Holos: Docker Compose for KVM/QEMU Virtualization Management
By
zeroecco
Hot, fresh, and worth queueing round the block for.
Summary
Holos is a Docker Compose-like tool for KVM/QEMU virtualization that allows users to define multi-VM stacks in a single YAML file. It simplifies VM management by eliminating the need for libvirt, XML, or distributed control planes. The tool treats VMs as the primitive unit rather than containers, giving each workload its own kernel boundary, qcow2 overlay, and cloud-init seed. Users can quickly set up complex VM environments (like nginx and postgres VMs) that communicate with each other by name using a familiar Docker Compose syntax.
Key quotes
· 5 pulledDocker compose for KVM. Define multi-VM stacks in a single YAML file.
No libvirt, no XML, no distributed control plane.
The primitive is a VM, not a container. Every workload instance gets its own kernel boundary, its own qcow2 overlay, and its own cloud-init seed.
That's it. Two nginx VMs and a postgres VM, all on the same host, all talking to each other by name.
The holos.yaml format is deliberately similar to docker-compose: services - each service is a VM with its own image, resources, and cloud-init config
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