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ci: explore and implement multi-distro e2e testing matrix (#208)
Signed-off-by: Aashish Pandit <imshubham.22apr@gmail.com>
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‎.github/workflows/ci_on_push.yml‎

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name: urunc CI
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on:
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push:
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branches: ["chore/issue-208-e2e-multi-distro"]
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pull_request:
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branches: ["main"]
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types: [opened,synchronize,reopened,labeled]

‎.github/workflows/vm_test.yml‎

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@@ -54,15 +54,28 @@ jobs:
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prepare:
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name: VM test
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runs-on: ${{ matrix.runner }}
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container:
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image: ${{ matrix.container_image }}
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options: --privileged
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strategy:
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fail-fast: false
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matrix:
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arch: ${{ fromJSON(inputs.runner-archs) }}
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test: ["test_ctr","test_nerdctl","test_crictl","test_docker"]
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distro: [ubuntu, fedora, rockylinux, opensuse]
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include:
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- arch: amd64
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runner: ubuntu-22.04
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- arch: arm64
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runner: ubuntu-22.04-arm
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- distro: ubuntu
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container_image: ubuntu:22.04
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- distro: fedora
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container_image: fedora:latest
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- distro: rockylinux
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container_image: rockylinux:9
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- distro: opensuse
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container_image: opensuse/leap:latest
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steps:
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- name: Validate inputs (prevent command injection)
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- name: Install base dependencies
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run: |
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sudo apt-get update
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sudo apt-get install -y git wget build-essential libseccomp-dev pkg-config bc make qemu-system
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if [ -x "$(command -v apt-get)" ]; then
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sudo apt-get update
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sudo apt-get install -y git wget build-essential libseccomp-dev pkg-config bc make qemu-system sudo
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elif [ -x "$(command -v dnf)" ]; then
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sudo dnf install -y git wget gcc gcc-c++ make libseccomp-devel pkgconfig bc qemu-system-x86 sudo
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elif [ -x "$(command -v zypper)" ]; then
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sudo zypper install -y git wget gcc gcc-c++ make libseccomp-devel pkg-config bc qemu-x86 sudo
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else
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echo "Unsupported distribution"
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exit 1
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fi
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wget https://s3.nbfc.io/nbfc-assets/github/urunc/bin/virtiofsd
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sudo chmod +x virtiofsd
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sudo mv virtiofsd /usr/libexec/virtiofsd
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RUNC_VERSION: ${{ inputs.runc_version }}
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run: |
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SAFE_RUNC="${RUNC_VERSION}"
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wget -q "https://github.com/opencontainers/runc/releases/download/v${SAFE_RUNC}/runc.$(dpkg --print-architecture)"
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sudo install -m 755 runc.$(dpkg --print-architecture) /usr/local/sbin/runc
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rm -f ./runc.$(dpkg --print-architecture)
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ARCH=$(uname -m)
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case $ARCH in
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x86_64) BIN_ARCH="amd64" ;;
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aarch64) BIN_ARCH="arm64" ;;
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*) BIN_ARCH=$ARCH ;;
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esac
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wget -q "https://github.com/opencontainers/runc/releases/download/v${SAFE_RUNC}/runc.${BIN_ARCH}"
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sudo install -m 755 runc.${BIN_ARCH} /usr/local/sbin/runc
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rm -f ./runc.${BIN_ARCH}
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- name: Install containerd
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env:
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CONTAINERD_VERSION: ${{ inputs.containerd_version }}
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run: |
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SAFE_CONTAINERD="${CONTAINERD_VERSION}"
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wget -q "https://github.com/containerd/containerd/releases/download/v${SAFE_CONTAINERD}/containerd-${SAFE_CONTAINERD}-linux-$(dpkg --print-architecture).tar.gz"
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sudo tar Cxzvf /usr/local "containerd-${SAFE_CONTAINERD}-linux-$(dpkg --print-architecture).tar.gz"
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rm -f "containerd-${SAFE_CONTAINERD}-linux-$(dpkg --print-architecture).tar.gz"
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ARCH=$(uname -m)
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case $ARCH in
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x86_64) BIN_ARCH="amd64" ;;
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aarch64) BIN_ARCH="arm64" ;;
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*) BIN_ARCH=$ARCH ;;
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esac
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wget -q "https://github.com/containerd/containerd/releases/download/v${SAFE_CONTAINERD}/containerd-${SAFE_CONTAINERD}-linux-${BIN_ARCH}.tar.gz"
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sudo tar Cxzvf /usr/local "containerd-${SAFE_CONTAINERD}-linux-${BIN_ARCH}.tar.gz"
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rm -f "containerd-${SAFE_CONTAINERD}-linux-${BIN_ARCH}.tar.gz"
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- name: Set up containerd service
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env:
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wget -q "https://raw.githubusercontent.com/containerd/containerd/v${SAFE_CONTAINERD}/containerd.service"
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sudo rm -f /lib/systemd/system/containerd.service
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sudo mv containerd.service /lib/systemd/system/containerd.service
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sudo systemctl daemon-reload
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sudo systemctl enable --now containerd
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if command -v systemctl >/dev/null && systemctl is-system-running >/dev/null 2>&1; then
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sudo systemctl daemon-reload
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sudo systemctl enable --now containerd
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else
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echo "Systemd not available, starting containerd manually"
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sudo containerd &
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sleep 5
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fi
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- name: Configure containerd
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- name: Restart containerd
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run: |
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sudo mkdir -p /etc/containerd/
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sudo mv /etc/containerd/config.toml /etc/containerd/config.toml.bak || true
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sudo containerd config default | sudo tee /etc/containerd/config.toml
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sudo systemctl restart containerd
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if command -v systemctl >/dev/null && systemctl is-system-running >/dev/null 2>&1; then
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sudo systemctl restart containerd
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else
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sudo pkill containerd || true
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sudo containerd &
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sleep 5
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fi
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- name: Setup devmapper
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run: |
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pod_annotations = ["com.urunc.unikernel.*"]
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snapshotter = "devmapper"
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EOT
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sudo systemctl restart containerd
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if command -v systemctl >/dev/null && systemctl is-system-running >/dev/null 2>&1; then
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sudo systemctl restart containerd
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else
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sudo pkill containerd || true
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sudo containerd &
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sleep 5
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fi
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- name: Setup block-based mountpoint
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run: |
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CNI_VERSION: ${{ inputs.cni_version }}
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run: |
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SAFE_CNI="${CNI_VERSION}"
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wget -q "https://github.com/containernetworking/plugins/releases/download/v${SAFE_CNI}/cni-plugins-linux-$(dpkg --print-architecture)-v${SAFE_CNI}.tgz"
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ARCH=$(uname -m)
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case $ARCH in
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x86_64) BIN_ARCH="amd64" ;;
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aarch64) BIN_ARCH="arm64" ;;
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*) BIN_ARCH=$ARCH ;;
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esac
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wget -q "https://github.com/containernetworking/plugins/releases/download/v${SAFE_CNI}/cni-plugins-linux-${BIN_ARCH}-v${SAFE_CNI}.tgz"
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sudo mkdir -p /opt/cni/bin
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sudo tar Cxzvf /opt/cni/bin "cni-plugins-linux-$(dpkg --print-architecture)-v${SAFE_CNI}.tgz"
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rm -f "cni-plugins-linux-$(dpkg --print-architecture)-v${SAFE_CNI}.tgz"
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sudo tar Cxzvf /opt/cni/bin "cni-plugins-linux-${BIN_ARCH}-v${SAFE_CNI}.tgz"
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rm -f "cni-plugins-linux-${BIN_ARCH}-v${SAFE_CNI}.tgz"
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- name: Install nerdctl
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env:
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NERDCTL_VERSION: ${{ inputs.nerdctl_version }}
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run: |
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SAFE_NERDCTL="${NERDCTL_VERSION}"
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wget -q "https://github.com/containerd/nerdctl/releases/download/v${SAFE_NERDCTL}/nerdctl-${SAFE_NERDCTL}-linux-$(dpkg --print-architecture).tar.gz"
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sudo tar Cxzvf /usr/local/bin "nerdctl-${SAFE_NERDCTL}-linux-$(dpkg --print-architecture).tar.gz"
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rm -f "nerdctl-${SAFE_NERDCTL}-linux-$(dpkg --print-architecture).tar.gz"
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ARCH=$(uname -m)
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case $ARCH in
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x86_64) BIN_ARCH="amd64" ;;
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aarch64) BIN_ARCH="arm64" ;;
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*) BIN_ARCH=$ARCH ;;
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esac
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wget -q "https://github.com/containerd/nerdctl/releases/download/v${SAFE_NERDCTL}/nerdctl-${SAFE_NERDCTL}-linux-${BIN_ARCH}.tar.gz"
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sudo tar Cxzvf /usr/local/bin "nerdctl-${SAFE_NERDCTL}-linux-${BIN_ARCH}.tar.gz"
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rm -f "nerdctl-${SAFE_NERDCTL}-linux-${BIN_ARCH}.tar.gz"
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- name: Install crictl
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env:
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if: ${{ matrix.arch == 'amd64' }}
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id: kvm-setup
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run: |
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echo 'KERNEL=="kvm", GROUP="kvm", MODE="0666", OPTIONS+="static_node=kvm"' | sudo tee /etc/udev/rules.d/99-kvm4all.rules
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sudo udevadm control --reload-rules
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sudo udevadm trigger --name-match=kvm
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sudo usermod -a -G kvm $USER
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if [ -c /dev/kvm ]; then
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echo 'KERNEL=="kvm", GROUP="kvm", MODE="0666", OPTIONS+="static_node=kvm"' | sudo tee /etc/udev/rules.d/99-kvm4all.rules || true
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if command -v udevadm >/dev/null; then
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sudo udevadm control --reload-rules || true
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sudo udevadm trigger --name-match=kvm || true
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fi
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if command -v usermod >/dev/null; then
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sudo usermod -a -G kvm $USER || true
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fi
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else
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echo "/dev/kvm not found, skipping KVM setup"
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fi
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- name: Prepare urunc folder
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id: prepare
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if: failure()
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run: |
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echo "=== urunc debug logs ==="
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sudo journalctl --identifier=urunc --no-pager
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if command -v journalctl >/dev/null; then
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sudo journalctl --identifier=urunc --no-pager || true
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else
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echo "journalctl not available"
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fi

‎docs/explorations/e2e-multi-distro-options.md‎

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# Exploration: Multi-Distribution E2E Testing for urunc
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## Objective
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As part of Issue #208, we explored options to expand the E2E test suite to distributions beyond Ubuntu (the default GitHub Actions runner).
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## Options Explored
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### 1. GitHub Actions Job Containers
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**Description**: Use the `container:` property in GitHub Actions jobs to run steps inside a specific Docker image (e.g., Fedora, Rocky Linux, OpenSUSE).
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- **Pros**:
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- Natively supported by GitHub Actions.
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- Easy to matrix over different images.
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- Fast setup compared to full VMs.
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- **Cons**:
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- No native `systemd` support in standard containers (requires workarounds for `containerd`).
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- Requires passing `/dev/kvm` and other host devices to the container.
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- Path differences and package manager variations must be handled in scripts.
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### 2. Vagrant with KVM/QEMU
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**Description**: Use Vagrant to provision full virtual machines on the GHA runner.
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- **Pros**:
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- Full OS isolation with `systemd` and kernel modules.
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- Closest to real-world production environments.
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- **Cons**:
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- Requires nested virtualization support on the runner.
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- Significant overhead and slower execution.
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- Complex setup in GHA (managing providers like libvirt/virtualbox).
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### 3. Docker-in-Docker (Kind-like approach)
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**Description**: Run tests inside a container that is started via `docker run` from the host, similar to how `kind_test.yml` works.
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- **Pros**:
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- Allows fine-grained control over container options (privileged, volume mounts).
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- **Cons**:
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- Adds an extra layer of abstraction.
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- Scripting becomes more complex (`docker exec` everywhere).
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## Proposed Implementation (PoC)
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We chose to implement a **hybrid approach using Job Containers** for simplicity and integration with existing GHA workflows, while adding distro-agnostic logic to the setup scripts.
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### Implementation Details
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1. **Workflow Matrix**: Updated `.github/workflows/vm_test.yml` to include a `distro` matrix.
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2. **Container Configuration**: Jobs for non-Ubuntu distros use specified container images.
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3. **Distro-Agnostic Setup**:
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- Replaced hardcoded `apt-get` with a logic that detects the package manager (`apt`, `dnf`, `zypper`).
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- Added conditional logic for `systemd` vs. direct process execution for `containerd`.
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- Ensured dependencies like `libseccomp` and `qemu` are correctly mapped to distro-specific package names.
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## Conclusion
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The Job Container approach provides a good balance between test coverage and complexity. While it requires bypassing `systemd` in some cases, it effectively validates `urunc`'s compatibility with different system libraries and package versions across various Linux distributions.

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