K8S Master and Worker with CRI-O CRT LXD Profile for Ubuntu 20.04

k8smaster-profile.yaml

config:
  limits.cpu: 4
  limits.memory: 4GB
  linux.kernel_modules: overlay, br_netfilter
  user.user-data: |
    #cloud-config
    package_upgrade: true
    users:
      - name: k8smaster
        gecos: K8S Master
        home: /home/k8smaster
        shell: /bin/bash
        groups: [adm, audio, cdrom, dialout, floppy, video, plugdev, dip, netdev]
        lock_passwd: False
        passwd: $1$EP0wydeS$GC2LS.J8QgzpdUlWPezxM/
        sudo: ALL=(ALL) NOPASSWD:ALL
    runcmd:
    - export VERSION=1.20
    - export OS=xUbuntu_20.04
    - 'echo "deb http://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/$OS/ /" > /etc/apt/sources.list.d/devel:kubic:libcontainers:stable.list'
    - 'echo "deb http://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable:/cri-o:/$VERSION/$OS/ /" > /etc/apt/sources.list.d/devel:kubic:libcontainers:stable:cri-o:$VERSION.list'
    - 'curl -L https://download.opensuse.org/repositories/devel:kubic:libcontainers:stable:cri-o:$VERSION/$OS/Release.key | apt-key add -'
    - 'curl -L https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/$OS/Release.key | apt-key add -'
    - apt-get update
    - apt-get install -y cri-o cri-o-runc
    - cat <<EOF | tee /etc/modules-load.d/criod.conf
    - overlay
    - br_netfilter
    - EOF
    - cat <<EOF | 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
    - modprobe overlay
    - modprobe br_netfilter
    - apt-get install -y apt-transport-https curl
    - curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add -
    - cat <<EOF | tee /etc/apt/sources.list.d/kubernetes.list
    - deb https://apt.kubernetes.io/ kubernetes-xenial main
    - EOF
    - apt-get update
    - apt-get install -y kubelet kubeadm kubectl
    - apt-mark hold kubelet kubeadm kubectl
    - cat <<EOF | tee config.yaml
    - 'apiVersion: kubeadm.k8s.io/v1beta2'
    - 'kind: InitConfiguration'
    - 'nodeRegistration:'
    - '  criSocket: "/var/run/crio/crio.sock"'
    - '---'
    - 'apiVersion: kubeadm.k8s.io/v1beta2'
    - 'kind: ClusterConfiguration'
    - 'networking:'
    - '  podSubnet: 10.244.0.0/16'
    - '---'
    - 'apiVersion: kubelet.config.k8s.io/v1beta1'
    - 'kind: KubeletConfiguration'
    - 'cgroupDriver: "systemd"'
    - EOF
    - systemctl enable --now crio
    - kubeadm init --config config.yaml
    - mkdir -p $HOME/.kube
    - cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
    - chown $(id -u):$(id -g) $HOME/.kube/config
    - kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
description: "Profile to define k8s master"
devices:
  eth0:
    name: eth0
    network: lxdbr0
    type: nic
  root:
    path: /
    pool: default
    type: disk
name: k8smaster
used_by: []

k8sworker-profile.yaml

config:
  limits.cpu: 24
  limits.memory: 64GB
  linux.kernel_modules: overlay, br_netfilter
  user.user-data: |
    #cloud-config
    package_upgrade: true
    users:
      - name: k8sworker
        gecos: K8S Worker
        home: /home/k8sworker
        shell: /bin/bash
        groups: [adm, audio, cdrom, dialout, floppy, video, plugdev, dip, netdev]
        lock_passwd: False
        passwd: $1$iOZiQ.Ei$jTD7RzO3QhXAYD789BP6Q/
        sudo: ALL=(ALL) NOPASSWD:ALL
    runcmd:
    - export VERSION=1.20
    - export OS=xUbuntu_20.04
    - 'echo "deb http://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/$OS/ /" > /etc/apt/sources.list.d/devel:kubic:libcontainers:stable.list'
    - 'echo "deb http://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable:/cri-o:/$VERSION/$OS/ /" > /etc/apt/sources.list.d/devel:kubic:libcontainers:stable:cri-o:$VERSION.list'
    - 'curl -L https://download.opensuse.org/repositories/devel:kubic:libcontainers:stable:cri-o:$VERSION/$OS/Release.key | apt-key add -'
    - 'curl -L https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/$OS/Release.key | apt-key add -'
    - apt-get update
    - apt-get install -y cri-o cri-o-runc
    - cat <<EOF | tee /etc/modules-load.d/criod.conf
    - overlay
    - br_netfilter
    - EOF
    - cat <<EOF | 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
    - modprobe overlay
    - modprobe br_netfilter
    - systemctl enable --now crio
    - apt-get install -y apt-transport-https curl
    - curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add -
    - cat <<EOF | tee /etc/apt/sources.list.d/kubernetes.list
    - deb https://apt.kubernetes.io/ kubernetes-xenial main
    - EOF
    - apt-get update
    - apt-get install -y kubelet kubeadm kubectl
description: "Profile to define k8s worker"
devices:
  eth0:
    name: eth0
    network: lxdbr0
    type: nic
  root:
    path: /
    pool: default
    type: disk
name: k8sworker
used_by: []

This is a LXD demo Profile to setup ubuntu 20.04 with K8S Master and Worker

To Run Master,

# Save this gist file as k8smaster-profile.yaml
lxc profile create k8smaster
cat k8smaster-profile.yaml | lxc profile edit k8smaster
lxc launch --profile k8smaster ubuntu:20.04 k8smaster --vm

To Run Worker,

# Save this gist file as k8sworker-profile.yaml
lxc profile create k8sworker
cat k8sworker-profile.yaml | lxc profile edit k8sworker
lxc launch --profile k8sworker ubuntu:20.04 k8sworker --vm