k8s_single_node.yaml

---
- hosts: k8s-server
  tasks:
    - name: "Installing vim"
      apt: pkg=vim state=installed
    - name: "Installing aptitude"
      apt: pkg=aptitude state=installed

    - name: "Getting docker package key"
      shell: curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

    - name: "Getting kubernetes package key"
      shell: curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add -

    - name: "Adding docker package repository"
      shell: add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"

    - name: "Adding docker repo"
      apt_repository:
        repo: deb [arch=amd64] https://download.docker.com/linux/ubuntu {{ ansible_lsb.codename }} stable
        state: present

    - name: "Adding kubernetes repo"
      apt_repository:
        repo: deb http://apt.kubernetes.io/ kubernetes-xenial main
        state: present

    - name: Update and upgrade apt packages
      become: true
      apt:
       upgrade: safe
       update_cache: yes

    - name: "Installing docker"
      package: name=docker-ce state=present

    - name: "Disabling swap"
      shell: swapoff -a
      tags:
        - configure

    - name: "Remove current swaps from fstab"
      lineinfile:
        dest: /etc/fstab
        regexp: '^/[\S]+\s+none\s+swap '
        state: absent

    - name: "Enable docker service"
      shell: systemctl enable docker

    - name: "Installing transport-https"
      apt: pkg=apt-transport-https state=installed

    - name: "Installing kubernetes"
      apt: name={{item}} state=installed
      with_items:
        - kubelet
        - kubeadm
        - kubectl
        - selinux-utils

    - name: "Reset kubernetes"
      shell: kubeadm reset -f
      tags:
        - reset

    - name: "Initializing kubernetes"
      shell: kubeadm init --pod-network-cidr=192.168.0.0/16 --apiserver-advertise-address $(hostname -i)
      tags:
        - reset

    - name: "Configuring kubectl"
      shell: mkdir -p $HOME/.kube;cp /etc/kubernetes/admin.conf $HOME/.kube/config;chown $(id -u):$(id -g) $HOME/.kube/config
      tags:
        - reset

    - name: "Configuring kubernetes network"
      shell: kubectl apply -f "https://cloud.weave.works/k8s/net?k8s-version=$(kubectl version | base64 | tr -d '\n')"
      tags:
        - network

    - name: "Configuring single node cluster"
      shell: kubectl taint nodes --all node-role.kubernetes.io/master-
      tags:
        - configure