Aleksei Sviridkin
12c3cd03f8
## What this PR does Adds `docs/vm-external-vlan.md`, a guide for attaching a `vm-instance` VM directly to an external, physically-routed VLAN via a Linux bridge and a `bridge`-type NetworkAttachmentDefinition. The documented VM networking story is overlay-only (pod network + KubeOVN VPC subnets). Attaching a VM to a real VLAN — so it shares a broadcast domain with external hardware and takes an address from that VLAN's subnet — is undocumented, and the obvious `macvlan` approach silently fails with KubeVirt's default bridge binding: macvlan demultiplexes ingress by the child interface's MAC while bridge binding puts the guest's own MAC on the wire, so gateway replies reach the parent interface and are dropped before the guest. The working recipe is a Linux bridge + `bridge` CNI NAD. The guide covers why bridge and not macvlan, the host bridge, the NAD (one per tenant namespace), assigning a static guest address through cloud-init (the chart has no `networkData`), the always-present dual-homed pod NIC, and the post-recreate ARP staleness from KubeVirt regenerating the guest MAC. Docs-only; no chart or manifest changes. The recipe depends on the `bridge` CNI plugin being present in `/opt/cni/bin`; #3195 makes Cozystack's multus package stage the reference plugins there. ### Screenshots N/A — no UI changes. ### Release note ```release-note docs(vm-instance): add a guide for attaching a VM to an external VLAN via a Linux bridge and a bridge-type NetworkAttachmentDefinition ``` <!-- This is an auto-generated comment: release notes by coderabbit.ai --> ## Summary by CodeRabbit * **Documentation** * Added a new guide for connecting a `vm-instance` directly to an externally routed VLAN. * Includes setup steps for creating a bridged VLAN interface, defining a network attachment, and configuring the VM with a static IP. * Notes important networking caveats such as dual-homing behavior, MAC changes after recreation, and host-to-VM connectivity requirements. <!-- end of auto-generated comment: release notes by coderabbit.ai -->
Cozystack
Cozystack is a free platform and framework for building clouds.
Cozystack is a CNCF Sandbox Level Project that was originally built and sponsored by Ænix.
With Cozystack, you can transform a bunch of servers into an intelligent system with a simple REST API for spawning Kubernetes clusters, Database-as-a-Service, virtual machines, load balancers, HTTP caching services, and other services with ease.
Use Cozystack to build your own cloud or provide a cost-effective development environment.
Use-Cases
-
Using Cozystack to build a public cloud
You can use Cozystack as a backend for a public cloud -
Using Cozystack to build a private cloud
You can use Cozystack as a platform to build a private cloud powered by Infrastructure-as-Code approach -
Using Cozystack as a Kubernetes distribution
You can use Cozystack as a Kubernetes distribution for Bare Metal
Documentation
The documentation is located on the cozystack.io website.
Read the Getting Started section for a quick start.
If you encounter any difficulties, start with the troubleshooting guide and work your way through the process that we've outlined.
Versioning
Versioning adheres to the Semantic Versioning principles.
A full list of the available releases is available in the GitHub repository's Release section.
Contributions
Contributions are highly appreciated and very welcomed!
In case of bugs, please check if the issue has already been opened by checking the GitHub Issues section. If it isn't, you can open a new one. A detailed report will help us replicate it, assess it, and work on a fix.
You can express your intention to on the fix on your own. Commits are used to generate the changelog, and their author will be referenced in it.
If you have a concrete feature request, open an issue. For a cross-cutting or architectural change, open a design proposal in the community repo. For questions or early ideas, use GitHub Discussions. See CONTRIBUTING.md for the full routing.
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License
Cozystack is licensed under Apache 2.0.
The code is provided as-is with no warranties.
Commercial Support
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