chore: remove unused Vagrant release image (#13625)

* chore: remove unused Vagrant release image

Signed-off-by: Kay Yan <kay.yan@daocloud.io>

* docs: keep Vagrant image retirement in release notes

Signed-off-by: Kay Yan <kay.yan@daocloud.io>

---------

Signed-off-by: Kay Yan <kay.yan@daocloud.io>

RELEASE.md

@@ -12,7 +12,7 @@ The Kubespray Project is released on an as-needed basis. The process is as follo
 1. (Only for major releases) An approver creates a release branch in the form `release-X.Y`
 1. (For major releases) On the `master` branch: bump the version in `galaxy.yml` to the next expected major release (X.y.0 with y = Y + 1), make a Pull Request.
 1. (For minor releases) On the `release-X.Y` branch: bump the version in `galaxy.yml` to the next expected minor release (X.Y.z with z = Z + 1), make a Pull Request.
-1. The corresponding version of [quay.io/kubespray/kubespray:vX.Y.Z](https://quay.io/repository/kubespray/kubespray) and [quay.io/kubespray/vagrant:vX.Y.Z](https://quay.io/repository/kubespray/vagrant) container images are built and tagged. See the following `Container image creation` section for the details.
+1. The corresponding version of the [quay.io/kubespray/kubespray:vX.Y.Z](https://quay.io/repository/kubespray/kubespray) container image is built and tagged. See the following `Container image creation` section for the details.
 1. The release issue is closed
 1. An announcement email is sent to `dev@kubernetes.io` with the subject `[ANNOUNCE] Kubespray $VERSION is released`
 1. The topic of the #kubespray channel is updated with `vX.Y.Z is released! | ...`
@@ -76,12 +76,5 @@ nerdctl build -t quay.io/kubespray/kubespray:vX.Y.Z .
 nerdctl push quay.io/kubespray/kubespray:vX.Y.Z
 ```
 
-The container image `quay.io/kubespray/vagrant:vX.Y.Z` can be created from build.sh of test-infra/vagrant-docker/:
-
-```shell
-cd kubespray/test-infra/vagrant-docker/
-./build vX.Y.Z
-```
-
 Please note that the above operation requires the permission to push container images into quay.io/kubespray/.
 If you don't have the permission, please ask it on the #kubespray-dev channel.

docs/developers/ci-setup.md

@@ -9,11 +9,11 @@ See [.gitlab-ci.yml](/.gitlab-ci.yml) and the included files for an overview.
 Kubespray has 2 types of GitLab runners, both deployed on the Kubespray CI cluster (hosted on Oracle Cloud Infrastructure):
 
 - pods: use the [gitlab-ci kubernetes executor](https://docs.gitlab.com/runner/executors/kubernetes/)
-- vagrant: custom executor running in pods with access to the libvirt socket on the nodes
+- vagrant: custom executor running jobs inside KubeVirt VMs
 
 ## Vagrant
 
-Vagrant jobs are using the [quay.io/kubespray/vagrant](/test-infra/vagrant-docker/Dockerfile) docker image with `/var/run/libvirt/libvirt-sock` exposed from the host, allowing the container to boot VMs on the host.
+Vagrant jobs use the `quay.io/kubespray/vm-kubespray-ci` VM image configured in [.gitlab-ci/vagrant.yml](/.gitlab-ci/vagrant.yml). Vagrant and libvirt run inside the KubeVirt VM to provision the test nodes.
 
 ## CI Variables
 

test-infra/vagrant-docker/Dockerfile

@@ -1,16 +0,0 @@
-# Docker image published at quay.io/kubespray/vagrant
-
-ARG KUBESPRAY_VERSION
-FROM quay.io/kubespray/kubespray:${KUBESPRAY_VERSION}
-
-ENV VAGRANT_VERSION=2.3.7
-ENV VAGRANT_DEFAULT_PROVIDER=libvirt
-ENV VAGRANT_ANSIBLE_TAGS=facts
-
-RUN apt-get update && apt-get install -y wget libvirt-dev openssh-client rsync git build-essential
-
-# Install Vagrant
-RUN wget https://releases.hashicorp.com/vagrant/${VAGRANT_VERSION}/vagrant_${VAGRANT_VERSION}-1_amd64.deb && \
- dpkg -i vagrant_${VAGRANT_VERSION}-1_amd64.deb && \
- rm vagrant_${VAGRANT_VERSION}-1_amd64.deb && \
- vagrant plugin install vagrant-libvirt

test-infra/vagrant-docker/README.md

@@ -1,24 +0,0 @@
-# vagrant docker image
-
-This image is used for the vagrant CI jobs. It is using the libvirt driver.
-
-## Usage
-
-```console
-$ docker run --net host --rm -it -v /var/run/libvirt/libvirt-sock:/var/run/libvirt/libvirt-sock quay.io/kubespray/vagrant
-$ vagrant up
-Bringing machine 'k8s-1' up with 'libvirt' provider...
-Bringing machine 'k8s-2' up with 'libvirt' provider...
-Bringing machine 'k8s-3' up with 'libvirt' provider...
-[...]
-```
-
-## Cache
-
-You can set `/root/kubespray_cache` as a volume to keep cache between runs.
-
-## Building
-
-```shell
-./build.sh v2.12.5
-```

test-infra/vagrant-docker/build.sh

@@ -1,13 +0,0 @@
-#!/bin/sh
-set -euo pipefail
-
-if [ "$#" -ne 1 ]; then
-  echo "Usage: $0 tag" >&2
-  exit 1
-fi
-
-VERSION="$1"
-IMG="quay.io/kubespray/vagrant:${VERSION}"
-
-docker build . --build-arg "KUBESPRAY_VERSION=${VERSION}" --tag "$IMG"
-docker push "$IMG"