careful attention to detail. QEMU's support for distributed replicated block devices (DRBD) makes it an attractive option for users working with large-scale architectures.

Automatic Adding and Deletion of IP Addresses

QEMU's ability to automatically add and delete IP addresses simplifies the migration process, making it easier to manage complex network configurations.

In conclusion, QEMU is a powerful tool that offers a wide range of features and capabilities beyond its primary role as a machine emulator. By exploring its various features, including multi-node configuration, distributed replicated block devices, and non-interactive autoinstall options, users can unlock the full potential of this versatile emulator.

Qemu list vms