k8s.yaml

# Deploy kubernetes via kubeadm.
# $ limactl start ./k8s.yaml
# $ limactl shell k8s sudo kubectl

# It can be accessed from the host by exporting the kubeconfig file;
# the ports are already forwarded automatically by lima:
#
# $ export KUBECONFIG=$PWD/kubeconfig.yaml
# $ limactl shell k8s sudo cat /etc/kubernetes/admin.conf >$KUBECONFIG
# $ kubectl get no
# NAME       STATUS   ROLES                  AGE   VERSION
# lima-k8s   Ready    control-plane,master   44s   v1.22.3

# This example requires Lima v0.7.0 or later.
images:
# Image is set to focal (20.04 LTS) for long-term stability
# Hint: run `limactl prune` to invalidate the "current" cache
- location: "https://cloud-images.ubuntu.com/focal/current/focal-server-cloudimg-amd64.img"
  arch: "x86_64"
- location: "https://cloud-images.ubuntu.com/focal/current/focal-server-cloudimg-arm64.img"
  arch: "aarch64"
# Mounts are disabled in this example, but can be enabled optionally.
mounts: []
containerd:
  system: true
  user: false
# See https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/
provision:
- mode: system
  script: |
    #!/bin/bash
    set -eux -o pipefail
    command -v kubectl  >/dev/null 2>&1 && exit 0
    # Installing kubeadm on your hosts
    cat <<EOF | sudo tee /etc/modules-load.d/containerd.conf
    overlay
    br_netfilter
    EOF
    modprobe overlay
    modprobe br_netfilter
    cat <<EOF | sudo tee /etc/sysctl.d/99-kubernetes-cri.conf
    net.bridge.bridge-nf-call-iptables  = 1
    net.ipv4.ip_forward                 = 1
    net.bridge.bridge-nf-call-ip6tables = 1
    EOF
    sysctl --system
    export DEBIAN_FRONTEND=noninteractive
    apt-get update
    apt-get install -y apt-transport-https ca-certificates curl
    curl -fsSLo /usr/share/keyrings/kubernetes-archive-keyring.gpg https://packages.cloud.google.com/apt/doc/apt-key.gpg
    echo "deb [signed-by=/usr/share/keyrings/kubernetes-archive-keyring.gpg] https://apt.kubernetes.io/ kubernetes-xenial main" | sudo tee /etc/apt/sources.list.d/kubernetes.list
    apt-get update
    # cri-tools
    apt-get install -y cri-tools
    cat  <<EOF | sudo tee /etc/crictl.yaml
    runtime-endpoint: unix:///run/containerd/containerd.sock
    image-endpoint: unix:///run/containerd/containerd.sock
    EOF
    # cni-plugins
    apt-get install -y kubernetes-cni
    rm -f /etc/cni/net.d/*.conf*
    apt-get install -y kubelet kubeadm kubectl && apt-mark hold kubelet kubeadm kubectl
    systemctl enable --now kubelet
- mode: system
  script: |
    #!/bin/bash
    set -eux -o pipefail
    test -e /etc/kubernetes/admin.conf && exit 0
    export KUBECONFIG=/etc/kubernetes/admin.conf
    kubeadm config images list
    kubeadm config images pull
    # Initializing your control-plane node
    kubeadm init --cri-socket=/run/containerd/containerd.sock --pod-network-cidr=10.244.0.0/16 --apiserver-cert-extra-sans 127.0.0.1
    # Installing a Pod network add-on
    kubectl apply -f https://raw.githubusercontent.com/flannel-io/flannel/v0.14.0/Documentation/kube-flannel.yml
    # Control plane node isolation
    kubectl taint nodes --all node-role.kubernetes.io/master-
    sed -e "s/${LIMA_CIDATA_SLIRP_IP_ADDRESS:-192.168.5.15}/127.0.0.1/" -i $KUBECONFIG
    mkdir -p ${HOME:-/root}/.kube && cp -f $KUBECONFIG ${HOME:-/root}/.kube/config
probes:
- description: "kubectl to be installed"
  script: |
    #!/bin/bash
    set -eux -o pipefail
    if ! timeout 30s bash -c "until command -v kubectl >/dev/null 2>&1; do sleep 3; done"; then
      echo >&2 "kubectl is not installed yet"
      exit 1
    fi
  hint: |
    See "/var/log/cloud-init-output.log". in the guest
- description: "kubeadm to be completed"
  script: |
    #!/bin/bash
    set -eux -o pipefail
    if ! timeout 300s bash -c "until test -f /etc/kubernetes/admin.conf; do sleep 3; done"; then
      echo >&2 "k8s is not running yet"
      exit 1
    fi
  hint: |
    The k8s kubeconfig file has not yet been created.
- description: "kubernetes cluster to be running"
  script: |
    #!/bin/bash
    set -eux -o pipefail
    if ! timeout 300s bash -c "until sudo kubectl version >/dev/null 2>&1; do sleep 3; done"; then
      echo >&2 "kubernetes cluster is not up and running yet"
      exit 1
    fi
message: |
  To run `kubectl` on the host (assumes kubectl is installed):
  $ mkdir -p "{{.Dir}}/conf"
  $ export KUBECONFIG="{{.Dir}}/conf/kubeconfig.yaml"
  $ limactl shell {{.Name}} sudo cat /etc/kubernetes/admin.conf >$KUBECONFIG
  $ kubectl ...