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Add Windows e2e tests via kind-in-WSL
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‎.gitattributes‎

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*.fsx text=auto
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*.hs text=auto
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# Shell scripts must keep LF endings even when checked out on Windows; a CRLF
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# turns `set -euxo pipefail` into `pipefail\r` (invalid option) once the file is
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# copied into WSL.
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*.sh text eol=lf
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*.csproj text=auto
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*.vbproj text=auto
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*.fsproj text=auto

‎.github/e2e/bootstrap-kind.sh‎

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#!/usr/bin/env bash
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# Bring up a single node Kubernetes control plane inside the kindest/node rootfs
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# that oci-to-wsl imported into WSL. kind normally runs this image as a Docker
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# container and drives kubeadm from the host through `docker exec`; here WSL
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# boots the image's systemd directly, so the equivalent bootstrap is performed
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# in place.
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set -euxo pipefail
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# --------------------------------------------------------------------------
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# Reproduce the setup that kind's container entrypoint (/usr/local/bin/entrypoint)
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# performs when running kindest/node inside Docker. WSL boots systemd directly
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# from the image's rootfs, so these steps must be done explicitly.
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# --------------------------------------------------------------------------
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# 1. Mount propagation — kubeadm and kubelet need shared mounts.
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mount --make-rshared / 2>/dev/null || true
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# 2. /dev/kmsg — kubelet reads kernel messages from this device and exits
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# immediately if it is missing. WSL2 does not create it by default.
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if [ ! -e /dev/kmsg ]; then
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ln -sf /dev/console /dev/kmsg
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fi
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# 3. Kernel parameters required by kube-proxy and networking.
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sysctl -w net.ipv4.ip_forward=1 || true
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sysctl -w net.ipv4.conf.all.forwarding=1 || true
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sysctl -w net.ipv6.conf.all.forwarding=1 2>/dev/null || true
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# 4. Ensure /run is a tmpfs (systemd usually handles this, but be safe).
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if ! mountpoint -q /run; then
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mount -t tmpfs tmpfs /run
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mkdir -p /run/lock
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fi
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# 5. Ensure a machine-id exists (kubelet uses it as node identity).
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if [ ! -s /etc/machine-id ]; then
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systemd-machine-id-setup 2>/dev/null || uuidgen | tr -d '-' > /etc/machine-id
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fi
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# 6. containerd configuration — use cgroupfs driver. WSL2's systemd has limited
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# cgroup delegation, so the cgroupfs driver is more reliable here.
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mkdir -p /etc/containerd
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containerd config default \
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| sed 's/SystemdCgroup = true/SystemdCgroup = false/' \
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> /etc/containerd/config.toml
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# 7. Start containerd.
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systemctl enable --now containerd
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systemctl restart containerd
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# Wait for the container runtime to accept requests.
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for _ in {1..60}; do
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if ctr --namespace k8s.io version >/dev/null 2>&1; then
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break
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fi
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sleep 2
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done
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# 8. The kindest/node image ships a kubelet drop-in (11-kind.conf) whose
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# ExecStartPre runs /kind/bin/create-kubelet-cgroup-v2.sh. That script
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# expects Docker-managed cgroup namespaces and fails in bare WSL2.
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# Patch it out so the kubelet service can start.
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if [ -f /etc/systemd/system/kubelet.service.d/11-kind.conf ]; then
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sed -i '/create-kubelet-cgroup-v2/d' /etc/systemd/system/kubelet.service.d/11-kind.conf
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systemctl daemon-reload
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fi
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systemctl stop kubelet 2>/dev/null || true
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# Initialize the control plane using a kubeadm config that forces cgroupfs and
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# disables swap checking.
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set +e
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kubeadm init \
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--ignore-preflight-errors=all \
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--config /dev/stdin <<'KUBEADM_CONFIG'
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apiVersion: kubeadm.k8s.io/v1beta4
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kind: InitConfiguration
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nodeRegistration:
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criSocket: unix:///run/containerd/containerd.sock
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ignorePreflightErrors:
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- all
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---
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apiVersion: kubeadm.k8s.io/v1beta4
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kind: ClusterConfiguration
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networking:
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podSubnet: 10.244.0.0/16
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apiServer:
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certSANs:
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- "127.0.0.1"
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- "localhost"
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---
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apiVersion: kubelet.config.k8s.io/v1beta1
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kind: KubeletConfiguration
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cgroupDriver: cgroupfs
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failSwapOn: false
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KUBEADM_CONFIG
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rc=$?
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set -e
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if [ $rc -ne 0 ]; then
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echo "=== kubeadm init failed (rc=$rc) — collecting diagnostics ===" >&2
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systemctl status kubelet --no-pager 2>&1 || true
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journalctl -xeu kubelet --no-pager -n 80 2>&1 || true
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echo "=== cgroup info ===" >&2
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mount | grep cgroup || true
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cat /proc/self/cgroup 2>/dev/null || true
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ls /sys/fs/cgroup/ 2>/dev/null || true
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exit 1
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fi
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export KUBECONFIG=/etc/kubernetes/admin.conf
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# Single node cluster: allow workloads to schedule on the control-plane node.
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kubectl taint nodes --all node-role.kubernetes.io/control-plane- 2>/dev/null || true
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# kindest/node bundles the default CNI (kindnet) manifest.
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kubectl apply -f /kind/manifests/default-cni.yaml
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kubectl wait --for=condition=Ready nodes --all --timeout=180s

‎.github/e2e/kind-wsl.yaml‎

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# oci-to-wsl profile that imports the kindest/node image into WSL as a
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# systemd-enabled distribution. Unlike the regular "kind in Docker" flow, the
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# Kubernetes node runs natively inside WSL, so no Docker daemon or nested
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# containers are required on the Windows runner.
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name: kind
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image: kindest/node:v1.32.2
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install_dir: C:\WSL\kind
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# kindest/node expects an init system; WSL boots systemd when configured.
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wsl_conf:
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mode: merge
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content: |
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[boot]
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systemd=true
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# Stage the bootstrap script that turns the imported rootfs into a running
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# single node control plane. Path is resolved relative to this profile.
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files:
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- src: ./bootstrap-kind.sh
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dst: /usr/local/bin/bootstrap-kind.sh
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mode: "0755"

‎.github/workflows/buildtest.yaml‎

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exit 1
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fi
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# Run the same end to end suite as the Linux `e2e` job, but on Windows. There
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# is no Linux Kubernetes distribution that runs natively on a Windows runner,
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# so the kindest/node image (which already bundles containerd, the kubelet and
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# the control-plane components) is imported straight into WSL with oci-to-wsl.
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# WSL2 is enabled by default on the runner, so no separate WSL provisioning is
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# needed, and the API server is reachable from the Windows host (which runs the
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# test process) through WSL2 localhost forwarding.
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e2e-windows-wsl:
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runs-on: windows-latest
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name: E2E (kind in WSL)
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steps:
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- uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
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with:
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fetch-depth: 0
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- name: Setup dotnet
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uses: actions/setup-dotnet@9a946fdbd5fb07b82b2f5a4466058b876ab72bb2 # v5.3.0
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with:
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dotnet-version: |
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8.0.x
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9.0.x
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10.0.x
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- name: Install oci-to-wsl
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shell: pwsh
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run: |
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$url = "https://github.com/tg123/oci-to-wsl/releases/download/v0.0.1/oci-to-wsl_windows_x86_64.zip"
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$expected = "79772846F1CE4A38E5B2841EA2406A070F4DB64F3DBF3EA32F04B519111FD003"
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Invoke-WebRequest $url -OutFile oci-to-wsl.zip
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$actual = (Get-FileHash oci-to-wsl.zip -Algorithm SHA256).Hash
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if ($actual -ne $expected) {
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throw "oci-to-wsl checksum mismatch: expected $expected, got $actual"
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}
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Expand-Archive -Force oci-to-wsl.zip -DestinationPath .
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- name: Start kind cluster in WSL
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shell: pwsh
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run: |
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# Import kindest/node into WSL as a systemd-enabled distro named "kind".
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.\oci-to-wsl.exe --profile .github/e2e/kind-wsl.yaml
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# Reboot the distro so the systemd configuration written by the profile
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# takes effect.
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wsl --shutdown
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# WSL terminates the lightweight VM once its last session exits, which
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# tears down the API server between steps and makes localhost:6443
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# connections fail with "actively refused". Hold an idle session open in
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# the background so the cluster (and WSL2 localhost forwarding) stay up
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# for the duration of the host-side test steps.
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Start-Process -FilePath wsl -ArgumentList '-d','kind','-u','root','--','sleep','infinity'
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# Bring up the single node control plane in place.
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wsl -d kind -u root -- bash /usr/local/bin/bootstrap-kind.sh
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# Export a kubeconfig for the Windows host. kubeadm points it at the WSL
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# eth0 address; rewrite it to localhost, which WSL2 forwards into WSL.
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wsl -d kind -u root -- cat /etc/kubernetes/admin.conf | Out-File -Encoding ascii kind.kubeconfig
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(Get-Content kind.kubeconfig) -replace 'server: https://[^ ]+', 'server: https://127.0.0.1:6443' | Set-Content kind.kubeconfig
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# Wait until the API server is reachable from the Windows host through
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# the forwarded port before handing off to the test steps.
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$ok = $false
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foreach ($i in 1..60) {
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if ((Test-NetConnection -ComputerName 127.0.0.1 -Port 6443 -WarningAction SilentlyContinue).TcpTestSucceeded) {
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$ok = $true
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break
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}
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Start-Sleep -Seconds 5
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}
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if (-not $ok) {
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throw "API server on 127.0.0.1:6443 was not reachable from the Windows host"
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}
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- name: Test
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shell: pwsh
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env:
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K8S_E2E_MINIKUBE: "1"
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KUBECONFIG: ${{ github.workspace }}\kind.kubeconfig
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run: |
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"" | Out-File -Encoding ascii skip.log
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dotnet test tests/E2E.Tests --logger "SkipTestLogger;file=$PWD/skip.log" -p:BuildInParallel=false
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if ((Get-Item skip.log).Length -gt 0) {
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Get-Content skip.log
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Write-Error "CASES MUST NOT BE SKIPPED"
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exit 1
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}
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- name: AOT Test
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shell: pwsh
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env:
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K8S_E2E_MINIKUBE: "1"
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KUBECONFIG: ${{ github.workspace }}\kind.kubeconfig
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run: |
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"" | Out-File -Encoding ascii skip.log
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dotnet test tests/E2E.Aot.Tests --logger "SkipTestLogger;file=$PWD/skip.log" -p:BuildInParallel=false
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if ((Get-Item skip.log).Length -gt 0) {
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Get-Content skip.log
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Write-Error "CASES MUST NOT BE SKIPPED"
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exit 1
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}
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on:
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pull_request:
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types: [assigned, opened, synchronize, reopened]

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