Lima based Ubuntu with Containerd startup

README.md

Some helpful commands

limactl start ./ubuntu2404.yaml limactl list

limactl shell ubuntu2404

limactl stop ubuntu2404 limactl restart ubuntu2404

init.sh

#!/bin/bash

set -e

sudo swapoff -a

# Install build dependencies (apt handles already-installed packages)
sudo apt-get update
sudo apt-get install -y gperf build-essential pkg-config

# Match the macos root directory
export HOME=/Users/$USER

pushd $HOME/go/src/github.com/containerd/containerd

# Download and extract Go if not already present
mkdir -p $HOME/linux/

# Detect architecture
ARCH=$(uname -m)
case $ARCH in
    x86_64)  GO_ARCH="amd64" ;;
    aarch64) GO_ARCH="arm64" ;;
    armv7l)  GO_ARCH="armv6l" ;;
    *)       echo "Unsupported architecture: $ARCH"; exit 1 ;;
esac

GO_TARBALL="$HOME/linux/go1.25.5.linux-${GO_ARCH}.tar.gz"
if [ ! -f "$GO_TARBALL" ]; then
    echo "Downloading Go for ${GO_ARCH}..."
    curl -L "https://dl.google.com/go/go1.25.5.linux-${GO_ARCH}.tar.gz" -o "$GO_TARBALL"
fi
if [ ! -x "$HOME/linux/go/bin/go" ]; then
    echo "Extracting Go..."
    tar -C $HOME/linux/ -xzf "$GO_TARBALL"
fi
export PATH=$PATH:$HOME/linux/go/bin

# Install seccomp if not present
if ! pkg-config --exists libseccomp 2>/dev/null; then
    echo "Installing seccomp..."
    script/setup/install-seccomp
else
    echo "Skipping seccomp (already installed)"
fi

# Install runc if not present
if ! command -v runc &>/dev/null; then
    echo "Installing runc..."
    script/setup/install-runc
else
    echo "Skipping runc (already installed)"
fi

# Install CNI if not present
CNI_DIR="/opt/cni/bin"
if [ ! -d "$CNI_DIR" ] || [ -z "$(ls -A $CNI_DIR 2>/dev/null)" ]; then
    echo "Installing CNI..."
    script/setup/install-cni $(grep containernetworking/plugins go.mod | awk '{print $2}')
else
    echo "Skipping CNI (already installed)"
fi

# Build containerd if not already built
if [ ! -x "bin/containerd" ]; then
    echo "Building containerd..."
    make binaries GO_BUILD_FLAGS="-mod=vendor"
else
    echo "Skipping build (binaries already exist)"
fi

# Install containerd if not present
if ! command -v containerd &>/dev/null; then
    echo "Installing containerd..."
    sudo make install
else
    echo "Skipping install (containerd already installed)"
fi

# Stop and disable pre-existing containerd service to ensure a clean state.
if sudo systemctl is-active --quiet containerd; then
  sudo systemctl stop containerd
fi
if sudo systemctl is-enabled --quiet containerd; then
  sudo systemctl disable containerd
fi

sudo mkdir -p /etc/containerd
sudo tee /etc/containerd/config.toml > /dev/null <<EOF
version = 2
required_plugins = ["io.containerd.grpc.v1.cri"]
[plugins."io.containerd.grpc.v1.cri".containerd]
  default_runtime_name = "runc"
[plugins."io.containerd.grpc.v1.cri".containerd.runtimes.runc]
  runtime_type = "io.containerd.runc.v2"
[plugins."io.containerd.grpc.v1.cri".containerd.runtimes.runc.options]
  # Ensure containerd uses the runc binary installed from source.
  BinaryName = "/usr/local/sbin/runc"
  SystemdCgroup = true
# Required for certain node e2e tests.
[plugins."io.containerd.grpc.v1.cri".containerd.runtimes.test-handler]
  runtime_type = "io.containerd.runc.v2"
[plugins."io.containerd.grpc.v1.cri".containerd.runtimes.test-handler.options]
  # Ensure containerd uses the runc binary installed from source.
  BinaryName = "/usr/local/sbin/runc"
  SystemdCgroup = true
EOF

sudo cp containerd.service /etc/systemd/system/
sudo systemctl daemon-reload
sudo systemctl start containerd

# Wait and verify the daemon is ready.
sleep 5
sudo ctr version


popd

ubuntu2404.yaml

vmType: vz
rosetta:
  enabled: true
  binfmt: true

images:
  - location: "https://cloud-images.ubuntu.com/releases/24.04/release/ubuntu-24.04-server-cloudimg-amd64.img"
    arch: "x86_64"
  - location: "https://cloud-images.ubuntu.com/releases/24.04/release/ubuntu-24.04-server-cloudimg-arm64.img"
    arch: "aarch64"

containerd:
  system: false
  user: false

mounts:
  - location: "~"
    writable: true